<?php
/**
 * Payment methods library.
 *
 * @package AfriDirect_Payment
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Payment methods class.
 */
class AfriDirect_Payment_Methods {

	/**
	 * Get all payment methods.
	 *
	 * @return array
	 */
	public static function get_all() {
		$methods = get_option( 'afridirect_payment_methods', array() );
		return is_array( $methods ) ? $methods : array();
	}

	/**
	 * Get a single payment method.
	 *
	 * @param string $method_id Method ID.
	 * @return array|false
	 */
	public static function get( $method_id ) {
		$methods = self::get_all();
		return isset( $methods[ $method_id ] ) ? $methods[ $method_id ] : false;
	}

	/**
	 * Save payment method.
	 *
	 * @param array $method Method data.
	 * @return bool
	 */
	public static function save( $method ) {
		// Auto-generate ID if missing.
		if ( empty( $method['id'] ) ) {
			$label = isset( $method['label'] ) ? $method['label'] : '';
			if ( empty( $label ) ) {
				return false;
			}
			$method['id'] = sanitize_key( sanitize_title( $label ) . '-' . time() );
		}

		$methods = self::get_all();
		$methods[ $method['id'] ] = self::sanitize_method( $method );
		return update_option( 'afridirect_payment_methods', $methods );
	}

	/**
	 * Delete payment method.
	 *
	 * @param string $method_id Method ID.
	 * @return bool
	 */
	public static function delete( $method_id ) {
		$methods = self::get_all();
		if ( ! isset( $methods[ $method_id ] ) ) {
			return false;
		}

		unset( $methods[ $method_id ] );
		return update_option( 'afridirect_payment_methods', $methods );
	}

	/**
	 * Sanitize method data.
	 *
	 * @param array $method Method data.
	 * @return array
	 */
	private static function sanitize_method( $method ) {
		$sanitized = array(
			'id'          => sanitize_key( $method['id'] ),
			'label'       => sanitize_text_field( $method['label'] ),
			'type'        => sanitize_key( $method['type'] ),
			'fields'      => array(),
			'instructions' => wp_kses_post( $method['instructions'] ?? '' ),
			'qr_attachment_id' => isset( $method['qr_attachment_id'] ) ? absint( $method['qr_attachment_id'] ) : 0,
			'copy_fields' => isset( $method['copy_fields'] ) && is_array( $method['copy_fields'] ) ? array_map( 'sanitize_key', $method['copy_fields'] ) : array(),
		);

		// Sanitize fields based on type.
		if ( isset( $method['fields'] ) && is_array( $method['fields'] ) ) {
			$sanitized['fields'] = self::sanitize_fields( $method['type'], $method['fields'] );
		}

		return $sanitized;
	}

	/**
	 * Sanitize fields based on type.
	 *
	 * @param string $type Method type.
	 * @param array  $fields Fields data.
	 * @return array
	 */
	private static function sanitize_fields( $type, $fields ) {
		$sanitized = array();

		switch ( $type ) {
			case 'bank':
				$sanitized = array(
					'bank_name'     => sanitize_text_field( $fields['bank_name'] ?? '' ),
					'account_name' => sanitize_text_field( $fields['account_name'] ?? '' ),
					'account_number' => sanitize_text_field( $fields['account_number'] ?? '' ),
					'sort_code'    => sanitize_text_field( $fields['sort_code'] ?? '' ),
					'iban'         => sanitize_text_field( $fields['iban'] ?? '' ),
					'swift'        => sanitize_text_field( $fields['swift'] ?? '' ),
					'routing_number' => sanitize_text_field( $fields['routing_number'] ?? '' ),
				);
				break;

			case 'paypal':
				$sanitized = array(
					'email' => sanitize_email( $fields['email'] ?? '' ),
				);
				break;

			case 'zelle':
				$sanitized = array(
					'email' => sanitize_email( $fields['email'] ?? '' ),
					'phone' => sanitize_text_field( $fields['phone'] ?? '' ),
				);
				break;

			case 'crypto':
				$sanitized = array(
					'wallet_address' => sanitize_text_field( $fields['wallet_address'] ?? '' ),
					'network'        => sanitize_text_field( $fields['network'] ?? '' ),
					'currency'       => sanitize_text_field( $fields['currency'] ?? '' ),
				);
				break;

			case 'custom':
				// Custom fields as key-value pairs.
				$sanitized = array();
				if ( is_array( $fields ) ) {
					foreach ( $fields as $key => $value ) {
						$sanitized[ sanitize_key( $key ) ] = sanitize_text_field( $value );
					}
				}
				break;
		}

		return $sanitized;
	}

	/**
	 * Get method types.
	 *
	 * @return array
	 */
	public static function get_types() {
		return array(
			'bank'    => __( 'Bank Transfer', 'afridirect-payment' ),
			'paypal'  => __( 'PayPal', 'afridirect-payment' ),
			'zelle'   => __( 'Zelle', 'afridirect-payment' ),
			'crypto'  => __( 'Cryptocurrency', 'afridirect-payment' ),
			'custom'  => __( 'Custom', 'afridirect-payment' ),
		);
	}

	/**
	 * Get field labels for a type.
	 *
	 * @param string $type Method type.
	 * @return array
	 */
	public static function get_field_labels( $type ) {
		$labels = array(
			'bank' => array(
				'bank_name'      => __( 'Bank Name', 'afridirect-payment' ),
				'account_name'   => __( 'Account Name', 'afridirect-payment' ),
				'account_number' => __( 'Account Number', 'afridirect-payment' ),
				'sort_code'      => __( 'Sort Code', 'afridirect-payment' ),
				'iban'           => __( 'IBAN', 'afridirect-payment' ),
				'swift'          => __( 'SWIFT/BIC', 'afridirect-payment' ),
				'routing_number' => __( 'Routing Number', 'afridirect-payment' ),
			),
			'paypal' => array(
				'email' => __( 'PayPal Email', 'afridirect-payment' ),
			),
			'zelle' => array(
				'email' => __( 'Email', 'afridirect-payment' ),
				'phone' => __( 'Phone Number', 'afridirect-payment' ),
			),
			'crypto' => array(
				'wallet_address' => __( 'Wallet Address', 'afridirect-payment' ),
				'network'        => __( 'Network', 'afridirect-payment' ),
				'currency'       => __( 'Currency', 'afridirect-payment' ),
			),
		);

		return $labels[ $type ] ?? array();
	}
}