<?php
/**
 * Vorlagen: Kriterien-Sets je Typ, mitgeliefert und selbst gespeichert.
 *
 * @package ThreeRB
 */

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

/**
 * Vorlagen lesen, speichern, löschen. Eigene Vorlagen liegen in einer Option ohne autoload.
 */
final class ThreeRB_Templates {

	const OPTION = 'threerb_templates';
	const MAX    = 50;

	/**
	 * Haken setzen.
	 */
	public static function init() {
		add_action( 'rest_api_init', array( __CLASS__, 'routes' ) );
	}

	/**
	 * REST-Routen threerb/v1/templates.
	 */
	public static function routes() {
		$typen = array_merge( array_keys( ThreeRB_Schema::types() ), array( 'none' ) );
		register_rest_route(
			'threerb/v1',
			'/templates',
			array(
				array(
					'methods'             => 'GET',
					'callback'            => array( __CLASS__, 'rest_list' ),
					'permission_callback' => function () {
						return current_user_can( 'edit_posts' );
					},
				),
				array(
					'methods'             => 'POST',
					'callback'            => array( __CLASS__, 'rest_create' ),
					'permission_callback' => function () {
						return current_user_can( 'manage_options' );
					},
					'args'                => array(
						'name'     => array(
							'type'     => 'string',
							'required' => true,
						),
						'type'     => array(
							'type'     => 'string',
							'enum'     => $typen,
							'required' => true,
						),
						'scale'    => array(
							'type'    => 'string',
							'enum'    => array_keys( ThreeRB_Score::scales() ),
							'default' => 'p10',
						),
						'step'     => array(
							'type'    => 'number',
							'enum'    => array( 0.1, 0.5, 1 ),
							'default' => 0.1,
						),
						'criteria' => array(
							'type'     => 'array',
							'required' => true,
							'minItems' => 1,
							'maxItems' => 12,
							'items'    => array(
								'type'                 => 'object',
								'additionalProperties' => false,
								'properties'           => array(
									'label'  => array(
										'type'      => 'string',
										'maxLength' => 60,
									),
									'weight' => array(
										'type'    => 'integer',
										'minimum' => 0,
										'maximum' => 100,
									),
								),
							),
						),
					),
				),
			)
		);
		register_rest_route(
			'threerb/v1',
			'/templates/(?P<key>[a-z0-9_-]{1,40})',
			array(
				'methods'             => 'DELETE',
				'callback'            => array( __CLASS__, 'rest_delete' ),
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
			)
		);
	}

	/**
	 * REST: alle Vorlagen.
	 *
	 * @return WP_REST_Response
	 */
	public static function rest_list() {
		return rest_ensure_response( array_values( self::all() ) );
	}

	/**
	 * REST: eigene Vorlage anlegen.
	 *
	 * @param WP_REST_Request $request Anfrage.
	 * @return WP_REST_Response|WP_Error
	 */
	public static function rest_create( $request ) {
		$vorlage = self::save(
			array(
				'name'     => $request['name'],
				'type'     => $request['type'],
				'scale'    => $request['scale'],
				'step'     => $request['step'],
				'criteria' => $request['criteria'],
			)
		);
		if ( is_wp_error( $vorlage ) ) {
			return $vorlage;
		}
		$antwort = rest_ensure_response( $vorlage );
		$antwort->set_status( 201 );
		return $antwort;
	}

	/**
	 * REST: eigene Vorlage löschen.
	 *
	 * @param WP_REST_Request $request Anfrage.
	 * @return WP_REST_Response|WP_Error
	 */
	public static function rest_delete( $request ) {
		$eigene = self::own();
		$key    = (string) $request['key'];
		if ( ! isset( $eigene[ $key ] ) ) {
			return new WP_Error( 'threerb_template_missing', __( 'This template does not exist or cannot be deleted.', '3task-review-box' ), array( 'status' => 404 ) );
		}
		unset( $eigene[ $key ] );
		update_option( self::OPTION, $eigene, false );
		return rest_ensure_response( array( 'deleted' => $key ) );
	}

	/**
	 * Mitgelieferte und eigene Vorlagen.
	 *
	 * @return array<string, array>
	 */
	public static function all() {
		$alle = array();
		foreach ( self::builtin() as $key => $v ) {
			$alle[ $key ] = self::form( $key, $v, true );
		}
		foreach ( self::own() as $key => $v ) {
			$alle[ $key ] = self::form( $key, $v, false );
		}
		return $alle;
	}

	/**
	 * Eigene Vorlagen, geprüft gelesen.
	 *
	 * @return array<string, array>
	 */
	public static function own() {
		$roh = get_option( self::OPTION, array() );
		$out = array();
		if ( ! is_array( $roh ) ) {
			return $out;
		}
		foreach ( $roh as $key => $v ) {
			if ( is_string( $key ) && preg_match( '/^own[a-z0-9]{10}$/', $key ) && is_array( $v ) ) {
				$sauber = self::clean( $v );
				if ( ! is_wp_error( $sauber ) ) {
					$out[ $key ] = $sauber;
				}
			}
		}
		return $out;
	}

