<?php
/**
 * Booking emails for the business and the customer.
 *
 * @package Rentbaik
 */

namespace Rentbaik\Notifications;

use Rentbaik\Booking\BookingRepository;
use Rentbaik\Customers\CustomerRepository;
use Rentbaik\Payments\PaymentRepository;
use Rentbaik\Settings;

defined( 'ABSPATH' ) || exit;

/**
 * Sends plain, readable HTML emails through wp_mail().
 */
final class Emails {

	/**
	 * When true, no email is sent (used while creating sample data).
	 *
	 * @var bool
	 */
	private static $muted = false;

	/**
	 * Stop or resume sending emails for the rest of this request.
	 *
	 * @param bool $muted True to stop sending.
	 * @return void
	 */
	public static function mute( bool $muted ): void {
		self::$muted = $muted;
	}

	/**
	 * New booking: tell the business, and tell the customer it was received (or confirmed).
	 *
	 * @param int $booking_id Booking ID.
	 * @return void
	 */
	public static function booking_created( int $booking_id ): void {
		$booking = BookingRepository::find( $booking_id );
		if ( ! $booking ) {
			return;
		}
		if ( self::enabled( 'email_admin_new' ) ) {
			$recipients = array_filter( array_map( 'trim', explode( ',', (string) Settings::get( 'notifications', 'admin_recipients' ) ) ) );
			self::send(
				$recipients,
				/* translators: %s: booking number. */
				sprintf( __( 'New booking %s', 'rentbaik' ), $booking['booking_number'] ),
				__( 'A new booking was made.', 'rentbaik' ),
				$booking_id,
				admin_url( 'admin.php?page=rentbaik-bookings&action=view&booking=' . $booking_id )
			);
		}
		if ( 'confirmed' === $booking['status'] ) {
			self::to_customer( $booking_id, 'email_confirmed' );
		} else {
			self::to_customer( $booking_id, 'email_received' );
		}
	}

	/**
	 * Tell the business that a customer uploaded a payment proof.
	 *
	 * @param int $booking_id Booking ID.
	 * @return void
	 */
	public static function payment_proof( int $booking_id ): void {
		$booking = BookingRepository::find( $booking_id );
		if ( ! $booking ) {
			return;
		}
		$recipients = array_filter( array_map( 'trim', explode( ',', (string) Settings::get( 'notifications', 'admin_recipients' ) ) ) );
		self::send(
			$recipients,
			/* translators: %s: booking number. */
			sprintf( __( 'Payment proof for booking %s', 'rentbaik' ), $booking['booking_number'] ),
			__( 'The customer uploaded a payment proof. Check your account, then record the payment on the booking.', 'rentbaik' ),
			$booking_id,
			admin_url( 'admin.php?page=rentbaik-bookings&action=view&booking=' . $booking_id )
		);
	}

	/**
	 * Tell the business about a payment that needs attention.
	 *
	 * @param int    $booking_id Booking ID.
	 * @param string $message    What happened.
	 * @return void
	 */
	public static function payment_problem( int $booking_id, string $message ): void {
		$booking = BookingRepository::find( $booking_id );
		if ( ! $booking ) {
			return;
		}
		$recipients = array_filter( array_map( 'trim', explode( ',', (string) Settings::get( 'notifications', 'admin_recipients' ) ) ) );
		self::send(
			$recipients,
			/* translators: %s: booking number. */
			sprintf( __( 'Check the payment of booking %s', 'rentbaik' ), $booking['booking_number'] ),
			$message,
			$booking_id,
			admin_url( 'admin.php?page=rentbaik-bookings&action=view&booking=' . $booking_id )
		);
	}

	/**
	 * Status change emails to the customer.
	 *
	 * @param int    $booking_id Booking ID.
	 * @param string $status     New status.
	 * @return void
	 */
	public static function status_changed( int $booking_id, string $status ): void {
		if ( 'confirmed' === $status ) {
			self::to_customer( $booking_id, 'email_confirmed' );
		} elseif ( 'completed' === $status ) {
			self::to_customer( $booking_id, 'email_thanks' );
		} elseif ( 'cancelled' === $status ) {
			self::to_customer( $booking_id, 'cancelled' );
		}
	}

	/**
	 * Reminder before pick-up or return.
	 *
	 * @param int    $booking_id Booking ID.
	 * @param string $type       "pickup" or "return".
	 * @return bool Sent.
	 */
	public static function reminder( int $booking_id, string $type ): bool {
		return self::to_customer( $booking_id, 'return' === $type ? 'email_return' : 'email_pickup' );
	}

	/**
	 * Send one of the customer emails.
	 *
	 * @param int    $booking_id Booking ID.
	 * @param string $key        Setting key of the email (or "cancelled").
	 * @return bool
	 */
	private static function to_customer( int $booking_id, string $key ): bool {
		if ( 'cancelled' !== $key && ! self::enabled( $key ) ) {
			return false;
		}
		$booking  = BookingRepository::find( $booking_id );
		$customer = $booking ? CustomerRepository::find( (int) $booking['customer_id'] ) : null;
		if ( ! $customer || ! is_email( (string) $customer['email'] ) ) {
			return false;
		}

