extends Node3D

@onready var ground = $Ground
@onready var camera =$Camera
@onready var highlighter = $Highlighter

var highlight = {}
var selection = {}

func _ready():
	highlight = reset_highlight()
	selection = reset_highlight()

func _process(delta):
	if Input.is_action_just_pressed("alt_command"):
		if highlight.type == "pawn":
			selection = highlight
		else:
			selection = reset_highlight()
			var entity = Global.world.add_entity("BaseUnit", Vector2i(highlight.grid_position.x, highlight.grid_position.y))
	if Input.is_action_just_pressed("main_command"):
		if selection.type == "pawn":
			if selection.entity is Unit:
				selection.entity.walk_to(Global.world.get_real_coordinates(Vector2i(round(highlight.data.position.x), round(highlight.data.position.z))))
func _unhandled_input(event):
	if event is InputEventMouseMotion:
		if highlight != get_highlight():
			if highlight.type == "pawn":
				highlight.pawn.unhighlight()
			highlight = get_highlight()
			if highlight.type == "case":
				highlighter.transparency = 0.0
				var sprite_position = Vector3((highlight.board_position.x), (highlight.board_position.y), (highlight.board_position.z)) + Vector3(0, 0.05, 0)
				highlighter.position = sprite_position
			else:
				highlighter.transparency = 1.0
			if highlight.type == "pawn":
				highlight.pawn.highlight()
			

func get_highlight():
	var result = reset_highlight()
	var mouse_pos = get_viewport().get_mouse_position()
	var ray_length = 1000
	var from = camera.project_ray_origin(mouse_pos)
	var to = from + camera.project_ray_normal(mouse_pos) * ray_length
	var space = get_world_3d().direct_space_state
	var ray_query = PhysicsRayQueryParameters3D.new()
	ray_query.from = from
	ray_query.to = to
	ray_query.collide_with_areas = true
	var raycast_result = space.intersect_ray(ray_query)
	if raycast_result:
		var collider = raycast_result.collider
		if "Chunk" in raycast_result.collider.name or "Ocean" in raycast_result.collider.name:
			var position = round(raycast_result.position)
			position.y = Global.world.get_height(Vector2i(position.x, position.z))
			if "Ocean" in raycast_result.collider.name:
				position.y += ground.WATER_HEIGHT
			result["type"] = "case"
			result["board_position"] = position
			result["grid_position"] = Global.world.get_real_coordinates(Vector2i(position.x, position.z))
			result["data"] = Global.world.get_bloc(result["grid_position"])
		elif "id" in raycast_result.collider:
			result["type"] = "pawn"
			result["pawn"] = raycast_result.collider
			result["entity"] = Global.world.entities[raycast_result.collider.id]
	return result

func reset_highlight():
	return {
		"type": null,
		"data": null
	}