<?php

class Cornerstone_Header {

  protected $id = null;
  protected $title;
  protected $content = array();
  protected $new;
  protected $dirty;
  protected $modified;

  public function __construct( $post ) {

    if ( is_array( $post ) ) {
      if ( isset( $post['id'] ) ) {
        $post = $post['id'];
      } else {
        $this->create_new( $post );
      }
    } else {

      if ( is_a( $post, 'Cornerstone_Template' ) ) {

        $meta = $post->get_meta();

        $this->create_new( array(
          'title'   => $post->get_title(),
          'regions' => isset( $meta['regions'] ) ? $meta['regions'] : array(),
          'settings' => isset( $meta['settings'] ) ? $meta['settings'] : array()
        ) );

      } else {
        $this->load_from_post( $post );
      }

    }

  }

  protected function create_new( $data ) {

    $this->set_title( isset( $data['title'] ) ? $data['title'] : false );
    // TODO: Populate from incoming data.

    $this->set_content( array(
      'regions' => isset( $data['regions'] ) ? $data['regions'] : array(),
      'settings' => isset( $data['settings'] ) ? $data['settings'] : array()
    ) );

  }

  protected function load_from_post( $post ) {

    if ( is_int( $post ) ) {
      $post = get_post( $post );
    }

    if ( ! is_a( $post, 'WP_POST' ) ) {
      throw new Exception( 'Unable to load header from post.' );
    }

    if ( 'cs_header' !== $post->post_type ) {
      throw new Exception( 'Attempted to load header from incorrect post_type.' );
    }

    $this->id = $post->ID;
    $this->set_title( $post->post_title ? $post->post_title : '' );
    $content = apply_filters('cs_header_load_content', $post->post_content );
    $this->set_content( cs_maybe_json_decode( $content ) );

  }

  protected function set_content( $content ) {

    $content = wp_parse_args( is_array( $content ) ? $content : array(), array(
      'regions' => array(),
      'settings' => array(),
    ) );

    $this->set_regions( $content['regions'] );
    $this->set_settings( $content['settings'] );

  }

  public function save() {

    if ( ! CS()->component('App_Permissions')->user_can('headers') ) {
      throw new Exception( 'Unauthorized' );
    }

    // Expand Template
    $settings = $this->get_settings();

    if ( isset( $settings['_template'] ) && $settings['_template'] ) {
      $template = new Cornerstone_Template( $settings['_template'] );
      $meta = $template->get_meta();
      $this->set_regions( isset( $meta['regions'] ) ? $meta['regions'] : array() );
      $this->set_settings( isset( $meta['settings'] ) ? $meta['settings'] : array() );
    }

    $args = array(
      'post_title'   => $this->get_title(),
      'post_type'    => 'cs_header',
      'post_status'  => 'tco-data',
      'post_content' => apply_filters('cs_header_update_content', wp_slash( cs_json_encode( array(
        'regions' => $this->get_regions(),
        'settings' => $this->get_settings()
      ) ) ) )
    );

    if ( is_int( $this->id ) ) {
      $args['ID'] = $this->id;
    }

    do_action( 'cs_before_save_json_content' );
    $id = wp_insert_post( $args );
    do_action( 'cs_after_save_json_content' );

    if ( 0 === $id || is_wp_error( $id ) ) {
      throw new Exception( "Unable to update header: $id" );
    }

    $this->load_from_post( (int) $id );

    return $this->serialize();

  }

  public function get_id() {
    return $this->id;
  }

  public function get_title() {
    return $this->title;
  }

  public function get_regions() {
    if ( ! isset( $this->content['regions'] ) ) {
      $this->content['regions'] = array();
    }
    return $this->content['regions'];
  }

  public function get_settings() {
    if ( ! isset( $this->content['settings'] ) ) {
      $this->content['settings'] = array();
    }
    return $this->content['settings'];
  }

  public function serialize() {
    return array(
      'id' => $this->id,
      'title' => $this->get_title(),
      'regions'  => $this->get_regions(),
      'settings' => $this->get_settings()
    );
  }

  public function set_title( $title ) {
    return $this->title = sanitize_text_field( $title, sprintf( csi18n('common.untitled-entity'), csi18n('common.headers.entity') ) );
  }

  public function set_settings( $settings ) {
    $this->content['settings'] = $settings;
  }

  public function set_regions( $regions ) {
    $this->content['regions'] = $regions;
  }

  public function delete() {

    if ( ! CS()->component('App_Permissions')->user_can('headers.delete') ) {
      throw new Exception( 'Unauthorized' );
    }

    do_action('cornerstone_delete_header', $this->id );

    return wp_delete_post( $this->id, true );

  }
}
