<?php

namespace HeyFeedback;

defined( 'ABSPATH' ) || exit;

use HeyFeedback\Conditions\ConditionEvaluator;
use HeyFeedback\FeedbackTypes\FeedbackTypeRegistry;

class Plugin {

	/**
	 * @var Plugin|null
	 */
	private static $instance = null;

	/**
	 * @var FeedbackTypeRegistry
	 */
	private $type_registry;

	/**
	 * @var ConditionEvaluator
	 */
	private $condition_evaluator;

	/**
	 * Returns the singleton instance.
	 *
	 * @return Plugin
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {
		$this->type_registry       = new FeedbackTypeRegistry();
		$this->condition_evaluator = new ConditionEvaluator();
		$this->register_feedback_types();
		$this->register_conditions();
		$this->maybe_upgrade_db();
		$this->init_hooks();
	}

	/**
	 * Returns the feedback type registry.
	 *
	 * @return FeedbackTypeRegistry
	 */
	public function type_registry(): FeedbackTypeRegistry {
		return $this->type_registry;
	}

	/**
	 * Returns the condition evaluator.
	 *
	 * @return ConditionEvaluator
	 */
	public function condition_evaluator(): ConditionEvaluator {
		return $this->condition_evaluator;
	}

	private function register_feedback_types() {
		$this->type_registry->register( new FeedbackTypes\LikeDislikeType() );
		$this->type_registry->register( new FeedbackTypes\EmojiType() );
		$this->type_registry->register( new FeedbackTypes\StarRatingType() );
		$this->type_registry->register( new FeedbackTypes\NpsType() );
		$this->type_registry->register( new FeedbackTypes\TextType() );
		$this->type_registry->register( new FeedbackTypes\QuickChoiceType() );

		/**
		 * Allows Pro and extensions to register additional feedback types.
		 *
		 * @param FeedbackTypeRegistry $registry The type registry.
		 */
		do_action( 'hey_feedback_register_types', $this->type_registry );
	}

	private function register_conditions() {
		$this->condition_evaluator->register( new Conditions\Core\PostTypeCondition() );
		$this->condition_evaluator->register( new Conditions\Core\TaxonomyCondition() );
		$this->condition_evaluator->register( new Conditions\Core\UserStatusCondition() );
		$this->condition_evaluator->register( new Conditions\Core\DelayCondition() );

		/**
		 * Allows Pro and extensions to register additional conditions.
		 *
		 * @param ConditionEvaluator $evaluator The condition evaluator.
		 */
		do_action( 'hey_feedback_register_conditions', $this->condition_evaluator );
	}

	private function maybe_upgrade_db() {
		$db_version = get_option( 'hey_feedback_db_version', '' );
		if ( $db_version !== HEY_FEEDBACK_VERSION ) {
			Database::create_tables();
			update_option( 'hey_feedback_db_version', HEY_FEEDBACK_VERSION );
		}
	}

	private function init_hooks() {
		add_action( 'init', array( '\HeyFeedback\Shortcode', 'register' ) );
		add_action( 'init', array( '\HeyFeedback\Block', 'register' ) );
		add_action( 'rest_api_init', array( $this, 'register_rest_routes' ) );

		Privacy::register();

		if ( is_admin() ) {
			add_action( 'admin_init', array( $this, 'maybe_redirect_to_onboarding' ) );
			add_action( 'admin_menu', array( $this, 'register_admin_menu' ) );
			add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );
			add_action( 'admin_notices', array( $this, 'maybe_show_review_notice' ) );
		}

