<?php
/**
 * Plugin settings storage.
 *
 * @package C7DBT
 */

defined( 'ABSPATH' ) || exit;

class C7DBT_Settings {

	/**
	 * Default settings.
	 *
	 * @return array
	 */
	public static function defaults() {
		return array(
			'default_collection_slug'   => 'wines',
			'redirect_collection_root'  => 1,
			'redirect_product_root'     => 0,
			'product_redirect_target'   => '',
			'custom_redirects'          => array(),
			'update_continue_shopping'  => 1,
			'enable_c7_custom_routes'   => 0,
			'branding_enabled'          => 1,
			'brand_scope'               => array(
				'buttons' => 1,
				'text'    => 1,
				'forms'   => 1,
				'cart'    => 1,
			),
			'theme_primary'             => '',
			'theme_button_text'         => '',
			'theme_text'                => '',
			'theme_link'                => '',
			'theme_heading_font'        => '',
			'theme_body_font'           => '',
			'theme_button_radius'       => '',
			'brand'                     => self::default_brand(),
			'hide_floating_cart_mobile' => 0,
			'cart_box_tone'             => 'auto',
			'show_admin_notices'        => 1,
			// Optional front-end credit link. Opt-in, default OFF (WordPress.org Guideline 10).
			'frontend_credit'           => 0,
			// Shop Layout — defaults match Commerce7 CDN (commerce7.css).
			'layout_enabled'            => 1,
			'layout_card_style'         => 'horizontal',
			'layout_cols_desktop'       => 2,
			'layout_cols_tablet'        => 2,
			'layout_cols_mobile'        => 1,
			'layout_col_gap'            => 30,
			'layout_row_gap'            => 80,
			'layout_page_width'         => 1300,
			'layout_pdp_preset'         => 'classic',
			'layout_builder_mode'       => 'auto',
			// Fonts.
			'font_heading_key'          => 'google:DM Sans',
			'font_body_key'             => 'google:DM Sans',
			'google_fonts_url'          => '',
			'custom_fonts'              => array(),
		);
	}

	/**
	 * Default Commerce7 brand CSS variable values.
	 *
	 * @return array
	 */
	public static function default_brand() {
		return array(
			'primary_color'             => '',
			'primary_color_dark'        => '',
			'primary_color_focus'       => '',
			'primary_button_bg'         => '',
			'primary_button_bg_hover'   => '',
			'primary_button_text_color' => '',
			'alt_button_bg'             => '',
			'alt_button_bg_hover'       => '',
			'alt_button_text_color'     => '',
			'text_color'                => '',
			'alt_text_color'            => '',
			'link_color'                => '',
			'header_text_color'         => '',
			'heading_text_color'        => '',
			'heading_font_family'       => '',
			'font_family'               => '',
			'font_size'                 => '18px',
			'button_border_radius'      => '',
			'field_border_radius'       => '',
			'field_border_color'        => '',
			'field_focus_color'         => '',
			'cart_count_bg'             => '',
			'cart_count_text_color'     => '',
			'bg_alt'                    => '',
			'block_bg'                  => '',
			'block_border_color'        => '',
			'block_border_radius'       => '',
			'modal_shadow'              => '',
			'overlay_bg'                => '',
		);
	}

	/**
	 * Map brand keys to CSS custom properties.
	 *
	 * @return array
	 */
	public static function brand_css_map() {
		return array(
			'primary_color'             => '--c7-primary-color',
			'primary_color_dark'        => '--c7-primary-color-dark',
			'primary_color_focus'       => '--c7-primary-color-focus',
			'primary_button_bg'         => '--c7-primary-button-bg',
			'primary_button_bg_hover'   => '--c7-primary-button-bg-hover',
			'primary_button_text_color' => '--c7-primary-button-text-color',
			'alt_button_bg'             => '--c7-alt-button-bg',
			'alt_button_bg_hover'       => '--c7-alt-button-bg-hover',
			'alt_button_text_color'     => '--c7-alt-button-text-color',
			'text_color'                => '--c7-body-text-color',
			'alt_text_color'            => '--c7-alt-text-color',
			'link_color'                => '--c7-link-color',
			'header_text_color'         => '--c7-header-text-color',
			'heading_text_color'        => '--c7-heading-text-color',
			'heading_font_family'       => '--c7-heading-font-family',
			'font_family'               => '--c7-font-family',
			'font_size'                 => '--c7-font-size',
			'button_border_radius'      => '--c7-button-border-radius',
			'field_border_radius'       => '--c7-field-border-radius',
			'field_border_color'        => '--c7-field-border-color',
			'field_focus_color'         => '--c7-field-focus-color',
			'cart_count_bg'             => '--c7-cart-count-bg',
			'cart_count_text_color'     => '--c7-cart-count-text-color',
			'bg_alt'                    => '--c7-bg-alt',
			'block_bg'                  => '--c7-block-bg',
			'block_border_color'        => '--c7-block-border-color',
			'block_border_radius'       => '--c7-block-border-radius',
			'modal_shadow'              => '--c7-modal-shadow',
			'overlay_bg'                => '--c7-overlay-bg',
		);
	}

