<?php
/**
 * Tax Settings REST API Controller
 *
 * @package WooNooW
 */

namespace WooNooW\Api;

use WP_REST_Controller;
use WP_REST_Server;
use WP_REST_Request;
use WP_REST_Response;
use WP_Error;

class TaxController extends WP_REST_Controller {

	/**
	 * Register routes
	 */
	public function register_routes() {
		$namespace = 'woonoow/v1';

		// Get tax settings
		register_rest_route(
			$namespace,
			'/settings/tax',
			array(
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => array( $this, 'get_settings' ),
				'permission_callback' => array( $this, 'check_permission' ),
			)
		);

		// Toggle tax calculation
		register_rest_route(
			$namespace,
			'/settings/tax/toggle',
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => array( $this, 'toggle_tax' ),
				'permission_callback' => array( $this, 'check_permission' ),
				'args'                => array(
					'enabled' => array(
						'required'          => true,
						'type'              => 'boolean',
						'sanitize_callback' => 'rest_sanitize_boolean',
					),
				),
			)
		);

		// Get suggested tax rates based on selling locations
		register_rest_route(
			$namespace,
			'/settings/tax/suggested',
			array(
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => array( $this, 'get_suggested_rates' ),
				'permission_callback' => array( $this, 'check_permission' ),
			)
		);

		// Create tax rate
		register_rest_route(
			$namespace,
			'/settings/tax/rates',
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => array( $this, 'create_rate' ),
				'permission_callback' => array( $this, 'check_permission' ),
			)
		);

		// Update tax rate
		register_rest_route(
			$namespace,
			'/settings/tax/rates/(?P<id>\d+)',
			array(
				'methods'             => WP_REST_Server::EDITABLE,
				'callback'            => array( $this, 'update_rate' ),
				'permission_callback' => array( $this, 'check_permission' ),
			)
		);

		// Delete tax rate
		register_rest_route(
			$namespace,
			'/settings/tax/rates/(?P<id>\d+)',
			array(
				'methods'             => WP_REST_Server::DELETABLE,
				'callback'            => array( $this, 'delete_rate' ),
				'permission_callback' => array( $this, 'check_permission' ),
			)
		);
	}

	/**
	 * Check permission
	 */
	public function check_permission() {
		return current_user_can( 'manage_woocommerce' );
	}

	/**
	 * Get tax settings
	 */
	public function get_settings( WP_REST_Request $request ) {
		try {
			$settings = array(
				'calc_taxes'          => get_option( 'woocommerce_calc_taxes', 'no' ),
				'prices_include_tax'  => get_option( 'woocommerce_prices_include_tax', 'no' ),
				'tax_based_on'        => get_option( 'woocommerce_tax_based_on', 'shipping' ),
				'tax_display_shop'    => get_option( 'woocommerce_tax_display_shop', 'excl' ),
				'tax_display_cart'    => get_option( 'woocommerce_tax_display_cart', 'excl' ),
				'standard_rates'      => $this->get_tax_rates( 'standard' ),
				'reduced_rates'       => $this->get_tax_rates( 'reduced-rate' ),
				'zero_rates'          => $this->get_tax_rates( 'zero-rate' ),
			);

			return new WP_REST_Response( $settings, 200 );
		} catch ( \Exception $e ) {
			return new WP_REST_Response(
				array(
					'error'   => 'fetch_failed',
					'message' => $e->getMessage(),
				),
				500
			);
		}
	}

	/**
	 * Toggle tax calculation
	 */
	public function toggle_tax( WP_REST_Request $request ) {
		try {
			$enabled = $request->get_param( 'enabled' );
			$value   = $enabled ? 'yes' : 'no';

			update_option( 'woocommerce_calc_taxes', $value );

			// Clear WooCommerce cache
			\WC_Cache_Helper::invalidate_cache_group( 'taxes' );
			\WC_Cache_Helper::get_transient_version( 'shipping', true );

			return new WP_REST_Response(
				array(
					'success' => true,
					'enabled' => $enabled,
					'message' => $enabled 
						? __( 'Tax calculation enabled', 'woonoow' )
						: __( 'Tax calculation disabled', 'woonoow' ),
				),
				200
			);
		} catch ( \Exception $e ) {
			return new WP_REST_Response(
				array(
					'error'   => 'update_failed',
					'message' => $e->getMessage(),
				),
				500
			);
		}
	}

