@tool
extends EditorPlugin

enum { TAB_EDITOR, TAB_OVERVIEW, TAB_MANAGE }

var main: Control
var modified: bool:
    set(m):
        if m == modified:
            return
        
        modified = m
        dirty_toggled.emit(modified)

var theme_scanner: Timer
var prev_theme_state: Array

signal dirty_toggled

func _has_main_screen() -> bool:
    return true

func _get_plugin_name() -> String:
    return "MetSys"

func _get_plugin_icon() -> Texture2D:
    return preload("res://addons/MetroidvaniaSystem/Icon.png")

func _enter_tree() -> void:
    theme_scanner = Timer.new()
    theme_scanner.wait_time = 0.6
    add_child(theme_scanner)
    theme_scanner.timeout.connect(check_theme)
    
    await get_tree().process_frame
    if not get_singleton():
        add_autoload_singleton("MetSys", "res://addons/MetroidvaniaSystem/Nodes/Singleton.tscn")
        ProjectSettings.save()
        OS.set_restart_on_exit(true, ["-e"])
        get_tree().quit()
        return
    
    main = preload("res://addons/MetroidvaniaSystem/Database/Main.tscn").instantiate()
    main.plugin = self
    get_editor_interface().get_editor_main_screen().add_child(main)
    main.hide()
    
    get_singleton().settings.theme_changed.connect(func(): prev_theme_state.clear())

func _exit_tree() -> void:
    main.queue_free()

func _make_visible(visible: bool) -> void:
    main.visible = visible
    if visible:
        theme_scanner.start()
    else:
        theme_scanner.stop()

func _save_external_data() -> void:
    get_singleton().map_data.save_data()
    modified = false

func _get_unsaved_status(for_scene: String) -> String:
    if modified and for_scene.is_empty():
        return "MetSys map has been modified."
    return ""

func get_singleton() -> MetroidvaniaSystem:
    return get_tree().root.get_node_or_null(^"MetSys")

func check_theme():
    var theme := get_singleton().settings.theme
    var changed := theme.check_for_changes(prev_theme_state)
    if not changed.is_empty():
        get_singleton().theme_modified.emit(changed)