<?php
/**
 * Brand kit — outputs C7 CSS variable overrides.
 *
 * @package C7DBT
 */

defined( 'ABSPATH' ) || exit;

class C7DBT_Brand_Kit {

	/**
	 * Front-end hooks.
	 */
	public function hooks() {
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_front' ), 100 );
	}

	/**
	 * Enqueue generated CSS.
	 */
	public function enqueue_front() {
		$settings = C7DBT_Settings::get();
		$has_fonts = ! empty( $settings['font_heading_key'] ) || ! empty( $settings['font_body_key'] ) || ! empty( $settings['google_fonts_url'] );

		// Allow font-only branding even when color presets were never applied.
		if ( empty( $settings['branding_enabled'] ) && ! $has_fonts ) {
			return;
		}

		if ( is_customize_preview() ) {
			return;
		}
		if ( isset( $_GET['elementor-preview'] ) ) { // phpcs:ignore
			return;
		}

		$css = $this->build_css( $settings );
		if ( '' === trim( $css ) ) {
			return;
		}

		$deps = array();
		foreach ( array( 'c7wp', 'commerce7', 'c7-base', 'c7css', 'wp-commerce7', 'c7dbt-google-fonts' ) as $handle ) {
			if ( wp_style_is( $handle, 'registered' ) || wp_style_is( $handle, 'enqueued' ) ) {
				$deps[] = $handle;
			}
		}

		wp_register_style( 'c7dbt-branding', false, $deps, C7DBT_VERSION );
		wp_enqueue_style( 'c7dbt-branding' );
		wp_add_inline_style( 'c7dbt-branding', $css );
	}

	/**
	 * Build :root CSS variable overrides + extras.
	 *
	 * @param array $settings Settings.
	 * @return string
	 */
	public function build_css( array $settings ) {
		$map   = C7DBT_Settings::brand_css_map();
		$brand = isset( $settings['brand'] ) && is_array( $settings['brand'] ) ? $settings['brand'] : array();
		$scope = isset( $settings['brand_scope'] ) ? $settings['brand_scope'] : array();
		$rules = array();

		$button_keys = array( 'primary_button_bg', 'primary_button_bg_hover', 'primary_button_text_color', 'alt_button_bg', 'alt_button_bg_hover', 'alt_button_text_color', 'button_border_radius', 'primary_color', 'primary_color_dark', 'primary_color_focus' );
		$text_keys   = array( 'text_color', 'alt_text_color', 'link_color', 'header_text_color', 'heading_text_color', 'heading_font_family', 'font_family', 'font_size' );
		$form_keys   = array( 'field_border_radius', 'field_border_color', 'field_focus_color', 'block_bg', 'block_border_color', 'block_border_radius', 'modal_shadow', 'overlay_bg', 'bg_alt' );
		$cart_keys   = array( 'cart_count_bg', 'cart_count_text_color', 'header_text_color' );

		foreach ( $map as $key => $css_var ) {
			if ( empty( $brand[ $key ] ) ) {
				continue;
			}
			if ( in_array( $key, $button_keys, true ) && empty( $scope['buttons'] ) ) {
				continue;
			}
			if ( in_array( $key, $text_keys, true ) && empty( $scope['text'] ) ) {
				continue;
			}
			if ( in_array( $key, $form_keys, true ) && empty( $scope['forms'] ) ) {
				continue;
			}
			if ( in_array( $key, $cart_keys, true ) && empty( $scope['cart'] ) && ! in_array( $key, $text_keys, true ) ) {
				continue;
			}

			$val = $brand[ $key ];
			if ( false !== strpos( $key, 'font_family' ) || false !== strpos( $key, 'heading_font' ) ) {
				$val = $this->format_font_stack( $val );
			} elseif ( false !== strpos( $key, 'radius' ) || 'font_size' === $key ) {
				$val = $this->format_size( $val );
			} else {
				// Hex / rgba / shadow tokens — block CSS injection.
				$hex = sanitize_hex_color( $val );
				if ( $hex ) {
					$val = $hex;
				} elseif ( preg_match( '/^(rgba?|hsla?)\(\s*[\d.%,\s\/]+\)$/i', trim( (string) $val ) ) ) {
					$val = trim( (string) $val );
				} elseif ( 'modal_shadow' === $key ) {
					$val = preg_replace( '/[<>{};]/', '', (string) $val );
				} else {
					$val = preg_replace( '/[<>{};]/', '', (string) $val );
				}
			}
			if ( '' === $val ) {
				continue;
			}
			$rules[] = $css_var . ': ' . $val . ';';
		}

