<?php

namespace TotalTheme\Page;

use TotalTheme\Error_404;
use TotalTheme\Replace_Vars;
use TotalTheme\Theme_Builder;

\defined( 'ABSPATH' ) || exit;

/**
 * Page Header Class.
 */
class Header {

	/**
	 * Is the page header is enabled or not.
	 */
	protected static $is_enabled;

	/**
	 * The page header style.
	 */
	protected static $style;

	/**
	 * Stores the subheading to prevent extra db checks.
	 */
	protected static $subheading;

	/**
	 * Returns the globally set style.
	 */
	public static function global_style() {
		return \get_theme_mod( 'page_header_style' );
	}

	/**
	 * Checks if the current style is the same as the global style.
	 */
	public static function is_global_style() {
		return ( self::global_style() === self::style() || 'default' === self::style() );
	}

	/**
	 * Checks if the header is enabled or not.
	 */
	public static function style() {
		if ( ! \is_null( self::$style ) ) {
			return self::$style;
		}

		$post_id = \wpex_get_current_post_id();
		$style   = self::global_style();

		if ( WPEX_PTU_ACTIVE ) {
			if ( \is_singular() ) {
				$post_type = \get_post_type();
				if ( 'wpex_templates' === $post_type && 'single' === \totaltheme_get_dynamic_template_type( $post_id ) ) {
					$template_single_type = Theme_Builder::instance()->get_post_type_from_template_id( $post_id );
					if ( $template_single_type ) {
						$post_type = $template_single_type;
					}
				}
				$custom_style = \wpex_get_ptu_type_mod( $post_type, 'page_header_title_style' );
				if ( $custom_style ) {
					$style = $custom_style;
				}
			} elseif ( \is_post_type_archive() ) {
				$custom_style = \wpex_get_ptu_type_mod( \get_query_var( 'post_type' ), 'archive_page_header_title_style' );
				if ( $custom_style ) {
					$style = $custom_style;
				}
			} elseif ( \is_tax() ) {
				$custom_style = \wpex_get_ptu_tax_mod( \get_query_var( 'taxonomy' ), 'page_header_title_style' );
				if ( $custom_style ) {
					$style = $custom_style;
				}
			}
		}

		if ( $post_id && $meta = \get_post_meta( $post_id, 'wpex_post_title_style', true ) ) {
			$style = $meta;
		}

		/**
		 * Filters the page header style.
		 *
		 * @param string $style
		 */
		$style = \apply_filters( 'totaltheme/page/header/style', $style );

		/*** deprecated ***/
		$style = (string) \apply_filters( 'wpex_page_header_style', $style );

		if ( empty( $style ) ) {
			$style = 'default';
		}

		self::$style = $style;

		return self::$style;
	}

	/**
	 * Checks if the header is enabled or not.
	 */
	public static function is_enabled() {
		if ( ! \is_null( self::$is_enabled ) ) {
			return self::$is_enabled;
		}

		$check = \get_theme_mod( 'enable_page_header', true );
		$is_singular = \is_singular();

		// Hide by default if style is set to hidden.
		if ( 'hidden' === self::style() ) {
			$check = false;
		}

		// Check on/off switches to see if the title is disabled for particular parts.
		if ( ! $is_singular && $check ) {
			if ( \wpex_is_blog_query() ) {
				$check = \get_theme_mod( 'blog_archive_has_page_header', $check );
			} elseif ( \is_post_type_archive() ) {
				$check = \get_theme_mod( get_query_var( 'post_type' ) . '_archive_has_page_header', $check );
			} elseif ( \wpex_is_staff_tax() ) {
				$check = \get_theme_mod( 'staff_archive_has_page_header', $check );
			} elseif ( \wpex_is_portfolio_tax() ) {
				$check = \get_theme_mod( 'portfolio_archive_has_page_header', $check );
			} elseif ( \wpex_is_testimonials_tax() ) {
				$check = \get_theme_mod( 'testimonials_archive_has_page_header', $check );
			} elseif ( \is_search() ) {
				// @todo rename mod to search_archive_has_page_header for consistency.
				$check = \get_theme_mod( 'search_has_page_header', $check );
			}
		}

		// Custom 404.
		if ( \is_404() ) {
			$check = Error_404::instance()->is_page_header_enabled();
		}

		// Woo Checks.
		if ( \defined( 'WPEX_WOOCOMMERCE_ACTIVE' ) && \WPEX_WOOCOMMERCE_ACTIVE && $check ) {
			if ( \wpex_is_woo_tax() ) {
				if ( ! \get_theme_mod( 'woo_archive_has_page_header', true ) ) {
					$check = false;
				}
			} elseif ( \wpex_is_woo_shop() ) {
				if ( ! \get_theme_mod( 'woo_shop_title', true ) ) {
					$check = false;
				}
			}
		}

		/**
		 * Filters whether if the page header is enabled.
		 * Runs before meta checks to ensure meta always overrides.
		 *
		 * @param bool $check
		 */
		$check = (bool) \apply_filters( 'wpex_has_page_header', $check );