		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_frontend_assets' ) );
		add_action( 'wp_footer', array( $this, 'render_widgets' ) );
		add_action( 'hey_feedback_send_digest', array( $this, 'send_digest_email' ) );
		add_action( 'init', array( $this, 'schedule_digest' ) );
	}

	public function register_rest_routes() {
		$controllers = array(
			new RestApi\RespondController(),
			new RestApi\WidgetsController(),
			new RestApi\AdminController(),
			new RestApi\DashboardController(),
			new RestApi\SettingsController(),
		);

		foreach ( $controllers as $controller ) {
			$controller->register_routes();
		}
	}

	public function maybe_redirect_to_onboarding() {
		if ( ! get_transient( 'hey_feedback_activation_redirect' ) ) {
			return;
		}
		delete_transient( 'hey_feedback_activation_redirect' );
		if ( wp_doing_ajax() || wp_doing_cron() ) {
			return;
		}
		global $wpdb;
		$table = Database::items_table();
		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$count = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM %i", $table ) );
		if ( $count > 0 ) {
			return;
		}
		wp_safe_redirect( admin_url( 'admin.php?page=hey-feedback-welcome' ) );
		exit;
	}

	public function maybe_show_review_notice() {
		$screen = get_current_screen();
		if ( ! $screen || strpos( $screen->id, 'hey-feedback' ) === false ) {
			return;
		}

		$user_id = get_current_user_id();

		if ( get_user_meta( $user_id, 'hey_feedback_reviewed', true ) ) {
			return;
		}

		$remind_after = (int) get_user_meta( $user_id, 'hey_feedback_review_remind_after', true );
		if ( $remind_after && time() < $remind_after ) {
			return;
		}

		global $wpdb;
		$table = Database::responses_table();
		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$count = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM %i", $table ) );

		$milestones = array( 75, 20, 5 );
		$current    = 0;
		foreach ( $milestones as $m ) {
			if ( $count >= $m ) {
				$current = $m;
				break;
			}
		}

		if ( ! $current ) {
			return;
		}

		$dismissed = (int) get_user_meta( $user_id, 'hey_feedback_review_dismissed_milestone', true );
		if ( $dismissed >= $current ) {
			return;
		}

		$messages = array(
			5  => sprintf(
				/* translators: %d: response count */
				__( "You've collected %d responses with Hey! Feedback! If you're enjoying it, a quick review would mean a lot.", 'hey-feedback' ),
				$count
			),
			20 => sprintf(
				/* translators: %d: response count */
				__( '%d responses collected! Your review helps other WordPress users discover Hey! Feedback.', 'hey-feedback' ),
				$count
			),
			75 => sprintf(
				/* translators: %d: response count */
				__( "Wow, %d responses! You're a feedback pro. A review on WordPress.org would really help us grow.", 'hey-feedback' ),
				$count
			),
		);

		$message   = $messages[ $current ];
		$review_url = 'https://wordpress.org/support/plugin/hey-feedback/reviews/#new-post';
		$rest_url   = esc_url_raw( rest_url( 'hey-feedback/v1/admin/review-action' ) );
		$nonce      = wp_create_nonce( 'wp_rest' );
		?>
		<div class="notice notice-info is-dismissible hfb-review-notice" id="hfb-review-notice">
			<p>
				<?php echo esc_html( $message ); ?>
			</p>
			<p>
				<a href="<?php echo esc_url( $review_url ); ?>" target="_blank" rel="noopener" class="button button-primary" id="hfb-review-rate">
					<?php esc_html_e( 'Rate Hey! Feedback ★★★★★', 'hey-feedback' ); ?>
				</a>
				<a href="#" class="button button-link" id="hfb-review-later">
					<?php esc_html_e( 'Maybe later', 'hey-feedback' ); ?>
				</a>
				<a href="#" class="button button-link" id="hfb-review-already">
					<?php esc_html_e( 'I already reviewed', 'hey-feedback' ); ?>
				</a>
			</p>
		</div>
		<?php
		wp_register_script( 'hey-feedback-review-notice', false, array(), HEY_FEEDBACK_VERSION, true );
		wp_enqueue_script( 'hey-feedback-review-notice' );
		wp_localize_script( 'hey-feedback-review-notice', 'heyFeedbackReview', array(
			'url'       => $rest_url,
			'nonce'     => $nonce,
			'milestone' => $current,
		) );
		wp_add_inline_script(
			'hey-feedback-review-notice',
			'(function(){' .
				'function send(a){' .
					'var el=document.getElementById("hfb-review-notice");' .
					'if(el)el.style.display="none";' .
					'fetch(heyFeedbackReview.url,{' .
						'method:"POST",' .
						'headers:{"X-WP-Nonce":heyFeedbackReview.nonce,"Content-Type":"application/json"},' .
						'credentials:"same-origin",' .
						'body:JSON.stringify({action:a,milestone:heyFeedbackReview.milestone})' .
					'});' .
				'}' .
				'document.getElementById("hfb-review-rate").addEventListener("click",function(){send("reviewed");});' .
				'document.getElementById("hfb-review-later").addEventListener("click",function(e){e.preventDefault();send("later");});' .
				'document.getElementById("hfb-review-already").addEventListener("click",function(e){e.preventDefault();send("reviewed");});' .
				'var n=document.getElementById("hfb-review-notice");' .
				'if(n){' .
					'var o=new MutationObserver(function(ml){' .
						'ml.forEach(function(m){' .
							'if(m.type==="attributes"&&n.style.display==="none"){send("dismiss");o.disconnect();}' .
						'});' .
					'});' .
					'o.observe(n,{attributes:true,attributeFilter:["style"]});' .
				'}' .
			'})();'
		);
	}