		$css = '';
		if ( $rules ) {
			$css .= ":root {\n\t" . implode( "\n\t", $rules ) . "\n}\n";
		}

		// Font library keys override Brand Kit text fields when set.
		$font_rules = array();
		$hf         = '';
		$bf         = '';
		if ( ! empty( $settings['font_heading_key'] ) && class_exists( 'C7DBT_Fonts', false ) ) {
			$hf = C7DBT_Fonts::css_family( $settings['font_heading_key'] );
			if ( $hf ) {
				$font_rules[] = '--c7-heading-font-family: ' . $hf . ';';
			}
		}
		if ( ! empty( $settings['font_body_key'] ) && class_exists( 'C7DBT_Fonts', false ) ) {
			$bf = C7DBT_Fonts::css_family( $settings['font_body_key'] );
			if ( $bf ) {
				$font_rules[] = '--c7-font-family: ' . $bf . ';';
			}
		}
		if ( ! empty( $brand['text_color'] ) ) {
			$hex = sanitize_hex_color( $brand['text_color'] );
			if ( $hex ) {
				$font_rules[] = '--c7-text-color: ' . $hex . ';';
				$font_rules[] = '--c7-body-text-color: ' . $hex . ';';
			}
		}
		if ( $font_rules ) {
			$css .= ":root {\n\t" . implode( "\n\t", $font_rules ) . "\n}\n";
		}

		// Direct selectors — C7 doesn't always consume CSS variables for every text node.
		if ( $hf || $bf ) {
			if ( $hf ) {
				$css .= "#c7-content .c7-product__title,\n#c7-content .c7-h1,\n#c7-content .c7-h2,\n#c7-content .c7-h3,\n";
				$css .= "#c7-content h1, #c7-content h2, #c7-content h3,\n#c7-content .c7-product-detail .c7-product__title {\n";
				$css .= "\tfont-family: {$hf} !important;\n}\n";
			}
			if ( $bf ) {
				$css .= "#c7-content,\n#c7-content .c7-product,\n#c7-content .c7-product__teaser,\n#c7-content .c7-product__subtitle,\n";
				$css .= "#c7-content .c7-product__details,\n#c7-content .c7-product__info,\n#c7-content .c7-btn,\n#c7-content button,\n#c7-content input,\n#c7-content select {\n";
				$css .= "\tfont-family: {$bf} !important;\n}\n";
			}
		}

		// Force readable body/muted text on light C7 surfaces (featured cards use --c7-bg-alt).
		$body_hex = ! empty( $brand['text_color'] ) ? sanitize_hex_color( $brand['text_color'] ) : '';
		$alt_hex  = ! empty( $brand['alt_text_color'] ) ? sanitize_hex_color( $brand['alt_text_color'] ) : '';
		$head_hex = ! empty( $brand['heading_text_color'] ) ? sanitize_hex_color( $brand['heading_text_color'] ) : $body_hex;
		if ( $body_hex || $alt_hex || $head_hex ) {
			if ( $body_hex ) {
				$css .= "#c7-content,\n#c7-content .c7-product,\n#c7-content .c7-product__details,\n#c7-content .c7-product__teaser,\n";
				$css .= "#c7-content .c7-product__content,\n#c7-content .c7-product__add-to-cart__price {\n";
				$css .= "\tcolor: {$body_hex} !important;\n}\n";
			}
			if ( $alt_hex ) {
				$css .= "#c7-content .c7-product__subtitle,\n#c7-content .c7-alt-text {\n";
				$css .= "\tcolor: {$alt_hex} !important;\n}\n";
			}
			if ( $head_hex ) {
				$css .= "#c7-content .c7-product__title,\n#c7-content .c7-product__title a,\n#c7-content h1,\n#c7-content .c7-h1 {\n";
				$css .= "\tcolor: {$head_hex} !important;\n}\n";
			}
		}

		if ( ! empty( $settings['hide_floating_cart_mobile'] ) ) {
			$css .= "@media (max-width: 768px) {\n\t#c7wp-cart-box { display: none !important; }\n}\n";
		}