	/**
	 * Get tax rates for a specific class
	 */
	private function get_tax_rates( $tax_class ) {
		global $wpdb;

		// For 'standard' class, match both empty string and 'standard'
		if ( $tax_class === 'standard' ) {
			$rates = $wpdb->get_results(
				"SELECT * FROM {$wpdb->prefix}woocommerce_tax_rates 
				WHERE tax_rate_class = '' OR tax_rate_class = 'standard'
				ORDER BY tax_rate_order ASC"
			);
		} else {
			$rates = $wpdb->get_results(
				$wpdb->prepare(
					"SELECT * FROM {$wpdb->prefix}woocommerce_tax_rates 
					WHERE tax_rate_class = %s 
					ORDER BY tax_rate_order ASC",
					$tax_class
				)
			);
		}

		$formatted_rates = array();

		foreach ( $rates as $rate ) {
			$formatted_rates[] = array(
				'id'       => $rate->tax_rate_id,
				'country'  => $rate->tax_rate_country,
				'state'    => $rate->tax_rate_state,
				'rate'     => $rate->tax_rate,
				'name'     => $rate->tax_rate_name,
				'priority' => $rate->tax_rate_priority,
				'compound' => $rate->tax_rate_compound,
				'shipping' => $rate->tax_rate_shipping,
			);
		}

		return $formatted_rates;
	}

	/**
	 * Get suggested tax rates based on WooCommerce selling locations
	 */
	public function get_suggested_rates( WP_REST_Request $request ) {
		try {
			// Predefined tax rates by country
			$predefined_rates = array(
				'ID' => array( 'country' => 'Indonesia', 'rate' => 11, 'name' => 'PPN (VAT)' ),
				'MY' => array( 'country' => 'Malaysia', 'rate' => 6, 'name' => 'SST' ),
				'SG' => array( 'country' => 'Singapore', 'rate' => 9, 'name' => 'GST' ),
				'TH' => array( 'country' => 'Thailand', 'rate' => 7, 'name' => 'VAT' ),
				'PH' => array( 'country' => 'Philippines', 'rate' => 12, 'name' => 'VAT' ),
				'VN' => array( 'country' => 'Vietnam', 'rate' => 10, 'name' => 'VAT' ),
				'AU' => array( 'country' => 'Australia', 'rate' => 10, 'name' => 'GST' ),
				'NZ' => array( 'country' => 'New Zealand', 'rate' => 15, 'name' => 'GST' ),
				'GB' => array( 'country' => 'United Kingdom', 'rate' => 20, 'name' => 'VAT' ),
				'DE' => array( 'country' => 'Germany', 'rate' => 19, 'name' => 'VAT' ),
				'FR' => array( 'country' => 'France', 'rate' => 20, 'name' => 'VAT' ),
				'IT' => array( 'country' => 'Italy', 'rate' => 22, 'name' => 'VAT' ),
				'ES' => array( 'country' => 'Spain', 'rate' => 21, 'name' => 'VAT' ),
				'CA' => array( 'country' => 'Canada', 'rate' => 5, 'name' => 'GST' ),
			);

			// Get WooCommerce selling locations
			$selling_locations = get_option( 'woocommerce_allowed_countries', 'all' );
			$suggested = array();

			if ( $selling_locations === 'specific' ) {
				// User selected specific countries
				$countries = get_option( 'woocommerce_specific_allowed_countries', array() );
				
				foreach ( $countries as $country_code ) {
					if ( isset( $predefined_rates[ $country_code ] ) ) {
						$suggested[] = array_merge(
							array( 'code' => $country_code ),
							$predefined_rates[ $country_code ]
						);
					}
				}
			} else {
				// Sell to all countries - suggest store base country
				$store_country = get_option( 'woocommerce_default_country', '' );
				$country_code = substr( $store_country, 0, 2 ); // Extract country code (e.g., 'ID' from 'ID:JB')
				
				if ( isset( $predefined_rates[ $country_code ] ) ) {
					$suggested[] = array_merge(
						array( 'code' => $country_code ),
						$predefined_rates[ $country_code ]
					);
				}
			}

			return new WP_REST_Response(
				array(
					'suggested' => $suggested,
					'all_rates' => $predefined_rates,
				),
				200
			);
		} catch ( \Exception $e ) {
			return new WP_REST_Response(
				array(
					'error'   => 'fetch_failed',
					'message' => $e->getMessage(),
				),
				500
			);
		}
	}

	/**
	 * Create tax rate
	 */
	public function create_rate( WP_REST_Request $request ) {
		try {
			global $wpdb;

