extends Node3D

var _camera: Camera3D
var _light: DirectionalLight3D
var _table: MeshInstance3D
var _cards: Array[Node3D] = []
var _flipping := false


func _ready() -> void:
	_camera = Camera3D.new()
	_camera.position = Vector3(0, 9, 5.5)
	_camera.look_at(Vector3(0, 0, -0.5), Vector3.UP)
	_camera.current = true
	add_child(_camera)

	_light = DirectionalLight3D.new()
	_light.position = Vector3(2, 8, 2)
	_light.look_at(Vector3.ZERO, Vector3.UP)
	_light.light_color = Color("ffe8cc")
	_light.shadow_enabled = true
	add_child(_light)

	var ambient := WorldEnvironment.new()
	var env := Environment.new()
	env.ambient_light_color = Color("667799")
	env.ambient_light_energy = 0.3
	env.background_mode = Environment.BG_COLOR
	env.background_color = Color("0e0e1a")
	ambient.environment = env
	add_child(ambient)

	_table = _make_table()
	add_child(_table)

	var card_data := [
		{"pos": Vector3(-1.6, 0.05, 0), "ranks": [7, 6, 2, 7], "color": Color("4a90d9"), "name": "Ifrit"},
		{"pos": Vector3(-0.5, 0.05, 0), "ranks": [5, 3, 8, 4], "color": Color("d94a4a"), "name": "Tonberry"},
		{"pos": Vector3(0.5, 0.05, 0),  "ranks": [9, 4, 7, 3], "color": Color("4a90d9"), "name": "Shiva"},
		{"pos": Vector3(1.6, 0.05, 0),  "ranks": [3, 8, 5, 6], "color": Color("d94a4a"), "name": "Odin"},
	]

	for d in card_data:
		var card := _make_card(d.ranks, d.color, d.name)
		card.position = d.pos
		add_child(card)
		_cards.append(card)

	var board_positions: Array[Vector3] = []
	var bx := -1.1
	var by := 0.05
	for row in 3:
		for col in 3:
			board_positions.append(Vector3(bx + col * 1.1, by, -1.8 + row * 1.5))

	for i in board_positions.size():
		var slot := _make_slot()
		slot.position = board_positions[i]
		slot.set_meta("board_idx", i)
		add_child(slot)

	_instructions_label()


func _make_table() -> MeshInstance3D:
	var mesh := BoxMesh.new()
	mesh.size = Vector3(12, 0.2, 8)
	var mat := StandardMaterial3D.new()
	mat.albedo_color = Color("2a5a2a")
	mat.roughness = 0.85
	var mi := MeshInstance3D.new()
	mi.mesh = mesh
	mi.material_override = mat
	mi.position.y = -0.15
	mi.create_trimesh_collision()
	return mi


func _make_slot() -> MeshInstance3D:
	var mesh := PlaneMesh.new()
	mesh.size = Vector2(0.95, 1.15)
	var mat := StandardMaterial3D.new()
	mat.albedo_color = Color("1a3a1a")
	mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
	mat.albedo_color.a = 0.6
	var mi := MeshInstance3D.new()
	mi.mesh = mesh
	mi.material_override = mat
	mi.rotation.x = -PI / 2
	return mi


func _make_card(ranks: Array, card_color: Color, card_name: String) -> Node3D:
	var root := Node3D.new()

	var mesh := BoxMesh.new()
	mesh.size = Vector3(0.85, 0.02, 1.1)

	var front_mat := StandardMaterial3D.new()
	front_mat.albedo_color = card_color
	front_mat.roughness = 0.5

	var mi := MeshInstance3D.new()
	mi.mesh = mesh
	mi.material_override = front_mat
	mi.rotation.x = -PI / 2
	root.add_child(mi)

	var col := CollisionShape3D.new()
	var shape := BoxShape3D.new()
	shape.size = Vector3(0.85, 0.1, 1.1)
	col.shape = shape
	col.rotation.x = -PI / 2

	var body := StaticBody3D.new()
	body.collision_layer = 2
	body.add_child(col)
	root.add_child(body)

	var edge_mat := StandardMaterial3D.new()
	edge_mat.albedo_color = Color("222233")
	edge_mat.roughness = 0.8

	var positions := [
		Vector3(0, 0.005, -0.42),
		Vector3(0.35, 0.005, 0),
		Vector3(0, 0.005, 0.38),
		Vector3(-0.35, 0.005, 0),
	]

	for i in 4:
		var label := Label3D.new()
		var v: int = ranks[i]
		label.text = "A" if v >= 10 else str(v)
		label.font_size = 22
		label.outline_size = 4
		label.modulate = Color.WHITE
		label.billboard = BaseMaterial3D.BILLBOARD_ENABLED
		label.position = positions[i]
		root.add_child(label)

	var name_label := Label3D.new()
	name_label.text = card_name
	name_label.font_size = 11
	name_label.outline_size = 3
	name_label.modulate = Color(1, 1, 1, 0.8)
	name_label.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	name_label.position = Vector3(0, 0.005, 0.15)
	name_label.pixel_size = 0.003
	root.add_child(name_label)

	root.set_meta("card_color", card_color)
	return root


func _instructions_label() -> void:
	var label := Label3D.new()
	label.text = "Click a card to flip it  |  R to reset"
	label.font_size = 18
	label.outline_size = 4
	label.modulate = Color("f0c040")
	label.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	label.position = Vector3(0, 0.5, -4)
	add_child(label)


func _input(event: InputEvent) -> void:
	if event is InputEventMouseButton and event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
		_pick_card(event)
	if event is InputEventKey and event.pressed and event.keycode == KEY_R:
		for card in _cards:
			card.rotation = Vector3.ZERO
			card.scale = Vector3.ONE


func _pick_card(event: InputEventMouseButton) -> void:
	if _flipping:
		return
	var from := _camera.project_ray_origin(event.position)
	var dir := _camera.project_ray_normal(event.position)
	var space_state := get_world_3d().direct_space_state
	var query := PhysicsRayQueryParameters3D.create(from, from + dir * 20)
	query.collision_mask = 0xFFFFFFFF
	var result := space_state.intersect_ray(query)
	if result.is_empty():
		return
	var hit: Object = result.collider
	for card in _cards:
		for child in card.get_children():
			if child is StaticBody3D and child == hit:
				_flip_card(card)
				return


func _flip_card(card: Node3D) -> void:
	_flipping = true
	var tween := create_tween()
	tween.set_parallel(true)
	tween.tween_property(card, "rotation:y", PI, 0.3).set_ease(Tween.EASE_IN)
	tween.tween_property(card, "position:y", 0.4, 0.15).set_trans(Tween.TRANS_SINE)
	tween.chain()
	tween.tween_property(card, "rotation:y", PI * 2, 0.3).set_ease(Tween.EASE_OUT)
	tween.tween_property(card, "position:y", 0.05, 0.15).set_trans(Tween.TRANS_SINE)
	tween.chain()
	tween.tween_callback(func(): _flipping = false)