	/**
	 * Eigene Vorlage speichern.
	 *
	 * @param array $roh Eingabe.
	 * @return array|WP_Error Gespeicherte Vorlage.
	 */
	public static function save( array $roh ) {
		$eigene = self::own();
		if ( count( $eigene ) >= self::MAX ) {
			return new WP_Error( 'threerb_template_limit', __( 'You can keep up to 50 own templates. Delete one first.', '3task-review-box' ), array( 'status' => 400 ) );
		}
		$sauber = self::clean( $roh );
		if ( is_wp_error( $sauber ) ) {
			return $sauber;
		}
		do {
			$key = 'own' . strtolower( wp_generate_password( 10, false, false ) );
		} while ( isset( $eigene[ $key ] ) );
		$eigene[ $key ] = $sauber;
		update_option( self::OPTION, $eigene, false );
		return self::form( $key, $sauber, false );
	}

	/**
	 * Prüft eine Vorlage: Name 1 bis 60 Zeichen, Typ aus der Liste, 1 bis 12 Kriterien, Gewichte 0 bis 100.
	 *
	 * @param array $roh Eingabe.
	 * @return array|WP_Error
	 */
	public static function clean( array $roh ) {
		$fehler = new WP_Error( 'threerb_template_invalid', __( 'The template is not valid: name 1 to 60 characters, 1 to 12 criteria with weights from 0 to 100.', '3task-review-box' ), array( 'status' => 400 ) );
		$name   = isset( $roh['name'] ) && is_string( $roh['name'] ) ? trim( sanitize_text_field( $roh['name'] ) ) : '';
		$typ    = isset( $roh['type'] ) && is_string( $roh['type'] ) ? $roh['type'] : '';
		$scale  = isset( $roh['scale'] ) && null !== ThreeRB_Score::max( $roh['scale'] ) ? $roh['scale'] : 'p10';
		$step   = isset( $roh['step'] ) && is_numeric( $roh['step'] ) ? (float) $roh['step'] : 0.1;
		if ( '' === $name || mb_strlen( $name ) > 60 || ( 'none' !== $typ && ! array_key_exists( $typ, ThreeRB_Schema::types() ) ) ) {
			return $fehler;
		}
		if ( ! in_array( $step, ThreeRB_Score::scales()[ $scale ]['steps'], true ) ) {
			$step = ThreeRB_Score::scales()[ $scale ]['steps'][0];
		}
		$kriterien = array();
		foreach ( isset( $roh['criteria'] ) && is_array( $roh['criteria'] ) ? $roh['criteria'] : array() as $k ) {
			$label   = is_array( $k ) && isset( $k['label'] ) && is_string( $k['label'] ) ? trim( sanitize_text_field( $k['label'] ) ) : '';
			$gewicht = is_array( $k ) && isset( $k['weight'] ) && is_numeric( $k['weight'] ) ? (float) $k['weight'] : -1;
			if ( '' === $label || mb_strlen( $label ) > 60 || $gewicht < 0 || $gewicht > 100 || floor( $gewicht ) !== $gewicht ) {
				return $fehler;
			}
			$kriterien[] = array(
				'label'  => $label,
				'weight' => (int) $gewicht,
			);
		}
		if ( count( $kriterien ) < 1 || count( $kriterien ) > 12 ) {
			return $fehler;
		}
		return array(
			'name'     => $name,
			'type'     => $typ,
			'scale'    => $scale,
			'step'     => $step,
			'criteria' => $kriterien,
		);
	}

