<?php
if ( ! defined( 'ABSPATH' ) ) {
  exit;
}

/**
 * Settings option key.
 */
function abdielmskef_settings_key(): string {
  return 'abdielmskef_settings';
}

function abdielmskef_get_settings(): array {
  $defaults = [
    'default_new_pages_kit' => 0,
  ];
  $opt      = get_option( abdielmskef_settings_key(), [] );
  if ( ! is_array( $opt ) ) {
    $opt = [];
  }
  return array_merge( $defaults, $opt );
}

function abdielmskef_update_settings( array $new ): void {
  $cur = abdielmskef_get_settings();
  update_option( abdielmskef_settings_key(), array_merge( $cur, $new ), false );
}

/**
 * Elementor kit query helpers.
 */
function abdielmskef_query_kits(): array {
  $args = [
    'post_type'      => 'elementor_library',
    'posts_per_page' => 200,
    'post_status'    => [ 'publish', 'draft', 'private' ],
    'meta_query'     => [
      [
        'key'   => '_elementor_template_type',
        'value' => 'kit',
      ],
    ],
    'orderby'        => 'title',
    'order'          => 'ASC',
    'fields'         => 'ids',
  ];
  
  // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- Essential to find Elementor Kits
  $q = new WP_Query( $args );
  return $q->posts ?: [];
}

function abdielmskef_is_kit( int $post_id ): bool {
  return ( get_post_type( $post_id ) === 'elementor_library' ) && ( get_post_meta( $post_id, '_elementor_template_type', true ) === 'kit' );
}

function abdielmskef_get_active_kit_id(): int {
  return (int) get_option( 'elementor_active_kit', 0 );
}

function abdielmskef_set_active_kit_id( int $kit_id ): bool {
  if ( $kit_id && ! abdielmskef_is_kit( $kit_id ) ) {
    return false;
  }
  update_option( 'elementor_active_kit', $kit_id, false );
  return true;
}

/**
 * JSON export/import (simple, no remote).
 */
function abdielmskef_export_kit_payload( int $kit_id ): array {
  $post = get_post( $kit_id );
  if ( ! $post ) {
    return [];
  }
  $meta_keys = [
    '_elementor_data',
    '_elementor_page_settings',
    '_elementor_edit_mode',
    '_elementor_template_type',
    '_elementor_version',
    '_elementor_css',
  ];
  $meta      = [];
  foreach ( $meta_keys as $k ) {
    $meta[ $k ] = get_post_meta( $kit_id, $k, true );
  }
  return [
    'format'      => 'mskfe-kit-v1',
    'exported_at' => gmdate( 'c' ),
    'title'       => $post->post_title,
    'status'      => $post->post_status,
    'meta'        => $meta,
  ];
}

function abdielmskef_import_kit_payload( array $payload ): int {
  if ( ! isset( $payload['format'] ) || $payload['format'] !== 'mskfe-kit-v1' ) {
    return 0;
  }
  $title   = sanitize_text_field( $payload['title'] ?? 'Imported Kit' );
  $status  = in_array( $payload['status'] ?? 'publish', [ 'publish', 'draft', 'private' ], true ) ? $payload['status'] : 'publish';
  $new_id  = wp_insert_post( [
    'post_type'   => 'elementor_library',
    'post_title'  => $title,
    'post_status' => $status,
  ], true );
  if ( is_wp_error( $new_id ) ) {
    return 0;
  }

  // Ensure template type is kit
  update_post_meta( $new_id, '_elementor_template_type', 'kit' );

  $meta = $payload['meta'] ?? [];
  if ( is_array( $meta ) ) {
    foreach ( $meta as $k => $v ) {
      if ( $k === '_elementor_template_type' ) {
        continue;
      }
      update_post_meta( $new_id, $k, $v );
    }
  }
  return (int) $new_id;
}

/**
 * Clone kit.
 */
function abdielmskef_clone_kit( int $kit_id ): int {
  $post = get_post( $kit_id );
  if ( ! $post ) {
    return 0;
  }
  $new_id = wp_insert_post( [
    'post_type'   => 'elementor_library',
    'post_title'  => $post->post_title . ' (Clone)',
    'post_status' => $post->post_status,
  ], true );
  if ( is_wp_error( $new_id ) ) {
    return 0;
  }

  $all_meta = get_post_meta( $kit_id );
  foreach ( $all_meta as $key => $values ) {
    if ( $key === '_edit_lock' || $key === '_edit_last' ) {
      continue;
    }
    if ( ! is_array( $values ) ) {
      continue;
    }
    update_post_meta( $new_id, $key, maybe_unserialize( $values[0] ) );
  }
  update_post_meta( $new_id, '_elementor_template_type', 'kit' );
  return (int) $new_id;
}