		$tone = isset( $settings['cart_box_tone'] ) ? $settings['cart_box_tone'] : 'auto';
		if ( 'light' === $tone ) {
			$css .= "#c7wp-cart-box { background: #ffffff; color: #232324; box-shadow: 0 2px 12px rgba(0,0,0,.12); }\n";
		} elseif ( 'dark' === $tone ) {
			$css .= "#c7wp-cart-box { background: #1a1a1a; color: #f5f5f5; box-shadow: 0 2px 12px rgba(0,0,0,.35); }\n";
			$css .= "#c7wp-cart-box .c7-login, #c7wp-cart-box .c7-cart { color: inherit; }\n";
		}

		/**
		 * Filter generated branding CSS.
		 *
		 * @param string $css      CSS.
		 * @param array  $settings Settings.
		 */
		return apply_filters( 'c7dbt_branding_css', $css, $settings );
	}

	/**
	 * Format font family value.
	 *
	 * @param string $font Font.
	 * @return string
	 */
	private function format_font_stack( $font ) {
		$font = trim( wp_strip_all_tags( (string) $font ) );
		if ( '' === $font ) {
			return $font;
		}
		// Already a stack or quoted family — keep as-is after stripping risky chars.
		if ( false !== strpos( $font, ',' ) || ( isset( $font[0] ) && ( '"' === $font[0] || "'" === $font[0] ) ) ) {
			return preg_replace( '/[<>{};]/', '', $font );
		}
		$font = preg_replace( '/[^a-zA-Z0-9\s\-_]/', '', $font );
		return '"' . $font . '", sans-serif';
	}

	/**
	 * Ensure size has unit.
	 *
	 * @param string $size Size.
	 * @return string
	 */
	private function format_size( $size ) {
		$size = trim( $size );
		if ( '' === $size ) {
			return $size;
		}
		if ( is_numeric( $size ) ) {
			return $size . 'px';
		}
		return sanitize_text_field( $size );
	}

	/**
	 * Copy theme reference colors into brand kit.
	 *
	 * @return array Updated settings.
	 */
	public function match_theme_to_brand() {
		$settings = C7DBT_Settings::get();
		$brand    = $settings['brand'];

		if ( ! empty( $settings['theme_primary'] ) ) {
			$brand['primary_color']           = $settings['theme_primary'];
			$brand['primary_button_bg']       = $settings['theme_primary'];
			$brand['primary_button_bg_hover'] = $settings['theme_primary'];
			$brand['primary_color_dark']      = $settings['theme_primary'];
			$brand['primary_color_focus']     = $settings['theme_primary'];
			$brand['cart_count_bg']           = $settings['theme_primary'];
			$brand['link_color']              = $settings['theme_primary'];
			$brand['field_focus_color']       = $settings['theme_primary'];
		}
		if ( ! empty( $settings['theme_button_text'] ) ) {
			$brand['primary_button_text_color'] = $settings['theme_button_text'];
			$brand['cart_count_text_color']     = $settings['theme_button_text'];
		}
		if ( ! empty( $settings['theme_text'] ) ) {
			$brand['text_color']        = $settings['theme_text'];
			$brand['header_text_color'] = $settings['theme_text'];
		}
		if ( ! empty( $settings['theme_link'] ) ) {
			$brand['link_color'] = $settings['theme_link'];
		}
		if ( ! empty( $settings['theme_heading_font'] ) ) {
			$brand['heading_font_family'] = $settings['theme_heading_font'];
		}
		if ( ! empty( $settings['theme_body_font'] ) ) {
			$brand['font_family'] = $settings['theme_body_font'];
		}
		if ( ! empty( $settings['theme_button_radius'] ) ) {
			$brand['button_border_radius'] = $settings['theme_button_radius'];
			$brand['field_border_radius']  = $settings['theme_button_radius'];
		}

