<?php
/**
 * The admin page for the snippet generator.
 *
 * @package WPCode
 */

/**
 * Class WPCode_Admin_Page_Generator.
 */
class WPCode_Admin_Page_Generator extends WPCode_Admin_Page {

	/**
	 * The page slug.
	 *
	 * @var string
	 */
	public $page_slug = 'wpcode-generator';

	/**
	 * Generator to show, if any.
	 *
	 * @var bool|string
	 */
	public $generator = false;

	/**
	 * Available generators.
	 *
	 * @var WPCode_Generator_Type[]
	 */
	public $generators;

	/**
	 * Set the code type for the editor on this page.
	 *
	 * @var string
	 */
	public $code_type = 'php';

	/**
	 * Set the header title based on what is displayed.
	 *
	 * @var string
	 */
	public $header_title;

	/**
	 * Snippet if editing an existing, generated snippet.
	 *
	 * @var WPCode_Snippet
	 */
	public $snippet;

	/**
	 * The capability required to view this page.
	 *
	 * @var string
	 */
	protected $capability = 'wpcode_edit_php_snippets';

	/**
	 * Call this just to set the page title translatable.
	 */
	public function __construct() {
		$this->page_title   = __( 'Generator', 'insert-headers-and-footers' );
		$this->header_title = $this->page_title;
		parent::__construct();
	}

	/**
	 * Page-specific hooks & logic.
	 *
	 * @return void
	 */
	public function page_hooks() {
		$this->generators = wpcode()->generator()->get_all_generators();
		// phpcs:disable WordPress.Security.NonceVerification.Recommended
		// Let's see if we should display a generator.
		if ( isset( $_GET['generator'] ) ) {
			$generator = sanitize_text_field( wp_unslash( $_GET['generator'] ) );
			if ( array_key_exists( $generator, $this->generators ) ) {
				$this->generator = $generator;
			}
		}

		$snippet_id = isset( $_GET['snippet'] ) ? absint( $_GET['snippet'] ) : false;
		if ( $snippet_id ) {
			$this->snippet = new WPCode_Snippet( $snippet_id );
			if ( $this->snippet->get_post_data() ) {
				WPCode_Notice::add(
					sprintf(
							// Translators: gets replaced with the snippet title.
						__( 'You are now editing the generated snippet: "%s". Updating the snippet will override any edits you made to the code.', 'insert-headers-and-footers' ),
						$this->snippet->get_title()
					),
					'warning'
				);
			} else {
				unset( $this->snippet );
			}
		}

		// phpcs:enable WordPress.Security.NonceVerification.Recommended
		if ( $this->generator ) {
			// Translators: gets replaced with the generator name.
			$this->header_title = sprintf( __( '%s Generator', 'insert-headers-and-footers' ), $this->generators[ $this->generator ]->get_title() );
		}
	}

	/**
	 * Output the content of the page.
	 *
	 * @return void
	 */
	public function output_content() {
		if ( $this->generator ) {
			$this->show_generator();
		} else {
			$this->show_generators_list();
		}
	}

	/**
	 * Show the list of generators with categories.
	 *
	 * @return void
	 */
	public function show_generators_list() {
		$categories = wpcode()->generator()->get_categories();
		?>
		<div class="wpcode-items-metabox wpcode-metabox">
			<?php $this->get_items_list_sidebar( $categories, __( 'All Generators', 'insert-headers-and-footers' ), __( 'Search Generators' ) ); ?>
			<div class="wpcode-items-list">
				<ul class="wpcode-items-list-category">
					<?php
					foreach ( $this->generators as $generator ) {
						$url      = add_query_arg(
							array(
								'page'      => $this->page_slug,
								'generator' => $generator->get_name(),
							),
							admin_url( 'admin.php' )
						);
						$button_1 = array(
							'tag'  => 'a',
							'url'  => $url,
							'text' => __( 'Generate', 'insert-headers-and-footers' ),
						);
						$this->get_list_item( $generator->get_name(), $generator->get_title(), $generator->get_description(), $button_1, array(), $generator->get_categories() );
					}
					?>
				</ul>
			</div>
		</div>
		<?php
	}

