<?php
/**
 * Builds the JSON state the admin app renders (overview, scanner, handled log).
 *
 * @package GoConsent
 */

namespace GoConsent\Admin;

use GoConsent\Cron;
use GoConsent\Plugin;
use GoConsent\Rules\Laws;

defined( 'ABSPATH' ) || exit;

/**
 * Admin state payload.
 */
class State {

	/**
	 * Build the payload.
	 *
	 * @param Plugin $plugin Plugin.
	 * @return array
	 */
	public static function build( Plugin $plugin ) {
		$s      = $plugin->settings;
		$report = $plugin->report;
		$scan   = $plugin->scanner->last();
		$open   = $report->open();
		$counts = array(
			'critical' => 0,
			'warning'  => 0,
			'info'     => 0,
		);
		$issues = array();
		foreach ( $open as $i ) {
			++$counts[ $i['severity'] ];
			$i['wording'] = ( isset( $i['fix']['type'] ) && 'wording' === $i['fix']['type'] ) ? $report->wording->get( $i['id'] ) : null;
			$issues[]     = $i;
		}

		$handled = array();
		foreach ( $report->handled() as $id => $h ) {
			$handled[] = array(
				'id'     => $id,
				'title'  => $h['title'],
				'how'    => $h['how'],
				'reason' => $h['reason'],
				'user'   => $h['user'],
				'when'   => sprintf(
					/* translators: %s: time difference, e.g. "5 mins". */
					__( '%s ago', 'goconsent' ),
					human_time_diff( (int) $h['time'] )
				),
			);
		}

		$over      = (array) $s->get( 'overrides' );
		$approvals = Approvals::all();
		$items     = array();
		foreach ( $scan['items'] as $id => $it ) {
			$cat      = isset( $over[ $id ] ) ? $over[ $id ] : $it['default'];
			$approved = null;
			if ( isset( $approvals[ $id ], $over[ $id ] ) ) {
				$a        = $approvals[ $id ];
				$user     = get_userdata( (int) $a['user'] );
				$approved = array(
					'by'   => $user ? $user->display_name : __( 'a former user', 'goconsent' ),
					'when' => wp_date( get_option( 'date_format' ), (int) $a['time'] ),
				);
			}
			$sources = array();
			foreach ( isset( $it['sources'] ) ? (array) $it['sources'] : array() as $src ) {
				$sources[] = self::source_note( $src );
			}
			$items[] = array(
				'id'       => $id,
				'label'    => $it['label'],
				'match'    => $it['match'],
				'kind'     => $it['kind'],
				'pages'    => array_slice( $it['pages'], 0, 5 ),
				'more'     => max( 0, count( $it['pages'] ) - 5 ),
				'category' => $cat ? $cat : 'marketing',
				'review'   => empty( $it['known'] ) && ! isset( $over[ $id ] ),
				'approved' => $approved,
				'sources'  => $sources,
			);
		}

		$next = wp_next_scheduled( Cron::SCAN );
		$loc  = (string) $s->get( 'location' );
		$rule = $loc ? Laws::rule_for( $loc ) : null;

		return array(
			'rescan'     => ! empty( $scan['items'] ) && ! self::has_sources( $scan['items'] ),
			'score'      => $report->score(),
			'counts'     => $counts,
			'issues'     => $issues,
			'handled'    => $handled,
			'items'      => $items,
			'scan'       => array(
				'when'  => $scan['time'] ? human_time_diff( $scan['time'] ) : '',
				'pages' => count( $scan['pages'] ),
				'next'  => $next ? human_time_diff( $next ) : '',
			),
			'banner'     => array(
				'mode'     => (string) $s->get( 'banner_mode' ),
				'blockers' => \GoConsent\Frontend\BannerMode::blockers( $s ),
			),
			'enforcing'  => $s->enforcing(),
			'enforce_at' => wp_date( get_option( 'time_format' ) . ', ' . get_option( 'date_format' ), $s->enforce_at() ),
			'version'    => (int) $s->get( 'version' ),
			'law'        => $rule && $rule['law'] ? $rule['law'] : '',
			'protecting' => $plugin->is_protecting(),
			'policy'     => self::policy_editor( (int) $s->privacy_page_id() ),
			'laws'       => self::laws( $s ),
			'pages'      => \GoConsent\Policies\Manager::all(),
			'codes'      => \GoConsent\Policies\Tags::report(),
			'pro'        => \GoConsent\Policies\Pages::pro(),
		);
	}

	/**
	 * Laws that apply now (ids) and soon (id => date), for the Laws tab and issue links.
	 *
	 * @param \GoConsent\Settings $s Settings.
	 * @return array
	 */
	private static function laws( $s ) {
		$app  = new \GoConsent\Rules\Applicability( $s );
		$laws = $app->laws();
		$soon = array();
		foreach ( $laws['soon'] as $id => $l ) {
			$soon[ $id ] = wp_date( get_option( 'date_format' ), strtotime( $l['effective'] . ' 12:00:00' ) );
		}
		$names = array();
		foreach ( \GoConsent\Rules\Reference::all() as $id => $r ) {
			$names[ $id ] = $r['law'];
		}
		foreach ( $laws['now'] as $id => $l ) {
			$names[ $id ] = $l['short'];
		}
		return array(
			'now'   => array_keys( $laws['now'] ),
			'soon'  => $soon,
			'names' => $names,
		);
	}

