extends Spatial

var side_wall: PackedScene = preload("res://objects/wall-side.scn")
var bottom_side: PackedScene = preload("res://objects/bottom-side.scn")
var bottom: PackedScene = preload("res://objects/bottom.scn")
var bottom_wheels: PackedScene = preload("res://objects/bottom-wheels.scn")
var entry: PackedScene = preload("res://objects/entry.scn")
var roof_floor: PackedScene = preload("res://objects/roof-floor.scn")
var roof_floor_range: PackedScene = preload("res://objects/roof-floor-range.scn")
var wall_internal:  PackedScene = preload("res://objects/wall-internal.scn")
var window_narrow: PackedScene = preload("res://objects/window-narrow.scn")
var window_wide: PackedScene = preload("res://objects/window-wide.scn")
var wall_solid: PackedScene = preload("res://objects/wall-solid.scn")
onready var rnd = RandomNumberGenerator.new()


# Declare member variables here. Examples:
# var a = 2
# var b = "text"


# Called when the node enters the scene tree for the first time.
var thread: Thread
func _ready():
	thread = Thread.new()
#	var parts = {
#		"side_wall": side_wall,
#		"bottom_side": bottom_side,
#		"bottom": bottom,
#		"bottom_wheels": bottom_wheels,
#		"entry": entry,
#		"roof_floor": roof_floor,
#		"roof_floor_range": roof_floor_range,
#		"wall_internal": wall_internal,
#		"window_narrow": window_narrow,
#		"window_wide": window_wide,
#		"wall_solid": wall_solid
#	}
#	for k in parts.keys():
#		Spawner.add_scene(k, parts[k])
func _exit_tree():
	if thread.is_active():
		thread.wait_to_finish()
func spawn_child(n, xform):
	add_child(n)
	n.transform = xform
func build_house(userdata):
	var s = int(global_transform.origin.x + 100 * global_transform.origin.z * 2) % 0x1ffffff
	rnd.seed = s
	print(global_transform.origin, " seed = ", s)
	var l = 6 + 2 * rnd.randi() % 7 - 1
	var h = l - 1
	var d = 3 + rnd.randi() % (l - 5 + 1)
	var range_used = false
	for k in range(l + 1):
		var pos = Vector3(0, 0, k * 2)
		if k > 0:
			if k != d && rnd.randf() > 0.5 && !range_used:
				var r = roof_floor_range.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", r, xform)
				range_used = true
			else:
				var r = roof_floor.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", r, xform)
			var what
			var xt = [Transform(Basis(), pos), Transform(Basis().rotated(Vector3.UP, PI), pos - Vector3(0, 0, 2))]
			for x in range(xt.size()):
				if x == 0 && k == d:
					continue
				if rnd.randf() > 0.5:
					what = wall_solid.instance()
				elif rnd.randf() > 0.5:
					what = window_narrow.instance()
				else:
					what = window_wide.instance()
				call_deferred("spawn_child", what, xt[x])

		if k > 1 && k < l && rnd.randf() > 0.6:
			var r = wall_internal.instance()
			var xform = Transform(Basis(), pos)
			call_deferred("spawn_child", r, xform)
		match k:
			0:
				var b = side_wall.instance()
				var c = bottom_side.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
				call_deferred("spawn_child", c, xform)
			1:
				var b = bottom.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
			2:
				var b = bottom_wheels.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
			d:
				var b = entry.instance()
				var c = bottom.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
				call_deferred("spawn_child", c, xform)
			h:
				var b = bottom_wheels.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
			l:
				var b = side_wall.instance()
				var c = bottom_side.instance()
				var a = bottom.instance()
				var xform = Transform(Basis().rotated(Vector3(0, 1, 0), PI), pos)
				var xform2 = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
				call_deferred("spawn_child", c, xform)
				call_deferred("spawn_child", a, xform2)
			_:
				var b = bottom.instance()
				var xform = Transform(Basis(), pos)
				call_deferred("spawn_child", b, xform)
# Called every frame. 'delta' is the elapsed time since the previous frame.
var state = 0
func _process(delta):
	match state:
		0:
			state = 1
		1:
			build_house(self)
			state = 2

var prev = 3000000
func _physics_process(delta):
	var cam = get_viewport().get_camera()
	var dst = cam.global_transform.origin.distance_to(global_transform.origin)
	match state:
		2:
			if abs(prev - dst) > 20:
				var space_state = get_viewport().get_world().direct_space_state
				var where = get_global_transform().origin
				var from = where
				var to = where
				from.y -= 8.0
				to.y += 8.0
				var result = space_state.intersect_ray(from, to)
				if result.empty() || !result.has("collider"):
					return
				else:
					global_transform.origin = result.position
				prev = dst