<?php

namespace AdvancedShippingRulesForWoocommerce;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'Helper' ) ) {
	class Helper {

		/**
		 * Retrieves an array of condition types.
		 *
		 * Operators keys should be only string, avoid use '<' symbol which will be sanitize using sanitize_key(), instead use 'less_than'
		 *
		 * @return array The list of condition types.
		 */
		public static function get_condition_types(): array {
			$condition_types = apply_filters(
				'asrfwoo_condition_types',
				array(
					'total_weight'    => array(
						// Translators: %s is the weight unit set in WooCommerce settings.
						'description' => sprintf( __( 'Total Weight (%s)', 'advanced-shipping-rules-for-woocommerce' ), get_option( 'woocommerce_weight_unit' ) ),
						'operators'   => array(
							'greater_than'          => __( 'Greater than', 'advanced-shipping-rules-for-woocommerce' ),
							'greater_than_or_equal' => __( 'Greater than or equal to', 'advanced-shipping-rules-for-woocommerce' ),
							'less_than'             => __( 'Less than', 'advanced-shipping-rules-for-woocommerce' ),
							'less_than_or_equal'    => __( 'Less than or equal to', 'advanced-shipping-rules-for-woocommerce' ),
							'equal'                 => __( 'Equal to', 'advanced-shipping-rules-for-woocommerce' ),
						),
						'placeholder' => __( 'Enter weight', 'advanced-shipping-rules-for-woocommerce' ),
						'input_type'  => 'number',
						'step'        => 'any',
					),
					'products_number' => array(
						'description' => __( 'Products Number', 'advanced-shipping-rules-for-woocommerce' ),
						'operators'   => array(
							'greater_than'          => __( 'Greater than', 'advanced-shipping-rules-for-woocommerce' ),
							'greater_than_or_equal' => __( 'Greater than or equal to', 'advanced-shipping-rules-for-woocommerce' ),
							'less_than'             => __( 'Less than', 'advanced-shipping-rules-for-woocommerce' ),
							'less_than_or_equal'    => __( 'Less than or equal to', 'advanced-shipping-rules-for-woocommerce' ),
							'equal'                 => __( 'Equal to', 'advanced-shipping-rules-for-woocommerce' ),
						),
						'placeholder' => __( 'Enter number of products', 'advanced-shipping-rules-for-woocommerce' ),
						'input_type'  => 'number',
						'step'        => '1',
					),
					'cart_total'      => array(
						'description' => __( 'Cart Total', 'advanced-shipping-rules-for-woocommerce' ),
						'operators'   => array(
							'greater_than'          => __( 'Greater than', 'advanced-shipping-rules-for-woocommerce' ),
							'greater_than_or_equal' => __( 'Greater than or equal to', 'advanced-shipping-rules-for-woocommerce' ),
							'less_than'             => __( 'Less than', 'advanced-shipping-rules-for-woocommerce' ),
							'less_than_or_equal'    => __( 'Less than or equal to', 'advanced-shipping-rules-for-woocommerce' ),
							'equal'                 => __( 'Equal to', 'advanced-shipping-rules-for-woocommerce' ),
						),
						'placeholder' => __( 'Enter cart total', 'advanced-shipping-rules-for-woocommerce' ),
						'input_type'  => 'number',
						'step'        => 'any',
					),
				)
			);

			return $condition_types;
		}


		/**
		 * Generates the HTML output for a shipping condition.
		 *
		 * @param string $condition_id The ID of the condition. Default is '%%CONDITION_ID_PLACEHOLDER%%'.
		 * @param string $group_id The ID of the group. Default is '%%GROUP_ID_PLACEHOLDER%%'.
		 * @return string The generated HTML for the shipping condition.
		 */
		public static function generate_html_shipping_condition( $condition_id = '%%CONDITION_ID_PLACEHOLDER%%', $group_id = '%%GROUP_ID_PLACEHOLDER%%' ): string {

			// Sanitize input IDs
			$condition_id = sanitize_text_field( $condition_id );
			$group_id     = sanitize_text_field( $group_id );

			// Retrieve and sanitize condition values
			$condition = array(
				'type'     => sanitize_text_field( get_post_meta( $condition_id, '_condition_type', true ) ?: '' ),
				'operator' => sanitize_text_field( get_post_meta( $condition_id, '_operator', true ) ?: '' ),
			);

