<?php
/**
 * Email handler.
 *
 * @package AfriDirect_Payment
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Email handler class.
 */
class AfriDirect_Payment_Email_Handler {

	/**
	 * Plugin instance.
	 *
	 * @var AfriDirect_Payment_Email_Handler
	 */
	private static $instance = null;

	/**
	 * Get plugin instance.
	 *
	 * @return AfriDirect_Payment_Email_Handler
	 */
	public static function instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor.
	 */
	private function __construct() {
		$this->init_hooks();
	}

	/**
	 * Initialize hooks.
	 */
	private function init_hooks() {
		// WooCommerce order emails.
		if ( class_exists( 'WooCommerce' ) ) {
			add_action( 'woocommerce_order_status_adp-pending', array( $this, 'send_pending_email' ), 10, 2 );
			add_action( 'woocommerce_order_status_adp-proof', array( $this, 'send_proof_received_email' ), 10, 2 );
			add_action( 'woocommerce_order_status_adp-approved', array( $this, 'send_approved_email' ), 10, 2 );
			add_action( 'woocommerce_order_status_adp-rejected', array( $this, 'send_rejected_email' ), 10, 2 );
			add_action( 'woocommerce_order_status_adp-expired', array( $this, 'send_expired_email' ), 10, 2 );
			add_filter( 'woocommerce_email_classes', array( $this, 'register_email_classes' ) );
		}

		// Standalone payment emails.
		add_action( 'afridirect_payment_approved', array( $this, 'send_standalone_approved_email' ), 10, 1 );
		add_action( 'afridirect_payment_rejected', array( $this, 'send_standalone_rejected_email' ), 10, 2 );
		add_action( 'afridirect_payment_proof_uploaded', array( $this, 'send_standalone_proof_received_email' ), 10, 1 );
	}

	/**
	 * Send pending payment email.
	 *
	 * @param int      $order_id Order ID.
	 * @param WC_Order $order Order object.
	 */
	public function send_pending_email( $order_id, $order ) {
		if ( 'afridirect_payment' !== $order->get_payment_method() ) {
			return;
		}

		$mailer = WC()->mailer();
		$emails = $mailer->get_emails();

		if ( isset( $emails['afridirect_pending_payment'] ) ) {
			$emails['afridirect_pending_payment']->trigger( $order_id, $order );
		}
	}

	/**
	 * Send proof received email.
	 *
	 * @param int      $order_id Order ID.
	 * @param WC_Order $order Order object.
	 */
	public function send_proof_received_email( $order_id, $order ) {
		if ( 'afridirect_payment' !== $order->get_payment_method() ) {
			return;
		}

		$mailer = WC()->mailer();
		$emails = $mailer->get_emails();

		if ( isset( $emails['afridirect_proof_received'] ) ) {
			$emails['afridirect_proof_received']->trigger( $order_id, $order );
		}
	}

	/**
	 * Send approved email.
	 *
	 * @param int      $order_id Order ID.
	 * @param WC_Order $order Order object.
	 */
	public function send_approved_email( $order_id, $order ) {
		if ( 'afridirect_payment' !== $order->get_payment_method() ) {
			return;
		}

		$mailer = WC()->mailer();
		$emails = $mailer->get_emails();

		if ( isset( $emails['afridirect_approved'] ) ) {
			$emails['afridirect_approved']->trigger( $order_id, $order );
		}
	}

	/**
	 * Send rejected email.
	 *
	 * @param int      $order_id Order ID.
	 * @param WC_Order $order Order object.
	 */
	public function send_rejected_email( $order_id, $order ) {
		if ( 'afridirect_payment' !== $order->get_payment_method() ) {
			return;
		}

		$mailer = WC()->mailer();
		$emails = $mailer->get_emails();

		if ( isset( $emails['afridirect_rejected'] ) ) {
			$emails['afridirect_rejected']->trigger( $order_id, $order );
		}
	}

	/**
	 * Send expired email.
	 *
	 * @param int      $order_id Order ID.
	 * @param WC_Order $order Order object.
	 */
	public function send_expired_email( $order_id, $order ) {
		if ( 'afridirect_payment' !== $order->get_payment_method() ) {
			return;
		}

		$mailer = WC()->mailer();
		$emails = $mailer->get_emails();

		if ( isset( $emails['afridirect_expired'] ) ) {
			$emails['afridirect_expired']->trigger( $order_id, $order );
		}
	}

	/**
	 * Register email classes.
	 *
	 * @param array $emails Existing email classes.
	 * @return array
	 */
	public function register_email_classes( $emails ) {
		// WooCommerce isn't ready yet.
		if ( ! class_exists( 'WC_Email' ) ) {
			return $emails;
		}

		// Load our email classes only when WooCommerce email base is available.
		if ( ! class_exists( 'AfriDirect_Payment_Email_Pending' ) ) {
			require AFRIDIRECT_PAYMENT_PLUGIN_DIR . 'includes/class-emails.php';
		}

