<?php
/**
 * Admin menu + page routing for the plugin.
 *
 * @package AgenizedChatWidget
 */

namespace AgenizedChatWidget;

if (!defined('ABSPATH')) {
	exit;
}

require_once __DIR__ . '/admin/pages/SetupPage.php';

final class AdminMenu {
	public const MENU_SLUG = 'agenized';
	private static string $menu_icon_data_uri = '';

	public static function init(): void {
		add_action('admin_menu', [self::class, 'register_menu']);
		add_action('admin_init', [self::class, 'register_settings']);
		add_action('admin_enqueue_scripts', [self::class, 'enqueue_admin_assets']);
	}

	public static function register_menu(): void {
		// Use the Agenized brand mark for WP admin menu.
		self::$menu_icon_data_uri = self::get_menu_icon_data_uri();
		$icon_url = self::$menu_icon_data_uri !== '' ? 'none' : 'dashicons-admin-generic';

		add_menu_page(
			__('Agenized', 'agenized-for-woocommerce'),
			__('Agenized', 'agenized-for-woocommerce'),
			'manage_options',
			self::MENU_SLUG,
			[self::class, 'render_setup'],
			$icon_url,
			99
		);
		
		add_submenu_page(self::MENU_SLUG, __('Setup', 'agenized-for-woocommerce'), __('Setup', 'agenized-for-woocommerce'), 'manage_options', self::MENU_SLUG, [self::class, 'render_setup']);

		// Hidden legacy routes, mapped to Setup to avoid dead links from old versions.
		add_submenu_page('', __('Agenized Setup', 'agenized-for-woocommerce'), __('Agenized Setup', 'agenized-for-woocommerce'), 'manage_options', self::MENU_SLUG . '-connection', [self::class, 'render_setup']);
		add_submenu_page('', __('Agenized Setup', 'agenized-for-woocommerce'), __('Agenized Setup', 'agenized-for-woocommerce'), 'manage_options', self::MENU_SLUG . '-channels', [self::class, 'render_setup']);
		add_submenu_page('', __('Agenized Setup', 'agenized-for-woocommerce'), __('Agenized Setup', 'agenized-for-woocommerce'), 'manage_options', self::MENU_SLUG . '-sources-woocommerce', [self::class, 'render_setup']);
		add_submenu_page('', __('Agenized Setup', 'agenized-for-woocommerce'), __('Agenized Setup', 'agenized-for-woocommerce'), 'manage_options', self::MENU_SLUG . '-sources-sitemap', [self::class, 'render_setup']);

		// Legacy OAuth redirect target (back-compat):
		// Older builds (and some OAuth client configs) use admin.php?page=agenized-chat-widget as redirect_uri.
		// We keep a hidden page registered at that slug so the callback can be handled.
		add_submenu_page(
			'',
			__('Agenized OAuth Callback', 'agenized-for-woocommerce'),
			__('Agenized OAuth Callback', 'agenized-for-woocommerce'),
			'manage_options',
			'agenized-chat-widget',
			[self::class, 'render_setup']
		);

	}

	private static function get_menu_icon_data_uri(): string {
		$icon_path = AGENIZED_CHAT_WIDGET_PLUGIN_DIR . 'assets/agenized-menu-icon.svg';
		if (!file_exists($icon_path)) {
			return '';
		}

		$svg = file_get_contents($icon_path);
		if (!is_string($svg) || $svg === '') {
			return '';
		}

		return 'data:image/svg+xml;base64,' . base64_encode($svg);
	}

	/**
	 * Enqueue admin CSS/JS (no raw &lt;style&gt;/&lt;script&gt; in templates).
	 *
	 * @param string $hook_suffix Current admin screen hook.
	 */
	public static function enqueue_admin_assets(string $_hook_suffix): void {
		wp_register_style(
			'agenized-admin-menu-icon',
			false,
			[],
			AGENIZED_CHAT_WIDGET_VERSION
		);
		wp_enqueue_style('agenized-admin-menu-icon');
		wp_add_inline_style('agenized-admin-menu-icon', self::get_menu_icon_css_text());

		if (!self::is_agenized_setup_screen()) {
			return;
		}

		wp_register_script(
			'agenized-setup-oauth-field',
			false,
			[],
			AGENIZED_CHAT_WIDGET_VERSION,
			true
		);
		wp_enqueue_script('agenized-setup-oauth-field');
		wp_add_inline_script('agenized-setup-oauth-field', self::get_setup_oauth_client_id_script());
	}

