using Godot;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml;

public partial class Cube : StaticBody2D, ITileDraggable
{
	private static readonly Rect2I tableRect = new(0, 0, 3, 2);
	private static readonly Rect2I table2Rect = new(0, -1, 3, 1);
	private static readonly Rect2I chairRect = new(1, 1, 1, 2);
	private static readonly Rect2I chair2Rect = new(1, -2, 1, 2);
	private static readonly Rect2I equipRect = new(0, 0, 3, 2);
	private static readonly Rect2I equip2Rect = new(0, -1, 3, 1);
	private static readonly TileMapping[] tableThemes = {
		new(new Vector2I(1, 30), tableRect),
		new(new Vector2I(4, 30), tableRect),
		new(new Vector2I(7, 30), tableRect),
		new(new Vector2I(7, 28), tableRect),
		new(new Vector2I(10, 28), tableRect),
	};
	private static readonly TileMapping[] table2Themes = {
		new(new Vector2I(1, 31), table2Rect),
		new(new Vector2I(4, 31), table2Rect),
		new(new Vector2I(7, 31), table2Rect),
		new(new Vector2I(7, 29), table2Rect),
		new(new Vector2I(10, 29), table2Rect),
	};
	private static readonly TileMapping[] chairThemes = {
		new(new Vector2I(-1, 7), chairRect),
		new(new Vector2I(0, 7), chairRect),
		new(new Vector2I(-1, 9), chairRect),
		new(new Vector2I(0, 9), chairRect),
	};
	private static readonly TileMapping[] chair2Themes = {
		new(new Vector2I(-1, 10), chair2Rect),
		new(new Vector2I(0, 10), chair2Rect),
		new(new Vector2I(-1, 12), chair2Rect),
		new(new Vector2I(0, 12), chair2Rect),
	};

	private static readonly TileMapping[] equipThemes = {
		// one laptop
		new(new Vector2I(13, 26), equipRect),
		// one laptop with one monitor
		new(new Vector2I(7, 26), equipRect),
		// one desktop PC
		new(new Dictionary<Vector2I, Vector2I>() {
			[new Vector2I(0, 0)] = new Vector2I(11, 17),
			[new Vector2I(1, 0)] = new Vector2I(8, 32),
			[new Vector2I(2, 0)] = new Vector2I(9, 32),
			[new Vector2I(0, 1)] = new Vector2I(11, 18),
			[new Vector2I(1, 1)] = new Vector2I(8, 33),
			[new Vector2I(2, 1)] = new Vector2I(9, 33),
		}),
		// one desktop PC with one monitors
		new(new Vector2I(7, 32), equipRect),
	};

	private static readonly TileMapping[] equip2Themes = {
		// one laptop
		new(new Vector2I(13, 31), equip2Rect),
		// one laptop with one monitor
		new(new Dictionary<Vector2I, Vector2I>() {
			[new Vector2I(0, -1)] = new Vector2I(13, 32),
			[new Vector2I(1, -1)] = new Vector2I(10, 7),
			[new Vector2I(2, -1)] = new Vector2I(15, 32),
		}),
		// one desktop PC
		new(new Dictionary<Vector2I, Vector2I>() {
			[new Vector2I(0, -1)] = new Vector2I(13, 32),
			[new Vector2I(1, -1)] = new Vector2I(14, 32),
			[new Vector2I(2, -1)] = new Vector2I(15, 30),
		}),
		// one desktop PC with one monitors
		new(new Vector2I(13, 33), equip2Rect),
	};

	private bool _draggable = false;
	public bool Draggable {
		get => _draggable;
		set {
			if (value == _draggable) return;
			_draggable = value;
		}
	}

	private readonly Guid _id = Guid.NewGuid();
	public Guid ID => _id;

