ai_gui.cpp

Go to the documentation of this file.

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "../stdafx.h"
#include "../table/sprites.h"
#include "../error.h"
#include "../settings_gui.h"
#include "../querystring_gui.h"
#include "../stringfilter_type.h"
#include "../company_base.h"
#include "../company_gui.h"
#include "../strings_func.h"
#include "../window_func.h"
#include "../gfx_func.h"
#include "../command_func.h"
#include "../network/network.h"
#include "../settings_func.h"
#include "../network/network_content.h"
#include "../textfile_gui.h"
#include "../widgets/dropdown_type.h"
#include "../widgets/dropdown_func.h"
#include "../hotkeys.h"
#include "../core/geometry_func.hpp"
#include "../guitimer_func.h"
#include "../company_cmd.h"
#include "../misc_cmd.h"
 
#include "ai.hpp"
#include "ai_gui.hpp"
#include "../script/api/script_log.hpp"
#include "ai_config.hpp"
#include "ai_info.hpp"
#include "ai_instance.hpp"
#include "../game/game.hpp"
#include "../game/game_config.hpp"
#include "../game/game_info.hpp"
#include "../game/game_instance.hpp"
 
#include "table/strings.h"
 
#include <vector>
 
#include "../safeguards.h"
 
static ScriptConfig *GetConfig(CompanyID slot)
{
  if (slot == OWNER_DEITY) return GameConfig::GetConfig();
  return AIConfig::GetConfig(slot);
}
 
struct AIListWindow : public Window {
  const ScriptInfoList *info_list;    
  int selected;                       
  CompanyID slot;                     
  int line_height;                    
  Scrollbar *vscroll;                 
 
  AIListWindow(WindowDesc *desc, CompanyID slot) : Window(desc),
    slot(slot)
  {
    if (slot == OWNER_DEITY) {
      this->info_list = Game::GetUniqueInfoList();
    } else {
      this->info_list = AI::GetUniqueInfoList();
    }
 
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_AIL_SCROLLBAR);
    this->FinishInitNested(); // Initializes 'this->line_height' as side effect.
 
    this->vscroll->SetCount((int)this->info_list->size() + 1);
 
    /* Try if we can find the currently selected AI */
    this->selected = -1;
    if (GetConfig(slot)->HasScript()) {
      ScriptInfo *info = GetConfig(slot)->GetInfo();
      int i = 0;
      for (const auto &item : *this->info_list) {
        if (item.second == info) {
          this->selected = i;
          break;
        }
 
        i++;
      }
    }
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_AIL_CAPTION:
        SetDParam(0, (this->slot == OWNER_DEITY) ? STR_AI_LIST_CAPTION_GAMESCRIPT : STR_AI_LIST_CAPTION_AI);
        break;
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget == WID_AIL_LIST) {
      this->line_height = FONT_HEIGHT_NORMAL + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
 
      resize->width = 1;
      resize->height = this->line_height;
      size->height = 5 * this->line_height;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_AIL_LIST: {
        /* Draw a list of all available AIs. */
        int y = this->GetWidget<NWidgetBase>(WID_AIL_LIST)->pos_y;
        /* First AI in the list is hardcoded to random */
        if (this->vscroll->IsVisible(0)) {
          DrawString(r.left + WD_MATRIX_LEFT, r.right - WD_MATRIX_LEFT, y + WD_MATRIX_TOP, this->slot == OWNER_DEITY ? STR_AI_CONFIG_NONE : STR_AI_CONFIG_RANDOM_AI, this->selected == -1 ? TC_WHITE : TC_ORANGE);
          y += this->line_height;
        }
        int i = 0;
        for (const auto &item : *this->info_list) {
          i++;
          if (this->vscroll->IsVisible(i)) {
            DrawString(r.left + WD_MATRIX_LEFT, r.right - WD_MATRIX_RIGHT, y + WD_MATRIX_TOP, item.second->GetName(), (this->selected == i - 1) ? TC_WHITE : TC_ORANGE);
            y += this->line_height;
          }
        }
        break;
      }
      case WID_AIL_INFO_BG: {
        AIInfo *selected_info = nullptr;
        int i = 0;
        for (const auto &item : *this->info_list) {
          i++;
          if (this->selected == i - 1) selected_info = static_cast<AIInfo *>(item.second);
        }
        /* Some info about the currently selected AI. */
        if (selected_info != nullptr) {
          int y = r.top + WD_FRAMERECT_TOP;
          SetDParamStr(0, selected_info->GetAuthor());
          DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_AI_LIST_AUTHOR);
          y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
          SetDParam(0, selected_info->GetVersion());
          DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_AI_LIST_VERSION);
          y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
          if (selected_info->GetURL() != nullptr) {
            SetDParamStr(0, selected_info->GetURL());
            DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, STR_AI_LIST_URL);
            y += FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
          }
          SetDParamStr(0, selected_info->GetDescription());
          DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, y, r.bottom - WD_FRAMERECT_BOTTOM, STR_JUST_RAW_STRING, TC_WHITE);
        }
        break;
      }
    }
  }
 
  void ChangeAI()
  {
    if (this->selected == -1) {
      GetConfig(slot)->Change(nullptr);
    } else {
      ScriptInfoList::const_iterator it = this->info_list->begin();
      for (int i = 0; i < this->selected; i++) it++;
      GetConfig(slot)->Change((*it).second->GetName(), (*it).second->GetVersion());
    }
    InvalidateWindowData(WC_GAME_OPTIONS, WN_GAME_OPTIONS_AI);
    InvalidateWindowClassesData(WC_AI_SETTINGS);
    CloseWindowByClass(WC_QUERY_STRING);
    InvalidateWindowClassesData(WC_TEXTFILE);
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_AIL_LIST: { // Select one of the AIs
        int sel = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_AIL_LIST) - 1;
        if (sel < (int)this->info_list->size()) {
          this->selected = sel;
          this->SetDirty();
          if (click_count > 1) {
            this->ChangeAI();
            this->Close();
          }
        }
        break;
      }
 
      case WID_AIL_ACCEPT: {
        this->ChangeAI();
        this->Close();
        break;
      }
 
      case WID_AIL_CANCEL:
        this->Close();
        break;
    }
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_AIL_LIST);
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (_game_mode == GM_NORMAL && Company::IsValidID(this->slot)) {
      this->Close();
      return;
    }
 
    if (!gui_scope) return;
 
    this->vscroll->SetCount((int)this->info_list->size() + 1);
 
    /* selected goes from -1 .. length of ai list - 1. */
    this->selected = std::min(this->selected, this->vscroll->GetCount() - 2);
  }
};
 
static const NWidgetPart _nested_ai_list_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_MAUVE),
    NWidget(WWT_CAPTION, COLOUR_MAUVE, WID_AIL_CAPTION), SetDataTip(STR_AI_LIST_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_DEFSIZEBOX, COLOUR_MAUVE),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_MATRIX, COLOUR_MAUVE, WID_AIL_LIST), SetMinimalSize(188, 112), SetFill(1, 1), SetResize(1, 1), SetMatrixDataTip(1, 0, STR_AI_LIST_TOOLTIP), SetScrollbar(WID_AIL_SCROLLBAR),
    NWidget(NWID_VSCROLLBAR, COLOUR_MAUVE, WID_AIL_SCROLLBAR),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_MAUVE, WID_AIL_INFO_BG), SetMinimalTextLines(8, WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM), SetResize(1, 0),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
      NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_AIL_ACCEPT), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_AI_LIST_ACCEPT, STR_AI_LIST_ACCEPT_TOOLTIP),
      NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_AIL_CANCEL), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_AI_LIST_CANCEL, STR_AI_LIST_CANCEL_TOOLTIP),
    EndContainer(),
    NWidget(WWT_RESIZEBOX, COLOUR_MAUVE),
  EndContainer(),
};
 
static WindowDesc _ai_list_desc(
  WDP_CENTER, "settings_script_list", 200, 234,
  WC_AI_LIST, WC_NONE,
  0,
  _nested_ai_list_widgets, lengthof(_nested_ai_list_widgets)
);
 
static void ShowAIListWindow(CompanyID slot)
{
  CloseWindowByClass(WC_AI_LIST);
  new AIListWindow(&_ai_list_desc, slot);
}
 
struct AISettingsWindow : public Window {
  CompanyID slot;                       
  ScriptConfig *ai_config;              
  int clicked_button;                   
  bool clicked_increase;                
  bool clicked_dropdown;                
  bool closing_dropdown;                
  GUITimer timeout;                     
  int clicked_row;                      
  int line_height;                      
  Scrollbar *vscroll;                   
  typedef std::vector<const ScriptConfigItem *> VisibleSettingsList;
  VisibleSettingsList visible_settings; 
 
