## MapData.gd
# Resource class that stores all data for a generated map, including tile types, rooms, and spawn points.
class_name MapData
extends Resource

# Enum for all possible tile types in the map grid.
# Used to distinguish between empty space, walkable floor, walls, doors, and stairs.
enum TileType {
	VOID,   # Unused/empty space
	FLOOR,  # Walkable floor tile
	WALL,   # Solid wall tile
	DOOR,   # Door tile (can be opened/closed)
	STAIRS  # Stairs tile (for level transitions)
}

# The main grid: Dictionary mapping Vector2i coordinates to TileType values.
# This is the authoritative source for the map's layout.
@export var grid: Dictionary = {}

# The number of rooms generated for this map (set during generation).
@export var room_count: int = 0

# List of all room rectangles (Rect2i) in the map, used for spawning and logic.
@export var rooms: Array[Rect2i] = []

# The starting position for the player (in grid coordinates).
@export var spawn_point: Vector2i = Vector2i.ZERO

# Returns true if the tile at 'coords' is of the given TileType.
# Used for pathfinding and logic checks.
func is_tile_type(coords: Vector2i, type: TileType) -> bool:
	return grid.get(coords, TileType.VOID) == type

# Clears all map data so this resource can be reused for a new map.
func clear() -> void:
	grid.clear()
	rooms.clear()
	room_count = 0
	spawn_point = Vector2i.ZERO