    public Vector2I TilePosition { get; set; } = new Vector2I(5,5);
    private bool _isCollided = true;
	public bool IsCollided {
		get => _isCollided;
		set {
			if (_isCollided == value) return;
			_isCollided = value;
			if (value) {
				GetNode<Polygon2D>("RedBG").Show();
			} else {
				GetNode<Polygon2D>("RedBG").Hide();
			}
		}
	}
	private static readonly Rect2I _tileRect = new(-1, -2, 4, 5);
    public Rect2I TileRect => _tileRect;

	private Vector2I _mouseOffset;
    public Vector2I MouseOffset => _mouseOffset;

	private static readonly ITileDraggable.SpecialTile[] _specialTiles = {
		new(new Vector2I(1,-1), Lab.MapNodeType.SeatDown | Lab.MapNodeType.Walkable),
		new(new Vector2I(1,2), Lab.MapNodeType.SeatUp | Lab.MapNodeType.Walkable),
	};


    public ITileDraggable.SpecialTile[] SpecialTiles => _specialTiles;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready()
	{
		RandomChangeTheme();
		IsCollided = false;
	}

    public override void _InputEvent(Viewport viewport, InputEvent @event, int shapeIdx)
    {
		if (@event.IsActionPressed("mouse_left_press")) {
			if (Draggable) {
				var parent = GetParent<Lab>();
				parent.Pickup(this);
				var desk = GetNode<TileMapLayer>("Desk");
				_mouseOffset = desk.LocalToMap(GetLocalMousePosition());
				GD.Print($"_mouseOffset = {_mouseOffset}");
			}
		} else if (@event.IsActionReleased("mouse_left_press")) {
			if (_isCollided) return;
			var parent = GetParent<Lab>();
			parent.PutDown(this);
		}
        base._InputEvent(viewport, @event, shapeIdx);
    }

    // Called every frame. 'delta' is the elapsed time since the previous frame.
    public override void _Process(double delta)
	{
		GlobalPosition = TilePosition * 48;
	}

	private int tableThemeIdx;
	private int table2ThemeIdx;
	private int chairThemeIdx;
	private int chair2ThemeIdx;
	private int equipThemeIdx;
	private int equip2ThemeIdx;
	public void RandomChangeTheme() {
		tableThemeIdx = GD.RandRange(0, tableThemes.Length-1);
		chairThemeIdx = GD.RandRange(0, chairThemes.Length-1);
		equipThemeIdx = GD.RandRange(0, equipThemes.Length-1);

		table2ThemeIdx = GD.RandRange(0, table2Themes.Length-1);
		chair2ThemeIdx = GD.RandRange(0, chair2Themes.Length-1);
		equip2ThemeIdx = GD.RandRange(0, equip2Themes.Length-1);

		tableThemes[tableThemeIdx].Apply(GetNode<TileMapLayer>("Desk"));
		chairThemes[chairThemeIdx].Apply(GetNode<TileMapLayer>("Chair"));
		equipThemes[equipThemeIdx].Apply(GetNode<TileMapLayer>("Equip"));
		table2Themes[table2ThemeIdx].Apply(GetNode<TileMapLayer>("Desk2"));
		chair2Themes[chair2ThemeIdx].Apply(GetNode<TileMapLayer>("Chair2"));
		equip2Themes[equip2ThemeIdx].Apply(GetNode<TileMapLayer>("Equip2"));
	}
	private static readonly HashSet<Vector2I> blockerTiles = new(new Vector2I[]{
		new(0,0),
		new(1,0),
		new(2,0),
		new(0,1),
		new(1,1),
		new(2,1),
	});
    public Lab.MapNodeType GetTileType(Vector2I pos)
    {
		GD.Print($"query position of {pos}");
        if (blockerTiles.Contains(pos)) {
			return Lab.MapNodeType.Blocker;
		}
		if (_specialTiles.Any(t => t.Position == pos)) {
			return _specialTiles.First(t => t.Position == pos).NodeType;
		}
		return Lab.MapNodeType.Walkable;
    }

	public void ChairFaceTo(Vector2I target, int idx) {
		if (idx == 0) {
			var theme = chairThemes[chairThemeIdx];
			
		}
	}

}