using CMSMicroservice.Application.Common.Interfaces;
using CMSMicroservice.Application.DiscountShopCQ.Commands.CompleteOrderPayment;
using CMSMicroservice.Application.WalletCQ.Commands.VerifyMagicWalletCharge;
using MediatR;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace CMSMicroservice.WebApi.Controllers;

/// <summary>
/// Callback endpoint for payment gateways (ZarinPal, etc.)
/// درگاه پرداخت بعد از پرداخت (یا لغو) کاربر را به اینجا redirect می‌کند
/// </summary>
[ApiController]
[AllowAnonymous] // کاربر از درگاه بانک برمی‌گردد — JWT ندارد
[ApiExplorerSettings(GroupName = "cms")]
public class PaymentCallbackController : ControllerBase
{
    private readonly ISender _sender;
    private readonly IPaymentGatewayService _paymentGateway;
    private readonly IApplicationDbContext _context;
    private readonly IConfiguration _configuration;
    private readonly ILogger<PaymentCallbackController> _logger;

    public PaymentCallbackController(
        ISender sender,
        IPaymentGatewayService paymentGateway,
        IApplicationDbContext context,
        IConfiguration configuration,
        ILogger<PaymentCallbackController> logger)
    {
        _sender = sender;
        _paymentGateway = paymentGateway;
        _context = context;
        _configuration = configuration;
        _logger = logger;
    }

    /// <summary>
    /// Callback برای پرداخت سفارش فروشگاه تخفیفی
    /// زرین‌پال کاربر را با Authority و Status به این endpoint برمی‌گرداند
    /// </summary>
    [HttpGet("/api/payment/discount-order/callback")]
    public async Task<IActionResult> DiscountOrderCallback(
        [FromQuery] long orderId,
        [FromQuery(Name = "Authority")] string? authority,
        [FromQuery(Name = "Status")] string? status,
        CancellationToken cancellationToken)
    {
        var frontOfficeBaseUrl = _configuration["FrontOfficeBaseUrl"] ?? "https://localhost:5268";

        _logger.LogInformation(
            "Payment callback received: OrderId={OrderId}, Authority={Authority}, Status={Status}",
            orderId, authority, status);

        try
        {
            // پیدا کردن سفارش و تراکنش
            var order = await _context.DiscountOrders
                .Include(o => o.OrderDetails)
                .FirstOrDefaultAsync(o => o.Id == orderId, cancellationToken);

            if (order == null)
            {
                _logger.LogError("Payment callback: Order #{OrderId} not found", orderId);
                return Redirect($"{frontOfficeBaseUrl}/discount-store/orders?error=order-not-found");
            }

            var transaction = order.TransactionId.HasValue
                ? await _context.Transactions.FirstOrDefaultAsync(
                    t => t.Id == order.TransactionId.Value, cancellationToken)
                : null;

            // تأیید پرداخت از درگاه
            bool paymentSuccess = false;
            string? refId = null;

            if (string.Equals(status, "OK", StringComparison.OrdinalIgnoreCase)
                && !string.IsNullOrEmpty(authority))
            {
                // Verify با مبلغ از دیتابیس (تومان)
                var verifyResult = await _paymentGateway.VerifyPaymentAsync(
                    authority,
                    status!,
                    order.GatewayAmountPaid,  // مبلغ به تومان
                    cancellationToken);

                paymentSuccess = verifyResult.IsSuccess;
                refId = verifyResult.TrackingCode ?? verifyResult.RefId;

                // آپدیت PaymentTransaction با نتیجه verify
                var paymentTx = await _context.PaymentTransactions
                    .FirstOrDefaultAsync(pt => pt.Authority == authority, cancellationToken);
                if (paymentTx != null)
                {
                    paymentTx.PaymentStatus = verifyResult.IsSuccess;
                    paymentTx.VerificationStatusCode = verifyResult.VerificationCode;
                    paymentTx.VerificationStatusMessage = verifyResult.Message;
                    paymentTx.CardPan = verifyResult.CardPan;
                    paymentTx.CardHash = verifyResult.CardHash;
                    paymentTx.RefId = verifyResult.TrackingCode;
                    await _context.SaveChangesAsync(cancellationToken);
                }

                _logger.LogInformation(
                    "Payment verification for Order #{OrderId}: Success={Success}, RefId={RefId}, Message={Message}",
                    orderId, paymentSuccess, refId, verifyResult.Message);
            }
            else
            {
                _logger.LogWarning("Payment cancelled by user for Order #{OrderId}", orderId);
            }

            // تکمیل سفارش از طریق CQRS
            var completeResult = await _sender.Send(new CompleteOrderPaymentCommand
            {
                OrderId = orderId,
                TransactionId = transaction?.Id ?? 0,
                PaymentSuccess = paymentSuccess,
                RefId = refId
            }, cancellationToken);

            // Redirect به FrontOffice
            if (paymentSuccess && completeResult.Success)
            {
                _logger.LogInformation("Payment completed successfully for Order #{OrderId}", orderId);
                return Redirect(
                    $"{frontOfficeBaseUrl}/discount-store/order/{orderId}?payment=success");
            }
            else
            {
                _logger.LogWarning("Payment failed for Order #{OrderId}", orderId);
                return Redirect(
                    $"{frontOfficeBaseUrl}/discount-store/order/{orderId}?payment=failed");
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Payment callback error for Order #{OrderId}", orderId);
            return Redirect(
                $"{frontOfficeBaseUrl}/discount-store/order/{orderId}?payment=error");
        }
    }

    /// <summary>
    /// Callback برای شارژ کیف‌پول جادویی — زرین‌پال بعد از پرداخت کاربر را اینجا برمی‌گرداند
    /// </summary>
    [HttpGet("/api/wallet/verify-magic-charge")]
    public async Task<IActionResult> MagicChargeCallback(
        [FromQuery(Name = "Authority")] string? authority,
        [FromQuery(Name = "Status")] string? status,
        CancellationToken cancellationToken)
    {
        var frontOfficeBaseUrl = _configuration["FrontOfficeBaseUrl"] ?? "https://localhost:5268";

        _logger.LogInformation(
            "Magic charge callback received: Authority={Authority}, Status={Status}",
            authority, status);

        try
        {
            if (string.IsNullOrEmpty(authority))
            {
                _logger.LogError("Magic charge callback: Authority is missing");
                return Redirect($"{frontOfficeBaseUrl}/magic-wallet?payment=error&reason=no-authority");
            }

            var result = await _sender.Send(new VerifyMagicWalletChargeCommand
            {
                Authority = authority,
                Status = status ?? "NOK"
            }, cancellationToken);

            _logger.LogInformation(
                "Magic charge completed successfully. Authority={Authority}",
                authority);

            return Redirect($"{frontOfficeBaseUrl}/magic-wallet?payment=success");
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Magic charge callback error. Authority={Authority}", authority);
            return Redirect($"{frontOfficeBaseUrl}/magic-wallet?payment=failed");
        }
    }
}