	public function register_admin_menu() {
		$admin = new Admin\Admin();
		$admin->register_menu();
	}

	public function enqueue_admin_assets( $hook_suffix ) {
		$is_dashboard  = 'toplevel_page_hey-feedback' === $hook_suffix;
		$is_widgets    = 'hey-feedback_page_hey-feedback-widgets' === $hook_suffix;
		$is_settings   = 'hey-feedback_page_hey-feedback-settings' === $hook_suffix;
		$is_onboarding = 'admin_page_hey-feedback-welcome' === $hook_suffix;

		if ( $is_onboarding ) {
			$this->enqueue_onboarding_assets();
			return;
		}

		if ( ! $is_dashboard && ! $is_widgets && ! $is_settings ) {
			return;
		}

		wp_enqueue_style(
			'hey-feedback-admin',
			HEY_FEEDBACK_URL . 'assets/css/admin.css',
			array(),
			HEY_FEEDBACK_VERSION
		);

		$types_data = array();
		foreach ( $this->type_registry->get_all() as $type ) {
			$types_data[] = array(
				'id'              => $type->get_id(),
				'label'           => $type->get_label(),
				'defaultSettings' => $type->get_default_settings(),
				'settingsSchema'  => $type->get_settings_schema(),
			);
		}

		$conditions_data = array();
		foreach ( $this->condition_evaluator->get_all() as $condition ) {
			$conditions_data[] = array(
				'id'             => $condition->get_id(),
				'label'          => $condition->get_label(),
				'settingsSchema' => $condition->get_settings_schema(),
			);
		}

		$localize_data = array(
			'restUrl'       => esc_url_raw( rest_url( 'hey-feedback/v1/' ) ),
			'adminUrl'      => esc_url_raw( admin_url() ),
			'nonce'         => wp_create_nonce( 'wp_rest' ),
			'feedbackTypes' => $types_data,
			'conditions'    => $conditions_data,
		);

		/**
		 * Filters the admin localize data passed to heyFeedbackAdmin JS object.
		 *
		 * @param array  $localize_data Data to localize.
		 * @param string $hook_suffix   Current admin page hook suffix.
		 */
		$localize_data = apply_filters( 'hey_feedback_admin_localize', $localize_data, $hook_suffix );

		if ( $is_dashboard ) {
			$user_id = get_current_user_id();
			$localize_data['showOptinBanner'] = ! get_user_meta( $user_id, 'hey_feedback_subscribed', true )
				&& ! get_user_meta( $user_id, 'hey_feedback_optin_dismissed', true );

			wp_enqueue_script(
				'hey-feedback-dashboard',
				HEY_FEEDBACK_URL . 'assets/js/dashboard.js',
				array(),
				HEY_FEEDBACK_VERSION,
				true
			);
			wp_localize_script( 'hey-feedback-dashboard', 'heyFeedbackAdmin', $localize_data );
		}

