<?php

namespace Automattic\P2\Themes\P2020;

use Automattic\P2\Plugins\Core as P2_Core;

class Compact_View {
	public static function init(): void {
		add_action( 'wp_enqueue_scripts', [ __CLASS__, 'enqueue_scripts' ] );

		add_filter( 'body_class', [ __CLASS__, 'body_class' ], 10, 3 );

		// The wp action is the earliest we can get a correct result from calling should_show_compact_view().
		// Set the priority so this runs early in the wp action.
		// TODO Check if this can't be moved to a filter
		add_action( 'wp', [ __CLASS__, 'notify_compact_view' ], 5 );

		add_filter( 'o2_filter_post_actions', [ __CLASS__, 'remove_o2_action_edit' ] );

		add_filter( 'o2_fragment_get_fragment_args', [ __CLASS__, 'o2_fragment_get_fragment_args' ] );

		// Must run after 'is_xpost' fragment data is already set.
		add_filter( 'o2_post_fragment', [ __CLASS__, 'format_post_preview' ], 11 );

		add_filter( 'p2_disable_xpost_hovercards', [ __CLASS__, 'disable_xpost_hovercards' ] );

		add_filter( 'p2_should_group_pinned_posts', [ __CLASS__, 'filter_should_group_pinned_posts' ], 10, 2 );
	}

	public static function enqueue_scripts(): void {
		if ( ! self::should_show_compact_view() ) {
			return;
		}

		wp_enqueue_script(
			'p2020-compact-view-js',
			get_template_directory_uri() . '/build/inc/compact-view/js/compact-view.js',
			[ 'jquery', 'wp-i18n' ],
			filemtime( __FILE__ ),
			true
		);
		wp_set_script_translations( 'p2020-compact-view-js', 'p2020', get_template_directory() . '/languages' );

		if ( self::is_compact_view_enabled() && ( is_home() || is_archive() ) ) {
			wp_enqueue_script(
				'p2020-compact-live-comments',
				get_template_directory_uri() . '/build/js/cocktails/live-comments.js',
				[ 'o2-cocktail', 'wp-i18n' ],
				filemtime( __FILE__ ),
				true
			);
			wp_set_script_translations( 'p2020-compact-live-comments', 'p2020', get_template_directory() . '/languages' );
		}
	}

	public static function notify_compact_view(): void {
		if ( self::should_show_compact_view() ) {
			do_action( 'p2020_compact_view_active' );
		}
	}

	/**
	 * @param string[] $classes
	 * @return string[]
	 */
	public static function body_class( array $classes ): array {
		if ( self::should_show_compact_view() ) {
			$classes[] = 'is-p2020-compact-view';
		}

		return $classes;
	}

	public static function is_default_mode_only() {
		return P2_Core\Filtering\View::is_filtering_active( 'comments' );
	}

	public static function is_feature_available() {
		return ! ( defined( 'REST_API_REQUEST' ) && REST_API_REQUEST ) &&
		! is_admin() && ! is_single() && ! is_page() && ! is_404() && ! self::is_default_mode_only();
	}

	public static function is_expanded_view_enabled() {
		return ! empty( $_COOKIE['showComments'] ) &&
		'false' !== $_COOKIE['showComments'];
	}

	public static function is_compact_view_enabled() {
		return self::is_feature_available()
		&& ! empty( $_COOKIE['showCompactView'] )
		&& 'false' !== $_COOKIE['showCompactView'];
	}

	public static function should_show_compact_view() {
		return self::is_feature_available() && self::is_compact_view_enabled();
	}

	/**
	 * @param array<int, array<string, mixed>> $actions
	 * @return array<int, array<string, mixed>>
	 */
	public static function remove_o2_action_edit( array $actions ): array {
		if ( ! self::should_show_compact_view() ) {
			return $actions;
		}

		return array_filter(
			$actions,
			function ( $action ) {
				return 'edit' !== $action['action'];
			}
		);
	}

	public static function get_post_content_preview( string $content, bool $is_xpost ): string {
		if ( ! $is_xpost ) {
			// No content preview for regular posts.
			return '';
		}

		// Get origin (+myp2) from string "X-post from +myp2 : My P2 Post Title".
		preg_match( '/((?:\+|&#0?43;)[\w]+)/', $content, $matches );
		if ( ! isset( $matches[1] ) ) {
			return $content;
		}

		return sprintf(
		/* Translators: %s is the name of a blog */
			_x( 'From %s', 'Post is from (blog name)', 'p2020' ),
			$matches[1]
		);
	}

	public static function get_post_title_preview( string $title, bool $is_xpost ): string {
		if ( $is_xpost ) {
			$title = preg_replace(
				'/X\-Post:|X\-Comment:/i',
				'',
				$title
			);
		}

		return $title;
	}

	/**
	 * @param array<string, mixed> $fragment
	 * @return array<string, mixed>
	 */
	public static function format_post_preview( array $fragment ): array {
		if ( ! self::should_show_compact_view() ) {
			return $fragment;
		}

		// Process post content preview.
		$fragment['contentPreview'] = self::get_post_content_preview(
			$fragment['contentRaw'],
			$fragment['is_xpost']
		);

		// Clear contentRaw as we no longer need it, and we'd rather not send it down.
		$fragment['contentRaw'] = '';

		// Process post title.
		$fragment['titleFiltered'] = self::get_post_title_preview(
			$fragment['titleFiltered'],
			$fragment['is_xpost']
		);

		if ( empty( trim( $fragment['titleFiltered'] ) ) ) {
			$fragment['isUntitled'] = true;
		}

		return $fragment;
	}

	public static function disable_xpost_hovercards( bool $setting ): bool {
		if ( self::should_show_compact_view() ) {
			return true;
		}

		return $setting;
	}

	/**
	 * @param array<string, mixed> $args
	 * @return array<string, mixed>
	 */
	public static function o2_fragment_get_fragment_args( array $args ): array {
		if ( self::should_show_compact_view() ) {
			$args['skip']['post'] = [
				'contentFiltered' => true,
				'mentions'        => true,
				'tags'            => true,
				'shortcodes'      => true,
				'comments'        => true,
			];
		}

		return $args;
	}

	/**
	 * Filter callback.
	 *
	 * Group pinned posts when in compact mode.
	 */
	public static function filter_should_group_pinned_posts( bool $should_group ): bool {
		if ( self::should_show_compact_view() ) {
			return true;
		}

		return $should_group;
	}
}