<?php

if ( ! defined( 'VPHQ_ROOT' ) ) {
	define( 'VPHQ_ROOT', get_template_directory() );
}

require_once VPHQ_ROOT . '/version.php';

require_once VPHQ_ROOT . '/class.videopress-hq-caps.php';
require_once VPHQ_ROOT . '/class.videopress-hq.php';
require_once VPHQ_ROOT . '/class.videopress-hq-admin.php';

$videopress_hq       = new VideoPressHQ();
$videopress_hq_admin = new VideoPressHQAdmin();

/**
 * Translates and renders the view count label.
 *
 * @param string $count The view count.
 * @return string The view count label text.
 */
function format_view_count( $count ) {
	return sprintf(
		/* translators: The number of views of a video. %s: A number */
		_n( '%s view', '%s views', $count ),
		$count
	);
}

/**
 * Queries for the view stat for a post and renders the label.
 * @param int $post_id the post id of the page that hosts the video to get the stat for.
 * @param bool $autoformat (optional) Whether to autoformat the view count.
 * @return string|int The view count or the label text if $autoformat is false.
 */
function render_stat( $post_id, $autoformat = true ) {
	global $wpdb;

	if ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) {
		return $autoformat ? format_view_count( 0 ) : 0;
	}

	$video_guid = get_post_meta( $post_id, 'guid', true );

	if ( empty( $video_guid ) ) {
		return $autoformat ? format_view_count( 0 ) : 0;
	}

	$video_plays_cache_key = sprintf( 'vphq-plays-%s', $video_guid );

	$count = wp_cache_get( $video_plays_cache_key );

	if ( is_numeric( $count ) ) {
		return $autoformat ? format_view_count( $count ) : $count;
	}

	$video_details = videopress_hq_get_video_details( $video_guid );

	$plays = $wpdb->get_var(
		$wpdb->prepare(
			'SELECT SUM( plays ) as plays
			FROM video_stats
			WHERE blog_id=%d AND post_id=%d',
			$video_details->blog_id,
			$video_details->post_id,
		),
	);

	if ( ! is_numeric( $plays ) ) {
		$plays = 0;
	}

	$count = intval( $plays );
	wp_cache_set( $video_plays_cache_key, $count, '', 60 ); // 1 minute expiry

	return $autoformat ? format_view_count( $count ) : $count;
}

function render_playlist_stat( $playlist, $autoformat = true ) {
	global $wpdb;

	if ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) {
		return $autoformat ? format_view_count( 0 ) : 0;
	}

	$blog_id               = get_current_blog_id();
	$video_plays_cache_key = sprintf( 'vphq-plays-playlist-%d-%d', $blog_id, $playlist->term->term_id );

	$count = wp_cache_get( $video_plays_cache_key );

	if ( is_numeric( $count ) ) {
		return $autoformat ? format_view_count( $count ) : $count;
	}

	$query    = $playlist->get_posts_query( array( 'fields' => 'ids' ) );
	$post_ids = $query->get_posts();

	array_filter( $post_ids, 'is_numeric' );

	if ( empty( $post_ids ) ) {
		wp_cache_set( $video_plays_cache_key, 0, '', 60 );
		return $autoformat ? format_view_count( 0 ) : 0;
	}

	$count = 0;
	foreach ( $post_ids as $post_id ) {
		$count += render_stat( $post_id, false );
	}

	wp_cache_set( $video_plays_cache_key, $count, '', 600 ); // 10 minute expiry

	return $autoformat ? format_view_count( $count ) : $count;
}

function generate_embed_url( $guid, array $options = array() ) {
	$options  = array_merge(
		array(
			'resizeToParent'  => true,
			'cover'           => false,
			'preloadContent'  => 'metadata',
			'useAverageColor' => true,
		),
		$options
	);
	$base_url = 'https://video.wordpress.com/v/' . esc_attr( $guid );
	foreach ( $options as $key => $value ) {
		if ( true === $value ) {
			$value = 'true';
		} elseif ( false === $value ) {
			$value = 'false';
		}