  AISettingsWindow(WindowDesc *desc, CompanyID slot) : Window(desc),
    slot(slot),
    clicked_button(-1),
    clicked_dropdown(false),
    closing_dropdown(false),
    timeout(0)
  {
    this->ai_config = GetConfig(slot);
 
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_AIS_SCROLLBAR);
    this->FinishInitNested(slot);  // Initializes 'this->line_height' as side effect.
 
    this->RebuildVisibleSettings();
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_AIS_CAPTION:
        SetDParam(0, (this->slot == OWNER_DEITY) ? STR_AI_SETTINGS_CAPTION_GAMESCRIPT : STR_AI_SETTINGS_CAPTION_AI);
        break;
    }
  }
 
  void RebuildVisibleSettings()
  {
    visible_settings.clear();
 
    for (const auto &item : *this->ai_config->GetConfigList()) {
      bool no_hide = (item.flags & SCRIPTCONFIG_DEVELOPER) == 0;
      if (no_hide || _settings_client.gui.ai_developer_tools) {
        visible_settings.push_back(&item);
      }
    }
 
    this->vscroll->SetCount((int)this->visible_settings.size());
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget == WID_AIS_BACKGROUND) {
      this->line_height = std::max(SETTING_BUTTON_HEIGHT, FONT_HEIGHT_NORMAL) + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
 
      resize->width = 1;
      resize->height = this->line_height;
      size->height = 5 * this->line_height;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (widget != WID_AIS_BACKGROUND) return;
 
    ScriptConfig *config = this->ai_config;
    VisibleSettingsList::const_iterator it = this->visible_settings.begin();
    int i = 0;
    for (; !this->vscroll->IsVisible(i); i++) it++;
 
    bool rtl = _current_text_dir == TD_RTL;
    uint buttons_left = rtl ? r.right - SETTING_BUTTON_WIDTH - 3 : r.left + 4;
    uint text_left    = r.left + (rtl ? WD_FRAMERECT_LEFT : SETTING_BUTTON_WIDTH + 8);
    uint text_right   = r.right - (rtl ? SETTING_BUTTON_WIDTH + 8 : WD_FRAMERECT_RIGHT);
 
 
    int y = r.top;
    int button_y_offset = (this->line_height - SETTING_BUTTON_HEIGHT) / 2;
    int text_y_offset = (this->line_height - FONT_HEIGHT_NORMAL) / 2;
    for (; this->vscroll->IsVisible(i) && it != visible_settings.end(); i++, it++) {
      const ScriptConfigItem &config_item = **it;
      int current_value = config->GetSetting((config_item).name);
      bool editable = this->IsEditableItem(config_item);
 
      StringID str;
      TextColour colour;
      uint idx = 0;
      if (StrEmpty(config_item.description)) {
        if (!strcmp(config_item.name, "start_date")) {
          /* Build-in translation */
          str = STR_AI_SETTINGS_START_DELAY;
          colour = TC_LIGHT_BLUE;
        } else {
          str = STR_JUST_STRING;
          colour = TC_ORANGE;
        }
      } else {
        str = STR_AI_SETTINGS_SETTING;
        colour = TC_LIGHT_BLUE;
        SetDParamStr(idx++, config_item.description);
      }
 
      if ((config_item.flags & SCRIPTCONFIG_BOOLEAN) != 0) {
        DrawBoolButton(buttons_left, y + button_y_offset, current_value != 0, editable);
        SetDParam(idx++, current_value == 0 ? STR_CONFIG_SETTING_OFF : STR_CONFIG_SETTING_ON);
      } else {
        if (config_item.complete_labels) {
          DrawDropDownButton(buttons_left, y + button_y_offset, COLOUR_YELLOW, this->clicked_row == i && clicked_dropdown, editable);
        } else {
          DrawArrowButtons(buttons_left, y + button_y_offset, COLOUR_YELLOW, (this->clicked_button == i) ? 1 + (this->clicked_increase != rtl) : 0, editable && current_value > config_item.min_value, editable && current_value < config_item.max_value);
        }
        if (config_item.labels != nullptr && config_item.labels->Contains(current_value)) {
          SetDParam(idx++, STR_JUST_RAW_STRING);
          SetDParamStr(idx++, config_item.labels->Find(current_value)->second);
        } else {
          SetDParam(idx++, STR_JUST_INT);
          SetDParam(idx++, current_value);
        }
      }
 
      DrawString(text_left, text_right, y + text_y_offset, str, colour);
      y += this->line_height;
    }
  }
 
  void OnPaint() override
  {
    if (this->closing_dropdown) {
      this->closing_dropdown = false;
      this->clicked_dropdown = false;
    }
    this->DrawWidgets();
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    switch (widget) {
      case WID_AIS_BACKGROUND: {
        const NWidgetBase *wid = this->GetWidget<NWidgetBase>(WID_AIS_BACKGROUND);
        int num = (pt.y - wid->pos_y) / this->line_height + this->vscroll->GetPosition();
        if (num >= (int)this->visible_settings.size()) break;
 
        VisibleSettingsList::const_iterator it = this->visible_settings.begin();
        for (int i = 0; i < num; i++) it++;
        const ScriptConfigItem config_item = **it;
        if (!this->IsEditableItem(config_item)) return;
 
        if (this->clicked_row != num) {
          this->CloseChildWindows(WC_QUERY_STRING);
          HideDropDownMenu(this);
          this->clicked_row = num;
          this->clicked_dropdown = false;
        }
 
        bool bool_item = (config_item.flags & SCRIPTCONFIG_BOOLEAN) != 0;
 
        int x = pt.x - wid->pos_x;
        if (_current_text_dir == TD_RTL) x = wid->current_x - 1 - x;
        x -= 4;
 
        /* One of the arrows is clicked (or green/red rect in case of bool value) */
        int old_val = this->ai_config->GetSetting(config_item.name);
        if (!bool_item && IsInsideMM(x, 0, SETTING_BUTTON_WIDTH) && config_item.complete_labels) {
          if (this->clicked_dropdown) {
            /* unclick the dropdown */
            HideDropDownMenu(this);
            this->clicked_dropdown = false;
            this->closing_dropdown = false;
          } else {
            const NWidgetBase *wid = this->GetWidget<NWidgetBase>(WID_AIS_BACKGROUND);
            int rel_y = (pt.y - (int)wid->pos_y) % this->line_height;
 
            Rect wi_rect;
            wi_rect.left = pt.x - (_current_text_dir == TD_RTL ? SETTING_BUTTON_WIDTH - 1 - x : x);
            wi_rect.right = wi_rect.left + SETTING_BUTTON_WIDTH - 1;
            wi_rect.top = pt.y - rel_y + (this->line_height - SETTING_BUTTON_HEIGHT) / 2;
            wi_rect.bottom = wi_rect.top + SETTING_BUTTON_HEIGHT - 1;
 
            /* For dropdowns we also have to check the y position thoroughly, the mouse may not above the just opening dropdown */
            if (pt.y >= wi_rect.top && pt.y <= wi_rect.bottom) {
              this->clicked_dropdown = true;
              this->closing_dropdown = false;
 
