extends Node

signal player_moved(track_offset)
signal wrong_way(coords)

# TODO:
# - Find a mean to import tracks (arrays of cell coordinates).
# ( - Autopopulate the map according to track data )
# - Build the track Curve2D from track and tiles data
# - Keyboard controls !!

var laps
var current_cell
var track = null
onready var map = $TileMap

func get_track_offset(coords):
	var offset = float(track.find(coords)) / float(len(track))
	return offset

# Called when the node enters the scene tree for the first time.
func _ready():
	TrackSelection.connect("track_changed", self, "_reset_state")
	_reset_state()

func _reset_state():
	track = TrackSelection.get_current_track()
	laps = 0
	current_cell = track[0]


func _input(event):
	if not Global.race_started:
		return -1
	# Check if the mouse if following the tiles track
	if event is InputEventMouseMotion:
		var hover_cell = map.world_to_map(event.position)
		if hover_cell != current_cell:  # The mouse moved to a new cell
			# Check the tile is on path
			if track.find(hover_cell) != -1:
				# Check if a lap is finished
				if hover_cell == track[0] and current_cell == track[-1]:
					laps += 1
				# Check we are following the path
				if track[track.find(hover_cell) - 1] == current_cell:
					emit_signal("player_moved", laps + get_track_offset(hover_cell))
					emit_signal("wrong_way", Vector2(-1, -1))
					current_cell = hover_cell
				else:
					emit_signal("wrong_way", map.map_to_world(hover_cell))

func _on_Menu_track_changed():
	print("Options clicked")
	TrackSelection.set_next_track()
	_reset_state()
	$TileMap._reset()
	$TrackPath._reset()