class_name PauseMenu
extends Control
## In-game Pause & System Menu overlay.
##
## Provides resume, settings, controls guide, and safe exit confirmation.

signal resume_requested
signal edit_world_requested
signal friends_requested
signal chat_requested
signal controls_requested
signal leave_world_confirmed

var can_edit: bool = false
var world_title: String = "World"

var _confirm_box: VBoxContainer
var _main_menu_vbox: VBoxContainer
var _fs_button: Button


func _init(p_can_edit: bool = false, p_world_title: String = "World") -> void:
	name = "PauseMenu"
	can_edit = p_can_edit
	world_title = p_world_title
	set_anchors_preset(Control.PRESET_FULL_RECT)


func _ready() -> void:
	mouse_filter = Control.MOUSE_FILTER_STOP

	# Dark semi-transparent background
	var bg := ColorRect.new()
	bg.color = Color(0.05, 0.07, 0.10, 0.85)
	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
	add_child(bg)

	var center := CenterContainer.new()
	center.set_anchors_preset(Control.PRESET_FULL_RECT)
	add_child(center)

	var panel := PanelContainer.new()
	panel.custom_minimum_size = Vector2(400, 0)
	var style := StyleBoxFlat.new()
	style.bg_color = Color(0.12, 0.14, 0.18, 0.98)
	style.border_color = Color(0.35, 0.45, 0.65, 1.0)
	style.set_border_width_all(2)
	style.set_corner_radius_all(10)
	style.content_margin_left = 28
	style.content_margin_right = 28
	style.content_margin_top = 24
	style.content_margin_bottom = 24
	panel.add_theme_stylebox_override("panel", style)
	center.add_child(panel)

	var root_vbox := VBoxContainer.new()
	root_vbox.add_theme_constant_override("separation", 16)
	panel.add_child(root_vbox)

	# Title & World info
	var header_vbox := VBoxContainer.new()
	header_vbox.add_theme_constant_override("separation", 4)
	root_vbox.add_child(header_vbox)

	var title := Label.new()
	title.text = "PAUSED"
	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	title.add_theme_font_size_override("font_size", 28)
	title.add_theme_color_override("font_color", Color(1.0, 1.0, 1.0))
	header_vbox.add_child(title)

	var subtitle := Label.new()
	subtitle.text = world_title
	subtitle.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	subtitle.add_theme_font_size_override("font_size", 14)
	subtitle.add_theme_color_override("font_color", Color(0.65, 0.75, 0.9))
	header_vbox.add_child(subtitle)

	# Main action buttons
	_main_menu_vbox = VBoxContainer.new()
	_main_menu_vbox.add_theme_constant_override("separation", 10)
	root_vbox.add_child(_main_menu_vbox)

	var resume_btn := _make_menu_btn("▶  Resume Game (ESC)", _on_resume_pressed, Color(0.4, 0.9, 0.5))
	_main_menu_vbox.add_child(resume_btn)

	if can_edit:
		var edit_btn := _make_menu_btn("🛠️  Creator Studio / Edit World (F2)", func(): edit_world_requested.emit())
		_main_menu_vbox.add_child(edit_btn)

	var friends_btn := _make_menu_btn("👥  Friends & Social (F1)", func(): friends_requested.emit())
	_main_menu_vbox.add_child(friends_btn)

	var chat_btn := _make_menu_btn("💬  Chat (T / Enter)", func(): chat_requested.emit())
	_main_menu_vbox.add_child(chat_btn)

	var controls_btn := _make_menu_btn("⌨️  Controls & Keybindings", func(): controls_requested.emit())
	_main_menu_vbox.add_child(controls_btn)

	_fs_button = _make_menu_btn("⛶  Toggle Fullscreen (F11)", _on_toggle_fs)
	_update_fs_label()
	_main_menu_vbox.add_child(_fs_button)

	var leave_btn := _make_menu_btn("🚪  Leave World", _on_prompt_leave, Color(1.0, 0.45, 0.45))
	_main_menu_vbox.add_child(leave_btn)

	# Confirmation Box (hidden initially)
	_confirm_box = VBoxContainer.new()
	_confirm_box.visible = false
	_confirm_box.add_theme_constant_override("separation", 14)
	root_vbox.add_child(_confirm_box)

	var confirm_msg := Label.new()
	confirm_msg.text = "Are you sure you want to leave this world?\nAny unsaved changes will be lost."
	confirm_msg.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	confirm_msg.autowrap_mode = TextServer.AUTOWRAP_WORD
	confirm_msg.add_theme_font_size_override("font_size", 14)
	confirm_msg.add_theme_color_override("font_color", Color(1.0, 0.85, 0.85))
	_confirm_box.add_child(confirm_msg)

	var confirm_btns := HBoxContainer.new()
	confirm_btns.alignment = BoxContainer.ALIGNMENT_CENTER
	confirm_btns.add_theme_constant_override("separation", 16)
	_confirm_box.add_child(confirm_btns)

	var cancel_leave_btn := Button.new()
	cancel_leave_btn.text = "Stay in World"
	cancel_leave_btn.custom_minimum_size = Vector2(130, 36)
	cancel_leave_btn.pressed.connect(_on_cancel_leave)
	confirm_btns.add_child(cancel_leave_btn)

	var confirm_leave_btn := Button.new()
	confirm_leave_btn.text = "Confirm Leave"
	confirm_leave_btn.custom_minimum_size = Vector2(130, 36)
	confirm_leave_btn.add_theme_color_override("font_color", Color(1.0, 0.4, 0.4))
	confirm_leave_btn.pressed.connect(func(): leave_world_confirmed.emit())
	confirm_btns.add_child(confirm_leave_btn)


func _make_menu_btn(label: String, callback: Callable, color: Color = Color.WHITE) -> Button:
	var btn := Button.new()
	btn.text = label
	btn.custom_minimum_size = Vector2(0, 38)
	if color != Color.WHITE:
		btn.add_theme_color_override("font_color", color)
	btn.pressed.connect(callback)
	return btn


func _on_resume_pressed() -> void:
	resume_requested.emit()


func _on_toggle_fs() -> void:
	Session.toggle_fullscreen()
	_update_fs_label()


func _update_fs_label() -> void:
	if _fs_button == null:
		return
	if DisplayServer.get_name() == "headless":
		_fs_button.text = "⛶  Toggle Fullscreen (F11)"
		return
	var m := DisplayServer.window_get_mode()
	if m == DisplayServer.WINDOW_MODE_FULLSCREEN or m == DisplayServer.WINDOW_MODE_EXCLUSIVE_FULLSCREEN:
		_fs_button.text = "🗗  Windowed Mode (F11)"
	else:
		_fs_button.text = "⛶  Fullscreen Mode (F11)"


func _on_prompt_leave() -> void:
	_main_menu_vbox.visible = false
	_confirm_box.visible = true


func _on_cancel_leave() -> void:
	_confirm_box.visible = false
	_main_menu_vbox.visible = true


func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_pressed("ui_cancel"):
		get_viewport().set_input_as_handled()
		if _confirm_box.visible:
			_on_cancel_leave()
		else:
			_on_resume_pressed()