<?php
/**
 * Admin menus, pages, notices, form handlers.
 *
 * @package C7DBT
 */

defined( 'ABSPATH' ) || exit;

class C7DBT_Admin {

	/**
	 * Hooks.
	 */
	public function hooks() {
		add_action( 'admin_menu', array( $this, 'register_menu' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ) );
		add_action( 'admin_init', array( $this, 'handle_actions' ) );
		add_action( 'admin_init', array( $this, 'legacy_page_redirects' ) );
		add_action( 'admin_notices', array( $this, 'admin_notices' ) );
	}

	/**
	 * Register menu (FixSeal-style: single Dashboard entry, no duplicate top item).
	 */
	public function register_menu() {
		add_menu_page(
			__( 'C7 Shop & Branding', '7labs-debug-branding-for-commerce7' ),
			__( 'C7 Shop & Branding', '7labs-debug-branding-for-commerce7' ),
			'manage_options',
			'c7dbt',
			array( $this, 'render_dashboard' ),
			'dashicons-art',
			58
		);

		// Replace auto-generated first submenu with a clean "Dashboard" label.
		add_submenu_page( 'c7dbt', __( 'Dashboard', '7labs-debug-branding-for-commerce7' ), __( 'Dashboard', '7labs-debug-branding-for-commerce7' ), 'manage_options', 'c7dbt', array( $this, 'render_dashboard' ) );

		$pages = array(
			'c7dbt-routes' => array( __( 'Shop Setup', '7labs-debug-branding-for-commerce7' ), 'render_routes' ),
			'c7dbt-menus'  => array( __( 'Menus & Fixes', '7labs-debug-branding-for-commerce7' ), 'render_menus' ),
			'c7dbt-design'    => array( __( 'Design', '7labs-debug-branding-for-commerce7' ), 'render_design' ),
			'c7dbt-prelaunch' => array( __( 'Launch & QA', '7labs-debug-branding-for-commerce7' ), 'render_prelaunch' ),
			'c7dbt-help'      => array( __( 'Get Help', '7labs-debug-branding-for-commerce7' ), 'render_help' ),
			'c7dbt-settings'  => array( __( 'Settings', '7labs-debug-branding-for-commerce7' ), 'render_settings' ),
		);

		foreach ( $pages as $slug => $data ) {
			add_submenu_page( 'c7dbt', $data[0], $data[0], 'manage_options', $slug, array( $this, $data[1] ) );
		}
	}

	/**
	 * Whether current admin screen belongs to this plugin.
	 *
	 * @param string $hook Hook suffix.
	 * @return bool
	 */
	private function is_plugin_screen( $hook = '' ) {
		if ( $hook ) {
			if ( 'toplevel_page_c7dbt' === $hook ) {
				return true;
			}
			if ( 0 === strpos( $hook, 'c7dbt_page_' ) ) {
				return true;
			}
		}

		if ( empty( $_GET['page'] ) ) { // phpcs:ignore
			return false;
		}
		$page = sanitize_key( wp_unslash( $_GET['page'] ) ); // phpcs:ignore
		return ( 'c7dbt' === $page || 0 === strpos( $page, 'c7dbt-' ) );
	}

	/**
	 * Assets — only on our screens (FixSeal pattern).
	 *
	 * @param string $hook Hook.
	 */
	public function enqueue( $hook ) {
		if ( ! $this->is_plugin_screen( $hook ) ) {
			return;
		}
		wp_enqueue_style( 'wp-color-picker' );
		wp_enqueue_script( 'wp-color-picker' );
		wp_enqueue_style(
			'c7dbt-admin',
			C7DBT_URL . 'admin/css/admin.css',
			array( 'wp-color-picker' ),
			C7DBT_VERSION
		);
		wp_enqueue_script(
			'c7dbt-admin',
			C7DBT_URL . 'admin/js/admin.js',
			array( 'jquery', 'wp-color-picker' ),
			C7DBT_VERSION,
			true
		);
		wp_localize_script(
			'c7dbt-admin',
			'c7dbtAdmin',
			array(
				'i18n' => array(
					'copied'       => __( 'Copied', '7labs-debug-branding-for-commerce7' ),
					'reportCopied' => __( 'Report copied to clipboard', '7labs-debug-branding-for-commerce7' ),
				),
			)
		);
	}

