using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using Dalamud.Interface.Textures.TextureWraps;
using FFXIVClientStructs.FFXIV.Client.UI.Agent;
using KamiLib.Configuration;
using Lumina.Excel.Sheets;
using Mappy.Classes.SelectionWindowComponents;

namespace Mappy.Data;

public unsafe record MapNote(uint Territory, uint Map, float X, float Y, string Title, string Description)
{
    public IDalamudTextureWrap? GetMapTexture() => MapDrawableOption.GetMapTexture(Map);

    public Map GetMap() => Service.DataManager.GetExcelSheet<Map>().GetRow(Map);

    public TerritoryType GetTerritoryType() => Service.DataManager.GetExcelSheet<TerritoryType>().GetRow(Territory);

    public string GetIdString() => $"{Territory}_{Map}_{X}_{Y}_{Title.GetHashCode()}";

    /// <summary>Tooltip text for map/minimap: Title with Description on second line if present.</summary>
    public string GetTooltipText()
    {
        var t = Title ?? "";
        var d = Description ?? "";
        return string.IsNullOrWhiteSpace(d) ? t : $"{t}\n{d}";
    }

    public Vector2 GetCoordinate() => new(X, Y);

    /// <summary>Returns the stored map coordinates for display (same space as Place Note/Flag).</summary>
    public Vector2 GetMapCoordinate() => new(X, Y);

    public void Focus()
    {
        System.SystemConfig.FollowPlayer = false;
        System.IntegrationsController.OpenMap(Map);
        System.MapRenderer.CenterOnCoordinate(GetCoordinate());
    }
}

public class MapNoteConfig
{
    public List<MapNote> Notes { get; set; } = [];

    public int MaxNotes { get; set; } = 100;

    public static MapNoteConfig Load() => Service.PluginInterface.LoadConfigFile<MapNoteConfig>("MapNotes.data.json");

    public void Save() => Service.PluginInterface.SaveConfigFile("MapNotes.data.json", System.MapNoteConfig);

    /// <summary>Finds a note at or near the given map coordinates (same space as Place Note).</summary>
    /// <param name="threshold">Distance in map coordinate space; typical icon is ~200–500 units, so 500 covers right-clicks on the icon.</param>
    public MapNote? FindNoteAt(uint territoryId, uint mapId, float x, float y, float threshold = 500f)
    {
        MapNote? closest = null;
        var minDistSq = threshold * threshold;
        foreach (var n in Notes.Where(n => n.Territory == territoryId && n.Map == mapId)) {
            var dx = x - n.X;
            var dy = y - n.Y;
            var distSq = dx * dx + dy * dy;
            if (distSq < minDistSq) {
                minDistSq = distSq;
                closest = n;
            }
        }
        return closest;
    }
}