		$base_url = add_query_arg( $key, $value, $base_url );
	}
	return $base_url;
}

function vphq_get_custom_admin_pages() {
	return array(
		'dashboard'            => 'index.php?vp-custom-page=dashboard',
		'videos'               => 'index.php?vp-custom-page=manage-videos',
		'playlist/new'         => 'index.php?vp-custom-page=edit-playlist',
		'categories'           => 'index.php?vp-custom-page=manage-categories',
		'appearance'           => 'index.php?vp-custom-page=appearance',
		'comments'             => 'index.php?vp-custom-page=manage-comments',
		'onboarding/upload'    => array(
			'rule'      => 'index.php?vp-custom-page=onboarding-upload',
			'no_prefix' => true,
		),
		'onboarding'           => array(
			'rule'      => 'index.php?vp-custom-page=onboarding',
			'no_prefix' => true,
		),
		'onboarding/customize' => array(
			'rule'      => 'index.php?vp-custom-page=onboarding-customize',
			'no_prefix' => true,
		),
		'onboarding/clear'     => array(
			'rule'      => 'index.php?vp-custom-page=onboarding-clear',
			'no_prefix' => true,
		),
		'video/edit'           => array(
			'rule'        => array(
				'pattern' => 'video/(\\d+)',
				'rewrite' => 'index.php?post_type=vp_video&p=$matches[1]&vp-custom-page=edit',
			),
			'rewrite_url' => 'video/%d',
			'raw_url'     => 'index.php?post_type=vp_video&p=%d&vp-custom-page=edit',
		),
		'playlists'            => 'index.php?vp-custom-page=manage-playlists',
		'playlist/edit'        => array(
			'rule'        => array(
				'pattern' => 'playlist/(\\d+)',
				'rewrite' => 'index.php?vp-custom-page=edit-playlist&playlist_id=$matches[1]',
			),
			'rewrite_url' => 'playlist/%d',
			'raw_url'     => 'index.php?vp-custom-page=edit-playlist&playlist_id=%d',
		),
		// This is matching (and redirecting to) the "comments" rule, so no rewrite rule is needed for this one.
		'comments-by-post'     => array(
			'rewrite_url' => 'comments/?post_id=%d',
			'raw_url'     => 'index.php?vp-custom-page=manage-comments&post_id=%d',
		),
	);
}

function vphq_relative_admin_page_link( $page, ...$args ) {
	$pages = vphq_get_custom_admin_pages();
	if ( ! isset( $pages[ $page ] ) ) {
		return '';
	}

	$admin_page = $pages[ $page ];
	if ( is_string( $admin_page ) ) {
		return get_option( 'permalink_structure' ) ? ( '/manage/' . $page ) : ( '/' . $admin_page );
	}

	if ( ! get_option( 'permalink_structure' ) ) {
		$raw_url = $admin_page['raw_url'] ?? $admin_page['rule'];
		return is_string( $raw_url ) ? ( '/' . sprintf( $raw_url, ...$args ) ) : '';
	}

	$prefix      = isset( $admin_page['no_prefix'] ) && $admin_page['no_prefix'] ? '/' : '/manage/';
	$rewrite_url = $admin_page['rewrite_url'] ?? $page;

	return $prefix . sprintf( $rewrite_url, ...$args );
}

function vphq_admin_page_link( $page, ...$args ) {
	$relative_link = vphq_relative_admin_page_link( $page, ...$args );
	if ( empty( $relative_link ) ) {
		return '';
	}
	return home_url( $relative_link );
}

function get_edit_video_link( $post_id ) {
	return vphq_admin_page_link( 'video/edit', $post_id );
}

function get_edit_playlist_link( $playlist_id ) {
	return vphq_admin_page_link( 'playlist/edit', $playlist_id );
}

function get_video_post_thumbnail( $post_id, $format ) {
	$video_guid     = get_post_meta( $post_id, 'guid', true );
	$post_thumbnail = get_the_post_thumbnail_url( $post_id, $format );

	if ( empty( $post_thumbnail ) && ! empty( $video_guid ) ) {
		$video_details = videopress_hq_get_video_details( $video_guid );
		if ( $video_details ) {
			$post_thumbnail = $video_details->poster ?? '';
		}
	}

	return $post_thumbnail;
}

function videopress_hq_get_video_details( $video_guid ) {
	if ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) {
		$video_details = videopress_get_video_details( $video_guid );
		if ( ! $video_details ) {
			return $video_details;
		}

		// JETPACK override - transient is cached, and if its missing poster it won't have it for an hour, so clear it and try again.
		if ( empty( $video_details->poster ) ) {
			delete_transient( 'jetpack_videopress_' . $video_guid, false );
			$video_details = videopress_get_video_details( $video_guid );
		}
		return $video_details;
	} else {
		// The following wpcom checks, fields and their values are taken from `video_get_single_response` in `wp-content/mu-plugins/videopress/get.php`
		if ( ! videopress_is_valid_guid( $video_guid ) ) {
			return new WP_Error( 'bad-guid-format', __( 'Invalid Video GUID!', 'jetpack' ) );
		}