		// Single post checks.
		if ( $post_id = \wpex_get_current_post_id() ) {

			if ( $is_singular && $check ) {
				if ( \function_exists( 'is_product' ) && \is_product() ) {
					$check = \get_theme_mod( 'woo_product_has_page_header', $check );
				} else {
					$post_type = \get_post_type();
					if ( 'wpex_templates' === $post_type ) {
						$template_type = \totaltheme_get_dynamic_template_type( $post_id );
						switch ( $template_type ) {
							case 'error_404':
								$check = Error_404::instance()->is_page_header_enabled();
								break;
							case 'archive':
								// @todo can we reverse check archives.
								break;
							case 'single':
								$template_single_type = Theme_Builder::instance()->get_post_type_from_template_id( $post_id );
								if ( $template_single_type ) {
									$check = \get_theme_mod( "{$template_single_type}_singular_page_title", $check );
								}
								break;
						}
					} else {
						$check = \get_theme_mod( "{$post_type}_singular_page_title", $check );
					}
				}
			}

			// Get page meta setting - MUST CHECK LAST.
			// @todo add new better meta field named something like wpex_has_title.
			$meta = \get_post_meta( $post_id, 'wpex_disable_title', true );
			if ( 'enable' === $meta ) {
				$check = true;
			} elseif ( 'on' === $meta ) {
				// Allow for a background-image page header style with the title disabled (so it only shows the image).
				if ( 'background-image' !== \get_post_meta( $post_id, 'wpex_post_title_style', true ) ) {
					$check = false;
				}
			}

		}

		/**
		 * Filters if the page header is enabled.
		 *
		 * @param bool $check
		 */
		$check = \apply_filters( 'totaltheme/page/header/is_enabled', $check );

		/*** deprecated ***/
		$check = (bool) apply_filters( 'wpex_display_page_header', $check );

		self::$is_enabled = $check;

		return self::$is_enabled;
	}

	/**
	 * Returns the page header breakpoint.
	 */
	public static function breakpoint(): string {
		$bk = \wpex_get_mod( 'page_header_breakpoint', 'md', true );

		/**
		 * Filters the page header breakpoint.
		 *
		 * @param string $bk
		 */
		$bk = \apply_filters( 'totaltheme/page/header/breakpoint', $bk );

		/*** deprecated ***/
		$bk = (string) apply_filters( 'wpex_page_header_breakpoint', $bk );

		return $bk;
	}

	/**
	 * Checks if the page header has a title.
	 */
	public static function has_title(): bool {
		$check   = true;
		$post_id = \wpex_get_current_post_id();

		if ( $post_id && 'on' === \get_post_meta( $post_id, 'wpex_disable_title', true ) ) {
			$check = false;
		}

		/**
		 * Filters whether the page title displays the title or not.
		 *
		 * @param bool $check
		 */
		$check = \apply_filters( 'totaltheme/page/header/has_title', $check );

		/*** deprecated ***/
		$check = (bool) \apply_filters( 'wpex_has_page_header_title', $check );

		return $check;
	}

	/**
	 * Checks if the page header has a subheading.
	 */
	public static function has_subheading(): bool {
		$check = (bool) self::get_subheading();

		/**
		 * Filters whether the page header has a subheading or not.
		 *
		 * @param string $check
		 */
		$check = \apply_filters( 'totaltheme/page/header/has_subheading', $check );

		/*** deprecated ***/
		$check = (bool) \apply_filters( 'wpex_page_header_has_subheading', $check );

		return $check;
	}

	/**
	 * Returns the subheading.
	 */
	public static function get_subheading(): string {
		if ( ! \is_null( self::$subheading ) ) {
			return self::$subheading;
		}

		$subheading = '';

		if ( $post_id = \wpex_get_current_post_id() ) {
			if ( $meta = \get_post_meta( $post_id, 'wpex_post_subheading', true ) ) {
				$subheading = $meta;
			}
		} elseif ( \is_category() || \is_tag() ) {
			$position = \get_theme_mod( 'category_description_position' );
			$position = $position ?: 'under_title';
			if ( 'under_title' === $position ) {
				$subheading = \term_description();
			}
		} elseif ( \is_author() ) {
			$subheading = \sprintf( \esc_html__( 'This author has written %s articles', 'total' ), \get_the_author_posts() );
		} elseif ( $tax = \is_tax() ) {
			if ( ! \wpex_has_term_description_above_loop() ) {
				$subheading = \term_description(); // note: get_the_archive_description makes extra check to is_author() which isn't needed
			}
		}

		/**
		 * Filters the page header subheading
		 *
		 * @param string $subheading
		 */
		$subheading = \apply_filters( 'totaltheme/page/header/subheading', $subheading );

		/*** deprecated ***/
		$subheading = (string) \apply_filters( 'wpex_post_subheading', $subheading, null );

		if ( $subheading ) {
			$subheading = (new Replace_Vars)->replace( $subheading );
		}

		self::$subheading = $subheading;

		return self::$subheading;
	}

}