tool
extends Node2D

class_name GameMap

var ship_direction = 0
var ship_speed = 0

var current_ship_position = Vector2.ZERO
var current_ship_target = Vector2.ZERO

var current_ship_direction = 0
var current_ship_speed = 0

const SPEED_EASE = 0.5
const DIRECTION_EASE = 0.5
const EPSILON = 0.01

const ProbeElectricity = preload("res://Actors/Systems/Electricity/ElectricProbe.tscn")

onready var tilemaps = [ $base, $cables, $floor, $walls ]

onready var pois = $pois

export var unlit = false setget set_unlit
onready var darkness = $darkness

export var shadow_intensity = 0.2

func _ready():
	if Engine.editor_hint:
		return
	$editor.queue_free()
	set_unlit(false)
	
	if not is_network_master():
		return

	# Run autotile conversions and generate occlusions
	$walls.run_conversions()

	# Electricity setup
	make_electric_probes($cables, "Wire")

func _process(delta: float):
	if Engine.editor_hint:
		return

	# Ease ship speed/direction changes
	if abs(ship_direction - current_ship_direction) < EPSILON:
		current_ship_direction = ship_direction
	else:
		current_ship_direction = lerp(current_ship_direction, ship_direction, delta * DIRECTION_EASE)
	if abs(ship_speed - current_ship_speed) < EPSILON:
		current_ship_speed = ship_speed
	else:
		current_ship_speed = lerp(current_ship_speed, ship_speed, delta * SPEED_EASE)
		set_engine_strength(current_ship_speed)
	$deepspace.rotation = current_ship_direction-PI/2
	$deepspace.region_rect.position += Vector2(sin(current_ship_direction), cos(current_ship_direction)) * current_ship_speed * delta

# Serialization / Deserialization

func serialize() -> Dictionary:
	# Get tilemap data
	var tilemapdata = {}
	for tilemap in tilemaps:
		var data = []
		for cell in tilemap.get_used_cells():
			data.append([cell, tilemap.get_cellv(cell)])
		tilemapdata[tilemap.name] = data

	# Get objects
	var engines = serialize_children($engines)
	var objects = serialize_children($objects)
	var lights = serialize_children($lights)
	var sockets = serialize_children($sockets)
	var pois = serialize_children($pois)
	return {
		"tilemaps": tilemapdata,
		"engines": engines,
		"objects": objects,
		"lights": lights,
		"sockets": sockets,
		"pois": pois
	}

func deserialize(data: Dictionary) -> void:
	for tilemap in data["tilemaps"]:
		var tilemap_node = get_node(tilemap) as TileMap
		for tile in data["tilemaps"][tilemap]:
			tilemap_node.set_cellv(tile[0], tile[1])
		tilemap_node.update_bitmask_region()
		tilemap_node.update_dirty_quadrants()
	deserialize_children($engines, data["engines"])
	deserialize_children($objects, data["objects"])
	deserialize_children($lights, data["lights"])
	deserialize_children($pois, data["pois"])
	deserialize_children($sockets, data["sockets"])

	# Run autotile conversions and generate occlusions
	$walls.run_conversions()

func serialize_children(node: Node) -> Dictionary:
	var data = {}
	for child in node.get_children():
		data[child.name] = {
			"filename": child.filename,
			"data": child.serialize(),
			"transform": child.transform
		}
	return data

func deserialize_children(node: Node, data: Dictionary) -> void:
	for node_name in data:
		var node_data = data[node_name] as Dictionary
		var node_scene = load(node_data.filename).instance()
		node_scene.name = node_name
		node_scene.transform = node_data.transform
		node.add_child(node_scene, true)
		node_scene.deserialize(node_data.data)

# Lighting

func set_unlit(val: bool):
	unlit = val
	if darkness:
		darkness.visible = not val

# Engine related functions

func set_engine_strength(val: float):
	# Set energy strength to current speed
	for child in $engines.get_children():
		if child is GameObjectEngine:
			var engine = child as GameObjectEngine
			engine.strength = val

# Tileset related functions

func make_electric_probes(tilemap: TileMap, tile_name: String):
	var tile_id = tilemap.tile_set.find_tile_by_name(tile_name)
	for cell in tilemap.get_used_cells_by_id(tile_id):
		var coord = tilemap.map_to_world(cell)
		var probe = ProbeElectricity.instance()
		probe.position = coord
		tilemap.add_child(probe)

func get_pois(type_filter, class_filter) -> Array:
	var filtered = []
	for child in $pois.get_children():
		if type_filter != null and child.poitype != type_filter:
			continue
		if class_filter != null and child.poiclass != class_filter:
			continue
		filtered.append(child)
	return filtered