class_name OperatorGallery
extends PanelContainer

var ui: GameUI
var viewport := SubViewport.new()
var world := Node3D.new()
var model: ImportedOperator
var camera := Camera3D.new()
var clips := OptionButton.new()
var scrub := HSlider.new()
var status := Label.new()
var playing := true
var elapsed := 0.0
var selected := "steve"
var yaw := 0.0
var distance := 2.5

func _ready() -> void:
	set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	var background := StyleBoxFlat.new()
	background.bg_color = Color("101820")
	add_theme_stylebox_override("panel", background)
	var margin := MarginContainer.new()
	for side: String in ["left", "right", "top", "bottom"]: margin.add_theme_constant_override("margin_" + side, 24)
	add_child(margin)
	var column := VBoxContainer.new()
	column.add_theme_constant_override("separation", 12)
	margin.add_child(column)
	var title := Label.new()
	title.text = "OPERATOR / ANIMATIONSSTUDIO"
	title.add_theme_font_size_override("font_size", 28)
	column.add_child(title)
	var row := HBoxContainer.new()
	column.add_child(row)
	var select := OptionButton.new()
	select.add_item("STEVE / SOLDAT")
	select.add_item("GAS MASK / SWAT")
	select.selected = 1 if ui.game.operator_id == "gas_mask" else 0
	row.add_child(select)
	select.item_selected.connect(func(index: int): select_model("gas_mask" if index == 1 else "steve"))
	var equip := Button.new()
	equip.text = "OPERATOR AUSRÜSTEN"
	row.add_child(equip)
	equip.pressed.connect(func():
		ui.game.operator_id = selected
		ui.preferences_changed.emit()
		status.text = "Gespeichert. Dein Operator ist im nächsten Match aktiv.")
	var preview := SubViewportContainer.new()
	preview.size_flags_vertical = Control.SIZE_EXPAND_FILL
	preview.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	preview.stretch = true
	preview.custom_minimum_size = Vector2(300, 220)
	column.add_child(preview)
	viewport.own_world_3d = true
	viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
	viewport.msaa_3d = get_viewport().msaa_3d
	preview.add_child(viewport)
	viewport.add_child(world)
	preview.gui_input.connect(inspect_input)
	world.add_child(camera)
	camera.fov = 45
	camera.make_current()
	var environment := WorldEnvironment.new()
	environment.environment = Environment.new()
	environment.environment.background_mode = Environment.BG_COLOR
	environment.environment.background_color = Color("151e29")
	environment.environment.ambient_light_source = Environment.AMBIENT_SOURCE_COLOR
	environment.environment.ambient_light_color = Color("b4cae2")
	environment.environment.ambient_light_energy = 0.75
	world.add_child(environment)
	var key := DirectionalLight3D.new()
	key.rotation_degrees = Vector3(-35, -30, 0)
	key.light_energy = 1.6
	key.shadow_enabled = true
	world.add_child(key)
	var fill := DirectionalLight3D.new()
	fill.rotation_degrees = Vector3(-20, 145, 0)
	fill.light_energy = 0.8
	fill.light_color = Color("8cb8ed")
	world.add_child(fill)
	var floor_mesh := MeshInstance3D.new()
	var plane := PlaneMesh.new()
	plane.size = Vector2(8, 8)
	floor_mesh.mesh = plane
	var mat := StandardMaterial3D.new()
	mat.albedo_color = Color("283440")
	mat.roughness = 0.9
	floor_mesh.material_override = mat
	world.add_child(floor_mesh)
	select_model("gas_mask" if select.selected == 1 else "steve")
	for clip: String in OperatorPose.library.get_animation_list():
		clips.add_item(clip.replace("__", " / ").replace("_", " "))
		clips.set_item_metadata(clips.item_count - 1, clip)
		if clip == "pro_rifle__idle_aiming": clips.selected = clips.item_count - 1
	clips.item_selected.connect(func(_index: int): elapsed = 0)
	column.add_child(clips)
	var playback := HBoxContainer.new()
	column.add_child(playback)
	var pause := Button.new()
	pause.text = "PAUSE / PLAY"
	pause.pressed.connect(func(): playing = not playing)
	playback.add_child(pause)
	scrub.min_value = 0
	scrub.max_value = 1
	scrub.step = 0.001
	scrub.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	scrub.value_changed.connect(func(value: float):
		playing = false
		elapsed = value * model.pose.clip(clip_key()).length)
	playback.add_child(scrub)
	status.text = "%d Clips · Ziehen: drehen · Mausrad: zoomen · Zeitleiste: Einzelpose" % clips.item_count
	column.add_child(status)
	var back := Button.new()
	back.text = "← ZURÜCK"
	back.pressed.connect(ui.main_menu)
	column.add_child(back)

func select_model(variant: String) -> void:
	if model != null:
		world.remove_child(model)
		model.queue_free()
	selected = variant
	model = ImportedOperator.new()
	world.add_child(model)
	model.setup(variant)
	model.weapon_mount.add_child(WeaponModels.build(ui.game.loadout))
	elapsed = 0

func clip_key() -> String:
	return str(clips.get_item_metadata(clips.selected)) if clips.item_count > 0 else "pro_rifle__idle_aiming"

func _process(delta: float) -> void:
	if model == null: return
	var key := clip_key()
	var length := model.pose.clip(key).length
	if playing: elapsed = fposmod(elapsed + delta, length + 0.5)
	model.preview(key, minf(elapsed, length))
	scrub.set_value_no_signal(minf(1, elapsed / length))
	model.rotation.y = yaw
	camera.position = Vector3(0.4, 1.25, -distance)
	camera.look_at(Vector3(0, 0.9, 0))

func inspect_input(event: InputEvent) -> void:
	if event is InputEventMouseMotion and event.button_mask & MOUSE_BUTTON_MASK_LEFT:
		yaw += event.relative.x * 0.012
	if event is InputEventMouseButton and event.pressed:
		if event.button_index == MOUSE_BUTTON_WHEEL_UP: distance = maxf(1.2, distance - 0.2)
		if event.button_index == MOUSE_BUTTON_WHEEL_DOWN: distance = minf(5, distance + 0.2)