	/**
	 * Get merged settings.
	 *
	 * @return array
	 */
	public static function get() {
		$stored = get_option( C7DBT_OPTION_KEY, array() );
		if ( ! is_array( $stored ) ) {
			$stored = array();
		}
		$defaults            = self::defaults();
		$merged              = array_merge( $defaults, $stored );
		$merged['brand']     = array_merge( self::default_brand(), isset( $stored['brand'] ) && is_array( $stored['brand'] ) ? $stored['brand'] : array() );
		$merged['brand_scope'] = array_merge( $defaults['brand_scope'], isset( $stored['brand_scope'] ) && is_array( $stored['brand_scope'] ) ? $stored['brand_scope'] : array() );
		if ( empty( $merged['custom_redirects'] ) || ! is_array( $merged['custom_redirects'] ) ) {
			$merged['custom_redirects'] = array();
		}
		if ( empty( $merged['custom_fonts'] ) || ! is_array( $merged['custom_fonts'] ) ) {
			$merged['custom_fonts'] = array();
		}
		$merged['default_collection_slug'] = C7DBT_Helpers::normalize_collection_slug( $merged['default_collection_slug'] );
		return $merged;
	}

	/**
	 * Update settings (partial merge).
	 *
	 * @param array $partial Partial settings.
	 * @return array
	 */
	public static function update( array $partial ) {
		$current = self::get();
		if ( isset( $partial['brand'] ) && is_array( $partial['brand'] ) ) {
			$partial['brand'] = array_merge( $current['brand'], $partial['brand'] );
		}
		if ( isset( $partial['brand_scope'] ) && is_array( $partial['brand_scope'] ) ) {
			$partial['brand_scope'] = array_merge( $current['brand_scope'], $partial['brand_scope'] );
		}
		$new = array_merge( $current, $partial );
		update_option( C7DBT_OPTION_KEY, $new, false );
		return $new;
	}

	/**
	 * Sanitize settings from admin POST.
	 *
	 * @param array $input Raw input.
	 * @return array
	 */
	public static function sanitize( array $input ) {
		$out = self::get();

		if ( isset( $input['default_collection_slug'] ) ) {
			$out['default_collection_slug'] = C7DBT_Helpers::normalize_collection_slug( $input['default_collection_slug'] );
		}
		$out['redirect_collection_root'] = empty( $input['redirect_collection_root'] ) ? 0 : 1;
		$out['redirect_product_root']    = empty( $input['redirect_product_root'] ) ? 0 : 1;
		if ( isset( $input['product_redirect_target'] ) ) {
			$out['product_redirect_target'] = C7DBT_Helpers::sanitize_slug( $input['product_redirect_target'] );
		}
		$out['update_continue_shopping']  = empty( $input['update_continue_shopping'] ) ? 0 : 1;
		$out['enable_c7_custom_routes']   = empty( $input['enable_c7_custom_routes'] ) ? 0 : 1;
		$out['branding_enabled']          = empty( $input['branding_enabled'] ) ? 0 : 1;
		$out['hide_floating_cart_mobile'] = empty( $input['hide_floating_cart_mobile'] ) ? 0 : 1;

		// Only flip these when saving the Settings screen (checkboxes omitted when unchecked).
		if ( isset( $input['c7dbt_form'] ) && 'settings' === $input['c7dbt_form'] ) {
			$out['show_admin_notices'] = empty( $input['show_admin_notices'] ) ? 0 : 1;
			$out['frontend_credit']    = empty( $input['frontend_credit'] ) ? 0 : 1;
		}

		if ( isset( $input['cart_box_tone'] ) ) {
			$tone = sanitize_key( $input['cart_box_tone'] );
			$out['cart_box_tone'] = in_array( $tone, array( 'auto', 'light', 'dark' ), true ) ? $tone : 'auto';
		}

		if ( isset( $input['brand_scope'] ) && is_array( $input['brand_scope'] ) ) {
			foreach ( array( 'buttons', 'text', 'forms', 'cart' ) as $scope ) {
				$out['brand_scope'][ $scope ] = empty( $input['brand_scope'][ $scope ] ) ? 0 : 1;
			}
		} elseif ( isset( $input['c7dbt_form'] ) && 'brand' === $input['c7dbt_form'] ) {
			// Checkboxes omitted when unchecked.
			$out['brand_scope'] = array(
				'buttons' => empty( $input['brand_scope']['buttons'] ) ? 0 : 1,
				'text'    => empty( $input['brand_scope']['text'] ) ? 0 : 1,
				'forms'   => empty( $input['brand_scope']['forms'] ) ? 0 : 1,
				'cart'    => empty( $input['brand_scope']['cart'] ) ? 0 : 1,
			);
		}

