using Amazon.SimpleEmailV2;
using Amazon.SimpleEmailV2.Model;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using ProposalSystem.Application.Interfaces;

namespace ProposalSystem.Infrastructure.Services;

public class SesEmailService : IEmailService
{
    private readonly IAmazonSimpleEmailServiceV2 _ses;
    private readonly string _fromAddress;
    private readonly ILogger<SesEmailService> _logger;

    public SesEmailService(
        IAmazonSimpleEmailServiceV2 ses,
        IConfiguration config,
        ILogger<SesEmailService> logger)
    {
        _ses = ses;
        _fromAddress = config["SES_FROM_ADDRESS"]
            ?? throw new InvalidOperationException(
                "SES_FROM_ADDRESS environment variable is required for email delivery.");
        _logger = logger;
    }

    public async Task SendProposalDeliveryAsync(
        string toEmail,
        string proposalNumber,
        string customerName,
        string pdfUrl,
        CancellationToken ct = default)
    {
        var subject = $"Your proposal {proposalNumber} from Sea Haven Industries";

        var htmlBody = $@"
<html>
<body style=""font-family: Arial, sans-serif; color: #333;"">
    <p>Dear {System.Net.WebUtility.HtmlEncode(customerName)},</p>
    <p>Your proposal <strong>{System.Net.WebUtility.HtmlEncode(proposalNumber)}</strong> is ready for review.</p>
    <p>
        <a href=""{System.Net.WebUtility.HtmlEncode(pdfUrl)}"" style=""display: inline-block; padding: 10px 20px; background-color: #0066cc; color: #ffffff; text-decoration: none; border-radius: 4px;"">View Proposal PDF</a>
    </p>
    <p>This link will expire in 7 days. If you have any questions, please contact us directly.</p>
    <p>Thank you,<br/>Sea Haven Industries</p>
</body>
</html>";

        var textBody = $@"Dear {customerName},

Your proposal {proposalNumber} is ready for review.

View the proposal PDF at: {pdfUrl}

This link will expire in 7 days. If you have any questions, please contact us directly.

Thank you,
Sea Haven Industries";

        var request = new SendEmailRequest
        {
            FromEmailAddress = _fromAddress,
            Destination = new Destination
            {
                ToAddresses = new List<string> { toEmail },
            },
            Content = new EmailContent
            {
                Simple = new Message
                {
                    Subject = new Content { Data = subject },
                    Body = new Body
                    {
                        Html = new Content { Data = htmlBody },
                        Text = new Content { Data = textBody },
                    },
                },
            },
        };

        await _ses.SendEmailAsync(request, ct);
        _logger.LogInformation(
            "Proposal delivery email sent for {ProposalNumber}",
            proposalNumber);
    }
}