/**
 * Normalize kit colors.
 */
function abdielmskef_normalize_kit_colors( int $kit_id ): bool {
  if ( ! abdielmskef_is_kit( $kit_id ) ) {
    return false;
  }

  $settings = get_post_meta( $kit_id, '_elementor_page_settings', true );
  if ( ! is_array( $settings ) ) {
    $settings = [];
  }

  $sys = $settings['system_colors'] ?? [];
  if ( ! is_array( $sys ) ) {
    $sys = [];
  }

  $existing_ids = [];
  foreach ( $sys as $item ) {
    if ( is_array( $item ) && isset( $item['_id'] ) ) {
      $existing_ids[ (string) $item['_id'] ] = true;
    }
  }

  $to_add = [
    [ '_id' => 'ksa_dark', 'title' => 'Dark', 'color' => '#141414' ],
    [ '_id' => 'ksa_light', 'title' => 'Light', 'color' => '#f4f4f4' ],
    [ '_id' => 'ksa_text_dark', 'title' => 'Text Dark', 'color' => '#0f172a' ],
    [ '_id' => 'ksa_text_light', 'title' => 'Text Light', 'color' => '#f8fafc' ],
    [ '_id' => 'ksa_accent_1', 'title' => 'Accent 1', 'color' => '#2563eb' ],
    [ '_id' => 'ksa_accent_2', 'title' => 'Accent 2', 'color' => '#ff3bd4' ],
    [ '_id' => 'ksa_accent_3', 'title' => 'Accent 3', 'color' => '#7c3aed' ],
  ];

  $changed = false;
  foreach ( $to_add as $item ) {
    if ( ! isset( $existing_ids[ $item['_id'] ] ) ) {
      $sys[]   = $item;
      $changed = true;
    }
  }

  if ( $changed ) {
    $settings['system_colors'] = $sys;
    update_post_meta( $kit_id, '_elementor_page_settings', $settings );
  }
  return true;
}


// AJAX: search pages/posts by title
add_action( 'wp_ajax_abdielmskef_search_posts', function () {
  if ( ! current_user_can( 'manage_options' ) ) {
    wp_send_json_error( [ 'message' => 'forbidden' ], 403 );
  }
  // SECURITY FIX: Remove third param 'false' to enforce strict check
  if ( ! check_ajax_referer( 'abdielmskef_admin', 'nonce', false ) ) {
    wp_send_json_error( [ 'message' => 'bad_nonce' ], 403 );
  }

  $term       = isset( $_GET['term'] ) ? sanitize_text_field( wp_unslash( $_GET['term'] ) ) : '';
  $scope      = isset( $_GET['scope'] ) ? sanitize_key( $_GET['scope'] ) : 'pages';
  $post_types = ( $scope === 'pages_posts' ) ? [ 'page', 'post' ] : [ 'page' ];

  $args = [
    'post_type'      => $post_types,
    'post_status'    => [ 'publish', 'draft', 'private' ],
    'posts_per_page' => 20,
    's'              => $term,
    'fields'         => 'ids',
  ];
  // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_s
  $q = new WP_Query( $args );

  $items = [];
  foreach ( $q->posts as $id ) {
    $items[] = [
      'id'     => (int) $id,
      'title'  => get_the_title( $id ),
      'type'   => get_post_type( $id ),
      'status' => get_post_status( $id ),
    ];
  }
  wp_send_json_success( [ 'items' => $items ] );
} );


// Flash messages
function abdielmskef_set_flash( string $type, string $message ): void {
  set_transient( 'abdielmskef_flash_' . get_current_user_id(), [
    'type'    => $type,
    'message' => $message,
  ], 60 );
}
function abdielmskef_get_flash(): array {
  $key  = 'abdielmskef_flash_' . get_current_user_id();
  $data = get_transient( $key );
  if ( $data ) {
    delete_transient( $key );
  }
  return is_array( $data ) ? $data : [];
}


/**
 * Build tracked external URLs.
 */
function abdielmskef_tracked_url( string $url, string $placement = 'unknown', string $context = 'admin' ): string {
  $site   = wp_parse_url( home_url(), PHP_URL_HOST );
  $params = [
    'utm_source'   => 'wp_plugin',
    'utm_medium'   => 'plugin',
    'utm_campaign' => 'multi-style-kits-for-elementor',
    'utm_content'  => $placement,
    'site'         => $site ?: '',
    'plugin'       => ABDIELMSKEF_SLUG,
    'version'      => ABDIELMSKEF_VERSION,
    'context'      => $context,
  ];
  return add_query_arg( array_filter( $params, function( $v ) {
    return $v !== ''; } ), $url );
}

