using System.Collections.Immutable;
using System.Drawing;
using System.Linq;
using System.Numerics;
using Dalamud.Bindings.ImGui;
using Dalamud.Interface;
using Dalamud.Interface.Utility;
using Dalamud.Interface.Utility.Raii;
using FFXIVClientStructs.FFXIV.Client.UI.Agent;
using KamiLib.Window;
using Mappy.Data;

namespace Mappy.Windows;

public class MapNoteListWindow : Window
{
    private static float NoteElementHeight => 95.0f * ImGuiHelpers.GlobalScale;

    public MapNoteListWindow() : base("HSMappy Note List Window", new Vector2(400.0f, 400.0f))
    {
        AdditionalInfoTooltip = "Shows user-placed map notes for the current map";
    }

    protected override unsafe void DrawContents()
    {
        var agent = AgentMap.Instance();
        var territoryId = agent->SelectedTerritoryId;
        var mapId = agent->SelectedMapId;
        var notesForMap = System.MapNoteConfig.Notes
            .Where(n => n.Territory == territoryId && n.Map == mapId)
            .ToImmutableList();

        ImGuiClip.ClippedDraw(notesForMap, DrawNote, NoteElementHeight);
    }

    private void DrawNote(MapNote note)
    {
        using var id = ImRaii.PushId(note.GetIdString());

        using (ImRaii.Child("note_container", new Vector2(ImGui.GetContentRegionAvail().X, NoteElementHeight - ImGui.GetStyle().FramePadding.Y * 2.0f))) {
            using (ImRaii.Child("note_image_container", new Vector2(155.0f * ImGuiHelpers.GlobalScale, ImGui.GetContentRegionAvail().Y))) {
                DrawNoteImage(note);
            }

            ImGui.SameLine();

            using (ImRaii.Child("note_contents_container", ImGui.GetContentRegionAvail())) {
                var buttonHeight = 28f * ImGuiHelpers.GlobalScale;
                var textHeight = ImGui.GetContentRegionAvail().Y - buttonHeight;
                using (ImRaii.Child("note_text_area", new Vector2(ImGui.GetContentRegionAvail().X, textHeight))) {
                    DrawNoteData(note);
                }
                DrawButtons(note);
            }
        }

        ImGui.Spacing();
    }

    private void DrawNoteImage(MapNote note)
    {
        var texture = note.GetMapTexture();
        if (texture is not null) {
            ImGui.Image(texture.Handle, ImGui.GetContentRegionAvail(), new Vector2(0.15f, 0.15f), new Vector2(0.85f, 0.85f));
        }
        else {
            ImGuiHelpers.ScaledDummy(ImGui.GetContentRegionAvail());
        }
    }

    private void DrawNoteData(MapNote note)
    {
        ImGui.TextUnformatted(note.Title ?? "");
        if (!string.IsNullOrWhiteSpace(note.Description)) {
            ImGui.TextColored(KnownColor.Gray.Vector().Lighten(0.20f), note.Description);
        }

        ImGui.TextColored(KnownColor.Gray.Vector().Lighten(0.20f), note.GetMap().PlaceName.Value.Name.ExtractText());

        var coord = note.GetMapCoordinate();
        var zoneName = note.GetTerritoryType().PlaceNameZone.Value.Name.ExtractText();
        ImGui.TextColored(KnownColor.Gray.Vector(), $"{zoneName}  •  {coord.X:F1}, {coord.Y:F1}");
    }

    private void DrawButtons(MapNote note)
    {
        var buttonSize = ImGuiHelpers.ScaledVector2(80.0f, 24.0f);

        ImGui.SetCursorPos(new Vector2(0.0f, ImGui.GetContentRegionMax().Y - buttonSize.Y));
        if (ImGui.Button("Focus", buttonSize)) {
            note.Focus();
        }

        ImGui.SameLine();
        if (ImGui.Button("Remove", buttonSize)) {
            System.MapNoteConfig.Notes.Remove(note);
            System.MapNoteConfig.Save();
        }
    }

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