		foreach ( array( 'theme_primary', 'theme_button_text', 'theme_text', 'theme_link' ) as $color_key ) {
			if ( isset( $input[ $color_key ] ) ) {
				$out[ $color_key ] = C7DBT_Helpers::sanitize_hex_color( $input[ $color_key ] );
			}
		}
		foreach ( array( 'theme_heading_font', 'theme_body_font', 'theme_button_radius' ) as $text_key ) {
			if ( isset( $input[ $text_key ] ) ) {
				$out[ $text_key ] = sanitize_text_field( $input[ $text_key ] );
			}
		}

		if ( isset( $input['brand'] ) && is_array( $input['brand'] ) ) {
			$brand_defaults = self::default_brand();
			foreach ( $brand_defaults as $key => $default ) {
				if ( ! array_key_exists( $key, $input['brand'] ) ) {
					continue;
				}
				$val = $input['brand'][ $key ];
				if ( false !== strpos( $key, 'font' ) || 'font_size' === $key || false !== strpos( $key, 'radius' ) || 'modal_shadow' === $key || 'overlay_bg' === $key ) {
					$out['brand'][ $key ] = sanitize_text_field( $val );
				} else {
					$out['brand'][ $key ] = C7DBT_Helpers::sanitize_hex_color( $val );
				}
			}
		}

		if ( isset( $input['custom_redirects'] ) && is_array( $input['custom_redirects'] ) ) {
			$clean = array();
			foreach ( $input['custom_redirects'] as $row ) {
				if ( empty( $row['from'] ) || empty( $row['to'] ) ) {
					continue;
				}
				$clean[] = array(
					'from' => '/' . ltrim( C7DBT_Helpers::sanitize_slug( $row['from'] ), '/' ),
					'to'   => '/' . ltrim( C7DBT_Helpers::sanitize_slug( $row['to'] ), '/' ),
				);
			}
			$out['custom_redirects'] = $clean;
		}

		// Shop Layout.
		if ( isset( $input['c7dbt_form'] ) && 'layout' === $input['c7dbt_form'] ) {
			$out['layout_enabled'] = empty( $input['layout_enabled'] ) ? 0 : 1;
		} elseif ( isset( $input['layout_enabled'] ) ) {
			$out['layout_enabled'] = empty( $input['layout_enabled'] ) ? 0 : 1;
		}

		if ( isset( $input['layout_card_style'] ) ) {
			$style = sanitize_key( $input['layout_card_style'] );
			$out['layout_card_style'] = in_array( $style, array( 'catalog', 'horizontal', 'auto' ), true ) ? $style : 'horizontal';
		}
		foreach ( array( 'layout_cols_desktop', 'layout_cols_tablet', 'layout_cols_mobile' ) as $col_key ) {
			if ( isset( $input[ $col_key ] ) ) {
				$out[ $col_key ] = max( 1, min( 4, absint( $input[ $col_key ] ) ) );
			}
		}
		foreach ( array( 'layout_col_gap', 'layout_row_gap' ) as $gap_key ) {
			if ( isset( $input[ $gap_key ] ) ) {
				$out[ $gap_key ] = max( 0, min( 120, absint( $input[ $gap_key ] ) ) );
			}
		}
		if ( isset( $input['layout_page_width'] ) ) {
			$out['layout_page_width'] = max( 800, min( 1600, absint( $input['layout_page_width'] ) ) );
		}
		if ( isset( $input['layout_pdp_preset'] ) ) {
			$pdp = sanitize_key( $input['layout_pdp_preset'] );
			$out['layout_pdp_preset'] = in_array( $pdp, array( 'classic', 'balanced', 'stacked', 'centered' ), true ) ? $pdp : 'classic';
		}
		if ( isset( $input['layout_builder_mode'] ) ) {
			$mode = sanitize_key( $input['layout_builder_mode'] );
			$allowed = array( 'auto', 'gutenberg', 'elementor', 'divi', 'bricks', 'oxygen', 'off' );
			$out['layout_builder_mode'] = in_array( $mode, $allowed, true ) ? $mode : 'auto';
		}

		// Fonts.
		if ( isset( $input['font_heading_key'] ) ) {
			$out['font_heading_key'] = sanitize_text_field( $input['font_heading_key'] );
		}
		if ( isset( $input['font_body_key'] ) ) {
			$out['font_body_key'] = sanitize_text_field( $input['font_body_key'] );
		}
		if ( isset( $input['google_fonts_url'] ) ) {
			$url = esc_url_raw( $input['google_fonts_url'] );
			$host = $url ? wp_parse_url( $url, PHP_URL_HOST ) : '';
			$out['google_fonts_url'] = ( $url && in_array( $host, array( 'fonts.googleapis.com', 'fonts.gstatic.com' ), true ) ) ? $url : '';
		}

		return $out;
	}
}