using System.Collections.Generic;
using Server.Engines.MLQuests.Objectives;
using Server.Engines.MLQuests.Rewards;
using Server.Gumps;
using Server.Mobiles;

namespace Server.Engines.MLQuests.Gumps
{
  public enum ButtonPosition : byte
  {
    Left,
    Right
  }

  public enum ButtonGraphic : ushort
  {
    Invalid,
    Accept = 0x2EE0,
    Clear = 0x2EE3,
    Close = 0x2EE6,
    Continue = 0x2EE9,
    Okay = 0x2EEC,
    Previous = 0x2EEF,
    Refuse = 0x2EF2,
    Resign = 0x2EF5
  }

  public abstract class BaseQuestGump : Gump
  {
    private struct ButtonInfo
    {
      public ButtonPosition Position { get; }

      public ButtonGraphic Graphic { get; }

      public int ButtonID { get; }

      public ButtonInfo(ButtonPosition position, ButtonGraphic graphic, int buttonID)
      {
        Position = position;
        Graphic = graphic;
        ButtonID = buttonID;
      }
    }

    private int m_Page;
    private int m_MaxPages;
    private int m_Label;
    private string m_Title;
    private readonly List<ButtonInfo> m_Buttons;

    // RunUO optimized version
    public BaseQuestGump(int label)
      : base(75, 25)
    {
      m_Page = 0;
      m_MaxPages = 0;
      m_Label = label;
      m_Title = null;
      m_Buttons = new List<ButtonInfo>(2);

      Closable = false;

      AddPage(0);

      AddImageTiled(50, 20, 400, 460, 0x1404);
      AddImageTiled(50, 29, 30, 450, 0x28DC);
      AddImageTiled(34, 140, 17, 339, 0x242F);
      AddImage(48, 135, 0x28AB);
      AddImage(-16, 285, 0x28A2);
      AddImage(0, 10, 0x28B5);
      AddImage(25, 0, 0x28B4);
      AddImageTiled(83, 15, 350, 15, 0x280A);
      AddImage(34, 479, 0x2842);
      AddImage(442, 479, 0x2840);
      AddImageTiled(51, 479, 392, 17, 0x2775);
      AddImageTiled(415, 29, 44, 450, 0xA2D);
      AddImageTiled(415, 29, 30, 450, 0x28DC);
      // AddLabel( 100, 50, 0x481, "" );
      AddImage(370, 50, 0x589);
      AddImage(379, 60, 0x15A9);
      AddImage(425, 0, 0x28C9);
      AddImage(90, 33, 0x232D);
      AddHtmlLocalized(130, 45, 270, 16, label, 0xFFFFFF);
      AddImageTiled(130, 65, 175, 1, 0x238D);
    }

    public void BuildPage()
    {
      AddPage(++m_Page);

      if (m_Page > 1)
        AddButton(130, 430, (int)ButtonGraphic.Previous, (int)ButtonGraphic.Previous + 2, 0, GumpButtonType.Page,
          m_Page - 1);

      if (m_Page < m_MaxPages)
        AddButton(275, 430, (int)ButtonGraphic.Continue, (int)ButtonGraphic.Continue + 2, 0, GumpButtonType.Page,
          m_Page + 1);

      foreach (ButtonInfo button in m_Buttons)
        AddButton(button.Position == ButtonPosition.Left ? 95 : 313, 455, (int)button.Graphic,
          (int)button.Graphic + 2, button.ButtonID);

      if (m_Title != null)
        AddHtmlLocalized(130, 68, 220, 48, 1114513, m_Title, 0x2710); // <DIV ALIGN=CENTER>~1_TOKEN~</DIV>
    }

    public void SetPageCount(int maxPages)
    {
      m_MaxPages = maxPages;
    }

    public void SetTitle(TextDefinition def)
    {
      if (def.Number > 0)
        m_Title = $"#{def.Number}"; // OSI does "@@#{0}" instead, why? KR client related?
      else
        m_Title = def.String;
    }

    public void RegisterButton(ButtonPosition position, ButtonGraphic graphic, int buttonID)
    {
      m_Buttons.Add(new ButtonInfo(position, graphic, buttonID));
    }