		$business = (string) Settings::get( 'general', 'business_name' );
		$texts    = array(
			'email_received'  => array(
				/* translators: 1: business name, 2: booking number. */
				sprintf( __( '%1$s: we received your booking %2$s', 'rentbaik' ), $business, $booking['booking_number'] ),
				__( 'Thank you! We received your booking and will confirm it soon.', 'rentbaik' ),
			),
			'email_confirmed' => array(
				/* translators: 1: business name, 2: booking number. */
				sprintf( __( '%1$s: booking %2$s confirmed', 'rentbaik' ), $business, $booking['booking_number'] ),
				__( 'Your booking is confirmed. See you at pick-up!', 'rentbaik' ),
			),
			'email_pickup'    => array(
				/* translators: %s: business name. */
				sprintf( __( '%s: reminder for your pick-up', 'rentbaik' ), $business ),
				__( 'This is a reminder that your rental starts soon.', 'rentbaik' ),
			),
			'email_return'    => array(
				/* translators: %s: business name. */
				sprintf( __( '%s: reminder to return the vehicle', 'rentbaik' ), $business ),
				__( 'This is a reminder that your rental ends soon. Please return the vehicle on time.', 'rentbaik' ),
			),
			'email_thanks'    => array(
				/* translators: %s: business name. */
				sprintf( __( 'Thank you for renting with %s', 'rentbaik' ), $business ),
				__( 'Thank you for renting with us. We hope to see you again!', 'rentbaik' ),
			),
			'cancelled'       => array(
				/* translators: 1: business name, 2: booking number. */
				sprintf( __( '%1$s: booking %2$s cancelled', 'rentbaik' ), $business, $booking['booking_number'] ),
				__( 'Your booking was cancelled. Contact us if you have questions.', 'rentbaik' ),
			),
		);
		if ( ! isset( $texts[ $key ] ) ) {
			return false;
		}

		return self::send( array( (string) $customer['email'] ), $texts[ $key ][0], $texts[ $key ][1], $booking_id );
	}

	/**
	 * Whether an email type is switched on.
	 *
	 * @param string $key Setting key.
	 * @return bool
	 */
	private static function enabled( string $key ): bool {
		return (bool) Settings::get( 'notifications', $key );
	}

	/**
	 * Build and send an email with the booking summary.
	 *
	 * @param string[] $to         Recipients.
	 * @param string   $subject    Subject.
	 * @param string   $intro      First paragraph.
	 * @param int      $booking_id Booking ID.
	 * @param string   $link       Optional link for staff.
	 * @return bool
	 */
	private static function send( array $to, string $subject, string $intro, int $booking_id, string $link = '' ): bool {
		$to = array_filter( $to, 'is_email' );
		if ( self::$muted || empty( $to ) ) {
			return false;
		}

		$summary = WhatsApp::summary( $booking_id );
		$body    = '<div style="font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:1.5;color:#1d2327;max-width:560px">';
		$body   .= '<p>' . esc_html( $intro ) . '</p>';
		$body   .= '<p style="background:#f6f7f7;border-radius:6px;padding:12px 14px">' . nl2br( esc_html( $summary ) ) . '</p>';

		$payments = (array) Settings::get( 'payments', 'methods' );
		$bank     = (string) Settings::get( 'payments', 'bank_details' );
		if ( '' === $link && ! empty( $payments ) ) {
			/* translators: %s: list of payment methods. */
			$body .= '<p>' . esc_html( sprintf( __( 'Payment options: %s', 'rentbaik' ), self::payment_methods_text() ) ) . '</p>';
		}
		if ( in_array( 'bank_transfer', $payments, true ) && '' !== $bank && '' === $link ) {
			$body .= '<p><strong>' . esc_html__( 'Bank transfer details', 'rentbaik' ) . '</strong><br>' . nl2br( esc_html( $bank ) ) . '</p>';
		}
		$instructions = (string) Settings::get( 'payments', 'instructions' );
		if ( '' !== $instructions && '' === $link ) {
			$body .= '<p>' . nl2br( esc_html( $instructions ) ) . '</p>';
		}
		if ( '' !== $link ) {
			$body .= '<p><a href="' . esc_url( $link ) . '">' . esc_html__( 'Open the booking', 'rentbaik' ) . '</a></p>';
		}
		$contact = array_filter(
			array(
				(string) Settings::get( 'general', 'business_name' ),
				(string) Settings::get( 'general', 'business_phone' ),
				(string) Settings::get( 'general', 'business_email' ),
			)
		);
		$body   .= '<p style="color:#50575e;font-size:13px">' . esc_html( implode( ' · ', $contact ) ) . '</p></div>';

		$headers   = array( 'Content-Type: text/html; charset=UTF-8' );
		$from      = (string) Settings::get( 'notifications', 'from_email' );
		$from_name = (string) Settings::get( 'notifications', 'from_name' );
		if ( is_email( $from ) ) {
			$headers[] = 'From: ' . wp_specialchars_decode( str_replace( array( "\r", "\n", '"' ), '', $from_name ), ENT_QUOTES ) . ' <' . $from . '>';
		}

		return (bool) wp_mail( $to, wp_specialchars_decode( $subject, ENT_QUOTES ), $body, $headers );
	}

	/**
	 * Enabled payment methods as readable text.
	 *
	 * @return string
	 */
	public static function payment_methods_text(): string {
		$labels  = PaymentRepository::method_labels();
		$methods = array_intersect_key( $labels, array_flip( (array) Settings::get( 'payments', 'methods' ) ) );
		return implode( ', ', $methods );
	}
}