		if ( $is_widgets ) {
			wp_enqueue_style(
				'hey-feedback-front',
				HEY_FEEDBACK_URL . 'assets/css/frontend.css',
				array(),
				HEY_FEEDBACK_VERSION
			);

			wp_enqueue_script(
				'hey-feedback-admin',
				HEY_FEEDBACK_URL . 'assets/js/admin.js',
				array(),
				HEY_FEEDBACK_VERSION,
				true
			);
			wp_localize_script( 'hey-feedback-admin', 'heyFeedbackAdmin', $localize_data );
		}

		if ( $is_settings ) {
			wp_enqueue_script(
				'hey-feedback-settings',
				HEY_FEEDBACK_URL . 'assets/js/settings.js',
				array(),
				HEY_FEEDBACK_VERSION,
				true
			);
			wp_localize_script( 'hey-feedback-settings', 'heyFeedbackAdmin', $localize_data );
		}
	}

	private function enqueue_onboarding_assets() {
		$types_data = array();
		foreach ( $this->type_registry->get_all() as $type ) {
			$types_data[] = array(
				'id'              => $type->get_id(),
				'label'           => $type->get_label(),
				'defaultSettings' => $type->get_default_settings(),
				'settingsSchema'  => $type->get_settings_schema(),
			);
		}

		wp_enqueue_style(
			'hey-feedback-onboarding',
			HEY_FEEDBACK_URL . 'assets/css/onboarding.css',
			array(),
			HEY_FEEDBACK_VERSION
		);

		wp_enqueue_style(
			'hey-feedback-front',
			HEY_FEEDBACK_URL . 'assets/css/frontend.css',
			array(),
			HEY_FEEDBACK_VERSION
		);

		wp_enqueue_script(
			'hey-feedback-onboarding',
			HEY_FEEDBACK_URL . 'assets/js/onboarding.js',
			array(),
			HEY_FEEDBACK_VERSION,
			true
		);

		wp_localize_script( 'hey-feedback-onboarding', 'heyFeedbackOnboarding', array(
			'restUrl'       => esc_url_raw( rest_url( 'hey-feedback/v1/' ) ),
			'nonce'         => wp_create_nonce( 'wp_rest' ),
			'feedbackTypes' => $types_data,
			'widgetsUrl'    => esc_url_raw( admin_url( 'admin.php?page=hey-feedback-widgets' ) ),
			'dashboardUrl'  => esc_url_raw( admin_url( 'admin.php?page=hey-feedback' ) ),
		) );
	}

	public function enqueue_frontend_assets() {
		if ( ! $this->has_active_widgets() ) {
			return;
		}

		wp_enqueue_style(
			'hey-feedback-front',
			HEY_FEEDBACK_URL . 'assets/css/frontend.css',
			array(),
			HEY_FEEDBACK_VERSION
		);

		wp_enqueue_script(
			'hey-feedback-front',
			HEY_FEEDBACK_URL . 'assets/js/frontend.js',
			array(),
			HEY_FEEDBACK_VERSION,
			true
		);

		$settings      = RestApi\SettingsController::get_all();
		$primary_color = $settings['primary_color'] ?? '#2271b1';
		wp_add_inline_style( 'hey-feedback-front', '.hey-feedback-widget,.hey-feedback-floating{--hfb-primary:' . esc_attr( $primary_color ) . '}' );

		$frontend_config = array(
			'restUrl' => esc_url_raw( rest_url( 'hey-feedback/v1/' ) ),
			'nonce'   => wp_create_nonce( 'wp_rest' ),
			'pageId'  => get_queried_object_id(),
			'pageUrl' => esc_url_raw( home_url( add_query_arg( array() ) ) ),
		);