              DropDownList list;
              for (int i = config_item.min_value; i <= config_item.max_value; i++) {
                list.emplace_back(new DropDownListCharStringItem(config_item.labels->Find(i)->second, i, false));
              }
 
              ShowDropDownListAt(this, std::move(list), old_val, -1, wi_rect, COLOUR_ORANGE, true);
            }
          }
        } else if (IsInsideMM(x, 0, SETTING_BUTTON_WIDTH)) {
          int new_val = old_val;
          if (bool_item) {
            new_val = !new_val;
          } else if (x >= SETTING_BUTTON_WIDTH / 2) {
            /* Increase button clicked */
            new_val += config_item.step_size;
            if (new_val > config_item.max_value) new_val = config_item.max_value;
            this->clicked_increase = true;
          } else {
            /* Decrease button clicked */
            new_val -= config_item.step_size;
            if (new_val < config_item.min_value) new_val = config_item.min_value;
            this->clicked_increase = false;
          }
 
          if (new_val != old_val) {
            this->ai_config->SetSetting(config_item.name, new_val);
            this->clicked_button = num;
            this->timeout.SetInterval(150);
          }
        } else if (!bool_item && !config_item.complete_labels) {
          /* Display a query box so users can enter a custom value. */
          SetDParam(0, old_val);
          ShowQueryString(STR_JUST_INT, STR_CONFIG_SETTING_QUERY_CAPTION, 10, this, CS_NUMERAL, QSF_NONE);
        }
        this->SetDirty();
        break;
      }
 
      case WID_AIS_ACCEPT:
        this->Close();
        break;
 
      case WID_AIS_RESET:
        this->ai_config->ResetEditableSettings(_game_mode == GM_MENU || ((this->slot != OWNER_DEITY) && !Company::IsValidID(this->slot)));
        this->SetDirty();
        break;
    }
  }
 
  void OnQueryTextFinished(char *str) override
  {
    if (StrEmpty(str)) return;
    VisibleSettingsList::const_iterator it = this->visible_settings.begin();
    for (int i = 0; i < this->clicked_row; i++) it++;
    const ScriptConfigItem config_item = **it;
    if (_game_mode == GM_NORMAL && ((this->slot == OWNER_DEITY) || Company::IsValidID(this->slot)) && (config_item.flags & SCRIPTCONFIG_INGAME) == 0) return;
    int32 value = atoi(str);
    this->ai_config->SetSetting(config_item.name, value);
    this->SetDirty();
  }
 
  void OnDropdownSelect(int widget, int index) override
  {
    assert(this->clicked_dropdown);
    VisibleSettingsList::const_iterator it = this->visible_settings.begin();
    for (int i = 0; i < this->clicked_row; i++) it++;
    const ScriptConfigItem config_item = **it;
    if (_game_mode == GM_NORMAL && ((this->slot == OWNER_DEITY) || Company::IsValidID(this->slot)) && (config_item.flags & SCRIPTCONFIG_INGAME) == 0) return;
    this->ai_config->SetSetting(config_item.name, index);
    this->SetDirty();
  }
 
  void OnDropdownClose(Point pt, int widget, int index, bool instant_close) override
  {
    /* We cannot raise the dropdown button just yet. OnClick needs some hint, whether
     * the same dropdown button was clicked again, and then not open the dropdown again.
     * So, we only remember that it was closed, and process it on the next OnPaint, which is
     * after OnClick. */
    assert(this->clicked_dropdown);
    this->closing_dropdown = true;
    this->SetDirty();
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_AIS_BACKGROUND);
  }
 
  void OnRealtimeTick(uint delta_ms) override
  {
    if (this->timeout.Elapsed(delta_ms)) {
      this->clicked_button = -1;
      this->SetDirty();
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    this->RebuildVisibleSettings();
    HideDropDownMenu(this);
    this->CloseChildWindows(WC_QUERY_STRING);
  }
 
private:
  bool IsEditableItem(const ScriptConfigItem &config_item) const
  {
    return _game_mode == GM_MENU || ((this->slot != OWNER_DEITY) && !Company::IsValidID(this->slot)) || (config_item.flags & SCRIPTCONFIG_INGAME) != 0;
  }
};
 
static const NWidgetPart _nested_ai_settings_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_MAUVE),
    NWidget(WWT_CAPTION, COLOUR_MAUVE, WID_AIS_CAPTION), SetDataTip(STR_AI_SETTINGS_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_DEFSIZEBOX, COLOUR_MAUVE),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_MATRIX, COLOUR_MAUVE, WID_AIS_BACKGROUND), SetMinimalSize(188, 182), SetResize(1, 1), SetFill(1, 0), SetMatrixDataTip(1, 0, STR_NULL), SetScrollbar(WID_AIS_SCROLLBAR),
    NWidget(NWID_VSCROLLBAR, COLOUR_MAUVE, WID_AIS_SCROLLBAR),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
      NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_AIS_ACCEPT), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_AI_SETTINGS_CLOSE, STR_NULL),
      NWidget(WWT_PUSHTXTBTN, COLOUR_MAUVE, WID_AIS_RESET), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_AI_SETTINGS_RESET, STR_NULL),
    EndContainer(),
    NWidget(WWT_RESIZEBOX, COLOUR_MAUVE),
  EndContainer(),
};
 
static WindowDesc _ai_settings_desc(
  WDP_CENTER, "settings_script", 500, 208,
  WC_AI_SETTINGS, WC_NONE,
  0,
  _nested_ai_settings_widgets, lengthof(_nested_ai_settings_widgets)
);
 
static void ShowAISettingsWindow(CompanyID slot)
{
  CloseWindowByClass(WC_AI_LIST);
  CloseWindowByClass(WC_AI_SETTINGS);
  new AISettingsWindow(&_ai_settings_desc, slot);
}
 
 
struct ScriptTextfileWindow : public TextfileWindow {
  CompanyID slot; 
 
  ScriptTextfileWindow(TextfileType file_type, CompanyID slot) : TextfileWindow(file_type), slot(slot)
  {
    this->OnInvalidateData();
  }
 
  void SetStringParameters(int widget) const override
  {
    if (widget == WID_TF_CAPTION) {
      SetDParam(0, (slot == OWNER_DEITY) ? STR_CONTENT_TYPE_GAME_SCRIPT : STR_CONTENT_TYPE_AI);
      SetDParamStr(1, GetConfig(slot)->GetInfo()->GetName());
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    const char *textfile = GetConfig(slot)->GetTextfile(file_type, slot);
    if (textfile == nullptr) {
      this->Close();
    } else {
      this->LoadTextfile(textfile, (slot == OWNER_DEITY) ? GAME_DIR : AI_DIR);
    }
  }
};
 
void ShowScriptTextfileWindow(TextfileType file_type, CompanyID slot)
{
  CloseWindowById(WC_TEXTFILE, file_type);
  new ScriptTextfileWindow(file_type, slot);
}
 