	/**
	 * POST / GET actions.
	 */
	public function handle_actions() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		// Export brand kit (GET).
		if ( isset( $_GET['c7dbt_export'] ) && isset( $_GET['_wpnonce'] ) ) {
			if ( wp_verify_nonce( sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ), 'c7dbt_export' ) ) {
				$payload = ( new C7DBT_Brand_Kit() )->export_payload();
				nocache_headers();
				header( 'Content-Type: application/json; charset=utf-8' );
				header( 'Content-Disposition: attachment; filename=c7dbt-brand-kit.json' );
				echo wp_json_encode( $payload, JSON_PRETTY_PRINT );
				exit;
			}
		}

		// Developer / migration handoff report (GET). Full config + compiled CSS +
		// environment. Raw developer output — intended for a developer or 7Labs
		// integrating Commerce7 natively, not a one-click self-serve migration.
		if ( isset( $_GET['c7dbt_handoff'] ) && isset( $_GET['_wpnonce'] ) ) {
			if ( wp_verify_nonce( sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ), 'c7dbt_handoff' ) ) {
				$report = $this->build_handoff_report();
				nocache_headers();
				header( 'Content-Type: application/json; charset=utf-8' );
				header( 'Content-Disposition: attachment; filename=c7dbt-handoff-report.json' );
				echo wp_json_encode( $report, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES );
				exit;
			}
		}

		if ( empty( $_POST['c7dbt_action'] ) || empty( $_POST['_wpnonce'] ) ) {
			return;
		}

		$action = sanitize_key( wp_unslash( $_POST['c7dbt_action'] ) );
		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['_wpnonce'] ) ), 'c7dbt_admin' ) ) {
			return;
		}

		$redirect = admin_url( 'admin.php?page=c7dbt' );
		$input    = isset( $_POST['c7dbt'] ) ? wp_unslash( $_POST['c7dbt'] ) : array(); // phpcs:ignore
		$input    = is_array( $input ) ? $input : array();

		switch ( $action ) {
			case 'save_shop':
			case 'save_routes':
			case 'save_redirects':
				if ( isset( $input['redirect_from'], $input['redirect_to'] ) && is_array( $input['redirect_from'] ) ) {
					$custom = array();
					foreach ( $input['redirect_from'] as $i => $from ) {
						$to = isset( $input['redirect_to'][ $i ] ) ? $input['redirect_to'][ $i ] : '';
						if ( $from && $to ) {
							$custom[] = array( 'from' => $from, 'to' => $to );
						}
					}
					$input['custom_redirects'] = $custom;
				}
				C7DBT_Settings::update( C7DBT_Settings::sanitize( $input ) );
				$result = ( new C7DBT_Shop_Routes() )->apply();
				$messages = array_merge(
					array( __( 'Shop settings saved.', '7labs-debug-branding-for-commerce7' ) ),
					isset( $result['messages'] ) ? $result['messages'] : array()
				);
				$this->flash( $result['success'] ? 'success' : 'error', $messages );
				$redirect = admin_url( 'admin.php?page=c7dbt-routes' );
				break;

			case 'flush_permalinks':
				flush_rewrite_rules();
				$this->flash( 'success', array( __( 'Permalinks flushed.', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-routes' );
				break;

			case 'fix_menus':
				$result = ( new C7DBT_Menu_Scanner() )->fix_all();
				$this->flash( 'success', $result['messages'] );
				$redirect = admin_url( 'admin.php?page=c7dbt-menus' );
				break;

