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<?php
/**
 *  This class handles all the data you can get from a Movie
 *
 *  @package TMDB-V3-PHP-API
 *  @author Alvaro Octal | <a href="https://twitter.com/Alvaro_Octal">Twitter</a>
 *  @version 0.2
 *  @date 02/04/2016
 *  @link https://github.com/Alvaroctal/TMDB-PHP-API
 *  @copyright Licensed under BSD (http://www.opensource.org/licenses/bsd-license.php)
 */
class Movie extends ApiBaseObject{

    private $_tmdb;

    //------------------------------------------------------------------------------
    // Get Variables
    //------------------------------------------------------------------------------

    /** 
     *  Get the Movie's title
     *
     *  @return string
     */
    public function getTitle() {
        return $this->_data['title'];
    }

    /** 
     *  Get the Movie's tagline
     *
     *  @return string
     */
    public function getTagline() {
        return $this->_data['tagline'];
    }

    /** 
     *  Get the Movie Directors IDs
     *
     *  @return array(int)
     */
    public function getDirectorIds() {

        $director_ids = [];

        $crew = $this->getCrew();

        /** @var Person $crew_member */
        foreach ($crew as $crew_member) {

            if ($crew_member->getJob() === Person::JOB_DIRECTOR){
                $director_ids[] = $crew_member->getID();
            }
        }
        return $director_ids;
    }

    /** 
     *  Get the Movie's trailers
     *
     *  @return array
     */
    public function getTrailers() {
        return $this->_data['trailers'];
    }

    /** 
     *  Get the Movie's trailer
     *
     *  @return string | null
     */
    public function getTrailer() {
        $trailers = $this->getTrailers();

        if (!array_key_exists('youtube', $trailers)) {
            return null;
        }

        if (count($trailers['youtube']) === 0) {
            return null;
        }

        return $trailers['youtube'][0]['source'];
    }

    /** 
     *  Get the Movie's reviews
     *
     *  @return Review[]
     */
    public function getReviews() {
        $reviews = array();

        foreach ($this->_data['review']['result'] as $data) {
            $reviews[] = new Review($data);
        }

        return $reviews;
    }

    /**
     *  Get the Movie's companies
     *
     *  @return Company[]
     */
    public function getCompanies() {
        $companies = array();
        
        foreach ($this->_data['production_companies'] as $data) {
            $companies[] = new Company($data);
        }
        
        return $companies;
    }

    //------------------------------------------------------------------------------
    // Import an API instance
    //------------------------------------------------------------------------------

    /**
     *  Set an instance of the API
     *
     *  @param TMDB $tmdb An instance of the api, necessary for the lazy load
     */
    public function setAPI($tmdb){
        $this->_tmdb = $tmdb;
    }

    //------------------------------------------------------------------------------
    // Export
    //------------------------------------------------------------------------------

    /** 
     *  Get the JSON representation of the Movie
     *
     *  @return string
     */
    public function getJSON() {
        return json_encode($this->_data, JSON_PRETTY_PRINT);
    }


    /**
     * @return string
     */
    public function getMediaType(){
        return self::MEDIA_TYPE_MOVIE;
    }
}