using System;
using System.Drawing;
using System.Linq;
using System.Numerics;
using Dalamud.Bindings.ImGui;
using Dalamud.Game.Text;
using Dalamud.Interface;
using Dalamud.Interface.Textures;
using Dalamud.Interface.Utility;
using Dalamud.Interface.Utility.Raii;
using FFXIVClientStructs.FFXIV.Client.Game.Fate;
using FFXIVClientStructs.FFXIV.Client.UI.Agent;
using KamiLib.Extensions;
using KamiLib.Window;
using Mappy.Data;
using Mappy.Extensions;

namespace Mappy.Windows;

public class FateListWindow : Window
{
    private const float ElementHeight = 48.0f;

    public FateListWindow() : base("HSMappy Fate List Window", new Vector2(300.0f, 400.0f))
    {
        AdditionalInfoTooltip = "Shows Fates for the zone you are currently in";
    }

    protected override unsafe void DrawContents()
    {
        DrawBackgroundImage();

        if (Service.FateTable.Length > 0) {
            DrawOptions();

            foreach (var index in Enumerable.Range(0, Service.FateTable.Length)) {
                var fate = FateManager.Instance()->Fates[index].Value;

                var cursorStart = ImGui.GetCursorScreenPos();
                if (ImGui.Selectable($"##{fate->FateId}_Selectable", false, ImGuiSelectableFlags.None,
                    new Vector2(ImGui.GetContentRegionAvail().X, ElementHeight * ImGuiHelpers.GlobalScale))) {
                    OnFateClick(fate);
                }

                ImGui.SetCursorScreenPos(cursorStart);
                DrawFateInfo(fate);
            }
        }
        else {
            const string text = "No FATE's available";
            var textSize = ImGui.CalcTextSize(text);
            ImGui.SetCursorPosX(ImGui.GetContentRegionAvail().X / 2.0f - textSize.X / 2.0f);
            ImGui.SetCursorPosY(ImGui.GetContentRegionAvail().Y / 2.0f - textSize.Y / 2.0f);
            ImGui.TextColored(KnownColor.Orange.Vector(), text);
        }
    }

    private static void DrawBackgroundImage()
    {
        var windowCursorStart = ImGui.GetCursorPos();
        var windowWidth = ImGui.GetContentRegionMax().X;
        var windowHeight = ImGui.GetContentRegionMax().Y;

        var startPos = windowHeight / 2 - windowWidth / 2;
        ImGui.SetCursorPosY(startPos);
        ImGui.Spacing();

        ImGui.Image(
            Service.TextureProvider.GetFromGameIcon(new GameIconLookup { IconId = 60502 }).GetWrapOrEmpty().Handle,
            new Vector2(ImGui.GetContentRegionMax().X, ImGui.GetContentRegionMax().X),
            Vector2.Zero,
            Vector2.One,
            new Vector4(1.0f, 1.0f, 1.0f, 0.15f));

        ImGui.SetCursorPos(windowCursorStart);
    }

    private static void DrawOptions()
    {
        using var toolbarChild = ImRaii.Child("fatelist_toolbar", new Vector2(ImGui.GetContentRegionAvail().X, 32.0f));
        if (toolbarChild) {
            using var color = ImRaii.PushColor(ImGuiCol.Button, ImGui.GetStyle().GetColor(ImGuiCol.ButtonActive), System.SystemConfig.SetFlagOnFateClick);
            ImGui.Spacing();
            if (ImGui.Checkbox("Place Map Flag on Click", ref System.SystemConfig.SetFlagOnFateClick)) {
                SystemConfig.Save();
            }
        }

        ImGui.Separator();
    }

    private static unsafe void OnFateClick(FateContext* fate)
    {
        System.IntegrationsController.OpenOccupiedMap();
        System.SystemConfig.FollowPlayer = false;
        System.MapRenderer.DrawOffset = -new Vector2(fate->Location.X, fate->Location.Z);

        if (System.SystemConfig.SetFlagOnFateClick) {
            AgentMap.Instance()->FlagMarkerCount = 0;
            AgentMap.Instance()->SetFlagMapMarker(AgentMap.Instance()->CurrentTerritoryId, AgentMap.Instance()->CurrentMapId, fate->Location.X, fate->Location.Z);
            AgentChatLog.Instance()->InsertTextCommandParam(1048, false);
        }
    }

    private static unsafe void DrawFateInfo(FateContext* fate)
    {
        using (ImRaii.Child($"image_child_{fate->FateId}", new Vector2(ElementHeight, ElementHeight), false, ImGuiWindowFlags.NoInputs)) {
            ImGui.Image(Service.TextureProvider.GetFromGameIcon(fate->IconId).GetWrapOrEmpty().Handle, ImGuiHelpers.ScaledVector2(ElementHeight, ElementHeight));
        }

        ImGui.SameLine();

        using (ImRaii.Child($"text_child_{fate->FateId}", new Vector2(ImGui.GetContentRegionAvail().X, ElementHeight), false, ImGuiWindowFlags.NoInputs)) {
            ImGui.TextColored(FateContextExtensions.GetColor(fate, 1.0f), $"Lv. {fate->Level} {fate->Name}");

            if (fate->State is FateState.Running) {
                ImGui.TextUnformatted($"Progress: {fate->Progress}%");

                var timeRemaining = FateContextExtensions.GetTimeRemaining(fate);
                if (timeRemaining != TimeSpan.Zero) {
                    var timeString = $"{(fate->IsBonus ? "Exp Bonus!\t" : string.Empty)}{SeIconChar.Clock.ToIconString()} {FateContextExtensions.GetTimeRemaining(fate):mm\\:ss}";
                    ImGui.SameLine(ImGui.GetContentRegionMax().X - ImGui.CalcTextSize(timeString).X);
                    ImGui.Text(timeString);
                }
            }
            else {
                ImGui.TextUnformatted(fate->State.ToString());
            }
        }
    }

    public override void OnClose()
    {
        System.WindowManager.RemoveWindow(this);
    }
}