	/**
	 * Where the privacy page is edited, and with what.
	 *
	 * @param int $id Privacy page id.
	 * @return array|null { edit: url, builder: blocks|classic|elementor|beaver }
	 */
	private static function policy_editor( $id ) {
		$post = $id ? get_post( $id ) : null;
		if ( ! $post || ! current_user_can( 'edit_post', $id ) ) {
			return null;
		}
		if ( 'builder' === get_post_meta( $id, '_elementor_edit_mode', true ) && defined( 'ELEMENTOR_VERSION' ) ) {
			return array(
				'edit'    => admin_url( 'post.php?post=' . $id . '&action=elementor' ),
				'builder' => 'elementor',
			);
		}
		if ( get_post_meta( $id, '_fl_builder_enabled', true ) && class_exists( 'FLBuilderModel' ) ) {
			return array(
				'edit'    => add_query_arg( 'fl_builder', '', get_permalink( $id ) ),
				'builder' => 'beaver',
			);
		}
		return array(
			'edit'    => (string) get_edit_post_link( $id, 'raw' ),
			'builder' => has_blocks( $post ) || use_block_editor_for_post( $post ) ? 'blocks' : 'classic',
		);
	}

	/**
	 * Whether the last scan recorded sources (scans before 1.0.6 didn't).
	 *
	 * @param array $items Scan items.
	 * @return bool
	 */
	private static function has_sources( array $items ) {
		foreach ( $items as $it ) {
			if ( array_key_exists( 'sources', $it ) ) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Plain-English note on what put a script on the page, plus an edit link where useful.
	 *
	 * @param array $src Source from the scanner.
	 * @return array{text:string,link:string,link_label:string,known:bool}
	 */
	public static function source_note( array $src ) {
		$name   = isset( $src['name'] ) ? (string) $src['name'] : '';
		$detail = isset( $src['detail'] ) ? (string) $src['detail'] : '';
		$out    = array(
			'text'       => '',
			'link'       => '',
			'link_label' => '',
			'known'      => true,
		);
		switch ( isset( $src['type'] ) ? $src['type'] : '' ) {
			case 'plugin':
				/* translators: %s: plugin name. */
				$out['text'] = sprintf( __( 'Added by the %s plugin', 'goconsent' ), $name );
				if ( current_user_can( 'activate_plugins' ) ) {
					$out['link']       = admin_url( 'plugins.php' );
					$out['link_label'] = __( 'Plugins', 'goconsent' );
				}
				break;
			case 'theme':
				/* translators: %s: theme name. */
				$out['text'] = sprintf( __( 'Added by the %s theme', 'goconsent' ), $name );
				break;
			case 'content':
				$page = ! empty( $src['post'] ) ? get_the_title( (int) $src['post'] ) : '';
				if ( '' !== $page && '' !== $detail ) {
					/* translators: 1: module name, 2: page title, 3: section name. */
					$out['text'] = sprintf( __( 'Pasted into a %1$s on “%2$s”, section “%3$s”', 'goconsent' ), $name, $page, $detail );
				} elseif ( '' !== $page ) {
					/* translators: 1: module name, 2: page title. */
					$out['text'] = sprintf( __( 'Pasted into a %1$s on “%2$s”', 'goconsent' ), $name, $page );
				} else {
					/* translators: %s: module name. */
					$out['text'] = sprintf( __( 'Pasted into a %s in the page content', 'goconsent' ), $name );
				}
				if ( ! empty( $src['post'] ) && current_user_can( 'edit_post', (int) $src['post'] ) ) {
					$out['link']       = false !== stripos( $name, 'Beaver' ) ? add_query_arg( 'fl_builder', '', get_permalink( (int) $src['post'] ) ) : (string) get_edit_post_link( (int) $src['post'], 'raw' );
					$out['link_label'] = __( 'Edit page', 'goconsent' );
				}
				break;
			case 'snippet':
				$out['text'] = 'head' === $detail
					/* translators: %s: plugin name. */
					? sprintf( __( 'Probably a header snippet in %s (no WordPress handle)', 'goconsent' ), $name )
					/* translators: %s: plugin name. */
					: sprintf( __( 'Probably a footer snippet in %s (no WordPress handle)', 'goconsent' ), $name );
				break;
			case 'handle':
				/* translators: %s: script handle. */
				$out['text']  = sprintf( __( 'Enqueued as “%s”, owner not identified', 'goconsent' ), $detail );
				$out['known'] = false;
				break;
			default:
				$out['text']  = 'head' === $detail
					? __( 'Source not identified: added to the page head without a WordPress handle (theme code or a custom snippet)', 'goconsent' )
					: __( 'Source not identified: added to the page without a WordPress handle (theme code or a custom snippet)', 'goconsent' );
				$out['known'] = false;
		}
		return $out;
	}
}