<?php
/**
 * Category Customization
 * 
 * Adds custom fields for product categories:
 * - Background color picker
 * - Uses category thumbnail as background image
 * 
 * @package Matreshka
 */

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Add background color field when creating new category
 */
function matreshka_add_category_background_color_field() {
	?>
	<div class="form-field">
		<label for="category_bg_color"><?php esc_html_e( 'Background Color', 'matreshka' ); ?></label>
		<input type="text" name="category_bg_color" id="category_bg_color" value="" class="matreshka-color-picker" />
		<p class="description"><?php esc_html_e( 'Choose a background color for the category button', 'matreshka' ); ?></p>
	</div>
	<?php
}
add_action( 'product_cat_add_form_fields', 'matreshka_add_category_background_color_field' );

/**
 * Add background color field when editing category
 */
function matreshka_edit_category_background_color_field( $term ) {
	$bg_color = get_term_meta( $term->term_id, 'category_bg_color', true );
	?>
	<tr class="form-field">
		<th scope="row">
			<label for="category_bg_color"><?php esc_html_e( 'Background Color', 'matreshka' ); ?></label>
		</th>
		<td>
			<input type="text" name="category_bg_color" id="category_bg_color" value="<?php echo esc_attr( $bg_color ); ?>" class="matreshka-color-picker" />
			<p class="description"><?php esc_html_e( 'Choose a background color for the category button', 'matreshka' ); ?></p>
		</td>
	</tr>
	<?php
}
add_action( 'product_cat_edit_form_fields', 'matreshka_edit_category_background_color_field' );

/**
 * Save the background color field
 */
function matreshka_save_category_background_color( $term_id ) {
	if ( isset( $_POST['category_bg_color'] ) ) {
		update_term_meta( $term_id, 'category_bg_color', sanitize_hex_color( $_POST['category_bg_color'] ) );
	}
}
add_action( 'created_product_cat', 'matreshka_save_category_background_color' );
add_action( 'edited_product_cat', 'matreshka_save_category_background_color' );

/**
 * Enqueue color picker for category edit page
 */
function matreshka_category_color_picker_admin_scripts() {
	global $pagenow;
	
	// Only load on category pages
	if ( ( 'term.php' === $pagenow || 'edit-tags.php' === $pagenow ) && isset( $_GET['taxonomy'] ) && 'product_cat' === $_GET['taxonomy'] ) {
		// Enqueue WordPress color picker
		wp_enqueue_style( 'wp-color-picker' );
		wp_enqueue_script( 'wp-color-picker' );
		
		// Add inline script to initialize color picker
		wp_add_inline_script( 'wp-color-picker', '
			jQuery(document).ready(function($) {
				$(".matreshka-color-picker").wpColorPicker();
			});
		' );
	}
}
add_action( 'admin_enqueue_scripts', 'matreshka_category_color_picker_admin_scripts' );

/**
 * Helper function to get category button HTML with custom background
 * 
 * @param int $category_id Category term ID
 * @return string HTML for category button
 */
function matreshka_get_category_button_html( $category_id ) {
	$category = get_term( $category_id, 'product_cat' );
	
	if ( ! $category || is_wp_error( $category ) ) {
		return '';
	}
	
	$category_link = get_term_link( $category );
	
	// Get category thumbnail
	$thumbnail_id = get_term_meta( $category->term_id, 'thumbnail_id', true );
	$category_image = $thumbnail_id ? wp_get_attachment_url( $thumbnail_id ) : '';
	
	// Get custom background color
	$bg_color = get_term_meta( $category->term_id, 'category_bg_color', true );
	
	// Build inline style
	$style_parts = array();
	if ( $category_image ) {
		$style_parts[] = "background-image: url('" . esc_url( $category_image ) . "')";
		$style_parts[] = "background-size: cover";
	}
	if ( $bg_color ) {
		$style_parts[] = "background-color: " . esc_attr( $bg_color );
	}
	
	$inline_style = ! empty( $style_parts ) ? ' style="' . implode( '; ', $style_parts ) . '"' : '';
	
	return sprintf(
		'<a href="%s" class="btn btn-category montserrat-medium"%s>%s</a>',
		esc_url( $category_link ),
		$inline_style,
		esc_html( $category->name )
	);
}

/**
 * Get category background styles array
 * 
 * @param int $category_id Category term ID
 * @return array Array with 'image', 'color', and 'inline_style' keys
 */
function matreshka_get_category_background_styles( $category_id ) {
	// Get category thumbnail
	$thumbnail_id = get_term_meta( $category_id, 'thumbnail_id', true );
	$category_image = $thumbnail_id ? wp_get_attachment_url( $thumbnail_id ) : '';
	
	// Get custom background color
	$bg_color = get_term_meta( $category_id, 'category_bg_color', true );
	
	// Build inline style
	$style_parts = array();
	if ( $category_image ) {
		$style_parts[] = "background-image: url('" . esc_url( $category_image ) . "')";
	}
	if ( $bg_color ) {
		$style_parts[] = "background-color: " . esc_attr( $bg_color );
	}
	
	return array(
		'image'        => $category_image,
		'color'        => $bg_color,
		'inline_style' => ! empty( $style_parts ) ? ' style="' . implode( '; ', $style_parts ) . '"' : '',
	);
}