			case 'save_brand':
				$input['c7dbt_form'] = 'brand';
				C7DBT_Settings::update( C7DBT_Settings::sanitize( $input ) );
				$this->flash( 'success', array( __( 'Brand Kit saved. View any Commerce7 page to see changes.', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'save_layout':
				$input['c7dbt_form'] = 'layout';
				C7DBT_Settings::update( C7DBT_Settings::sanitize( $input ) );
				$this->flash( 'success', array( __( 'Shop Layout saved. Refresh a collection or product page to see changes.', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'import_font':
				if ( empty( $_FILES['c7dbt_font'] ) ) {
					$this->flash( 'error', array( __( 'No font file uploaded.', '7labs-debug-branding-for-commerce7' ) ) );
				} else {
					$result = ( new C7DBT_Fonts() )->import_upload( $_FILES['c7dbt_font'] ); // phpcs:ignore
					if ( is_wp_error( $result ) ) {
						$this->flash( 'error', array( $result->get_error_message() ) );
					} else {
						$this->flash(
							'success',
							array(
								sprintf(
									/* translators: %s: font family */
									__( 'Font “%s” uploaded. Select it under Heading or Body font, then save Brand Kit.', '7labs-debug-branding-for-commerce7' ),
									$result['family']
								),
							)
						);
					}
				}
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'delete_font':
				$id = isset( $_POST['font_id'] ) ? sanitize_text_field( wp_unslash( $_POST['font_id'] ) ) : '';
				if ( $id && ( new C7DBT_Fonts() )->delete_custom( $id ) ) {
					$this->flash( 'success', array( __( 'Custom font removed.', '7labs-debug-branding-for-commerce7' ) ) );
				} else {
					$this->flash( 'error', array( __( 'Could not remove font.', '7labs-debug-branding-for-commerce7' ) ) );
				}
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'apply_preset':
				$key = isset( $_POST['preset'] ) ? sanitize_key( wp_unslash( $_POST['preset'] ) ) : '';
				if ( C7DBT_Presets::apply( $key ) ) {
					$this->flash( 'success', array( __( 'Preset applied to Brand Kit.', '7labs-debug-branding-for-commerce7' ) ) );
				} else {
					$this->flash( 'error', array( __( 'Unknown preset.', '7labs-debug-branding-for-commerce7' ) ) );
				}
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'detect_theme':
				( new C7DBT_Brand_Kit() )->detect_theme_references();
				$this->flash( 'success', array( __( 'Theme references detected from Elementor / theme mods where available.', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'match_theme':
				C7DBT_Settings::update( C7DBT_Settings::sanitize( $input ) );
				( new C7DBT_Brand_Kit() )->match_theme_to_brand();
				$this->flash( 'success', array( __( 'Theme references copied into Brand Kit.', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'import_brand':
				$upload   = isset( $_FILES['c7dbt_import'] ) ? $_FILES['c7dbt_import'] : array(); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput
				$tmp_name = isset( $upload['tmp_name'] ) ? $upload['tmp_name'] : '';
				$err_code = isset( $upload['error'] ) ? (int) $upload['error'] : UPLOAD_ERR_NO_FILE;
				$size     = isset( $upload['size'] ) ? (int) $upload['size'] : 0;
				$max_size = 1048576; // 1 MB — a Brand Kit JSON is only a few KB.

				if ( UPLOAD_ERR_OK !== $err_code || '' === $tmp_name || ! is_uploaded_file( $tmp_name ) ) {
					$this->flash( 'error', array( __( 'No file uploaded.', '7labs-debug-branding-for-commerce7' ) ) );
				} elseif ( $size < 1 || $size > $max_size ) {
					$this->flash( 'error', array( __( 'That file is empty or too large for a Brand Kit.', '7labs-debug-branding-for-commerce7' ) ) );
				} else {
					$raw  = file_get_contents( $tmp_name ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
					$data = json_decode( (string) $raw, true );
					if ( ! is_array( $data ) || ! ( new C7DBT_Brand_Kit() )->import_payload( $data ) ) {
						$this->flash( 'error', array( __( 'Invalid Brand Kit JSON.', '7labs-debug-branding-for-commerce7' ) ) );
					} else {
						$this->flash( 'success', array( __( 'Brand Kit imported.', '7labs-debug-branding-for-commerce7' ) ) );
					}
				}
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'reset_brand':
				C7DBT_Settings::update( array( 'brand' => C7DBT_Settings::default_brand() ) );
				$this->flash( 'success', array( __( 'Brand Kit reset (no overrides).', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-design' );
				break;

			case 'save_settings':
				C7DBT_Settings::update( C7DBT_Settings::sanitize( $input ) );
				$this->flash( 'success', array( __( 'Settings saved.', '7labs-debug-branding-for-commerce7' ) ) );
				$redirect = admin_url( 'admin.php?page=c7dbt-settings' );
				break;