/**
 * Common admin footer.
 */
function abdielmskef_admin_footer(): void {
  $support_url   = abdielmskef_tracked_url( 'https://joseabdiel.com/', 'footer_support', 'admin' );
  $resources_url = abdielmskef_tracked_url( 'https://joseabdiel.com/', 'footer_resources', 'admin' );

  echo '<div class="abdielmskef-footer">';
  echo '<div class="abdielmskef-footer-inner">';
  echo '<div class="abdielmskef-footer-copy">';
  echo '<p><strong>' . esc_html__( 'Why does this plugin exist?', 'abdiel-multi-style-kits-for-elementor' ) . '</strong></p>';
  echo '<p class="abdielmskef-muted">' . esc_html__( 'Lo creé para gestionar múltiples Kits de Estilo (Elementor) dentro de un mismo proyecto, cambiar la apariencia del sitio en segundos y poder trabajar con varias identidades de marca sin complicaciones.', 'abdiel-multi-style-kits-for-elementor' ) . '</p>';
  echo '</div>';
  echo '<div class="abdielmskef-footer-actions">';
  echo '<a class="button button-primary" target="_blank" rel="noopener noreferrer" href="' . esc_url( $support_url ) . '">' . esc_html__( 'Support el proyecto', 'abdiel-multi-style-kits-for-elementor' ) . '</a> ';
  echo '<a class="button button-secondary abdielmskef-btn" target="_blank" rel="noopener noreferrer" href="' . esc_url( $resources_url ) . '">' . esc_html__( 'See more resources', 'abdiel-multi-style-kits-for-elementor' ) . '</a>';
  echo '</div>';
  echo '</div>';
  echo '</div>';
}


// AJAX: set kit as global
add_action( 'wp_ajax_abdielmskef_set_global_kit', function () {
  try {
    if ( ! current_user_can( 'manage_options' ) ) {
      wp_send_json_error( [ 'message' => 'forbidden' ], 403 );
    }
    // SECURITY FIX: Strict check
    if ( ! check_ajax_referer( 'abdielmskef_admin', 'nonce', false ) ) {
      wp_send_json_error( [ 'message' => 'bad_nonce' ], 403 );
    }

    $kit_id = isset( $_POST['kit_id'] ) ? (int) $_POST['kit_id'] : 0;
    if ( ! $kit_id || ! function_exists( 'abdielmskef_is_kit' ) || ! abdielmskef_is_kit( $kit_id ) ) {
      wp_send_json_error( [ 'message' => 'invalid_kit' ], 400 );
    }

    if ( function_exists( 'abdielmskef_set_active_kit_id' ) ) {
      abdielmskef_set_active_kit_id( $kit_id );
    } else {
      update_option( 'elementor_active_kit', $kit_id, false );
    }

    update_option( 'abdielmskef_base_kit_id', $kit_id, false );

    if ( class_exists( 'Elementor\\Plugin' ) ) {
      try {
        $plugin = \Elementor\Plugin::instance();
        if ( isset( $plugin->files_manager ) && method_exists( $plugin->files_manager, 'clear_cache' ) ) {
          $plugin->files_manager->clear_cache();
        }
      } catch ( \Throwable $e ) {}
    }

    wp_send_json_success( [
      'kit_id' => $kit_id,
      'title'  => get_the_title( $kit_id ),
    ] );
  } catch ( \Throwable $e ) {
    wp_send_json_error( [ 'message' => $e->getMessage() ], 500 );
  }
} );


/**
 * Delete a kit safely.
 */
function abdielmskef_delete_kit_safely( int $kit_id, array &$out, string &$err ): bool {
  $out = [];
  $err = '';

  if ( ! $kit_id || ! function_exists( 'abdielmskef_is_kit' ) || ! abdielmskef_is_kit( $kit_id ) ) {
    $err = 'invalid_kit';
    return false;
  }

  $kits      = function_exists( 'abdielmskef_query_kits' ) ? abdielmskef_query_kits() : [];
  $kits      = is_array( $kits ) ? $kits : [];
  $remaining = array_values( array_filter( $kits, function ( $id ) use ( $kit_id ) {
    return (int) $id !== (int) $kit_id;
  } ) );

  if ( count( $remaining ) < 1 ) {
    $err = __( 'Cannot delete because it is the only kit in the library.', 'abdiel-multi-style-kits-for-elementor' );
    return false;
  }

  $current_global = (int) get_option( 'elementor_active_kit', 0 );
  $current_base = (int) get_option( ABDIELMSKEF_OPT_BASE_KIT_ID, 0 );