		/**
		 * Filters the frontend JS configuration object.
		 *
		 * @param array $config Frontend config passed to heyFeedback JS object.
		 */
		$frontend_config = apply_filters( 'hey_feedback_frontend_config', $frontend_config );

		wp_localize_script( 'hey-feedback-front', 'heyFeedback', $frontend_config );
	}

	/**
	 * Auto-inject widgets via wp_footer based on condition rules.
	 */
	public function render_widgets() {
		if ( ! $this->has_active_widgets() ) {
			return;
		}

		echo '<div id="hey-feedback-root"></div>';

		/**
		 * Fires after the feedback root element is rendered in the footer.
		 */
		do_action( 'hey_feedback_after_root' );
	}

	/**
	 * Ensures the digest cron event matches the current setting.
	 */
	public function schedule_digest() {
		$settings  = RestApi\SettingsController::get_all();
		$frequency = $settings['digest_frequency'] ?? 'off';
		$hook      = 'hey_feedback_send_digest';

		$scheduled = wp_get_schedule( $hook );

		if ( 'off' === $frequency ) {
			if ( $scheduled ) {
				wp_clear_scheduled_hook( $hook );
			}
			return;
		}

		if ( $scheduled !== $frequency ) {
			wp_clear_scheduled_hook( $hook );
			wp_schedule_event( time(), $frequency, $hook );
		}
	}

	/**
	 * Sends a digest email summarising responses since the last digest.
	 */
	public function send_digest_email() {
		$settings  = RestApi\SettingsController::get_all();
		$frequency = $settings['digest_frequency'] ?? 'off';
		if ( 'off' === $frequency ) {
			return;
		}

		$last_sent = get_option( 'hey_feedback_last_digest', 0 );
		$since     = $last_sent ? gmdate( 'Y-m-d H:i:s', $last_sent ) : gmdate( 'Y-m-d H:i:s', strtotime( '-1 week' ) );

		global $wpdb;
		$responses_table = Database::responses_table();
		$items_table     = Database::items_table();

		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$rows = $wpdb->get_results(
			$wpdb->prepare(
				"SELECT i.title AS widget_title, i.id AS widget_id, COUNT(*) AS cnt
				 FROM %i r
				 INNER JOIN %i i ON i.id = r.widget_id
				 WHERE r.created_at > %s
				 GROUP BY r.widget_id
				 ORDER BY cnt DESC",
				$responses_table,
				$items_table,
				$since
			)
		);

		if ( empty( $rows ) ) {
			update_option( 'hey_feedback_last_digest', time() );
			return;
		}

		$total = 0;
		$lines = array();
		foreach ( $rows as $row ) {
			$title   = $row->widget_title ?: ( __( 'Widget', 'hey-feedback' ) . ' #' . $row->widget_id );
			$lines[] = sprintf( '  %s: %d', $title, $row->cnt );
			$total  += (int) $row->cnt;
		}

		$blog    = get_bloginfo( 'name' );
		$period  = 'daily' === $frequency ? __( 'daily', 'hey-feedback' ) : __( 'weekly', 'hey-feedback' );
		$subject = sprintf(
			/* translators: 1: site name, 2: total count */
			__( '[%1$s] Feedback digest — %2$d new responses', 'hey-feedback' ),
			$blog,
			$total
		);
		$body = sprintf(
			/* translators: 1: period (daily/weekly), 2: site name, 3: response lines */
			__( "%1\$s feedback digest for %2\$s\n\n%3\$s\n\nTotal: %4\$d", 'hey-feedback' ),
			ucfirst( $period ),
			$blog,
			implode( "\n", $lines ),
			$total
		);

		wp_mail( get_option( 'admin_email' ), $subject, $body );
		update_option( 'hey_feedback_last_digest', time() );
	}

	/**
	 * Checks whether any active widgets exist. Result is cached per request.
	 *
	 * @return bool
	 */
	private function has_active_widgets(): bool {
		static $has = null;

		if ( null !== $has ) {
			return $has;
		}

		global $wpdb;
		$table = Database::items_table();

		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$count = (int) $wpdb->get_var(
			$wpdb->prepare(
				"SELECT COUNT(*) FROM %i WHERE status = %s",
				$table,
				'active'
			)
		);

		$has = $count > 0;
		return $has;
	}
}