using System.Web;
using Hutopy.Infrastructure.Configuration;
using Hutopy.Infrastructure.Emailer.Contracts;
using Hutopy.Modules.Identity.Data;
using Microsoft.Extensions.Options;

namespace Hutopy.Modules.Identity.Services;

[PublicAPI]
public sealed class EmailVerificationService(
    IOptionsSnapshot<WebsiteOptions> options,
    UserManager userManager,
    IEmailSender emailSender)
{
    public async Task SendVerificationEmailAsync(
        User user)
    {
        // Generate email confirmation token
        string token = await userManager.GenerateEmailConfirmationTokenAsync(user);
        string encodedToken = HttpUtility.UrlEncode(token);
        string verificationLink = $"{options.Value.FrontendBaseUrl}/verify-email?userId={user.Id}&token={encodedToken}";

        // Send verification email
        await emailSender.SendEmailAsync(
            user.Email!,
            "Verify your email address",
            $"""
             <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto; padding: 20px; color: #333;">
               <h1 style="color: #2c3e50; margin-bottom: 20px;">Welcome to Hutopy!</h1>
               
               <p style="font-size: 16px; line-height: 1.5; margin-bottom: 25px;">
                 Please verify your email address by clicking the button below:
               </p>
               
               <div style="text-align: center; margin: 30px 0;">
                 <a href='{verificationLink}' 
                    style="background-color: #3498db; 
                           color: white; 
                           text-decoration: none; 
                           padding: 12px 24px; 
                           border-radius: 4px; 
                           font-weight: bold; 
                           display: inline-block; 
                           box-shadow: 0 2px 5px rgba(0,0,0,0.1);">
                   Verify Email Address
                 </a>
               </div>
               
               <p style="font-size: 14px; color: #7f8c8d; margin-top: 30px;">
                 If you did not request this, please ignore this email.
               </p>
               
               <p style="font-size: 14px; color: #7f8c8d; margin-top: 20px;">
                 If the button doesn't work, you can copy and paste this link into your browser:
                 <br>
                 <a href='{verificationLink}' style="color: #3498db; word-break: break-all;">{verificationLink}</a>
               </p>
             </div>
             """);
    }
}