			case 'quick_fix':
				// One-click: enable redirect + apply routes + fix menus.
				$slug = isset( $input['default_collection_slug'] ) ? C7DBT_Helpers::normalize_collection_slug( $input['default_collection_slug'] ) : '';
				if ( ! $slug ) {
					$slug = C7DBT_Helpers::collection_slug();
				}
				C7DBT_Settings::update(
					array(
						'default_collection_slug'  => $slug,
						'redirect_collection_root' => 1,
						'update_continue_shopping' => 1,
					)
				);
				$r1 = ( new C7DBT_Shop_Routes() )->apply();
				$r2 = ( new C7DBT_Menu_Scanner() )->fix_all();
				$this->flash( 'success', array_merge( $r1['messages'], $r2['messages'] ) );
				$redirect = admin_url( 'admin.php?page=c7dbt&c7dbt_fixed=1' );
				break;

			case 'run_site_qa':
				$report = ( new C7DBT_Site_QA() )->run();
				$this->flash(
					$report['failed'] ? 'error' : 'success',
					array(
						sprintf(
							/* translators: 1: passed, 2: failed */
							__( 'Site QA finished: %1$d passed, %2$d failed.', '7labs-debug-branding-for-commerce7' ),
							$report['passed'],
							$report['failed']
						),
					)
				);
				$redirect = admin_url( 'admin.php?page=c7dbt-prelaunch' );
				break;
		}

		wp_safe_redirect( $redirect );
		exit;
	}

	/**
	 * Redirect legacy submenu slugs to merged screens.
	 */
	public function legacy_page_redirects() {
		if ( ! current_user_can( 'manage_options' ) || wp_doing_ajax() ) {
			return;
		}
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$page = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : '';
		$map  = array(
			'c7dbt-redirects' => 'c7dbt-routes',
			'c7dbt-conflicts' => 'c7dbt-menus',
			'c7dbt-qa'        => 'c7dbt-prelaunch',
			'c7dbt-brand'     => 'c7dbt-design',
			'c7dbt-layout'    => 'c7dbt-design',
			'c7dbt-visual'    => 'c7dbt-design',
		);
		if ( empty( $map[ $page ] ) ) {
			return;
		}
		wp_safe_redirect( admin_url( 'admin.php?page=' . $map[ $page ] ) );
		exit;
	}

	/**
	 * Flash notice.
	 *
	 * @param string $type     Type.
	 * @param array  $messages Messages.
	 */
	private function flash( $type, array $messages ) {
		set_transient(
			'c7dbt_admin_notice',
			array(
				'type'     => $type,
				'messages' => $messages,
			),
			60
		);
	}

	/**
	 * Notices — scoped to our screens only (avoid WP-admin noise).
	 */
	public function admin_notices() {
		if ( ! $this->is_plugin_screen() ) {
			return;
		}

		$notice = get_transient( 'c7dbt_admin_notice' );
		if ( $notice && is_array( $notice ) ) {
			delete_transient( 'c7dbt_admin_notice' );
			$class = ( 'error' === $notice['type'] ) ? 'notice-error' : 'notice-success';
			echo '<div class="notice ' . esc_attr( $class ) . ' is-dismissible"><p>' . esc_html( implode( ' ', (array) $notice['messages'] ) ) . '</p></div>';
		}

		// The Commerce7 connection prompt (card on Dashboard, banner on tool pages,
		// chip in the header) replaces the old "not connected" admin notice.
	}

	/**
	 * Build the developer / migration handoff report.
	 *
	 * Full plugin configuration, the compiled Commerce7 CSS the plugin injects,
	 * and environment details — everything needed to reproduce the current setup
	 * in a native Commerce7 integration.
	 *
	 * @return array
	 */
	private function build_handoff_report() {
		$settings = C7DBT_Settings::get();
		$theme    = wp_get_theme();

		$fonts = array();
		if ( ! empty( $settings['custom_fonts'] ) && is_array( $settings['custom_fonts'] ) ) {
			foreach ( $settings['custom_fonts'] as $font ) {
				$fonts[] = array(
					'label'    => isset( $font['label'] ) ? $font['label'] : '',
					'filename' => ( isset( $font['file'] ) && is_string( $font['file'] ) ) ? basename( $font['file'] ) : '',
				);
			}
		}