		$elementor = $this->read_elementor_kit();
		if ( empty( $brand['primary_button_bg'] ) && ! empty( $elementor['primary'] ) ) {
			$brand['primary_color']     = $elementor['primary'];
			$brand['primary_button_bg'] = $elementor['primary'];
			$brand['link_color']        = $elementor['primary'];
			$brand['cart_count_bg']     = $elementor['primary'];
		}
		if ( empty( $brand['text_color'] ) && ! empty( $elementor['text'] ) ) {
			$brand['text_color']        = $elementor['text'];
			$brand['header_text_color'] = $elementor['text'];
		}
		if ( empty( $brand['heading_font_family'] ) && ! empty( $elementor['heading_font'] ) ) {
			$brand['heading_font_family'] = $elementor['heading_font'];
		}
		if ( empty( $brand['font_family'] ) && ! empty( $elementor['body_font'] ) ) {
			$brand['font_family'] = $elementor['body_font'];
		}

		return C7DBT_Settings::update(
			array(
				'brand'            => $brand,
				'branding_enabled' => 1,
			)
		);
	}

	/**
	 * Pull Elementor kit into theme_* reference fields (without applying brand yet).
	 *
	 * @return array Updated settings.
	 */
	public function detect_theme_references() {
		$el       = $this->read_elementor_kit();
		$partial  = array();
		$settings = C7DBT_Settings::get();

		if ( ! empty( $el['primary'] ) ) {
			$partial['theme_primary'] = $el['primary'];
		}
		if ( ! empty( $el['text'] ) ) {
			$partial['theme_text'] = $el['text'];
		}
		if ( ! empty( $el['accent'] ) && empty( $partial['theme_link'] ) ) {
			$partial['theme_link'] = $el['accent'];
		} elseif ( ! empty( $el['primary'] ) ) {
			$partial['theme_link'] = $el['primary'];
		}
		if ( ! empty( $el['heading_font'] ) ) {
			$partial['theme_heading_font'] = $el['heading_font'];
		}
		if ( ! empty( $el['body_font'] ) ) {
			$partial['theme_body_font'] = $el['body_font'];
		}
		if ( empty( $settings['theme_button_text'] ) ) {
			$partial['theme_button_text'] = '#ffffff';
		}

		return C7DBT_Settings::update( $partial );
	}

	/**
	 * Best-effort Elementor kit colors + fonts.
	 *
	 * @return array
	 */
	public function read_elementor_kit() {
		$out = array(
			'primary'      => '',
			'text'         => '',
			'accent'       => '',
			'heading_font' => '',
			'body_font'    => '',
		);

		$mod = get_theme_mod( 'primary_color', '' );
		if ( $mod ) {
			$out['primary'] = C7DBT_Helpers::sanitize_hex_color( $mod );
		}

		if ( ! class_exists( '\Elementor\Plugin' ) ) {
			return $out;
		}

		$kit_id = get_option( 'elementor_active_kit' );
		if ( ! $kit_id ) {
			return $out;
		}

		$meta = get_post_meta( $kit_id, '_elementor_page_settings', true );
		if ( ! is_array( $meta ) ) {
			return $out;
		}

		if ( ! empty( $meta['system_colors'] ) && is_array( $meta['system_colors'] ) ) {
			foreach ( $meta['system_colors'] as $color ) {
				if ( empty( $color['_id'] ) || empty( $color['color'] ) ) {
					continue;
				}
				$hex = C7DBT_Helpers::sanitize_hex_color( $color['color'] );
				if ( 'primary' === $color['_id'] ) {
					$out['primary'] = $hex;
				}
				if ( in_array( $color['_id'], array( 'text', 'secondary' ), true ) && empty( $out['text'] ) ) {
					$out['text'] = $hex;
				}
				if ( 'accent' === $color['_id'] ) {
					$out['accent'] = $hex;
				}
			}
		}