		// If the file was included but classes are still missing, fail gracefully.
		if ( ! class_exists( 'AfriDirect_Payment_Email_Pending' ) ) {
			return $emails;
		}

		$pending_email = new AfriDirect_Payment_Email_Pending();
		$proof_received_email = new AfriDirect_Payment_Email_Proof_Received();
		$approved_email = new AfriDirect_Payment_Email_Approved();
		$rejected_email = new AfriDirect_Payment_Email_Rejected();
		$expired_email = new AfriDirect_Payment_Email_Expired();
		
		$emails[ $pending_email->id ] = $pending_email;
		$emails[ $proof_received_email->id ] = $proof_received_email;
		$emails[ $approved_email->id ] = $approved_email;
		$emails[ $rejected_email->id ] = $rejected_email;
		$emails[ $expired_email->id ] = $expired_email;
		
		return $emails;
	}

	/**
	 * Send approved email for standalone payment.
	 *
	 * @param int $payment_id Payment ID.
	 */
	public function send_standalone_approved_email( $payment_id ) {
		$payment = AfriDirect_Payments::get_payment( $payment_id );
		if ( ! $payment || empty( $payment['payer_email'] ) ) {
			return;
		}

		/* translators: %s: Payment reference number */
		$subject = sprintf( __( 'Payment Approved - %s', 'afridirect-payment' ), $payment['reference'] );
		$message = $this->get_standalone_approved_email_content( $payment );

		wp_mail(
			$payment['payer_email'],
			$subject,
			$message,
			array(
				'Content-Type: text/html; charset=UTF-8',
				'From: ' . get_bloginfo( 'name' ) . ' <' . get_option( 'admin_email' ) . '>',
			)
		);
	}

	/**
	 * Send rejected email for standalone payment.
	 *
	 * @param int    $payment_id Payment ID.
	 * @param string $reason Rejection reason.
	 */
	public function send_standalone_rejected_email( $payment_id, $reason = '' ) {
		$payment = AfriDirect_Payments::get_payment( $payment_id );
		if ( ! $payment || empty( $payment['payer_email'] ) ) {
			return;
		}

		/* translators: %s: Payment reference number */
		$subject = sprintf( __( 'Payment Rejected - %s', 'afridirect-payment' ), $payment['reference'] );
		$message = $this->get_standalone_rejected_email_content( $payment, $reason );

		wp_mail(
			$payment['payer_email'],
			$subject,
			$message,
			array(
				'Content-Type: text/html; charset=UTF-8',
				'From: ' . get_bloginfo( 'name' ) . ' <' . get_option( 'admin_email' ) . '>',
			)
		);
	}

	/**
	 * Send proof received email for standalone payment.
	 *
	 * @param int $payment_id Payment ID.
	 */
	public function send_standalone_proof_received_email( $payment_id ) {
		// This can notify admin that proof was uploaded.
		// For now, we'll just log it or send admin notification if needed.
		// Customer notification happens on approval/rejection.
	}

	/**
	 * Get approved email content for standalone payment.
	 *
	 * @param array $payment Payment data.
	 * @return string
	 */
	private function get_standalone_approved_email_content( $payment ) {
		$receipt_number = get_post_meta( $payment['id'], '_afridirect_receipt_no', true );
		
		ob_start();
		?>
		<!DOCTYPE html>
		<html>
		<head>
			<meta charset="UTF-8">
			<style>
				body { font-family: Arial, sans-serif; line-height: 1.6; color: #333; }
				.container { max-width: 600px; margin: 0 auto; padding: 20px; }
				.header { background: #28a745; color: #fff; padding: 20px; text-align: center; border-radius: 5px 5px 0 0; }
				.content { background: #f9f9f9; padding: 20px; border: 1px solid #ddd; }
				.footer { text-align: center; padding: 20px; color: #666; font-size: 12px; }
				.payment-details { background: #fff; padding: 15px; margin: 15px 0; border-radius: 5px; }
				.payment-details table { width: 100%; }
				.payment-details td { padding: 8px 0; }
				.payment-details td:first-child { font-weight: bold; width: 40%; }
			</style>
		</head>
		<body>
			<div class="container">
				<div class="header">
					<h1><?php esc_html_e( 'Payment Approved', 'afridirect-payment' ); ?></h1>
				</div>
				<div class="content">
					<p><?php esc_html_e( 'Dear', 'afridirect-payment' ); ?> <?php echo esc_html( $payment['payer_name'] ?: __( 'Customer', 'afridirect-payment' ) ); ?>,</p>
					
					<p><?php esc_html_e( 'Your payment has been approved. Thank you!', 'afridirect-payment' ); ?></p>
					