 
static const NWidgetPart _nested_ai_config_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_MAUVE),
    NWidget(WWT_CAPTION, COLOUR_MAUVE), SetDataTip(STR_AI_CONFIG_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_MAUVE, WID_AIC_BACKGROUND),
    NWidget(NWID_VERTICAL), SetPIP(4, 4, 4),
      NWidget(NWID_HORIZONTAL), SetPIP(7, 0, 7),
        NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_AIC_DECREASE), SetDataTip(AWV_DECREASE, STR_NULL),
        NWidget(WWT_PUSHARROWBTN, COLOUR_YELLOW, WID_AIC_INCREASE), SetDataTip(AWV_INCREASE, STR_NULL),
        NWidget(NWID_SPACER), SetMinimalSize(6, 0),
        NWidget(WWT_TEXT, COLOUR_MAUVE, WID_AIC_NUMBER), SetDataTip(STR_DIFFICULTY_LEVEL_SETTING_MAXIMUM_NO_COMPETITORS, STR_NULL), SetFill(1, 0),
      EndContainer(),
      NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(7, 0, 7),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_MOVE_UP), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_AI_CONFIG_MOVE_UP, STR_AI_CONFIG_MOVE_UP_TOOLTIP),
        NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_MOVE_DOWN), SetResize(1, 0), SetFill(1, 0), SetDataTip(STR_AI_CONFIG_MOVE_DOWN, STR_AI_CONFIG_MOVE_DOWN_TOOLTIP),
      EndContainer(),
    EndContainer(),
    NWidget(WWT_FRAME, COLOUR_MAUVE), SetDataTip(STR_AI_CONFIG_AI, STR_NULL), SetPadding(0, 5, 0, 5),
      NWidget(NWID_HORIZONTAL),
        NWidget(WWT_MATRIX, COLOUR_MAUVE, WID_AIC_LIST), SetMinimalSize(288, 112), SetFill(1, 0), SetMatrixDataTip(1, 8, STR_AI_CONFIG_AILIST_TOOLTIP), SetScrollbar(WID_AIC_SCROLLBAR),
        NWidget(NWID_VSCROLLBAR, COLOUR_MAUVE, WID_AIC_SCROLLBAR),
      EndContainer(),
    EndContainer(),
    NWidget(NWID_SPACER), SetMinimalSize(0, 9),
    NWidget(WWT_FRAME, COLOUR_MAUVE), SetDataTip(STR_AI_CONFIG_GAMESCRIPT, STR_NULL), SetPadding(0, 5, 4, 5),
      NWidget(WWT_MATRIX, COLOUR_MAUVE, WID_AIC_GAMELIST), SetMinimalSize(288, 14), SetFill(1, 0), SetMatrixDataTip(1, 1, STR_AI_CONFIG_GAMELIST_TOOLTIP),
    EndContainer(),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(7, 0, 7),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_CHANGE), SetFill(1, 0), SetMinimalSize(93, 0), SetDataTip(STR_AI_CONFIG_CHANGE, STR_AI_CONFIG_CHANGE_TOOLTIP),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_CONFIGURE), SetFill(1, 0), SetMinimalSize(93, 0), SetDataTip(STR_AI_CONFIG_CONFIGURE, STR_AI_CONFIG_CONFIGURE_TOOLTIP),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_CLOSE), SetFill(1, 0), SetMinimalSize(93, 0), SetDataTip(STR_AI_SETTINGS_CLOSE, STR_NULL),
    EndContainer(),
    NWidget(NWID_HORIZONTAL, NC_EQUALSIZE), SetPIP(7, 0, 7),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_TEXTFILE + TFT_README), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_README, STR_NULL),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_TEXTFILE + TFT_CHANGELOG), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_CHANGELOG, STR_NULL),
      NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_TEXTFILE + TFT_LICENSE), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TEXTFILE_VIEW_LICENCE, STR_NULL),
    EndContainer(),
    NWidget(WWT_PUSHTXTBTN, COLOUR_YELLOW, WID_AIC_CONTENT_DOWNLOAD), SetFill(1, 0), SetMinimalSize(279, 0), SetPadding(0, 7, 9, 7), SetDataTip(STR_INTRO_ONLINE_CONTENT, STR_INTRO_TOOLTIP_ONLINE_CONTENT),
  EndContainer(),
};
 
static WindowDesc _ai_config_desc(
  WDP_CENTER, "settings_script_config", 0, 0,
  WC_GAME_OPTIONS, WC_NONE,
  0,
  _nested_ai_config_widgets, lengthof(_nested_ai_config_widgets)
);
 
struct AIConfigWindow : public Window {
  CompanyID selected_slot; 
  int line_height;         
  Scrollbar *vscroll;      
 
  AIConfigWindow() : Window(&_ai_config_desc)
  {
    this->InitNested(WN_GAME_OPTIONS_AI); // Initializes 'this->line_height' as a side effect.
    this->vscroll = this->GetScrollbar(WID_AIC_SCROLLBAR);
    this->selected_slot = INVALID_COMPANY;
    NWidgetCore *nwi = this->GetWidget<NWidgetCore>(WID_AIC_LIST);
    this->vscroll->SetCapacity(nwi->current_y / this->line_height);
    this->vscroll->SetCount(MAX_COMPANIES);
    this->OnInvalidateData(0);
  }
 
  void Close() override
  {
    CloseWindowByClass(WC_AI_LIST);
    CloseWindowByClass(WC_AI_SETTINGS);
    this->Window::Close();
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_AIC_NUMBER:
        SetDParam(0, GetGameSettings().difficulty.max_no_competitors);
        break;
      case WID_AIC_CHANGE:
        switch (selected_slot) {
          case OWNER_DEITY:
            SetDParam(0, STR_AI_CONFIG_CHANGE_GAMESCRIPT);
            break;
 
          case INVALID_COMPANY:
            SetDParam(0, STR_AI_CONFIG_CHANGE_NONE);
            break;
 
          default:
            SetDParam(0, STR_AI_CONFIG_CHANGE_AI);
            break;
        }
        break;
    }
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    switch (widget) {
      case WID_AIC_DECREASE:
      case WID_AIC_INCREASE:
        *size = maxdim(*size, NWidgetScrollbar::GetHorizontalDimension());
        break;
 
      case WID_AIC_GAMELIST:
        this->line_height = FONT_HEIGHT_NORMAL + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
        size->height = 1 * this->line_height;
        break;
 
      case WID_AIC_LIST:
        this->line_height = FONT_HEIGHT_NORMAL + WD_MATRIX_TOP + WD_MATRIX_BOTTOM;
        resize->height = this->line_height;
        size->height = 8 * this->line_height;
        break;
 
      case WID_AIC_CHANGE: {
        SetDParam(0, STR_AI_CONFIG_CHANGE_GAMESCRIPT);
        Dimension dim = GetStringBoundingBox(STR_AI_CONFIG_CHANGE);
 
        SetDParam(0, STR_AI_CONFIG_CHANGE_NONE);
        dim = maxdim(dim, GetStringBoundingBox(STR_AI_CONFIG_CHANGE));
 
        SetDParam(0, STR_AI_CONFIG_CHANGE_AI);
        dim = maxdim(dim, GetStringBoundingBox(STR_AI_CONFIG_CHANGE));
 
        dim.width += padding.width;
        dim.height += padding.height;
        *size = maxdim(*size, dim);
        break;
      }
    }
  }
 
  static bool IsEditable(CompanyID slot)
  {
    if (slot == OWNER_DEITY) return _game_mode != GM_NORMAL || Game::GetInstance() != nullptr;
 
    if (_game_mode != GM_NORMAL) {
      return slot > 0 && slot <= GetGameSettings().difficulty.max_no_competitors;
    }
    if (Company::IsValidID(slot)) return false;
 
    int max_slot = GetGameSettings().difficulty.max_no_competitors;
    for (CompanyID cid = COMPANY_FIRST; cid < (CompanyID)max_slot && cid < MAX_COMPANIES; cid++) {
      if (Company::IsValidHumanID(cid)) max_slot++;
    }
    return slot < max_slot;
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    switch (widget) {
      case WID_AIC_GAMELIST: {
        StringID text = STR_AI_CONFIG_NONE;
 
        if (GameConfig::GetConfig()->GetInfo() != nullptr) {
          SetDParamStr(0, GameConfig::GetConfig()->GetInfo()->GetName());
          text = STR_JUST_RAW_STRING;
        }
 
