<?php

namespace Automattic\P2\Themes\P2020\Drafts_Index;

class Drafts_Index {
	public static function init() {
		// Do not load if we're not inside the drafts index.
		if ( ! self::is_drafts_index_active() ) {
			return;
		}

		add_filter( 'wp_enqueue_scripts', array( __CLASS__, 'enqueue_scripts' ) );
		add_filter( 'frontpage_template', array( __CLASS__, 'load_custom_home_template' ), PHP_INT_MAX );
		add_filter( 'body_class', array( __CLASS__, 'custom_body_class' ) );
		add_filter( 'o2_options', array( __CLASS__, 'customize_o2_options' ) );
		add_action( 'after_setup_theme', array( __CLASS__, 'remove_infinite_scroll' ), 11 );

		// For performance, turn off what we can.
		add_filter( 'p2_inline_terms_disabled', '__return_true' );
		add_filter( 'jetpack_mentions_should_load_ui', '__return_false', 99 );
		add_filter( 'o2_should_process_terms', '__return_false', 99 );
		add_filter( 'posts_pre_query', array( __CLASS__, 'skip_post_query' ), 10, 2 );
		add_filter( 'p2_glossary_enabled', '__return_false' );
	}

	public static function enqueue_scripts() {
		wp_enqueue_script(
			'p2020-drafts-index-post-actions-js',
			get_template_directory_uri() . '/inc/drafts-index/js/post-actions.js',
			[ 'jquery' ],
			(string) filemtime( get_template_directory() . '/inc/drafts-index/js/post-actions.js' ),
			true
		);
		wp_set_script_translations( 'p2020-drafts-index-post-actions-js', 'p2020', get_template_directory() . '/languages' );
	}

	/**
	 * Filter: posts_pre_query
	 */
	public static function skip_post_query( ?array $posts, \WP_Query $wp_query ) {
		if ( $wp_query->is_main_query() ) {
			$wp_query->set( 'cache_results', false );
			return [];
		}

		return $posts;
	}

	/**
	 * Filter: home_template
	 */
	public static function load_custom_home_template() {
		return get_template_directory() . '/inc/drafts-index/templates/tpl-drafts-index.php';
	}

	public static function custom_body_class( $classes ) {
		// Add special drafts index class.
		$classes[] = 'is-drafts-index';

		// Remove 'home' class.
		return array_diff( $classes, [ 'home' ] );
	}

	public static function remove_infinite_scroll() {
		remove_theme_support( 'infinite-scroll' );
	}

	public static function customize_o2_options( array $o2_options ) {
		$o2_options['options']['infiniteScroll']       = false;
		$o2_options['options']['hideAppControls']      = true;
		$o2_options['options']['showFrontSidePostBox'] = false;
		$o2_options['options']['viewType']             = 'archive';

		return $o2_options;
	}

	public static function get_drafts() {
		$drafts_query = new \WP_Query(
			[
				'post_status'    => 'draft',

				// Limit for better performance.
				'posts_per_page' => 100,

				'author'         => get_current_user_id(),
				'orderby'        => 'modified',
				'order'          => 'DESC',
			]
		);

		return $drafts_query->posts;
	}

	public static function is_drafts_index_active(): bool {
		return isset( $_GET['drafts'] );
	}
}