		$video_info = video_get_info_by_guid( $video_guid );

		if ( false === $video_info ) {
			return $video_info;
		}

		$thumbnail   = video_highest_resolution_image( $video_info );
		$poster      = ( $thumbnail ) ? jetpack_photon_url( video_cdn_file_url( $video_info->guid, video_highest_resolution_image( $video_info ) ) ) : null;
		$video_title = $video_info->title ?? video_get_title( $video_info->blog_id, $video_info->post_id );

		if ( $video_info->duration_milliseconds ) {
			$duration = $video_info->duration_milliseconds;
		} else {
			$duration = floatval( $video_info->duration ) * 1000;
		}

		// This list of params is based on what we are currently using in videopress-hq, in an attempt to cut out the inefficiency of all
		//  the extra processing that occurs when calling `videopress_get_video_details` on wpcom which is needed for the player, but not for
		//  rendering video previews in HQ.
		$response = array(
			'blog_id'  => intval( $video_info->blog_id ),
			'post_id'  => intval( $video_info->post_id ),
			'title'    => $video_title,
			'poster'   => $poster,
			'duration' => $duration,
		);

		return (object) $response;
	}
}

function videopress_hq_is_video_upload_allowed() {
	if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
		require_lib( 'videopress' );
		return VideoPress\videopress_hq_site_can_upload_video( get_current_blog_id() );
	}

	return true;
}

function videopress_hq_render_upgrade_prompt() {
	// Todo: change link to actual VPHQ plan
	?>
	<div class="videopress-hq__upgrade-prompt">
		<a class="wp-block-button__link wp-element-button" href="https://wordpress.com/plans"><?php esc_html_e( 'Upgrade' ); ?></a>
		<p><?php esc_html_e( 'Trial limit reached. Upgrade your plan now to upload more videos.' ); ?></p>
	</div>
	<?php
}

function videopress_hq_is_current_user_blog_owner() {
	if ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) {
		return false;
	}

	$owner = (int) wpcom_get_blog_owner( get_current_blog_id() );
	return $owner && get_current_user_id() === $owner;
}

function sanitize_hex_color_with_alpha( $color ) {
	if ( ! is_string( $color ) || empty( $color ) ) {
		return null;
	}

	// 3 or 6 or 8 hex digits, or the empty string.
	if ( ! preg_match( '/^#([a-f0-9]{3}|[a-f0-9]{6}|[a-f0-9]{8})$/i', $color ) ) {
		return null;
	}

	return $color;
}

function vphq_get_site_custom_colors() {
	if ( is_multisite() ) {
		return get_blog_option( get_current_blog_id(), 'vphq-custom-colors', false );
	}
	return get_option( 'vphq-custom-colors', false );
}

function vphq_update_site_custom_colors( array $colors ) {
	if ( is_multisite() ) {
		return update_blog_option( get_current_blog_id(), 'vphq-custom-colors', $colors );
	}
	return update_option( 'vphq-custom-colors', $colors );
}

/**
 * This is meant to be used when the video url is returned in an admin-ajax response and NOT being rendered directly on the page which is handled by existing wpcom code on render.
 * In cases like this, we need to provide the metadata token if the site is private or it is an active trial.
 *
 * @param string $guid
 * @return string|bool The metadata token if required, false otherwise.
 */
function vphq_get_metadata_token_if_required( $guid ) {
	if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
		$video_info = video_get_info_by_guid( $guid );

		// some logic borrowed from wp-content/mu-plugins/videopress/helpers.php
		// need to support trial mode AND plan + private video so we:
		// 1) check if the video is private, and if the current user has permission to view
		// 2) check if the HQ says we can serve the video (plan or trial + site owner is viewing)
		if ( video_is_private( $video_info ) && is_private_blog_user( $video_info->blog_id, wp_get_current_user() ) ) {
			require_lib( 'videopress' );

			if ( VideoPress\videopress_hq_site_can_serve_video( $video_info->blog_id, get_current_user_id() ) ) {
				return \video_generate_auth_token( $video_info );
			}
		}
	}

	return false;
}

/**
 * Retrieves admin url for front-end requests.
 *
 * @param mixed $original_path The path you want the admin url for
 * @return string The admin url
 */
function vphq_get_admin_url( $original_path ) {
	global $blog_id;

	if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
		$path = ltrim( $original_path, '/' );

		$site_url         = get_site_url( $blog_id );
		$site_domain_only = parse_url( $site_url, PHP_URL_HOST );
		$domain_mapping   = get_primary_redirect( $blog_id );

		if ( ! empty( $domain_mapping ) && $domain_mapping !== $site_domain_only ) {
			return "https://{$domain_mapping}/wp-admin/$path";
		}
	}

	return admin_url( $original_path );
}