import nodemailer from 'nodemailer';

interface EmailOptions {
	to: string;
	subject: string;
	html: string;
}

// Create reusable transporter object using SMTP transport
const transporter = nodemailer.createTransport({
	service: 'gmail',
	auth: {
		user: process.env.EMAIL_USER,
		pass: process.env.EMAIL_PASSWORD, // Use App Password for Gmail
	},
});

export async function sendEmail({ to, subject, html }: EmailOptions) {
	try {
		const info = await transporter.sendMail({
			from: `"Table Tennis Booking" <${process.env.EMAIL_USER}>`,
			to,
			subject,
			html,
		});

		console.log('Email sent: %s', info.messageId);
		return { success: true, messageId: info.messageId };
	} catch (error) {
		console.error('Error sending email:', error);
		return { success: false, error };
	}
}

export function generateBookingConfirmationEmail(booking: {
	id: string;
	date: string;
	startTime: string;
	endTime: string;
	courtName: string;
	userName: string;
}) {
	return {
		subject: 'Booking Confirmation - Table Tennis Court',
		html: `
      <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto;">
        <h2 style="color: #333;">Booking Confirmed!</h2>
        <p>Hello ${booking.userName},</p>
        <p>Your table tennis court booking has been confirmed:</p>
        
        <div style="background-color: #f5f5f5; padding: 20px; border-radius: 8px; margin: 20px 0;">
          <h3 style="margin-top: 0;">Booking Details</h3>
          <p><strong>Booking ID:</strong> ${booking.id}</p>
          <p><strong>Date:</strong> ${booking.date}</p>
          <p><strong>Time:</strong> ${booking.startTime} - ${booking.endTime}</p>
          <p><strong>Court:</strong> ${booking.courtName}</p>
        </div>
        
        <p>Please arrive 5 minutes before your booking time. If you need to cancel or modify your booking, please log in to your account.</p>
        
        <p>Thank you for choosing our table tennis facility!</p>
        
        <hr style="margin: 30px 0;">
        <p style="font-size: 12px; color: #666;">
          This is an automated email. Please do not reply to this message.
        </p>
      </div>
    `,
	};
}

export function generateBookingCancellationEmail(booking: {
	id: string;
	date: string;
	startTime: string;
	endTime: string;
	courtName: string;
	userName: string;
}) {
	return {
		subject: 'Booking Cancelled - Table Tennis Court',
		html: `
      <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto;">
        <h2 style="color: #d32f2f;">Booking Cancelled</h2>
        <p>Hello ${booking.userName},</p>
        <p>Your table tennis court booking has been cancelled:</p>
        
        <div style="background-color: #f5f5f5; padding: 20px; border-radius: 8px; margin: 20px 0;">
          <h3 style="margin-top: 0;">Cancelled Booking Details</h3>
          <p><strong>Booking ID:</strong> ${booking.id}</p>
          <p><strong>Date:</strong> ${booking.date}</p>
          <p><strong>Time:</strong> ${booking.startTime} - ${booking.endTime}</p>
          <p><strong>Court:</strong> ${booking.courtName}</p>
        </div>
        
        <p>You can make a new booking anytime through our booking system.</p>
        
        <p>Thank you for using our table tennis facility!</p>
        
        <hr style="margin: 30px 0;">
        <p style="font-size: 12px; color: #666;">
          This is an automated email. Please do not reply to this message.
        </p>
      </div>
    `,
	};
}