<?PHP
/**
 * Represents a higher level category of event types.
 *
 * @author Joshua Ramon Enslin <joshua@museum-digital.de>
 */
declare(strict_types = 1);

/**
 * Represents a higher level category of event types.
 */
enum MDEventCategory implements JsonSerializable {

    case production;
    case post_production;
    case pre_production;
    case no_production;

    /**
     * Returns an MDEventCategory based on a given event type.
     *
     * @param integer $event_type Event type.
     *
     * @return MDEventCategory
     */
    public static function fromEventType(int $event_type):MDEventCategory {

        if (in_array($event_type, MDEventsSet::EVENTS_PRODUCTION, true)) {
            return self::production;
        }
        if (in_array($event_type, MDEventsSet::EVENTS_POST_PRODUCTION, true)) {
            return self::post_production;
        }
        if (in_array($event_type, MDEventsSet::EVENTS_PRE_PRODUCTION, true)) {
            return self::pre_production;
        }
        if (in_array($event_type, MDEventsSet::EVENTS_NO_PRODUCTION, true)) {
            return self::no_production;
        }
        if ($event_type === 5 || $event_type === 36) { // Was depicted (actor + place)
            return self::no_production;
        }
        throw new Exception("Uncategorized event type: " . $event_type);

    }

    /**
     * Lists all available names.
     *
     * @return array<string>
     */
    public static function caseNames():array {

        $output = [];

        $cases = self::cases();
        foreach ($cases as $case) {
            $output[] = $case->name;
        }

        return $output;

    }

    /**
     * Provides the option to serialize as a string during json_encode().
     *
     * @return string
     */
    public function jsonSerialize():string {

        return $this->name;

    }
}