					<div class="payment-details">
						<h3><?php esc_html_e( 'Payment Details', 'afridirect-payment' ); ?></h3>
						<table>
							<tr>
								<td><?php esc_html_e( 'Reference:', 'afridirect-payment' ); ?></td>
								<td><?php echo esc_html( $payment['reference'] ); ?></td>
							</tr>
							<?php if ( $receipt_number ) : ?>
								<tr>
									<td><?php esc_html_e( 'Receipt Number:', 'afridirect-payment' ); ?></td>
									<td><?php echo esc_html( $receipt_number ); ?></td>
								</tr>
							<?php endif; ?>
							<tr>
								<td><?php esc_html_e( 'Amount:', 'afridirect-payment' ); ?></td>
								<td><?php echo esc_html( number_format( $payment['amount'], 2 ) . ' ' . strtoupper( $payment['currency'] ) ); ?></td>
							</tr>
							<tr>
								<td><?php esc_html_e( 'Payment Method:', 'afridirect-payment' ); ?></td>
								<td><?php echo esc_html( $payment['method_label'] ); ?></td>
							</tr>
						</table>
					</div>
					
					<p><?php esc_html_e( 'Best regards,', 'afridirect-payment' ); ?><br>
					<?php echo esc_html( get_bloginfo( 'name' ) ); ?></p>
				</div>
				<div class="footer">
					<p><?php echo esc_html( get_bloginfo( 'name' ) ); ?> - <?php echo esc_url( home_url() ); ?></p>
				</div>
			</div>
		</body>
		</html>
		<?php
		return ob_get_clean();
	}

	/**
	 * Get rejected email content for standalone payment.
	 *
	 * @param array  $payment Payment data.
	 * @param string $reason Rejection reason.
	 * @return string
	 */
	private function get_standalone_rejected_email_content( $payment, $reason = '' ) {
		ob_start();
		?>
		<!DOCTYPE html>
		<html>
		<head>
			<meta charset="UTF-8">
			<style>
				body { font-family: Arial, sans-serif; line-height: 1.6; color: #333; }
				.container { max-width: 600px; margin: 0 auto; padding: 20px; }
				.header { background: #dc3545; color: #fff; padding: 20px; text-align: center; border-radius: 5px 5px 0 0; }
				.content { background: #f9f9f9; padding: 20px; border: 1px solid #ddd; }
				.footer { text-align: center; padding: 20px; color: #666; font-size: 12px; }
				.payment-details { background: #fff; padding: 15px; margin: 15px 0; border-radius: 5px; }
				.rejection-reason { background: #fff3cd; border-left: 4px solid #ffc107; padding: 15px; margin: 15px 0; }
				.payment-details table { width: 100%; }
				.payment-details td { padding: 8px 0; }
				.payment-details td:first-child { font-weight: bold; width: 40%; }
			</style>
		</head>
		<body>
			<div class="container">
				<div class="header">
					<h1><?php esc_html_e( 'Payment Rejected', 'afridirect-payment' ); ?></h1>
				</div>
				<div class="content">
					<p><?php esc_html_e( 'Dear', 'afridirect-payment' ); ?> <?php echo esc_html( $payment['payer_name'] ?: __( 'Customer', 'afridirect-payment' ) ); ?>,</p>
					
					<p><?php esc_html_e( 'We regret to inform you that your payment proof has been rejected.', 'afridirect-payment' ); ?></p>
					
					<?php if ( $reason ) : ?>
						<div class="rejection-reason">
							<h3><?php esc_html_e( 'Rejection Reason:', 'afridirect-payment' ); ?></h3>
							<p><?php echo esc_html( $reason ); ?></p>
						</div>
					<?php endif; ?>
					
					<div class="payment-details">
						<h3><?php esc_html_e( 'Payment Details', 'afridirect-payment' ); ?></h3>
						<table>
							<tr>
								<td><?php esc_html_e( 'Reference:', 'afridirect-payment' ); ?></td>
								<td><?php echo esc_html( $payment['reference'] ); ?></td>
							</tr>
							<tr>
								<td><?php esc_html_e( 'Amount:', 'afridirect-payment' ); ?></td>
								<td><?php echo esc_html( number_format( $payment['amount'], 2 ) . ' ' . strtoupper( $payment['currency'] ) ); ?></td>
							</tr>
							<tr>
								<td><?php esc_html_e( 'Payment Method:', 'afridirect-payment' ); ?></td>
								<td><?php echo esc_html( $payment['method_label'] ); ?></td>
							</tr>
						</table>
					</div>
					
					<p><?php esc_html_e( 'Please review the rejection reason above and upload a new proof if needed.', 'afridirect-payment' ); ?></p>
					
					<p><?php esc_html_e( 'Best regards,', 'afridirect-payment' ); ?><br>
					<?php echo esc_html( get_bloginfo( 'name' ) ); ?></p>
				</div>
				<div class="footer">
					<p><?php echo esc_html( get_bloginfo( 'name' ) ); ?> - <?php echo esc_url( home_url() ); ?></p>
				</div>
			</div>
		</body>
		</html>
		<?php
		return ob_get_clean();
	}
}