			$country   = $request->get_param( 'country' );
			$state     = $request->get_param( 'state' ) ?? '';
			$rate      = $request->get_param( 'rate' );
			$name      = $request->get_param( 'name' );
			$tax_class = $request->get_param( 'tax_class' ) ?? '';
			$priority  = $request->get_param( 'priority' ) ?? 1;
			$compound  = $request->get_param( 'compound' ) ?? 0;
			$shipping  = $request->get_param( 'shipping' ) ?? 1;

			$wpdb->insert(
				$wpdb->prefix . 'woocommerce_tax_rates',
				array(
					'tax_rate_country'  => $country,
					'tax_rate_state'    => $state,
					'tax_rate'          => $rate,
					'tax_rate_name'     => $name,
					'tax_rate_priority' => $priority,
					'tax_rate_compound' => $compound,
					'tax_rate_shipping' => $shipping,
					'tax_rate_order'    => 0,
					'tax_rate_class'    => $tax_class,
				),
				array( '%s', '%s', '%s', '%s', '%d', '%d', '%d', '%d', '%s' )
			);

			$rate_id = $wpdb->insert_id;

			// Clear cache
			\WC_Cache_Helper::invalidate_cache_group( 'taxes' );

			return new WP_REST_Response(
				array(
					'success' => true,
					'id'      => $rate_id,
					'message' => __( 'Tax rate created', 'woonoow' ),
				),
				201
			);
		} catch ( \Exception $e ) {
			return new WP_REST_Response(
				array(
					'error'   => 'create_failed',
					'message' => $e->getMessage(),
				),
				500
			);
		}
	}

	/**
	 * Update tax rate
	 */
	public function update_rate( WP_REST_Request $request ) {
		try {
			global $wpdb;

			$rate_id   = $request->get_param( 'id' );
			$country   = $request->get_param( 'country' );
			$state     = $request->get_param( 'state' ) ?? '';
			$rate      = $request->get_param( 'rate' );
			$name      = $request->get_param( 'name' );
			$tax_class = $request->get_param( 'tax_class' ) ?? '';
			$priority  = $request->get_param( 'priority' ) ?? 1;
			$compound  = $request->get_param( 'compound' ) ?? 0;
			$shipping  = $request->get_param( 'shipping' ) ?? 1;

			$wpdb->update(
				$wpdb->prefix . 'woocommerce_tax_rates',
				array(
					'tax_rate_country'  => $country,
					'tax_rate_state'    => $state,
					'tax_rate'          => $rate,
					'tax_rate_name'     => $name,
					'tax_rate_priority' => $priority,
					'tax_rate_compound' => $compound,
					'tax_rate_shipping' => $shipping,
					'tax_rate_class'    => $tax_class,
				),
				array( 'tax_rate_id' => $rate_id ),
				array( '%s', '%s', '%s', '%s', '%d', '%d', '%d', '%s' ),
				array( '%d' )
			);

			// Clear cache
			\WC_Cache_Helper::invalidate_cache_group( 'taxes' );

			return new WP_REST_Response(
				array(
					'success' => true,
					'message' => __( 'Tax rate updated', 'woonoow' ),
				),
				200
			);
		} catch ( \Exception $e ) {
			return new WP_REST_Response(
				array(
					'error'   => 'update_failed',
					'message' => $e->getMessage(),
				),
				500
			);
		}
	}

	/**
	 * Delete tax rate
	 */
	public function delete_rate( WP_REST_Request $request ) {
		try {
			global $wpdb;

			$rate_id = $request->get_param( 'id' );

			$wpdb->delete(
				$wpdb->prefix . 'woocommerce_tax_rates',
				array( 'tax_rate_id' => $rate_id ),
				array( '%d' )
			);

			// Also delete rate locations
			$wpdb->delete(
				$wpdb->prefix . 'woocommerce_tax_rate_locations',
				array( 'tax_rate_id' => $rate_id ),
				array( '%d' )
			);

			// Clear cache
			\WC_Cache_Helper::invalidate_cache_group( 'taxes' );

			return new WP_REST_Response(
				array(
					'success' => true,
					'message' => __( 'Tax rate deleted', 'woonoow' ),
				),
				200
			);
		} catch ( \Exception $e ) {
			return new WP_REST_Response(
				array(
					'error'   => 'delete_failed',
					'message' => $e->getMessage(),
				),
				500
			);
		}
	}
}