        DrawString(r.left + 10, r.right - 10, r.top + WD_MATRIX_TOP, text,
            (this->selected_slot == OWNER_DEITY) ? TC_WHITE : (IsEditable(OWNER_DEITY) ? TC_ORANGE : TC_SILVER));
 
        break;
      }
 
      case WID_AIC_LIST: {
        int y = r.top;
        for (int i = this->vscroll->GetPosition(); this->vscroll->IsVisible(i) && i < MAX_COMPANIES; i++) {
          StringID text;
 
          if ((_game_mode != GM_NORMAL && i == 0) || (_game_mode == GM_NORMAL && Company::IsValidHumanID(i))) {
            text = STR_AI_CONFIG_HUMAN_PLAYER;
          } else if (AIConfig::GetConfig((CompanyID)i)->GetInfo() != nullptr) {
            SetDParamStr(0, AIConfig::GetConfig((CompanyID)i)->GetInfo()->GetName());
            text = STR_JUST_RAW_STRING;
          } else {
            text = STR_AI_CONFIG_RANDOM_AI;
          }
          DrawString(r.left + 10, r.right - 10, y + WD_MATRIX_TOP, text,
              (this->selected_slot == i) ? TC_WHITE : (IsEditable((CompanyID)i) ? TC_ORANGE : TC_SILVER));
          y += this->line_height;
        }
        break;
      }
    }
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    if (widget >= WID_AIC_TEXTFILE && widget < WID_AIC_TEXTFILE + TFT_END) {
      if (this->selected_slot == INVALID_COMPANY || GetConfig(this->selected_slot) == nullptr) return;
 
      ShowScriptTextfileWindow((TextfileType)(widget - WID_AIC_TEXTFILE), this->selected_slot);
      return;
    }
 
    switch (widget) {
      case WID_AIC_DECREASE:
      case WID_AIC_INCREASE: {
        int new_value;
        if (widget == WID_AIC_DECREASE) {
          new_value = std::max(0, GetGameSettings().difficulty.max_no_competitors - 1);
        } else {
          new_value = std::min(MAX_COMPANIES - 1, GetGameSettings().difficulty.max_no_competitors + 1);
        }
        IConsoleSetSetting("difficulty.max_no_competitors", new_value);
        break;
      }
 
      case WID_AIC_GAMELIST: {
        this->selected_slot = OWNER_DEITY;
        this->InvalidateData();
        if (click_count > 1 && this->selected_slot != INVALID_COMPANY && _game_mode != GM_NORMAL) ShowAIListWindow((CompanyID)this->selected_slot);
        break;
      }
 
      case WID_AIC_LIST: { // Select a slot
        this->selected_slot = (CompanyID)this->vscroll->GetScrolledRowFromWidget(pt.y, this, widget);
        this->InvalidateData();
        if (click_count > 1 && this->selected_slot != INVALID_COMPANY) ShowAIListWindow((CompanyID)this->selected_slot);
        break;
      }
 
      case WID_AIC_MOVE_UP:
        if (IsEditable(this->selected_slot) && IsEditable((CompanyID)(this->selected_slot - 1))) {
          Swap(GetGameSettings().ai_config[this->selected_slot], GetGameSettings().ai_config[this->selected_slot - 1]);
          this->selected_slot--;
          this->vscroll->ScrollTowards(this->selected_slot);
          this->InvalidateData();
        }
        break;
 
      case WID_AIC_MOVE_DOWN:
        if (IsEditable(this->selected_slot) && IsEditable((CompanyID)(this->selected_slot + 1))) {
          Swap(GetGameSettings().ai_config[this->selected_slot], GetGameSettings().ai_config[this->selected_slot + 1]);
          this->selected_slot++;
          this->vscroll->ScrollTowards(this->selected_slot);
          this->InvalidateData();
        }
        break;
 
      case WID_AIC_CHANGE:  // choose other AI
        ShowAIListWindow((CompanyID)this->selected_slot);
        break;
 
      case WID_AIC_CONFIGURE: // change the settings for an AI
        ShowAISettingsWindow((CompanyID)this->selected_slot);
        break;
 
      case WID_AIC_CLOSE:
        this->Close();
        break;
 
      case WID_AIC_CONTENT_DOWNLOAD:
        if (!_network_available) {
          ShowErrorMessage(STR_NETWORK_ERROR_NOTAVAILABLE, INVALID_STRING_ID, WL_ERROR);
        } else {
          ShowNetworkContentListWindow(nullptr, CONTENT_TYPE_AI, CONTENT_TYPE_GAME);
        }
        break;
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    if (!IsEditable(this->selected_slot)) {
      this->selected_slot = INVALID_COMPANY;
    }
 
    if (!gui_scope) return;
 
    this->SetWidgetDisabledState(WID_AIC_DECREASE, GetGameSettings().difficulty.max_no_competitors == 0);
    this->SetWidgetDisabledState(WID_AIC_INCREASE, GetGameSettings().difficulty.max_no_competitors == MAX_COMPANIES - 1);
    this->SetWidgetDisabledState(WID_AIC_CHANGE, (this->selected_slot == OWNER_DEITY && _game_mode == GM_NORMAL) || this->selected_slot == INVALID_COMPANY);
    this->SetWidgetDisabledState(WID_AIC_CONFIGURE, this->selected_slot == INVALID_COMPANY || GetConfig(this->selected_slot)->GetConfigList()->size() == 0);
    this->SetWidgetDisabledState(WID_AIC_MOVE_UP, this->selected_slot == OWNER_DEITY || this->selected_slot == INVALID_COMPANY || !IsEditable((CompanyID)(this->selected_slot - 1)));
    this->SetWidgetDisabledState(WID_AIC_MOVE_DOWN, this->selected_slot == OWNER_DEITY || this->selected_slot == INVALID_COMPANY || !IsEditable((CompanyID)(this->selected_slot + 1)));
 
    for (TextfileType tft = TFT_BEGIN; tft < TFT_END; tft++) {
      this->SetWidgetDisabledState(WID_AIC_TEXTFILE + tft, this->selected_slot == INVALID_COMPANY || (GetConfig(this->selected_slot)->GetTextfile(tft, this->selected_slot) == nullptr));
    }
  }
};
 
void ShowAIConfigWindow()
{
  CloseWindowByClass(WC_GAME_OPTIONS);
  new AIConfigWindow();
}
 
static bool SetScriptButtonColour(NWidgetCore &button, bool dead, bool paused)
{
  /* Dead scripts are indicated with red background and
   * paused scripts are indicated with yellow background. */
  Colours colour = dead ? COLOUR_RED :
      (paused ? COLOUR_YELLOW : COLOUR_GREY);
  if (button.colour != colour) {
    button.colour = colour;
    return true;
  }
  return false;
}
 
struct AIDebugWindow : public Window {
  static const int top_offset;    
  static const int bottom_offset; 
 
  static const uint MAX_BREAK_STR_STRING_LENGTH = 256;   
 
  static CompanyID ai_debug_company;                     
  int redraw_timer;                                      
  int last_vscroll_pos;                                  
  bool autoscroll;                                       
  bool show_break_box;                                   
  static bool break_check_enabled;                       
  static char break_string[MAX_BREAK_STR_STRING_LENGTH]; 
  QueryString break_editbox;                             
  static StringFilter break_string_filter;               
  static bool case_sensitive_break_check;                
  int highlight_row;                                     
  Scrollbar *vscroll;                                    
 
  ScriptLog::LogData *GetLogPointer() const
  {
    if (ai_debug_company == OWNER_DEITY) return (ScriptLog::LogData *)Game::GetInstance()->GetLogPointer();
    return (ScriptLog::LogData *)Company::Get(ai_debug_company)->ai_instance->GetLogPointer();
  }
 
  bool IsDead() const
  {
    if (ai_debug_company == OWNER_DEITY) {
      GameInstance *game = Game::GetInstance();
      return game == nullptr || game->IsDead();
    }
    return !Company::IsValidAiID(ai_debug_company) || Company::Get(ai_debug_company)->ai_instance->IsDead();
  }
 
  bool IsValidDebugCompany(CompanyID company) const
  {
    switch (company) {
      case INVALID_COMPANY: return false;
      case OWNER_DEITY:     return Game::GetInstance() != nullptr;
      default:              return Company::IsValidAiID(company);
    }
  }
 
  void SelectValidDebugCompany()
  {
    /* Check if the currently selected company is still active. */
    if (this->IsValidDebugCompany(ai_debug_company)) return;
 
    ai_debug_company = INVALID_COMPANY;
 
    for (const Company *c : Company::Iterate()) {
      if (c->is_ai) {
        ChangeToAI(c->index);
        return;
      }
    }
 
