<?php
/**
 * Accesswell_Report
 *
 * Site-wide numbers from the saved page results, leaving out issues that
 * were reviewed and ignored.
 *
 * @package Accesswell
 */

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

class Accesswell_Report {

	/** @var array|null */
	private $pages = null;

	/**
	 * Checked pages with their open issues.
	 *
	 * @return array List of { url, path, post_id, checked_at, issues, ignored, errors, warnings, notices }.
	 */
	public function pages() {
		if ( null !== $this->pages ) {
			return $this->pages;
		}

		$ignored = Accesswell_Settings::ignored();
		$skip    = Accesswell_Settings::get()['skip_rules'];

		$this->pages = array();
		foreach ( Accesswell_DB::all() as $row ) {
			$path   = (string) Accesswell_Urls::path_of( $row['page_url'] );
			$open   = array();
			$hidden = 0;
			foreach ( $row['issues'] as $issue ) {
				if ( in_array( $issue['rule'], $skip, true ) || ! Accesswell_Rules::get( $issue['rule'] ) ) {
					continue;
				}
				if ( Accesswell_Settings::is_ignored( $issue, $path, $ignored ) ) {
					++$hidden;
					continue;
				}
				$open[] = $issue;
			}

			$counts = array(
				'error'   => 0,
				'warning' => 0,
				'notice'  => 0,
			);
			foreach ( $open as $issue ) {
				++$counts[ $issue['impact'] ];
			}

			$this->pages[] = array(
				'url'        => $row['page_url'],
				'path'       => $path,
				'post_id'    => (int) $row['post_id'],
				'checked_at' => $row['checked_at'],
				'issues'     => $open,
				'ignored'    => $hidden,
				'errors'     => $counts['error'],
				'warnings'   => $counts['warning'],
				'notices'    => $counts['notice'],
			);
		}

		usort(
			$this->pages,
			function ( $a, $b ) {
				return array( $b['errors'], $b['warnings'], $b['notices'] ) <=> array( $a['errors'], $a['warnings'], $a['notices'] );
			}
		);

		return $this->pages;
	}

	/**
	 * Issues grouped by rule across the site, most serious first.
	 *
	 * @return array Rule ID => { rule, count, pages: [ path => count ] }.
	 */
	public function by_rule() {
		$out = array();
		foreach ( $this->pages() as $page ) {
			foreach ( $page['issues'] as $issue ) {
				$id = $issue['rule'];
				if ( ! isset( $out[ $id ] ) ) {
					$out[ $id ] = array(
						'rule'  => Accesswell_Rules::get( $id ),
						'count' => 0,
						'pages' => array(),
					);
				}
				++$out[ $id ]['count'];
				$out[ $id ]['pages'][ $page['path'] ] = isset( $out[ $id ]['pages'][ $page['path'] ] ) ? $out[ $id ]['pages'][ $page['path'] ] + 1 : 1;
			}
		}

		$rank = array(
			'error'   => 0,
			'warning' => 1,
			'notice'  => 2,
		);
		uasort(
			$out,
			function ( $a, $b ) use ( $rank ) {
				return array( $rank[ $a['rule']['impact'] ], -count( $a['pages'] ), -$a['count'] ) <=> array( $rank[ $b['rule']['impact'] ], -count( $b['pages'] ), -$b['count'] );
			}
		);
		return $out;
	}

	/**
	 * @return array
	 */
	public function totals() {
		$t = array(
			'pages'       => 0,
			'with_errors' => 0,
			'errors'      => 0,
			'warnings'    => 0,
			'notices'     => 0,
			'last'        => '',
		);
		foreach ( $this->pages() as $page ) {
			++$t['pages'];
			$t['errors']   += $page['errors'];
			$t['warnings'] += $page['warnings'];
			$t['notices']  += $page['notices'];
			if ( $page['errors'] ) {
				++$t['with_errors'];
			}
			if ( $page['checked_at'] > $t['last'] ) {
				$t['last'] = $page['checked_at'];
			}
		}
		return $t;
	}
}