  $replacement = (int) ( $remaining[0] ?? 0 );
  $reassigned  = 0;

  if ( $kit_id === $current_global && $replacement ) {
    update_option( 'elementor_active_kit', $replacement, false );
    $reassigned = 1;
  }
  if ( $kit_id === $current_base && $replacement ) {
    update_option( ABDIELMSKEF_OPT_BASE_KIT_ID, $replacement, false );
  }

  $deleted = wp_delete_post( $kit_id, true );
  if ( is_wp_error( $deleted ) ) {
    $err = $deleted->get_error_message();
    return false;
  }
  if ( ! $deleted ) {
    $err = __( 'Could not delete the kit.', 'abdiel-multi-style-kits-for-elementor' );
    return false;
  }

  $reassigned_posts = 0;
  
  // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
  $q = new WP_Query( [
    'post_type'      => 'any',
    'posts_per_page' => 500,
    'post_status'    => [ 'publish', 'draft', 'private' ],
    'meta_query'     => [
      [
        'key'     => ABDIELMSKEF_META_LOCAL_KIT_ID,
        'value'   => (string) $kit_id,
        'compare' => '=',
      ],
    ],
    'fields'         => 'ids',
  ] );

  if ( $q->have_posts() ) {
    foreach ( $q->posts as $pid ) {
      delete_post_meta( $pid, ABDIELMSKEF_META_LOCAL_KIT_ID );
      $reassigned_posts++;

      $settings = get_post_meta( $pid, '_elementor_page_settings', true );

      if ( is_array( $settings ) ) {
        $new_key = ABDIELMSKEF_META_LOCAL_KIT_ID;
        if ( isset( $settings[ $new_key ] ) && (int) $settings[ $new_key ] === (int) $kit_id ) {
          unset( $settings[ $new_key ] );
          update_post_meta( $pid, '_elementor_page_settings', $settings );
          $reassigned_posts++;
        }
      } elseif ( is_string( $settings ) && strpos( $settings, ABDIELMSKEF_META_LOCAL_KIT_ID ) !== false ) {
        $maybe = @unserialize( $settings );
        if ( is_array( $maybe ) ) {
          if ( isset( $maybe[ ABDIELMSKEF_META_LOCAL_KIT_ID ] ) && (int) $maybe[ ABDIELMSKEF_META_LOCAL_KIT_ID ] === (int) $kit_id ) {
            unset( $maybe[ ABDIELMSKEF_META_LOCAL_KIT_ID ] );
            update_post_meta( $pid, '_elementor_page_settings', $maybe );
            $reassigned_posts++;
          }
        }
      }
    }
  }
  wp_reset_postdata();

  if ( class_exists( '\Elementor\Plugin' ) ) {
    try {
      $plugin = \Elementor\Plugin::instance();
      if ( $plugin && isset( $plugin->files_manager ) && method_exists( $plugin->files_manager, 'clear_cache' ) ) {
        $plugin->files_manager->clear_cache();
      }
    } catch ( \Throwable $e ) {}
  }

  $out['replacement']      = $replacement;
  $out['reassigned']       = $reassigned;
  $out['reassigned_posts'] = $reassigned_posts;
  $out['deleted']          = 1;
  return true;
}

// AJAX: delete kit
add_action( 'wp_ajax_abdielmskef_delete_kit', function () {
  try {
    if ( ! current_user_can( 'manage_options' ) ) {
      wp_send_json_error( [ 'message' => 'forbidden' ], 403 );
    }
    // SECURITY FIX: Strict check
    if ( ! check_ajax_referer( 'abdielmskef_admin', 'nonce', false ) ) {
      wp_send_json_error( [ 'message' => 'bad_nonce' ], 403 );
    }

    $kit_id = isset( $_POST['kit_id'] ) ? (int) $_POST['kit_id'] : 0;
    if ( ! $kit_id ) {
      wp_send_json_error( [ 'message' => 'invalid_kit' ], 400 );
    }

    $out = [];
    $err = '';
    if ( ! abdielmskef_delete_kit_safely( (int) $kit_id, $out, $err ) ) {
      $msg = $err ? $err : 'error';
      wp_send_json_error( [ 'message' => $msg ], 400 );
    }

    wp_send_json_success( [
      'deleted_id'  => (int) $kit_id,
      'replacement' => isset( $out['replacement'] ) ? (int) $out['replacement'] : 0,
      'reassigned'  => isset( $out['reassigned'] ) ? (int) $out['reassigned'] : 0,
    ] );
  } catch ( \Throwable $e ) {
    wp_send_json_error( [ 'message' => $e->getMessage() ], 500 );
  }
} );