    /* If no AI is available, see if there is a game script. */
    if (Game::GetInstance() != nullptr) ChangeToAI(OWNER_DEITY);
  }
 
  AIDebugWindow(WindowDesc *desc, WindowNumber number) : Window(desc), break_editbox(MAX_BREAK_STR_STRING_LENGTH)
  {
    this->CreateNestedTree();
    this->vscroll = this->GetScrollbar(WID_AID_SCROLLBAR);
    this->show_break_box = _settings_client.gui.ai_developer_tools;
    this->GetWidget<NWidgetStacked>(WID_AID_BREAK_STRING_WIDGETS)->SetDisplayedPlane(this->show_break_box ? 0 : SZSP_HORIZONTAL);
    this->FinishInitNested(number);
 
    if (!this->show_break_box) break_check_enabled = false;
 
    this->last_vscroll_pos = 0;
    this->autoscroll = true;
    this->highlight_row = -1;
 
    this->querystrings[WID_AID_BREAK_STR_EDIT_BOX] = &this->break_editbox;
 
    SetWidgetsDisabledState(!this->show_break_box, WID_AID_BREAK_STR_ON_OFF_BTN, WID_AID_BREAK_STR_EDIT_BOX, WID_AID_MATCH_CASE_BTN, WIDGET_LIST_END);
 
    /* Restore the break string value from static variable */
    this->break_editbox.text.Assign(this->break_string);
 
    this->SelectValidDebugCompany();
    this->InvalidateData(-1);
  }
 
  void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
  {
    if (widget == WID_AID_LOG_PANEL) {
      resize->height = FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL;
      size->height = 14 * resize->height + this->top_offset + this->bottom_offset;
    }
  }
 
  void OnPaint() override
  {
    this->SelectValidDebugCompany();
 
    /* Draw standard stuff */
    this->DrawWidgets();
 
    if (this->IsShaded()) return; // Don't draw anything when the window is shaded.
 
    bool dirty = false;
 
    /* Paint the company icons */
    for (CompanyID i = COMPANY_FIRST; i < MAX_COMPANIES; i++) {
      NWidgetCore *button = this->GetWidget<NWidgetCore>(i + WID_AID_COMPANY_BUTTON_START);
 
      bool valid = Company::IsValidAiID(i);
 
      /* Check whether the validity of the company changed */
      dirty |= (button->IsDisabled() == valid);
 
      /* Mark dead/paused AIs by setting the background colour. */
      bool dead = valid && Company::Get(i)->ai_instance->IsDead();
      bool paused = valid && Company::Get(i)->ai_instance->IsPaused();
      /* Re-paint if the button was updated.
       * (note that it is intentional that SetScriptButtonColour is always called) */
      dirty |= SetScriptButtonColour(*button, dead, paused);
 
      /* Draw company icon only for valid AI companies */
      if (!valid) continue;
 
      byte offset = (i == ai_debug_company) ? 1 : 0;
      DrawCompanyIcon(i, button->pos_x + button->current_x / 2 - 7 + offset, this->GetWidget<NWidgetBase>(WID_AID_COMPANY_BUTTON_START + i)->pos_y + 2 + offset);
    }
 
    /* Set button colour for Game Script. */
    GameInstance *game = Game::GetInstance();
    bool valid = game != nullptr;
    bool dead = valid && game->IsDead();
    bool paused = valid && game->IsPaused();
 
    NWidgetCore *button = this->GetWidget<NWidgetCore>(WID_AID_SCRIPT_GAME);
    dirty |= (button->IsDisabled() == valid) || SetScriptButtonColour(*button, dead, paused);
 
    if (dirty) this->InvalidateData(-1);
 
    /* If there are no active companies, don't display anything else. */
    if (ai_debug_company == INVALID_COMPANY) return;
 
    ScriptLog::LogData *log = this->GetLogPointer();
 
    int scroll_count = (log == nullptr) ? 0 : log->used;
    if (this->vscroll->GetCount() != scroll_count) {
      this->vscroll->SetCount(scroll_count);
 
      /* We need a repaint */
      this->SetWidgetDirty(WID_AID_SCROLLBAR);
    }
 
    if (log == nullptr) return;
 
    /* Detect when the user scrolls the window. Enable autoscroll when the
     * bottom-most line becomes visible. */
    if (this->last_vscroll_pos != this->vscroll->GetPosition()) {
      this->autoscroll = this->vscroll->GetPosition() >= log->used - this->vscroll->GetCapacity();
    }
    if (this->autoscroll) {
      int scroll_pos = std::max(0, log->used - this->vscroll->GetCapacity());
      if (scroll_pos != this->vscroll->GetPosition()) {
        this->vscroll->SetPosition(scroll_pos);
 
        /* We need a repaint */
        this->SetWidgetDirty(WID_AID_SCROLLBAR);
        this->SetWidgetDirty(WID_AID_LOG_PANEL);
      }
    }
    this->last_vscroll_pos = this->vscroll->GetPosition();
  }
 
  void SetStringParameters(int widget) const override
  {
    switch (widget) {
      case WID_AID_NAME_TEXT:
        if (ai_debug_company == OWNER_DEITY) {
          const GameInfo *info = Game::GetInfo();
          assert(info != nullptr);
          SetDParam(0, STR_AI_DEBUG_NAME_AND_VERSION);
          SetDParamStr(1, info->GetName());
          SetDParam(2, info->GetVersion());
        } else if (ai_debug_company == INVALID_COMPANY || !Company::IsValidAiID(ai_debug_company)) {
          SetDParam(0, STR_EMPTY);
        } else {
          const AIInfo *info = Company::Get(ai_debug_company)->ai_info;
          assert(info != nullptr);
          SetDParam(0, STR_AI_DEBUG_NAME_AND_VERSION);
          SetDParamStr(1, info->GetName());
          SetDParam(2, info->GetVersion());
        }
        break;
    }
  }
 
  void DrawWidget(const Rect &r, int widget) const override
  {
    if (ai_debug_company == INVALID_COMPANY) return;
 
    switch (widget) {
      case WID_AID_LOG_PANEL: {
        ScriptLog::LogData *log = this->GetLogPointer();
        if (log == nullptr) return;
 
        int y = this->top_offset;
        for (int i = this->vscroll->GetPosition(); this->vscroll->IsVisible(i) && i < log->used; i++) {
          int pos = (i + log->pos + 1 - log->used + log->count) % log->count;
          if (log->lines[pos] == nullptr) break;
 
          TextColour colour;
          switch (log->type[pos]) {
            case ScriptLog::LOG_SQ_INFO:  colour = TC_BLACK;  break;
            case ScriptLog::LOG_SQ_ERROR: colour = TC_RED;    break;
            case ScriptLog::LOG_INFO:     colour = TC_BLACK;  break;
            case ScriptLog::LOG_WARNING:  colour = TC_YELLOW; break;
            case ScriptLog::LOG_ERROR:    colour = TC_RED;    break;
            default:                  colour = TC_BLACK;  break;
          }
 
          /* Check if the current line should be highlighted */
          if (pos == this->highlight_row) {
            GfxFillRect(r.left + 1, r.top + y, r.right - 1, r.top + y + this->resize.step_height - WD_PAR_VSEP_NORMAL, PC_BLACK);
            if (colour == TC_BLACK) colour = TC_WHITE; // Make black text readable by inverting it to white.
          }
 
          DrawString(r.left + 7, r.right - 7, r.top + y, log->lines[pos], colour, SA_LEFT | SA_FORCE);
          y += this->resize.step_height;
        }
        break;
      }
    }
  }
 
  void ChangeToAI(CompanyID show_ai)
  {
    if (!this->IsValidDebugCompany(show_ai)) return;
 
    ai_debug_company = show_ai;
 
    this->highlight_row = -1; // The highlight of one AI make little sense for another AI.
 
