using Microsoft.AspNetCore.Mvc;
using MimeKit;
using SmtpClient = MailKit.Net.Smtp.SmtpClient;

var builder = WebApplication.CreateBuilder(args);

var allowedOrigins = builder.Configuration.GetSection("CorsSettings:AllowedOrigins").Get<string[]>() ?? Array.Empty<string>();

builder.Services.AddCors(options =>
{
    options.AddPolicy("AllowStrictOrigins", policy =>
    {
        policy.WithOrigins(allowedOrigins)
              .AllowAnyHeader()
              .AllowAnyMethod();
    });
});

var app = builder.Build();

app.UseCors("AllowStrictOrigins");

app.MapPost("/api/send-email", async ([FromBody] EmailRequest request, IConfiguration config) =>
{
    try
    {
        var message = new MimeMessage();

        var defaultFrom = config["SmtpSettings:DefaultFrom"];
        var defaultTo = config["SmtpSettings:DefaultTo"];

        var fromAddress = string.IsNullOrWhiteSpace(request.From) ? defaultFrom : request.From;
        var toAddress = string.IsNullOrWhiteSpace(request.To) ? defaultTo : request.To;

        message.From.Add(MailboxAddress.Parse(fromAddress!));
        message.To.Add(MailboxAddress.Parse(toAddress!));
        message.Subject = "New message from LiteCharms";

        var bodyBuilder = new BodyBuilder { HtmlBody = request.HtmlBody };
        message.Body = bodyBuilder.ToMessageBody();

        using var client = new SmtpClient();

        var host = config["SmtpSettings:Host"];
        var port = config.GetValue<int>("SmtpSettings:Port");
        var useSsl = config.GetValue<bool>("SmtpSettings:UseSsl");
        var username = config["SmtpSettings:Username"];
        var password = config["SmtpSettings:Password"];

        await client.ConnectAsync(host!, port, useSsl);
        await client.AuthenticateAsync(username!, password!);
        await client.SendAsync(message);
        await client.DisconnectAsync(true);

        return Results.Ok(new { success = true, message = "Email dispatched successfully." });
    }
    catch (Exception ex)
    {
        return Results.Problem(detail: ex.Message, statusCode: 500);
    }
});

app.Run();