			// Get valid condition types
			$condition_types = self::get_condition_types();

			// Validate condition type
			$valid_condition_types = array_keys( $condition_types );
			if ( ! in_array( $condition['type'], $valid_condition_types, true ) && $condition_id !== '%%CONDITION_ID_PLACEHOLDER%%' ) {
				return '';
			}

			// Get input type and step for selected condition type
			$input_type = $condition_types[ $condition['type'] ]['input_type'] ?? 'number';
			$step       = $condition_types[ $condition['type'] ]['step'] ?? 'any';

			// Conditionally sanitize value based on input type
			$raw_value          = (string) ( get_post_meta( $condition_id, '_value', true ) ?? '' );
			$condition['value'] = ( $input_type === 'number' ) ? ( $raw_value !== '' ? floatval( $raw_value ) : '' ) : sanitize_text_field( $raw_value );

			$available_operators         = $condition_types[ $condition['type'] ]['operators'] ?? array();
			$placeholder_for_value_field = $condition_types[ $condition['type'] ]['placeholder'] ?? __( 'Enter value', 'advanced-shipping-rules-for-woocommerce' );

			ob_start();
			?>
		
			<div class="wcasr-condition">
				
				<select name="asrfwoo_shipping_condition[<?php echo esc_attr( $group_id ); ?>][<?php echo esc_attr( $condition_id ); ?>][condition-type]" class="condition-type">
					<option value="" disabled <?php selected( $condition['type'] === '', true ); ?>>
						<?php esc_html_e( 'Select a condition type', 'advanced-shipping-rules-for-woocommerce' ); ?>
					</option>
					<?php foreach ( $condition_types as $type_key => $type_data ) : ?>
					<option value="<?php echo esc_attr( $type_key ); ?>" <?php selected( $condition['type'], $type_key ); ?>>
						<?php echo esc_html( $type_data['description'] ); ?>
					</option>
					<?php endforeach; ?>
				</select>
		
				<select name="asrfwoo_shipping_condition[<?php echo esc_attr( $group_id ); ?>][<?php echo esc_attr( $condition_id ); ?>][condition-operator]" class="condition-operator">
					<?php foreach ( $available_operators as $operator_key => $operator_label ) : ?>
						<option value="<?php echo esc_attr( $operator_key ); ?>" <?php selected( $condition['operator'], $operator_key ); ?>>
							<?php echo esc_html( $operator_label ); ?>
						</option>
					<?php endforeach; ?>
				</select>
		
				<?php
				if ( $input_type && $input_type === 'select' ) :
					?>
					<select name="asrfwoo_shipping_condition[<?php echo esc_attr( $group_id ); ?>][<?php echo esc_attr( $condition_id ); ?>][condition-value]" class="condition-value">
						<?php foreach ( $condition_types[ $condition['type'] ]['options'] as $key => $label ) : ?>
							<option value="<?php echo esc_attr( $key ); ?>" <?php selected( $condition['value'], $key ); ?>>
								<?php echo esc_html( $label ); ?>
							</option>
						<?php endforeach; ?>
					</select>
				<?php elseif ( $input_type && $input_type === 'number' ) : ?>
					<input type="number" name="asrfwoo_shipping_condition[<?php echo esc_attr( $group_id ); ?>][<?php echo esc_attr( $condition_id ); ?>][condition-value]"
					class="condition-value" value="<?php echo esc_attr( $condition['value'] ); ?>" min="0" step="<?php echo esc_attr( $step ); ?>" placeholder="<?php echo esc_attr( $placeholder_for_value_field ); ?>">
				<?php endif; ?>
			
			
				<button type="button" disabled class="remove-condition components-button is-tertiary"><?php esc_html_e( '×', 'advanced-shipping-rules-for-woocommerce' ); ?></button>
			
				<?php
				// Hidden field, tell us if it is a new condition
				if ( $condition_id === '%%CONDITION_ID_PLACEHOLDER%%' ) :
					?>
					<input type="hidden" name="asrfwoo_shipping_condition[<?php echo esc_attr( $group_id ); ?>][<?php echo esc_attr( $condition_id ); ?>][condition-is-new]" value="1">
				<?php endif; ?>
			</div>
		