    /* Close AI settings window to prevent confusion */
    CloseWindowByClass(WC_AI_SETTINGS);
 
    this->InvalidateData(-1);
 
    this->autoscroll = true;
    this->last_vscroll_pos = this->vscroll->GetPosition();
  }
 
  void OnClick(Point pt, int widget, int click_count) override
  {
    /* Also called for hotkeys, so check for disabledness */
    if (this->IsWidgetDisabled(widget)) return;
 
    /* Check which button is clicked */
    if (IsInsideMM(widget, WID_AID_COMPANY_BUTTON_START, WID_AID_COMPANY_BUTTON_END + 1)) {
      ChangeToAI((CompanyID)(widget - WID_AID_COMPANY_BUTTON_START));
    }
 
    switch (widget) {
      case WID_AID_SCRIPT_GAME:
        ChangeToAI(OWNER_DEITY);
        break;
 
      case WID_AID_RELOAD_TOGGLE:
        if (ai_debug_company == OWNER_DEITY) break;
        /* First kill the company of the AI, then start a new one. This should start the current AI again */
        Command<CMD_COMPANY_CTRL>::Post(CCA_DELETE, ai_debug_company, CRR_MANUAL, INVALID_CLIENT_ID);
        Command<CMD_COMPANY_CTRL>::Post(CCA_NEW_AI, ai_debug_company, CRR_NONE, INVALID_CLIENT_ID);
        break;
 
      case WID_AID_SETTINGS:
        ShowAISettingsWindow(ai_debug_company);
        break;
 
      case WID_AID_BREAK_STR_ON_OFF_BTN:
        this->break_check_enabled = !this->break_check_enabled;
        this->InvalidateData(-1);
        break;
 
      case WID_AID_MATCH_CASE_BTN:
        this->case_sensitive_break_check = !this->case_sensitive_break_check;
        this->InvalidateData(-1);
        break;
 
      case WID_AID_CONTINUE_BTN:
        /* Unpause current AI / game script and mark the corresponding script button dirty. */
        if (!this->IsDead()) {
          if (ai_debug_company == OWNER_DEITY) {
            Game::Unpause();
          } else {
            AI::Unpause(ai_debug_company);
          }
        }
 
        /* If the last AI/Game Script is unpaused, unpause the game too. */
        if ((_pause_mode & PM_PAUSED_NORMAL) == PM_PAUSED_NORMAL) {
          bool all_unpaused = !Game::IsPaused();
          if (all_unpaused) {
            for (const Company *c : Company::Iterate()) {
              if (c->is_ai && AI::IsPaused(c->index)) {
                all_unpaused = false;
                break;
              }
            }
            if (all_unpaused) {
              /* All scripts have been unpaused => unpause the game. */
              Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, false);
            }
          }
        }
 
        this->highlight_row = -1;
        this->InvalidateData(-1);
        break;
    }
  }
 
  void OnEditboxChanged(int wid) override
  {
    if (wid == WID_AID_BREAK_STR_EDIT_BOX) {
      /* Save the current string to static member so it can be restored next time the window is opened. */
      strecpy(this->break_string, this->break_editbox.text.buf, lastof(this->break_string));
      break_string_filter.SetFilterTerm(this->break_string);
    }
  }
 
  void OnInvalidateData(int data = 0, bool gui_scope = true) override
  {
    /* If the log message is related to the active company tab, check the break string.
     * This needs to be done in gameloop-scope, so the AI is suspended immediately. */
    if (!gui_scope && data == ai_debug_company && this->IsValidDebugCompany(ai_debug_company) && this->break_check_enabled && !this->break_string_filter.IsEmpty()) {
      /* Get the log instance of the active company */
      ScriptLog::LogData *log = this->GetLogPointer();
 
      if (log != nullptr) {
        this->break_string_filter.ResetState();
        this->break_string_filter.AddLine(log->lines[log->pos]);
        if (this->break_string_filter.GetState()) {
          /* Pause execution of script. */
          if (!this->IsDead()) {
            if (ai_debug_company == OWNER_DEITY) {
              Game::Pause();
            } else {
              AI::Pause(ai_debug_company);
            }
          }
 
          /* Pause the game. */
          if ((_pause_mode & PM_PAUSED_NORMAL) == PM_UNPAUSED) {
            Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
          }
 
          /* Highlight row that matched */
          this->highlight_row = log->pos;
        }
      }
    }
 
    if (!gui_scope) return;
 
    this->SelectValidDebugCompany();
 
    ScriptLog::LogData *log = ai_debug_company != INVALID_COMPANY ? this->GetLogPointer() : nullptr;
    this->vscroll->SetCount((log == nullptr) ? 0 : log->used);
 
    /* Update company buttons */
    for (CompanyID i = COMPANY_FIRST; i < MAX_COMPANIES; i++) {
      this->SetWidgetDisabledState(i + WID_AID_COMPANY_BUTTON_START, !Company::IsValidAiID(i));
      this->SetWidgetLoweredState(i + WID_AID_COMPANY_BUTTON_START, ai_debug_company == i);
    }
 
    this->SetWidgetDisabledState(WID_AID_SCRIPT_GAME, Game::GetGameInstance() == nullptr);
    this->SetWidgetLoweredState(WID_AID_SCRIPT_GAME, ai_debug_company == OWNER_DEITY);
 
    this->SetWidgetLoweredState(WID_AID_BREAK_STR_ON_OFF_BTN, this->break_check_enabled);
    this->SetWidgetLoweredState(WID_AID_MATCH_CASE_BTN, this->case_sensitive_break_check);
 
    this->SetWidgetDisabledState(WID_AID_SETTINGS, ai_debug_company == INVALID_COMPANY);
    extern CompanyID _local_company;
    this->SetWidgetDisabledState(WID_AID_RELOAD_TOGGLE, ai_debug_company == INVALID_COMPANY || ai_debug_company == OWNER_DEITY || ai_debug_company == _local_company);
    this->SetWidgetDisabledState(WID_AID_CONTINUE_BTN, ai_debug_company == INVALID_COMPANY ||
        (ai_debug_company == OWNER_DEITY ? !Game::IsPaused() : !AI::IsPaused(ai_debug_company)));
  }
 
  void OnResize() override
  {
    this->vscroll->SetCapacityFromWidget(this, WID_AID_LOG_PANEL);
  }
 
  static HotkeyList hotkeys;
};
 
const int AIDebugWindow::top_offset = WD_FRAMERECT_TOP + 2;
const int AIDebugWindow::bottom_offset = WD_FRAMERECT_BOTTOM;
CompanyID AIDebugWindow::ai_debug_company = INVALID_COMPANY;
char AIDebugWindow::break_string[MAX_BREAK_STR_STRING_LENGTH] = "";
bool AIDebugWindow::break_check_enabled = true;
bool AIDebugWindow::case_sensitive_break_check = false;
StringFilter AIDebugWindow::break_string_filter(&AIDebugWindow::case_sensitive_break_check);
 
