<?php
/**
 * Lynkora_CLI
 *
 *   wp lynkora scan
 *   wp lynkora report <orphans|dead-ends|broken|deep|mentions|all> [--format=<format>]
 *
 * @package Lynkora
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Find orphaned pages, dead ends and broken internal links.
 */
class Lynkora_CLI {

	/**
	 * Rebuild the link index from scratch.
	 *
	 * ## EXAMPLES
	 *
	 *     wp lynkora scan
	 */
	public function scan() {
		$indexer = new Lynkora_Indexer();
		$state   = $indexer->start_scan();

		$progress = WP_CLI\Utils\make_progress_bar( 'Reading links', max( 1, $state['total'] ) );
		$done     = 0;

		while ( 'posts' === $state['phase'] ) {
			$state = $indexer->step();
			$progress->tick( $state['offset'] - $done );
			$done = $state['offset'];
		}
		$progress->finish();

		$unchecked = Lynkora_DB::count_unchecked();
		if ( $unchecked ) {
			WP_CLI::log( sprintf( 'Checking %d addresses that are not pages or posts...', $unchecked ) );
		}
		while ( 'check' === $state['phase'] ) {
			$state = $indexer->step();
		}

		$report = new Lynkora_Report();
		$totals = $report->totals( Lynkora_Settings::get()['depth'] );

		WP_CLI::success(
			sprintf(
				'%d pages and posts, %d internal links. Orphans: %d. Dead ends: %d. Broken links: %d. Hard to reach: %d.',
				$totals['content'],
				$totals['links'],
				$totals['orphans'],
				$totals['dead_ends'],
				$totals['broken'],
				$totals['deep']
			)
		);
	}

	/**
	 * Print a report from the current index.
	 *
	 * ## OPTIONS
	 *
	 * <report>
	 * : Which report.
	 * ---
	 * options:
	 *   - orphans
	 *   - dead-ends
	 *   - broken
	 *   - deep
	 *   - mentions
	 *   - all
	 * ---
	 *
	 * [--format=<format>]
	 * : Output format.
	 * ---
	 * default: table
	 * options:
	 *   - table
	 *   - csv
	 *   - json
	 *   - count
	 * ---
	 *
	 * ## EXAMPLES
	 *
	 *     wp lynkora report orphans
	 *     wp lynkora report broken --format=csv > broken-links.csv
	 *
	 * @param array $args       Positional arguments.
	 * @param array $assoc_args Named arguments.
	 */
	public function report( $args, $assoc_args ) {
		if ( ! Lynkora_Indexer::get_state()['finished'] ) {
			WP_CLI::error( 'No scan yet. Run "wp lynkora scan" first.' );
		}

		$report = new Lynkora_Report();
		$format = isset( $assoc_args['format'] ) ? $assoc_args['format'] : 'table';
		$depth  = Lynkora_Settings::get()['depth'];

		switch ( $args[0] ) {
			case 'broken':
				$fields = array( 'source', 'anchor', 'url', 'problem', 'new_url' );
				$items  = $report->broken();
				break;

			case 'mentions':
				$fields = array( 'page', 'mentioned_in', 'excerpt' );
				$items  = array();
				foreach ( $report->mentions() as $group ) {
					foreach ( $group['mentions'] as $mention ) {
						$items[] = array(
							'page'         => $group['title'],
							'mentioned_in' => $mention['title'],
							'excerpt'      => $mention['excerpt'],
						);
					}
				}
				break;

			default:
				$fields = array( 'id', 'title', 'type', 'inbound', 'outbound', 'depth' );
				switch ( $args[0] ) {
					case 'orphans':
						$items = $report->orphans();
						break;
					case 'dead-ends':
						$items = $report->dead_ends();
						break;
					case 'deep':
						$items = $report->deep( $depth );
						break;
					default:
						$items = array_values( $report->content() );
				}
				foreach ( $items as $i => $item ) {
					$items[ $i ]['depth'] = null === $item['depth'] ? 'not reachable' : $item['depth'];
				}
		}

		WP_CLI\Utils\format_items( $format, $items, $fields );
	}
}