	/**
	 * Whether the current request is rendering the unified Setup UI.
	 */
	private static function is_agenized_setup_screen(): bool {
		// phpcs:disable WordPress.Security.NonceVerification.Recommended -- Read-only `page` query arg (admin screen routing), not form submission.
		if (!isset($_GET['page'])) {
			return false;
		}
		$page = sanitize_text_field(wp_unslash($_GET['page']));
		// phpcs:enable WordPress.Security.NonceVerification.Recommended
		$setup_pages = [
			self::MENU_SLUG,
			self::MENU_SLUG . '-connection',
			self::MENU_SLUG . '-channels',
			self::MENU_SLUG . '-sources-woocommerce',
			self::MENU_SLUG . '-sources-sitemap',
			'agenized-chat-widget',
		];
		return in_array($page, $setup_pages, true);
	}

	/**
	 * Inline script: unlock OAuth Client ID field on "Edit".
	 */
	private static function get_setup_oauth_client_id_script(): string {
		$field_id = Options::OPT_OAUTH_CLIENT_ID;
		return '(function(){var editBtn=document.getElementById("agenized-edit-oauth-client-id");var input=document.getElementById('
			. wp_json_encode($field_id)
			. ');var warning=document.getElementById("agenized-oauth-client-id-warning");if(!editBtn||!input||!warning)return;editBtn.addEventListener("click",function(){input.removeAttribute("readonly");input.setAttribute("type","text");warning.style.display="block";input.focus();editBtn.disabled=true;});})();';
	}

	/**
	 * CSS for custom admin menu icon (mask over ::before).
	 */
	private static function get_menu_icon_css_text(): string {
		$icon_url = self::$menu_icon_data_uri !== '' ? esc_url(self::$menu_icon_data_uri) : '';
		$mask_block = '';
		if ($icon_url !== '') {
			$url_css = wp_json_encode($icon_url);
			$mask_block = 'content:"";position:absolute;top:50%;left:50%;display:block;width:18px;height:18px;margin:0;transform:translate(-50%,-50%);background-color:#a7aaad;'
				. '-webkit-mask-image:url(' . $url_css . ');-webkit-mask-repeat:no-repeat;-webkit-mask-position:center;-webkit-mask-size:contain;'
				. 'mask-image:url(' . $url_css . ');mask-repeat:no-repeat;mask-position:center;mask-size:contain;opacity:1;';
		}

		return '#toplevel_page_agenized .wp-menu-image{position:relative;}'
			. '#toplevel_page_agenized .wp-menu-image::before{' . $mask_block . '}'
			. '#adminmenu li#toplevel_page_agenized:hover .wp-menu-image::before{background-color:#72aee6;}'
			. '#adminmenu li#toplevel_page_agenized.current .wp-menu-image::before,'
			. '#adminmenu li#toplevel_page_agenized.wp-has-current-submenu .wp-menu-image::before{background-color:#f0f0f1;}'
			. '#adminmenu #toplevel_page_agenized>a:hover .wp-menu-name,'
			. '#adminmenu #toplevel_page_agenized>a:hover .wp-menu-arrow div::before{color:#72aee6!important;}'
			. '#adminmenu #toplevel_page_agenized.current>a .wp-menu-name,'
			. '#adminmenu #toplevel_page_agenized.current>a .wp-menu-arrow div::before,'
			. '#adminmenu #toplevel_page_agenized.wp-has-current-submenu>a .wp-menu-name,'
			. '#adminmenu #toplevel_page_agenized.wp-has-current-submenu>a .wp-menu-arrow div::before{color:#f0f0f1!important;}'
			. '#toplevel_page_agenized .wp-menu-image img{display:none!important;}';
	}

	public static function register_settings(): void {
		// Core connection settings (and expanded in env-defaults todo).
		AdminPages\SetupPage::register_settings();
	}

	public static function render_setup(): void {
		AdminPages\SetupPage::render();
	}

}