	/**
	 * Mitgelieferte Vorlagen je Typ (Gewichte ergeben 100).
	 *
	 * @return array<string, array>
	 */
	public static function builtin() {
		$k = function ( array $paare ) {
			$out = array();
			foreach ( $paare as $paar ) {
				$out[] = array(
					'label'  => $paar[0],
					'weight' => $paar[1],
				);
			}
			return $out;
		};
		return array(
			'product'  => array(
				'name'     => __( 'Product', '3task-review-box' ),
				'type'     => 'product',
				'scale'    => 'p10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Performance', '3task-review-box' ), 30 ),
						array( __( 'Build quality', '3task-review-box' ), 25 ),
						array( __( 'Handling', '3task-review-box' ), 25 ),
						array( __( 'Value for money', '3task-review-box' ), 20 ),
					)
				),
			),
			'movie'    => array(
				'name'     => __( 'Movie', '3task-review-box' ),
				'type'     => 'movie',
				'scale'    => 's10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Story', '3task-review-box' ), 30 ),
						array( __( 'Acting', '3task-review-box' ), 25 ),
						array( __( 'Visuals', '3task-review-box' ), 25 ),
						array( __( 'Sound and music', '3task-review-box' ), 20 ),
					)
				),
			),
			'series'   => array(
				'name'     => __( 'TV series', '3task-review-box' ),
				'type'     => 'series',
				'scale'    => 's10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Story', '3task-review-box' ), 30 ),
						array( __( 'Characters', '3task-review-box' ), 30 ),
						array( __( 'Pacing', '3task-review-box' ), 20 ),
						array( __( 'Production', '3task-review-box' ), 20 ),
					)
				),
			),
			'game'     => array(
				'name'     => __( 'Video game', '3task-review-box' ),
				'type'     => 'game',
				'scale'    => 'p10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Gameplay', '3task-review-box' ), 35 ),
						array( __( 'Graphics', '3task-review-box' ), 20 ),
						array( __( 'Sound', '3task-review-box' ), 15 ),
						array( __( 'Story', '3task-review-box' ), 15 ),
						array( __( 'Value for money', '3task-review-box' ), 15 ),
					)
				),
			),
			'software' => array(
				'name'     => __( 'Software or app', '3task-review-box' ),
				'type'     => 'software',
				'scale'    => 'p10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Ease of use', '3task-review-box' ), 30 ),
						array( __( 'Features', '3task-review-box' ), 25 ),
						array( __( 'Speed', '3task-review-box' ), 20 ),
						array( __( 'Privacy', '3task-review-box' ), 15 ),
						array( __( 'Value for money', '3task-review-box' ), 10 ),
					)
				),
			),
			'book'     => array(
				'name'     => __( 'Book', '3task-review-box' ),
				'type'     => 'book',
				'scale'    => 's5',
				'step'     => 0.5,
				'criteria' => $k(
					array(
						array( __( 'Content', '3task-review-box' ), 35 ),
						array( __( 'Writing style', '3task-review-box' ), 30 ),
						array( __( 'Structure', '3task-review-box' ), 20 ),
						array( __( 'Value for money', '3task-review-box' ), 15 ),
					)
				),
			),
			'recipe'   => array(
				'name'     => __( 'Recipe', '3task-review-box' ),
				'type'     => 'recipe',
				'scale'    => 's5',
				'step'     => 0.5,
				'criteria' => $k(
					array(
						array( __( 'Taste', '3task-review-box' ), 40 ),
						array( __( 'Effort', '3task-review-box' ), 20 ),
						array( __( 'Ingredients', '3task-review-box' ), 20 ),
						array( __( 'Reliability', '3task-review-box' ), 20 ),
					)
				),
			),
			'course'   => array(
				'name'     => __( 'Course', '3task-review-box' ),
				'type'     => 'course',
				'scale'    => 'p10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Content', '3task-review-box' ), 35 ),
						array( __( 'Teaching', '3task-review-box' ), 30 ),
						array( __( 'Materials', '3task-review-box' ), 15 ),
						array( __( 'Value for money', '3task-review-box' ), 20 ),
					)
				),
			),
			'event'    => array(
				'name'     => __( 'Event', '3task-review-box' ),
				'type'     => 'event',
				'scale'    => 'p10',
				'step'     => 0.1,
				'criteria' => $k(
					array(
						array( __( 'Programme', '3task-review-box' ), 35 ),
						array( __( 'Organisation', '3task-review-box' ), 25 ),
						array( __( 'Venue', '3task-review-box' ), 20 ),
						array( __( 'Value for money', '3task-review-box' ), 20 ),
					)
				),
			),
			'music'    => array(
				'name'     => __( 'Music', '3task-review-box' ),
				'type'     => 'music',
				'scale'    => 's5',
				'step'     => 0.5,
				'criteria' => $k(
					array(
						array( __( 'Songwriting', '3task-review-box' ), 35 ),
						array( __( 'Performance', '3task-review-box' ), 25 ),
						array( __( 'Production', '3task-review-box' ), 25 ),
						array( __( 'Lyrics', '3task-review-box' ), 15 ),
					)
				),
			),
			'local'    => array(
				'name'     => __( 'Local business (not your own)', '3task-review-box' ),
				'type'     => 'local',
				'scale'    => 's5',
				'step'     => 0.5,
				'criteria' => $k(
					array(
						array( __( 'Service', '3task-review-box' ), 30 ),
						array( __( 'Quality', '3task-review-box' ), 30 ),
						array( __( 'Atmosphere', '3task-review-box' ), 20 ),
						array( __( 'Value for money', '3task-review-box' ), 20 ),
					)
				),
			),
		);
	}

	/**
	 * Ausgabeform einer Vorlage.
	 *
	 * @param string $key     Schlüssel.
	 * @param array  $v       Vorlage.
	 * @param bool   $builtin Mitgeliefert.
	 * @return array
	 */
	private static function form( $key, array $v, $builtin ) {
		return array(
			'key'      => $key,
			'name'     => $v['name'],
			'type'     => $v['type'],
			'scale'    => $v['scale'],
			'step'     => (float) $v['step'],
			'criteria' => $v['criteria'],
			'builtin'  => (bool) $builtin,
		);
	}
}