	/**
	 * Show the generator based on the param.
	 *
	 * @return void
	 */
	public function show_generator() {
		$generator    = $this->generators[ $this->generator ];
		$tabs         = $generator->get_tabs();
		$snippet_data = array();
		if ( isset( $this->snippet ) ) {
			$snippet_data = $this->snippet->get_generator_data();
		}
		?>
		<form id="wpcode_generator_form">
			<div class="wpcode-items-metabox wpcode-metabox">
				<div class="wpcode-items-sidebar">
					<ul class="wpcode-items-categories-list wpcode-items-tabs">
						<?php
						$selected = key( $tabs );
						foreach ( $tabs as $tab_id => $tab ) {
							$class = $tab_id === $selected ? 'wpcode-active' : '';
							?>
							<li>
								<button type="button" class="<?php echo esc_attr( $class ); ?>" data-category="<?php echo esc_attr( $tab_id ); ?>"><?php echo esc_html( $tab['label'] ); ?></button>
							</li>
						<?php } ?>
					</ul>
				</div>
				<div class="wpcode-items-list">
					<?php
					foreach ( $tabs as $tab_id => $tab ) {
						$style = $selected === $tab_id ? '' : 'display:none;';
						?>
						<div class="wpcode-form-tab" data-tab="<?php echo esc_attr( $tab_id ); ?>" style="<?php echo esc_attr( $style ); ?>">
							<?php $generator->render_tab( $tab_id, $snippet_data ); ?>
						</div>
					<?php } ?>
					<div class="wpcode-generator-actions">
						<?php wp_nonce_field( 'wpcode_generate', 'nonce', false ); ?>
						<input type="hidden" name="type" value="<?php echo esc_attr( $this->generator ); ?>"/>
						<input type="hidden" name="action" value="wpcode_generate_snippet"/>
						<button type="submit" class="wpcode-button wpcode-button-secondary" id="wpcode-generator-update-code"><?php esc_html_e( 'Update code', 'insert-headers-and-footers' ); ?></button>
						<?php if ( ! empty( $this->snippet ) ) { ?>
							<input type="hidden" name="snippet_id" value="<?php echo absint( $this->snippet->get_id() ); ?>"/>
						<?php } ?>
					</div>
				</div>
			</div>
		</form>
		<div class="wpcode-generator-preview">
			<div class="wpcode-generator-preview-header">
				<h2><?php esc_html_e( 'Code Preview', 'insert-headers-and-footers' ); ?></h2>
				<?php
				if ( ! empty( $this->snippet ) ) {
					?>
					<button type="button" class="wpcode-button" id="wpcode-generator-use-snippet"><?php esc_html_e( 'Update Snippet', 'insert-headers-and-footers' ); ?></button>
				<?php } else { ?>
					<button type="button" class="wpcode-button" id="wpcode-generator-use-snippet"><?php esc_html_e( 'Use Snippet', 'insert-headers-and-footers' ); ?></button>
				<?php } ?>
				<button class="wpcode-button wpcode-button-icon wpcode-button-secondary wpcode-copy-target" data-target="#wpcode_generator_code_preview" type="button">
					<span class="wpcode-default-icon"><?php wpcode_icon( 'copy', 16, 16 ); ?></span><span class="wpcode-success-icon"><?php wpcode_icon( 'check', 16, 13 ); ?></span> <?php echo esc_html_x( 'Copy Code', 'Copy to clipboard', 'insert-headers-and-footers' ); ?>
				</button>
			</div>
			<textarea id="wpcode_generator_code_preview"><?php echo esc_textarea( $generator->get_snippet_code() ); ?></textarea>
		</div>
		<script type="text/template" id="wpcode-generator-repeater-row">
			<?php $this->repeater_group_template(); ?>
		</script>
		<?php
	}

	/**
	 * The bottom part of the header.
	 *
	 * @return void
	 */
	public function output_header_bottom() {
		?>
		<div class="wpcode-column">
			<h1><?php echo esc_html( $this->header_title ); ?></h1>
		</div>
		<?php
	}

	/**
	 * The template for the repeater row.
	 *
	 * @return void
	 */
	public function repeater_group_template() {
		?>
		<div class="wpcode-repeater-group">
			<button type="button" class="wpcode-button wpcode-button-secondary wpcode-remove-row"><?php esc_html_e( 'Remove Row', 'insert-headers-and-footers' ); ?></button>
		</div>
		<?php
	}

	/**
	 * Add page-specific scripts.
	 *
	 * @return void
	 */
	public function page_scripts() {
		if ( ! $this->generator ) {
			return;
		}
		$editor = new WPCode_Code_Editor( $this->code_type );
		$editor->set_setting( 'readOnly', 'nocursor' );
		$editor->register_editor( 'wpcode_generator_code_preview' );
		$editor->init_editor();

		wp_enqueue_script( 'jquery-ui-autocomplete' );
	}
}
