<?php

namespace TotalTheme\Theme_Builder;

use Wt_Gc_Gift_Card_Common;

defined( 'ABSPATH' ) || exit;

/**
 * Returns the template to use for the current post.
 */
class Post_Template {

	/**
	 * Store check if post has template.
	 */
	protected static $has_template;

	/**
	 * Stores the current template id.
	 */
	protected static $template_id;

	/**
	 * Checks if wp has loaded.
	 */
	protected static function wp_loaded(): bool {
		return (bool) did_action( 'wp_loaded' );
	}

	/**
	 * Helper function checks if the current post has a template.
	 */
	public static function has_template(): bool {
		if ( null !== self::$has_template && self::wp_loaded() ) {
			return self::$has_template;
		}
		self::$has_template = (bool) self::get_template_content();
		return self::$has_template;
	}

	/**
	 * Get the post template id.
	 */
	public static function get_template_id( $post_type = '' ) {
		$template_id = self::$template_id;
		if ( null === $template_id ) {
			$post_id = is_admin() ? get_the_ID() : wpex_get_current_post_id(); // this is very important!!!!
			if ( ! $post_type ) {
				$post_type = get_post_type( $post_id );
			}
			if ( $post_id && $meta = get_post_meta( $post_id, 'wpex_singular_template', true ) ) {
				$template_id = $meta;
			} else {
				if ( function_exists( 'is_product' ) && is_product() ) {
					if ( ! is_callable( 'Wt_Gc_Gift_Card_Common::is_gift_card_product' )
						|| ! Wt_Gc_Gift_Card_Common::is_gift_card_product( get_the_ID() )
					) {
						$template_id = get_theme_mod( 'woo_singular_template' );
					}
				} else {
					if ( $ptu_template_id = wpex_get_ptu_type_mod( $post_type, 'singular_template_id' ) ) {
						$template_id = $ptu_template_id;
					} else {
						$template_id = get_theme_mod( "{$post_type}_singular_template" );
						if ( taxonomy_exists( 'post_series' ) ) {
							$series_template_id = get_theme_mod( 'post_series_singular_template' );
							if ( $series_template_id && get_the_terms( get_the_id(), 'post_series' ) ) {
								$template_id = $series_template_id;
							}
						}
					}
				}
			}
			if ( did_action( 'wp' ) ) {
				/**
				 * Cache template ID for future use.
				 *
				 * @note we only cache the id once wp has fired to prevent issues with meta checks
				 * if this method was called too early and we don't cache the filters.
				 */
				self::$template_id = $template_id;
			}
		}
		$template_id = apply_filters( 'wpex_get_singular_template_id', $template_id, $post_type ); // @deprecated
		return (int) apply_filters( 'wpex_singular_template_id', $template_id, $post_type );
	}

	/**
	 * Return current post template content.
	 */
	public static function get_template_content( $post_type = '' ) {
		$template_id = self::get_template_id( $post_type );
		$template_id = $template_id ? wpex_parse_obj_id( $template_id, 'page' ) : false;
		if ( empty( $template_id ) ) {
			return;
		}
		$post = get_post( $template_id );
		if ( $post && 'publish' === get_post_status( $post ) ) {
			return $post->post_content;
		}
	}

	/**
	 * Render post template.
	 */
	public static function render_template( $template_content = '', $parse_content = true ) {
		$parsed_content = $parse_content ? totaltheme_render_content( $template_content ) : $template_content;

		// Define template class
		$class = [
			'custom-singular-template',
			'entry',
			'wpex-clr',
		];

		// Add WooCoommerce product class and structured data
		if ( function_exists( 'wc_get_product_class' ) && is_singular( 'product' ) ) {
			$class = array_unique( array_merge( $class, (array) wc_get_product_class() ) );
			if ( function_exists( 'WC' )
				&& isset( WC()->structured_data )
				&& is_callable( [ WC()->structured_data, 'generate_product_data' ] )
			) {
				WC()->structured_data->generate_product_data();
			}
		}

		// Get template element tag
		$tag        = 'div';
		$custom_tag = get_post_meta( self::get_template_id(), 'wpex_element_tag', true );
		if ( $custom_tag && in_array( $custom_tag, [ 'div', 'article' ], true ) ) {
			$tag = $custom_tag;
		}
		$tag = (string) apply_filters( 'wpex_singular_template_html_tag', $tag );
		$tag_escaped = tag_escape( $tag );

		// Render template
		echo '<' . $tag_escaped . ' class="' . esc_attr( implode( ' ', $class ) ) . '">' . $parsed_content . '</' . $tag_escaped . '>';
		return true;
	}

}