class_name StudioStartScreen
extends Control
## Studio Start Screen offering starter templates and recent projects browser.

signal template_selected(template_name: String)
signal project_opened(path: String)

const MBWorldProjectIOClass = preload("res://scripts/studio/mbworld_project_io.gd")

var _recent_list: ItemList
var _templates_container: HBoxContainer
var _btn_open_file: Button
var _file_dialog: FileDialog


func _ready() -> void:
	_build_ui()
	_populate_recent_projects()


func _build_ui() -> void:
	set_anchors_preset(Control.PRESET_FULL_RECT)

	var bg := ColorRect.new()
	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
	bg.color = Color(0.12, 0.13, 0.16)
	add_child(bg)

	var margin := MarginContainer.new()
	margin.set_anchors_preset(Control.PRESET_FULL_RECT)
	margin.add_theme_constant_override("margin_left", 60)
	margin.add_theme_constant_override("margin_top", 40)
	margin.add_theme_constant_override("margin_right", 60)
	margin.add_theme_constant_override("margin_bottom", 40)
	add_child(margin)

	var root_vbox := VBoxContainer.new()
	root_vbox.add_theme_constant_override("separation", 24)
	margin.add_child(root_vbox)

	# Header
	var title_row := HBoxContainer.new()
	var title := Label.new()
	title.text = "🦬 ModBison Studio"
	title.add_theme_font_size_override("font_size", 28)
	title.add_theme_color_override("font_color", Color(1.0, 0.9, 0.3))
	title_row.add_child(title)

	var spacer := Control.new()
	spacer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	title_row.add_child(spacer)

	_btn_open_file = Button.new()
	_btn_open_file.text = "📂 Open from Disk..."
	_btn_open_file.pressed.connect(_on_open_file_pressed)
	title_row.add_child(_btn_open_file)

	root_vbox.add_child(title_row)

	# Starter Templates Section
	var tmpl_lbl := Label.new()
	tmpl_lbl.text = "Starter Templates"
	tmpl_lbl.add_theme_font_size_override("font_size", 16)
	tmpl_lbl.add_theme_color_override("font_color", Color(0.3, 0.85, 1.0))
	root_vbox.add_child(tmpl_lbl)

	_templates_container = HBoxContainer.new()
	_templates_container.add_theme_constant_override("separation", 16)
	root_vbox.add_child(_templates_container)

	_create_template_card("Baseplate", "Clean empty 32x32 world grid ready for custom building.", "baseplate")
	_create_template_card("Rolling Hills", "Natural outdoor terrain with pine trees and fauna.", "terrain")
	_create_template_card("Obby Parkour", "Action platformer obstacle course with moving elevators.", "obby")

	# Recent Projects Section
	var rec_lbl := Label.new()
	rec_lbl.text = "Recent Worlds"
	rec_lbl.add_theme_font_size_override("font_size", 16)
	rec_lbl.add_theme_color_override("font_color", Color(0.4, 0.9, 0.5))
	root_vbox.add_child(rec_lbl)

	_recent_list = ItemList.new()
	_recent_list.size_flags_vertical = Control.SIZE_EXPAND_FILL
	_recent_list.custom_minimum_size = Vector2(0, 160)
	_recent_list.item_activated.connect(_on_recent_item_activated)
	root_vbox.add_child(_recent_list)

	# File Dialog
	_file_dialog = FileDialog.new()
	_file_dialog.file_mode = FileDialog.FILE_MODE_OPEN_FILE
	_file_dialog.access = FileDialog.ACCESS_FILESYSTEM
	_file_dialog.filters = PackedStringArray(["*.mbworld ; ModBison World Files"])
	_file_dialog.file_selected.connect(_on_file_dialog_selected)
	add_child(_file_dialog)


func _create_template_card(title: String, desc: String, template_id: String) -> void:
	var panel := PanelContainer.new()
	panel.custom_minimum_size = Vector2(220, 120)
	panel.size_flags_horizontal = Control.SIZE_EXPAND_FILL

	var vbox := VBoxContainer.new()
	vbox.add_theme_constant_override("separation", 8)
	panel.add_child(vbox)

	var t_lbl := Label.new()
	t_lbl.text = title
	t_lbl.add_theme_font_size_override("font_size", 14)
	t_lbl.add_theme_color_override("font_color", Color(1.0, 0.95, 0.4))
	vbox.add_child(t_lbl)

	var d_lbl := Label.new()
	d_lbl.text = desc
	d_lbl.add_theme_font_size_override("font_size", 10)
	d_lbl.add_theme_color_override("font_color", Color(0.7, 0.7, 0.7))
	d_lbl.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	d_lbl.size_flags_vertical = Control.SIZE_EXPAND_FILL
	vbox.add_child(d_lbl)

	var btn := Button.new()
	btn.text = "Create World"
	btn.pressed.connect(func(): template_selected.emit(template_id))
	vbox.add_child(btn)

	_templates_container.add_child(panel)


func _populate_recent_projects() -> void:
	_recent_list.clear()
	var recents: Array = MBWorldProjectIOClass.get_recent_projects()
	if recents.is_empty():
		_recent_list.add_item("(No recent projects)")
		_recent_list.set_item_disabled(0, true)
	else:
		for path in recents:
			var fname = str(path).get_file()
			_recent_list.add_item("📄 %s (%s)" % [fname, path])


func _on_recent_item_activated(index: int) -> void:
	var recents: Array = MBWorldProjectIOClass.get_recent_projects()
	if index >= 0 and index < recents.size():
		var path: String = str(recents[index])
		project_opened.emit(path)


func _on_open_file_pressed() -> void:
	_file_dialog.popup_centered(Vector2i(700, 450))


func _on_file_dialog_selected(path: String) -> void:
	project_opened.emit(path)