			<?php
			return ob_get_clean();
		}

		/**
		 * Generates the HTML output for a shipping group.
		 *
		 * @param array|null $group The shipping group data. Default is null.
		 * @return string The generated HTML for the shipping group.
		 */
		public static function generate_html_shipping_group( $group = null ): string {
			ob_start();

			// Sanitize Group ID
			$group_id = $group ? sanitize_text_field( $group->ID ) : '%%GROUP_ID_PLACEHOLDER%%';

			// Group cost (stored on the group post, not on individual conditions)
			$raw_group_cost    = $group ? get_post_meta( $group_id, '_group_cost', true ) : '';
			$group_cost_display = $raw_group_cost !== '' ? number_format( (float) $raw_group_cost, 2, '.', '' ) : '';
			// Translators: %s is the currency symbol set in WooCommerce settings.
			$group_cost_placeholder = sprintf( __( 'Cost (%s)', 'advanced-shipping-rules-for-woocommerce' ), esc_html( get_woocommerce_currency_symbol() ) );

			?>
			<div class="wcasr-shipping-group" data-group-id="<?php echo esc_attr( $group_id ); ?>">

				<div class="wcasr-shipping-group__header">
					<button type="button" disabled class="wcasr-shipping-remove-group components-button is-destructive" data-group-id="<?php echo esc_attr( $group_id ); ?>"><?php esc_html_e( '× Remove Group', 'advanced-shipping-rules-for-woocommerce' ); ?></button>
				</div>

				<div class="wcasr-conditions-container">
					<?php
					// Retrieve and sanitize conditions
					$conditions   = $group ? maybe_unserialize( get_post_meta( $group_id, '_group_conditions', true ) ) : array();
					$allowed_html = array(
						'div'    => array( 'class' => array() ),
						'select' => array(
							'name'  => array(),
							'class' => array(),
						),
						'option' => array(
							'value'    => array(),
							'selected' => array(),
							'disabled' => array(),
						),
						'input'  => array(
							'type'        => array(),
							'name'        => array(),
							'class'       => array(),
							'value'       => array(),
							'min'         => array(),
							'step'        => array(),
							'placeholder' => array(),
						),
						'button' => array(
							'type'     => array(),
							'class'    => array(),
							'disabled' => array(),
						),
						'!--'    => array(), // Allows HTML comments
					);
					if ( is_array( $conditions ) && ! empty( $conditions ) ) {
						foreach ( $conditions as $condition_id ) {
							echo wp_kses( self::generate_html_shipping_condition( sanitize_text_field( $condition_id ), $group_id ), $allowed_html );
						}
					}
					?>
				</div>

				<div class="wcasr-shipping-group__footer">
					<button type="button" disabled class="wcasr-shipping-add-condition components-button is-secondary" data-group-id="<?php echo esc_attr( $group_id ); ?>"><?php esc_html_e( '+ Add Condition', 'advanced-shipping-rules-for-woocommerce' ); ?></button>
					<div class="wcasr-group-cost-wrapper">
						<div class="wcasr-group-cost-label"><?php esc_html_e( 'Shipping Cost', 'advanced-shipping-rules-for-woocommerce' ); ?></div>
						<input type="number"
							name="asrfwoo_shipping_group_cost[<?php echo esc_attr( $group_id ); ?>]"
							class="group-cost"
							value="<?php echo esc_attr( $group_cost_display ); ?>"
							min="0" step="0.01"
							placeholder="<?php echo esc_attr( $group_cost_placeholder ); ?>">
					</div>
				</div>

				<?php if ( $group_id !== '%%GROUP_ID_PLACEHOLDER%%' ) : ?>
					<input type="hidden" name="asrfwoo_shipping_group_order[]" value="existing_<?php echo esc_attr( $group_id ); ?>">
				<?php else : ?>
					<input type="hidden" name="asrfwoo_shipping_group_order[]" value="new_<?php echo esc_attr( $group_id ); ?>">
				<?php endif; ?>
			</div>
			<?php
			return ob_get_clean();
		}

		/**
		 * Generates the HTML output for a shipping separator labeled "OR".
		 *
		 * @return string The generated HTML for the shipping separator.
		 */
		public static function generate_html_shipping_separator_or(): string {
			return '<div class="wcasr-shipping-separator-or">' . esc_html__( 'or', 'advanced-shipping-rules-for-woocommerce' ) . '</div>';
		}
	}
}