		if ( ! empty( $meta['system_typography'] ) && is_array( $meta['system_typography'] ) ) {
			foreach ( $meta['system_typography'] as $typo ) {
				if ( empty( $typo['_id'] ) ) {
					continue;
				}
				$family = '';
				if ( ! empty( $typo['typography_font_family'] ) ) {
					$family = $typo['typography_font_family'];
				}
				if ( 'primary' === $typo['_id'] || 'heading' === $typo['_id'] ) {
					$out['heading_font'] = $family ? $family : $out['heading_font'];
				}
				if ( 'secondary' === $typo['_id'] || 'text' === $typo['_id'] || 'body' === $typo['_id'] ) {
					$out['body_font'] = $family ? $family : $out['body_font'];
				}
			}
		}

		return $out;
	}

	/**
	 * Export brand kit as array for JSON download.
	 *
	 * @return array
	 */
	public function export_payload() {
		$settings = C7DBT_Settings::get();
		return array(
			'plugin'       => '7labs-debug-branding-for-commerce7',
			'version'      => C7DBT_VERSION,
			'exported_at'  => gmdate( 'c' ),
			'brand'        => $settings['brand'],
			'brand_scope'  => $settings['brand_scope'],
			'theme'        => array(
				'theme_primary'       => $settings['theme_primary'],
				'theme_button_text'   => $settings['theme_button_text'],
				'theme_text'          => $settings['theme_text'],
				'theme_link'          => $settings['theme_link'],
				'theme_heading_font'  => $settings['theme_heading_font'],
				'theme_body_font'     => $settings['theme_body_font'],
				'theme_button_radius' => $settings['theme_button_radius'],
			),
		);
	}

	/**
	 * Import brand payload.
	 *
	 * @param array $data Data.
	 * @return bool
	 */
	public function import_payload( array $data ) {
		$partial = array();
		if ( ! empty( $data['brand'] ) && is_array( $data['brand'] ) ) {
			$partial['brand'] = array_merge( C7DBT_Settings::default_brand(), array_intersect_key( $data['brand'], C7DBT_Settings::default_brand() ) );
			$partial['branding_enabled'] = 1;
		}
		if ( ! empty( $data['brand_scope'] ) && is_array( $data['brand_scope'] ) ) {
			$partial['brand_scope'] = $data['brand_scope'];
		}
		if ( ! empty( $data['theme'] ) && is_array( $data['theme'] ) ) {
			$partial = array_merge( $partial, $data['theme'] );
		}
		if ( empty( $partial ) ) {
			return false;
		}
		C7DBT_Settings::update( C7DBT_Settings::sanitize( $partial ) );
		return true;
	}

	/**
	 * Status.
	 *
	 * @return array
	 */
	public function status() {
		$settings = C7DBT_Settings::get();
		if ( empty( $settings['branding_enabled'] ) ) {
			return array(
				'status' => 'warn',
				'label'  => __( 'Branding overrides off', '7labs-debug-branding-for-commerce7' ),
				'detail' => __( 'Enable Brand Kit to match C7 widgets to your theme.', '7labs-debug-branding-for-commerce7' ),
			);
		}
		$filled = 0;
		foreach ( $settings['brand'] as $v ) {
			if ( '' !== (string) $v ) {
				++$filled;
			}
		}
		if ( 0 === $filled ) {
			return array(
				'status' => 'warn',
				'label'  => __( 'No brand colors set', '7labs-debug-branding-for-commerce7' ),
				'detail' => __( 'Apply a preset, detect Elementor colors, or edit Brand Kit manually.', '7labs-debug-branding-for-commerce7' ),
			);
		}
		return array(
			'status' => 'ok',
			'label'  => __( 'Brand Kit active', '7labs-debug-branding-for-commerce7' ),
			'detail' => sprintf(
				/* translators: %d: count */
				__( '%d style overrides applied on the front end.', '7labs-debug-branding-for-commerce7' ),
				$filled
			),
		);
	}
}