@tool
class_name PreviewPanel
extends PanelContainer

# UI panel for displaying the preview

# UI elements
var preview_viewport: SubViewport
var preview_texture: TextureRect
var controls_container: HBoxContainer
var play_button: Button
var pause_button: Button
var stop_button: Button
var speed_slider: HSlider
var progress_bar: ProgressBar
var debug_label: Label

# Properties
var preview_manager: PreviewManager
var is_playing: bool = false

# Initialize the preview panel
func _ready() -> void:
	_setup_ui()
	_setup_signals()

# Set up the UI
func _setup_ui() -> void:
	# Main container
	var main_vbox = VBoxContainer.new()
	main_vbox.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	main_vbox.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(main_vbox)
	
	# Preview viewport
	var viewport_container = AspectRatioContainer.new()
	viewport_container.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	viewport_container.size_flags_vertical = Control.SIZE_EXPAND_FILL
	viewport_container.ratio = 16.0/9.0
	main_vbox.add_child(viewport_container)
	
	preview_viewport = SubViewport.new()
	preview_viewport.size = Vector2i(800, 450)
	preview_viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
	viewport_container.add_child(preview_viewport)
	
	preview_texture = TextureRect.new()
	preview_texture.expand = true
	preview_texture.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	preview_texture.size_flags_vertical = Control.SIZE_EXPAND_FILL
	preview_texture.texture = preview_viewport.get_texture()
	viewport_container.add_child(preview_texture)
	
	# Controls
	controls_container = HBoxContainer.new()
	controls_container.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	main_vbox.add_child(controls_container)
	
	play_button = Button.new()
	play_button.text = "▶"
	play_button.flat = true
	controls_container.add_child(play_button)
	
	pause_button = Button.new()
	pause_button.text = "⏸"
	pause_button.flat = true
	controls_container.add_child(pause_button)
	
	stop_button = Button.new()
	stop_button.text = "⏹"
	stop_button.flat = true
	controls_container.add_child(stop_button)
	
	var speed_label = Label.new()
	speed_label.text = "Speed:"
	controls_container.add_child(speed_label)
	
	speed_slider = HSlider.new()
	speed_slider.min = 0.1
	speed_slider.max = 2.0
	speed_slider.step = 0.1
	speed_slider.value = 1.0
	speed_slider.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	controls_container.add_child(speed_slider)
	
	# Progress bar
	progress_bar = ProgressBar.new()
	progress_bar.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	progress_bar.percent_visible = true
	main_vbox.add_child(progress_bar)
	
	# Debug info
	debug_label = Label.new()
	debug_label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	main_vbox.add_child(debug_label)

# Set up signal connections
func _setup_signals() -> void:
	play_button.connect("pressed", _on_play_pressed)
	pause_button.connect("pressed", _on_pause_pressed)
	stop_button.connect("pressed", _on_stop_pressed)
	speed_slider.connect("value_changed", _on_speed_changed)

# Set the preview manager
func set_preview_manager(manager: PreviewManager) -> void:
	preview_manager = manager
	
	# Connect to preview manager signals
	if preview_manager:
		preview_manager.connect("preview_started", _on_preview_started)
		preview_manager.connect("preview_stopped", _on_preview_stopped)
		preview_manager.connect("preview_paused", _on_preview_paused)
		preview_manager.connect("preview_resumed", _on_preview_resumed)
		preview_manager.connect("preview_progress", _on_preview_progress)
		preview_manager.connect("node_activated", _on_node_activated)
		preview_manager.connect("node_completed", _on_node_completed)

# Set the graph editor
func set_graph_edit(graph_edit: CutsceneGraphEdit) -> void:
	if preview_manager:
		preview_manager.setup_preview(graph_edit)
		
		# Add preview scene to viewport
		var preview_scene = preview_manager.get_preview_scene()
		if preview_scene and preview_scene.get_parent() != preview_viewport:
			preview_viewport.add_child(preview_scene)

# Handle play button press
func _on_play_pressed() -> void:
	if preview_manager:
		if is_playing:
			preview_manager.resume_preview()
		else:
			preview_manager.start_preview()

# Handle pause button press
func _on_pause_pressed() -> void:
	if preview_manager:
		preview_manager.pause_preview()

# Handle stop button press
func _on_stop_pressed() -> void:
	if preview_manager:
		preview_manager.stop_preview()

# Handle speed slider change
func _on_speed_changed(value: float) -> void:
	if preview_manager:
		preview_manager.set_preview_speed(value)

# Handle preview started
func _on_preview_started() -> void:
	is_playing = true
	play_button.text = "⏸"
	debug_label.text = "Preview started"

# Handle preview stopped
func _on_preview_stopped() -> void:
	is_playing = false
	play_button.text = "▶"
	progress_bar.value = 0
	debug_label.text = "Preview stopped"

# Handle preview paused
func _on_preview_paused() -> void:
	is_playing = false
	play_button.text = "▶"
	debug_label.text = "Preview paused"

# Handle preview resumed
func _on_preview_resumed() -> void:
	is_playing = true
	play_button.text = "⏸"
	debug_label.text = "Preview resumed"

# Handle preview progress
func _on_preview_progress(progress: float) -> void:
	progress_bar.value = progress * 100

# Handle node activated
func _on_node_activated(node_name: String) -> void:
	debug_label.text = "Executing: %s" % node_name

# Handle node completed
func _on_node_completed(node_name: String) -> void:
	debug_label.text = "Completed: %s" % node_name