extends Node

signal player_moved(track_offset)
signal lap_completed(laps)
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
onready var track = TrackSelection.get_current_track()
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():
	_reset_progress()

func _reset_progress():
	laps = 0
	current_cell = track[0]

func _input(event):
	# 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
					emit_signal("lap_completed", laps)
				# 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))