		return array(
			'meta'        => array(
				'plugin'       => '7labs-debug-branding-for-commerce7',
				'version'      => C7DBT_VERSION,
				'generated_at' => gmdate( 'c' ),
				'site_url'     => home_url( '/' ),
				'note'         => 'Developer handoff report. Contains the full plugin configuration and the compiled Commerce7 CSS this plugin injects. Intended for a developer or 7Labs integrating Commerce7 natively.',
			),
			'environment' => array(
				'wp_version'           => get_bloginfo( 'version' ),
				'php_version'          => PHP_VERSION,
				'active_theme'         => $theme ? $theme->get( 'Name' ) . ' ' . $theme->get( 'Version' ) : '',
				'commerce7_active'     => C7DBT_Helpers::is_c7wp_active(),
				'commerce7_connection' => C7DBT_Helpers::c7_connection_state(),
				'collection_slug'      => C7DBT_Helpers::collection_slug(),
			),
			'settings'    => $settings,
			'custom_fonts' => $fonts,
			'compiled_css' => array(
				'brand'  => ( new C7DBT_Brand_Kit() )->build_css( $settings ),
				'layout' => ( new C7DBT_Shop_Layout() )->build_css( $settings ),
			),
			'health'      => ( new C7DBT_Health() )->report(),
		);
	}

	/**
	 * Shared layout.
	 *
	 * @param string $title Title.
	 * @param string $view  View.
	 * @param array  $vars  Vars.
	 */
	private function render( $title, $view, array $vars = array() ) {
		$settings   = C7DBT_Settings::get();
		$page_title = $title;
		$current    = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : 'c7dbt'; // phpcs:ignore

		// Explicit extract-free assignment for views.
		foreach ( $vars as $key => $value ) {
			if ( is_string( $key ) && preg_match( '/^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*$/', $key ) ) {
				$$key = $value; // phpcs:ignore
			}
		}

		include C7DBT_PATH . 'admin/views/layout-header.php';
		$view_file = C7DBT_PATH . 'admin/views/' . $view . '.php';
		// Allow only known view basenames.
		if ( $view && false === strpos( $view, '..' ) && false === strpos( $view, '/' ) && false === strpos( $view, '\\' ) && file_exists( $view_file ) ) {
			include $view_file;
		}
		include C7DBT_PATH . 'admin/views/layout-footer.php';
	}

	public function render_dashboard() {
		$this->render(
			__( 'Dashboard', '7labs-debug-branding-for-commerce7' ),
			'dashboard',
			array( 'health' => ( new C7DBT_Health() )->report() )
		);
	}

	public function render_routes() {
		$settings = C7DBT_Settings::get();
		$this->render(
			__( 'Shop Setup', '7labs-debug-branding-for-commerce7' ),
			'routes',
			array(
				'status' => ( new C7DBT_Shop_Routes() )->status(),
				'map'    => ( new C7DBT_Redirects() )->get_redirect_map( $settings ),
			)
		);
	}

	public function render_menus() {
		$this->render(
			__( 'Menus & Fixes', '7labs-debug-branding-for-commerce7' ),
			'menus',
			array(
				'issues'         => ( new C7DBT_Menu_Scanner() )->find_issues(),
				'content_issues' => ( new C7DBT_Content_Scanner() )->find_issues(),
				'conflicts'      => ( new C7DBT_Conflicts() )->find_issues(),
			)
		);
	}

	public function render_design() {
		$health = ( new C7DBT_Health() )->report();
		$this->render(
			__( 'Design', '7labs-debug-branding-for-commerce7' ),
			'design',
			array(
				'presets'           => C7DBT_Presets::all(),
				'design_status'     => isset( $health['cards']['design'] ) ? $health['cards']['design'] : array(),
				'detected_builder'  => C7DBT_Shop_Layout::detect_builder(),
				'visual_conflicts'  => ( new C7DBT_Visual_Match() )->get_conflicts(),
			)
		);
	}

	public function render_prelaunch() {
		$this->render(
			__( 'Launch & QA', '7labs-debug-branding-for-commerce7' ),
			'prelaunch',
			array(
				'prelaunch'  => ( new C7DBT_Prelaunch() )->run(),
				'qa_report'  => ( new C7DBT_Site_QA() )->last_report(),
				'security'   => ( new C7DBT_Security() )->run(),
			)
		);
	}

	public function render_help() {
		$this->render(
			__( 'Get Help', '7labs-debug-branding-for-commerce7' ),
			'help',
			array(
				'packages'    => C7DBT_Helpers::service_packages(),
				'configured'  => C7DBT_Helpers::services_configured(),
			)
		);
	}

	public function render_settings() {
		$this->render( __( 'Settings', '7labs-debug-branding-for-commerce7' ), 'settings', array() );
	}
}