@tool
extends Button

const DialogueConstants = preload("../constants.gd")
const DialogueSettings = preload("../settings.gd")

const REMOTE_RELEASES_URL = "https://api.github.com/repos/nathanhoad/godot_dialogue_manager/releases"


@onready var http_request: HTTPRequest = $HTTPRequest
@onready var download_dialog: AcceptDialog = $DownloadDialog
@onready var download_update_panel = $DownloadDialog/DownloadUpdatePanel
@onready var needs_reload_dialog: AcceptDialog = $NeedsReloadDialog
@onready var update_failed_dialog: AcceptDialog = $UpdateFailedDialog
@onready var timer: Timer = $Timer

var needs_reload: bool = false

# A lambda that gets called just before refreshing the plugin. Return false to stop the reload.
var on_before_refresh: Callable = func(): return true


func _ready() -> void:
	hide()
	apply_theme()

	# Check for updates on GitHub
	check_for_update()

	# Check again every few hours
	timer.start(60 * 60 * 12)


# Convert a version number to an actually comparable number
func version_to_number(version: String) -> int:
	var bits = version.split(".")
	return bits[0].to_int() * 1000000 + bits[1].to_int() * 1000 + bits[2].to_int()


func apply_theme() -> void:
	var color: Color = get_theme_color("success_color", "Editor")

	if needs_reload:
		color = get_theme_color("error_color", "Editor")
		icon = get_theme_icon("Reload", "EditorIcons")
		add_theme_color_override("icon_normal_color", color)
		add_theme_color_override("icon_focus_color", color)
		add_theme_color_override("icon_hover_color", color)

	add_theme_color_override("font_color", color)
	add_theme_color_override("font_focus_color", color)
	add_theme_color_override("font_hover_color", color)


func check_for_update() -> void:
	if DialogueSettings.get_user_value("check_for_updates", true):
		http_request.request(REMOTE_RELEASES_URL)


### Signals


func _on_http_request_request_completed(result: int, response_code: int, headers: PackedStringArray, body: PackedByteArray) -> void:
	if result != HTTPRequest.RESULT_SUCCESS: return

	var current_version: String = Engine.get_meta("DialogueManagerPlugin").get_version()

	# Work out the next version from the releases information on GitHub
	var response = JSON.parse_string(body.get_string_from_utf8())
	if typeof(response) != TYPE_ARRAY: return

	# GitHub releases are in order of creation, not order of version
	var versions = (response as Array).filter(func(release):
		var version: String = release.tag_name.substr(1)
		var major_version: int = version.split(".")[0].to_int()
		var current_major_version: int = current_version.split(".")[0].to_int()
		return major_version == current_major_version and version_to_number(version) > version_to_number(current_version)
	)
	if versions.size() > 0:
		download_update_panel.next_version_release = versions[0]
		text = DialogueConstants.translate(&"update.available").format({ version = versions[0].tag_name.substr(1) })
		show()


func _on_update_button_pressed() -> void:
	if needs_reload:
		var will_refresh = on_before_refresh.call()
		if will_refresh:
			Engine.get_meta("DialogueManagerPlugin").get_editor_interface().restart_editor(true)
	else:
		var scale: float = Engine.get_meta("DialogueManagerPlugin").get_editor_interface().get_editor_scale()
		download_dialog.min_size = Vector2(300, 250) * scale
		download_dialog.popup_centered()


func _on_download_dialog_close_requested() -> void:
	download_dialog.hide()


func _on_download_update_panel_updated(updated_to_version: String) -> void:
	download_dialog.hide()

	needs_reload_dialog.dialog_text = DialogueConstants.translate(&"update.needs_reload")
	needs_reload_dialog.ok_button_text = DialogueConstants.translate(&"update.reload_ok_button")
	needs_reload_dialog.cancel_button_text = DialogueConstants.translate(&"update.reload_cancel_button")
	needs_reload_dialog.popup_centered()

	needs_reload = true
	text = DialogueConstants.translate(&"update.reload_project")
	apply_theme()


func _on_download_update_panel_failed() -> void:
	download_dialog.hide()
	update_failed_dialog.dialog_text = DialogueConstants.translate(&"update.failed")
	update_failed_dialog.popup_centered()


func _on_needs_reload_dialog_confirmed() -> void:
	Engine.get_meta("DialogueManagerPlugin").get_editor_interface().restart_editor(true)


func _on_timer_timeout() -> void:
	if not needs_reload:
		check_for_update()