NWidgetBase *MakeCompanyButtonRowsAIDebug(int *biggest_index)
{
  return MakeCompanyButtonRows(biggest_index, WID_AID_COMPANY_BUTTON_START, WID_AID_COMPANY_BUTTON_END, COLOUR_GREY, 8, STR_AI_DEBUG_SELECT_AI_TOOLTIP);
}
 
static EventState AIDebugGlobalHotkeys(int hotkey)
{
  if (_game_mode != GM_NORMAL) return ES_NOT_HANDLED;
  Window *w = ShowAIDebugWindow(INVALID_COMPANY);
  if (w == nullptr) return ES_NOT_HANDLED;
  return w->OnHotkey(hotkey);
}
 
static Hotkey aidebug_hotkeys[] = {
  Hotkey('1', "company_1", WID_AID_COMPANY_BUTTON_START),
  Hotkey('2', "company_2", WID_AID_COMPANY_BUTTON_START + 1),
  Hotkey('3', "company_3", WID_AID_COMPANY_BUTTON_START + 2),
  Hotkey('4', "company_4", WID_AID_COMPANY_BUTTON_START + 3),
  Hotkey('5', "company_5", WID_AID_COMPANY_BUTTON_START + 4),
  Hotkey('6', "company_6", WID_AID_COMPANY_BUTTON_START + 5),
  Hotkey('7', "company_7", WID_AID_COMPANY_BUTTON_START + 6),
  Hotkey('8', "company_8", WID_AID_COMPANY_BUTTON_START + 7),
  Hotkey('9', "company_9", WID_AID_COMPANY_BUTTON_START + 8),
  Hotkey((uint16)0, "company_10", WID_AID_COMPANY_BUTTON_START + 9),
  Hotkey((uint16)0, "company_11", WID_AID_COMPANY_BUTTON_START + 10),
  Hotkey((uint16)0, "company_12", WID_AID_COMPANY_BUTTON_START + 11),
  Hotkey((uint16)0, "company_13", WID_AID_COMPANY_BUTTON_START + 12),
  Hotkey((uint16)0, "company_14", WID_AID_COMPANY_BUTTON_START + 13),
  Hotkey((uint16)0, "company_15", WID_AID_COMPANY_BUTTON_START + 14),
  Hotkey('S', "settings", WID_AID_SETTINGS),
  Hotkey('0', "game_script", WID_AID_SCRIPT_GAME),
  Hotkey((uint16)0, "reload", WID_AID_RELOAD_TOGGLE),
  Hotkey('B', "break_toggle", WID_AID_BREAK_STR_ON_OFF_BTN),
  Hotkey('F', "break_string", WID_AID_BREAK_STR_EDIT_BOX),
  Hotkey('C', "match_case", WID_AID_MATCH_CASE_BTN),
  Hotkey(WKC_RETURN, "continue", WID_AID_CONTINUE_BTN),
  HOTKEY_LIST_END
};
HotkeyList AIDebugWindow::hotkeys("aidebug", aidebug_hotkeys, AIDebugGlobalHotkeys);
 
static const NWidgetPart _nested_ai_debug_widgets[] = {
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_CLOSEBOX, COLOUR_GREY),
    NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_AI_DEBUG, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
    NWidget(WWT_SHADEBOX, COLOUR_GREY),
    NWidget(WWT_DEFSIZEBOX, COLOUR_GREY),
    NWidget(WWT_STICKYBOX, COLOUR_GREY),
  EndContainer(),
  NWidget(WWT_PANEL, COLOUR_GREY, WID_AID_VIEW),
    NWidgetFunction(MakeCompanyButtonRowsAIDebug), SetPadding(0, 2, 1, 2),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AID_SCRIPT_GAME), SetMinimalSize(100, 20), SetResize(1, 0), SetDataTip(STR_AI_GAME_SCRIPT, STR_AI_GAME_SCRIPT_TOOLTIP),
    NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AID_NAME_TEXT), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_JUST_STRING, STR_AI_DEBUG_NAME_TOOLTIP),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_AID_SETTINGS), SetMinimalSize(100, 20), SetDataTip(STR_AI_DEBUG_SETTINGS, STR_AI_DEBUG_SETTINGS_TOOLTIP),
    NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_AID_RELOAD_TOGGLE), SetMinimalSize(100, 20), SetDataTip(STR_AI_DEBUG_RELOAD, STR_AI_DEBUG_RELOAD_TOOLTIP),
  EndContainer(),
  NWidget(NWID_HORIZONTAL),
    NWidget(NWID_VERTICAL),
      /* Log panel */
      NWidget(WWT_PANEL, COLOUR_GREY, WID_AID_LOG_PANEL), SetMinimalSize(287, 180), SetResize(1, 1), SetScrollbar(WID_AID_SCROLLBAR),
      EndContainer(),
      /* Break string widgets */
      NWidget(NWID_SELECTION, INVALID_COLOUR, WID_AID_BREAK_STRING_WIDGETS),
        NWidget(NWID_HORIZONTAL),
          NWidget(WWT_IMGBTN_2, COLOUR_GREY, WID_AID_BREAK_STR_ON_OFF_BTN), SetFill(0, 1), SetDataTip(SPR_FLAG_VEH_STOPPED, STR_AI_DEBUG_BREAK_STR_ON_OFF_TOOLTIP),
          NWidget(WWT_PANEL, COLOUR_GREY),
            NWidget(NWID_HORIZONTAL),
              NWidget(WWT_LABEL, COLOUR_GREY), SetPadding(2, 2, 2, 4), SetDataTip(STR_AI_DEBUG_BREAK_ON_LABEL, 0x0),
              NWidget(WWT_EDITBOX, COLOUR_GREY, WID_AID_BREAK_STR_EDIT_BOX), SetFill(1, 1), SetResize(1, 0), SetPadding(2, 2, 2, 2), SetDataTip(STR_AI_DEBUG_BREAK_STR_OSKTITLE, STR_AI_DEBUG_BREAK_STR_TOOLTIP),
            EndContainer(),
          EndContainer(),
          NWidget(WWT_TEXTBTN, COLOUR_GREY, WID_AID_MATCH_CASE_BTN), SetMinimalSize(100, 0), SetFill(0, 1), SetDataTip(STR_AI_DEBUG_MATCH_CASE, STR_AI_DEBUG_MATCH_CASE_TOOLTIP),
          NWidget(WWT_PUSHTXTBTN, COLOUR_GREY, WID_AID_CONTINUE_BTN), SetMinimalSize(100, 0), SetFill(0, 1), SetDataTip(STR_AI_DEBUG_CONTINUE, STR_AI_DEBUG_CONTINUE_TOOLTIP),
        EndContainer(),
      EndContainer(),
    EndContainer(),
    NWidget(NWID_VERTICAL),
      NWidget(NWID_VSCROLLBAR, COLOUR_GREY, WID_AID_SCROLLBAR),
      NWidget(WWT_RESIZEBOX, COLOUR_GREY),
    EndContainer(),
  EndContainer(),
};
 
static WindowDesc _ai_debug_desc(
  WDP_AUTO, "script_debug", 600, 450,
  WC_AI_DEBUG, WC_NONE,
  0,
  _nested_ai_debug_widgets, lengthof(_nested_ai_debug_widgets),
  &AIDebugWindow::hotkeys
);
 
Window *ShowAIDebugWindow(CompanyID show_company)
{
  if (!_networking || _network_server) {
    AIDebugWindow *w = (AIDebugWindow *)BringWindowToFrontById(WC_AI_DEBUG, 0);
    if (w == nullptr) w = new AIDebugWindow(&_ai_debug_desc, 0);
    if (show_company != INVALID_COMPANY) w->ChangeToAI(show_company);
    return w;
  } else {
    ShowErrorMessage(STR_ERROR_AI_DEBUG_SERVER_ONLY, INVALID_STRING_ID, WL_INFO);
  }
 
  return nullptr;
}
 
void InitializeAIGui()
{
  AIDebugWindow::ai_debug_company = INVALID_COMPANY;
}
 
void ShowAIDebugWindowIfAIError()
{
  /* Network clients can't debug AIs. */
  if (_networking && !_network_server) return;
 
  for (const Company *c : Company::Iterate()) {
    if (c->is_ai && c->ai_instance->IsDead()) {
      ShowAIDebugWindow(c->index);
      break;
    }
  }
 
  GameInstance *g = Game::GetGameInstance();
  if (g != nullptr && g->IsDead()) {
    ShowAIDebugWindow(OWNER_DEITY);
  }
}