<?php
/**
 * Visual conflict detection: theme vs C7 brand values.
 *
 * @package C7DBT
 */

defined( 'ABSPATH' ) || exit;

class C7DBT_Visual_Match {

	/**
	 * Comparison pairs: label, theme key, brand key.
	 *
	 * @return array
	 */
	private function pairs() {
		return array(
			array(
				'id'         => 'button_bg',
				'label'      => __( 'Buy button background', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_primary',
				'brand_key'  => 'primary_button_bg',
				'type'       => 'color',
			),
			array(
				'id'         => 'button_text',
				'label'      => __( 'Button text color', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_button_text',
				'brand_key'  => 'primary_button_text_color',
				'type'       => 'color',
			),
			array(
				'id'         => 'body_text',
				'label'      => __( 'Body / widget text', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_text',
				'brand_key'  => 'text_color',
				'type'       => 'color',
			),
			array(
				'id'         => 'link',
				'label'      => __( 'Link color', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_link',
				'brand_key'  => 'link_color',
				'type'       => 'color',
			),
			array(
				'id'         => 'heading_font',
				'label'      => __( 'Heading font', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_heading_font',
				'brand_key'  => 'heading_font_family',
				'type'       => 'font',
			),
			array(
				'id'         => 'body_font',
				'label'      => __( 'Body font', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_body_font',
				'brand_key'  => 'font_family',
				'type'       => 'font',
			),
			array(
				'id'         => 'radius',
				'label'      => __( 'Button border radius', '7labs-debug-branding-for-commerce7' ),
				'theme_key'  => 'theme_button_radius',
				'brand_key'  => 'button_border_radius',
				'type'       => 'size',
			),
		);
	}

	/**
	 * Run comparisons.
	 *
	 * @return array
	 */
	public function get_conflicts() {
		$settings  = C7DBT_Settings::get();
		$brand     = $settings['brand'];
		$conflicts = array();

		// Auto-fill theme refs from Elementor if empty.
		$el = ( new C7DBT_Brand_Kit() )->read_elementor_kit();
		if ( empty( $settings['theme_primary'] ) && ! empty( $el['primary'] ) ) {
			$settings['theme_primary'] = $el['primary'];
		}
		if ( empty( $settings['theme_text'] ) && ! empty( $el['text'] ) ) {
			$settings['theme_text'] = $el['text'];
		}

		foreach ( $this->pairs() as $pair ) {
			$theme_val = isset( $settings[ $pair['theme_key'] ] ) ? (string) $settings[ $pair['theme_key'] ] : '';
			$brand_val = isset( $brand[ $pair['brand_key'] ] ) ? (string) $brand[ $pair['brand_key'] ] : '';

			$status = 'unknown';
			$detail = '';

			if ( '' === $theme_val && '' === $brand_val ) {
				$status = 'unknown';
				$detail = __( 'Set theme reference and C7 values to compare.', '7labs-debug-branding-for-commerce7' );
			} elseif ( '' === $theme_val ) {
				$status = 'unknown';
				$detail = __( 'Theme reference missing — enter it under Visual Match.', '7labs-debug-branding-for-commerce7' );
			} elseif ( '' === $brand_val ) {
				$status = 'mismatch';
				$detail = __( 'C7 override not set — widgets may use default Commerce7 styles.', '7labs-debug-branding-for-commerce7' );
			} elseif ( 'color' === $pair['type'] ) {
				if ( C7DBT_Helpers::colors_match( $theme_val, $brand_val ) ) {
					$status = 'match';
					$detail = __( 'Matched.', '7labs-debug-branding-for-commerce7' );
				} else {
					$status = 'mismatch';
					$detail = __( 'Colors differ — shop buttons may look off-brand.', '7labs-debug-branding-for-commerce7' );
				}
			} else {
				// Font / size: normalize loosely.
				$t = strtolower( preg_replace( '/\s+/', '', $theme_val ) );
				$b = strtolower( preg_replace( '/\s+/', '', $brand_val ) );
				$b = trim( $b, '",\'' );
				if ( $t === $b || false !== strpos( $b, $t ) || false !== strpos( $t, $b ) ) {
					$status = 'match';
					$detail = __( 'Matched.', '7labs-debug-branding-for-commerce7' );
				} else {
					$status = 'mismatch';
					$detail = __( 'Values differ from your theme reference.', '7labs-debug-branding-for-commerce7' );
				}
			}

			$conflicts[] = array(
				'id'        => $pair['id'],
				'label'     => $pair['label'],
				'theme'     => $theme_val,
				'c7'        => $brand_val,
				'status'    => $status,
				'detail'    => $detail,
				'theme_key' => $pair['theme_key'],
				'brand_key' => $pair['brand_key'],
			);
		}

		// Contrast check on button bg vs text.
		$bg   = ! empty( $brand['primary_button_bg'] ) ? $brand['primary_button_bg'] : ( $settings['theme_primary'] ?? '' );
		$text = ! empty( $brand['primary_button_text_color'] ) ? $brand['primary_button_text_color'] : ( $settings['theme_button_text'] ?? '' );
		if ( $bg && $text ) {
			$ratio = C7DBT_Helpers::contrast_ratio( $bg, $text );
			if ( null !== $ratio && $ratio < 4.5 ) {
				$conflicts[] = array(
					'id'        => 'contrast',
					'label'     => __( 'Button contrast', '7labs-debug-branding-for-commerce7' ),
					'theme'     => $bg,
					'c7'        => $text,
					'status'    => 'mismatch',
					'detail'    => sprintf(
						/* translators: %s: contrast ratio */
						__( 'Low contrast (%.2f:1). Aim for at least 4.5:1 for readable button text.', '7labs-debug-branding-for-commerce7' ),
						$ratio
					),
					'theme_key' => '',
					'brand_key' => '',
				);
			} elseif ( null !== $ratio ) {
				$conflicts[] = array(
					'id'        => 'contrast',
					'label'     => __( 'Button contrast', '7labs-debug-branding-for-commerce7' ),
					'theme'     => $bg,
					'c7'        => $text,
					'status'    => 'match',
					'detail'    => sprintf(
						/* translators: %s: contrast ratio */
						__( 'Contrast OK (%.2f:1).', '7labs-debug-branding-for-commerce7' ),
						$ratio
					),
					'theme_key' => '',
					'brand_key' => '',
				);
			}
		}

		return $conflicts;
	}

	/**
	 * Dashboard status.
	 *
	 * @return array
	 */
	public function status() {
		$items     = $this->get_conflicts();
		$mismatches = array_filter(
			$items,
			static function ( $i ) {
				return 'mismatch' === $i['status'];
			}
		);
		$count = count( $mismatches );
		if ( $count > 0 ) {
			return array(
				'status' => 'warn',
				'label'  => __( 'Visual mismatches', '7labs-debug-branding-for-commerce7' ),
				'detail' => sprintf(
					/* translators: %d: count */
					_n( '%d style conflict with your theme.', '%d style conflicts with your theme.', $count, '7labs-debug-branding-for-commerce7' ),
					$count
				),
				'count'  => $count,
			);
		}
		return array(
			'status' => 'ok',
			'label'  => __( 'Visual match looks good', '7labs-debug-branding-for-commerce7' ),
			'detail' => __( 'No button/text/font mismatches detected (based on your theme references).', '7labs-debug-branding-for-commerce7' ),
			'count'  => 0,
		);
	}
}