    public void AddDescription(MLQuest quest)
    {
      AddHtmlLocalized(98, 140, 312, 16, quest.IsChainTriggered || quest.NextQuest != null ? 1075024 : 1072202, 0x2710); // Description [(quest chain)]
      TextDefinition.AddHtmlText(this, 98, 156, 312, 240, quest.Description, false, true, 0x15F90, 0xBDE784);
    }

    public void AddObjectives(MLQuest quest)
    {
      AddHtmlLocalized(98, 140, 312, 16, 1049073, 0x2710); // Objective:
      AddHtmlLocalized(98, 156, 312, 16, quest.ObjectiveType == ObjectiveType.All ? 1072208 : 1072209, 0x2710); // All of the following / Only one of the following

      int y = 172;

      foreach (BaseObjective objective in quest.Objectives)
      {
        objective.WriteToGump(this, ref y);

        if (objective.IsTimed)
        {
          if (objective is CollectObjective)
            y -= 16;

          BaseObjectiveInstance.WriteTimeRemaining(this, ref y, objective.Duration);
        }
      }
    }

    public void AddObjectivesProgress(MLQuestInstance instance)
    {
      MLQuest quest = instance.Quest;

      AddHtmlLocalized(98, 140, 312, 16, 1049073, 0x2710); // Objective:
      AddHtmlLocalized(98, 156, 312, 16, quest.ObjectiveType == ObjectiveType.All ? 1072208 : 1072209, 0x2710); // All of the following / Only one of the following

      int y = 172;

      foreach (BaseObjectiveInstance objInstance in instance.Objectives)
        objInstance.WriteToGump(this, ref y);
    }

    public void AddRewardsPage(MLQuest quest) // For the quest log/offer gumps
    {
      AddHtmlLocalized(98, 140, 312, 16, 1072201, 0x2710); // Reward

      int y = 162;

      if (quest.Rewards.Count > 1)
      {
        // TODO: Is this what this is for? Does "Only one of the following" occur?
        AddHtmlLocalized(98, 156, 312, 16, 1072208, 0x2710); // All of the following
        y += 16;
      }

      AddRewards(quest, 105, y, 16);
    }

    public void AddRewards(MLQuest quest) // For the claim rewards gump
    {
      int y = 146;

      if (quest.Rewards.Count > 1)
      {
        // TODO: Is this what this is for? Does "Only one of the following" occur?
        AddHtmlLocalized(100, 140, 312, 16, 1072208, 0x2710); // All of the following
        y += 16;
      }

      AddRewards(quest, 107, y, 26);
    }

    public void AddRewards(MLQuest quest, int x, int y, int spacing)
    {
      int xReward = x + 28;

      foreach (BaseReward reward in quest.Rewards)
      {
        AddImage(x, y + 1, 0x4B9);
        reward.WriteToGump(this, xReward, ref y);
        y += spacing;
      }
    }

    public void AddConversation(TextDefinition text)
    {
      TextDefinition.AddHtmlText(this, 98, 140, 312, 180, text, false, true, 0x15F90, 0xBDE784);
    }

    /* OSI gump IDs:
     * 800 - QuestOfferGump
     * 801 - QuestCancelConfirmGump
     * 802 - ?? (gets closed by Toggle Quest Item)
     * 803 - QuestRewardGump
     * 804 - ?? (gets closed by Toggle Quest Item)
     * 805 - QuestLogGump
     * 806 - QuestConversationGump (refuse / in progress)
     * 807 - ?? (gets closed by Toggle Quest Item and most quest gumps)
     * 808 - InfoNPCGump
     * 809 - QuestLogDetailedGump
     * 810 - QuestReportBackGump
     */
    public static void CloseOtherGumps(PlayerMobile pm)
    {
      pm.CloseGump<InfoNPCGump>();
      pm.CloseGump<QuestRewardGump>();
      pm.CloseGump<QuestConversationGump>();
      pm.CloseGump<QuestReportBackGump>();
      // pm.CloseGump( typeof( UnknownGump807 ) );
      pm.CloseGump<QuestCancelConfirmGump>();
    }
  }
}