@page "/profile/payment-callback"
@attribute [Authorize]
@using Blazored.LocalStorage
@using CMSMicroservice.Protobuf.Protos.Package
@using CMSMicroservice.Protobuf.Protos.User
@using FrontOffice.Main.Utilities


<PageTitle>نتیجه پرداخت | کارا بازار سلامت</PageTitle>

<MudContainer MaxWidth="MaxWidth.Small" Class="py-8">
    <MudPaper Class="pa-6 text-center">
        @if (_isLoading)
        {
            <MudProgressCircular Color="Color.Primary" Indeterminate="true" Size="Size.Large" />
            <MudText Typo="Typo.h6" Class="mt-4">در حال بررسی وضعیت پرداخت...</MudText>
        }
        else if (_isSuccess)
        {
            <MudIcon Icon="@Icons.Material.Filled.CheckCircle" Color="Color.Success" Size="Size.Large" Style="font-size: 80px" />
            <MudText Typo="Typo.h5" Color="Color.Success" Class="mt-4">پرداخت موفق</MudText>
            <MudText Typo="Typo.body1" Class="mt-2">@_message</MudText>
            
            @if (_transactionId > 0)
            {
                <MudText Typo="Typo.body2" Class="mt-3">
                    <strong>کد ارجاعی:</strong> @_transactionId
                </MudText>
            }
            
            <MudDivider Class="my-4" />
            
            <MudText Typo="Typo.body2" Color="Color.Secondary">
                موجودی کیف پول اصلی: @FormatPrice(_walletBalance)
            </MudText>
            
            <MudButton Color="Color.Primary" Variant="Variant.Filled" Class="mt-6"
                       Href="@_successReturnUrl">
                @_successReturnText
            </MudButton>
        }
        else
        {
            <MudIcon Icon="@Icons.Material.Filled.Error" Color="Color.Error" Size="Size.Large" Style="font-size: 80px" />
            <MudText Typo="Typo.h5" Color="Color.Error" Class="mt-4">پرداخت ناموفق</MudText>
            <MudText Typo="Typo.body1" Class="mt-2">@_message</MudText>
            
            <MudButton Color="Color.Primary" Variant="Variant.Filled" Class="mt-6"
                       Href="@_failReturnUrl">
                @_failReturnText
            </MudButton>
            
            <MudButton Color="Color.Secondary" Variant="Variant.Outlined" Class="mt-3 mr-2"
                       OnClick="RetryPayment">
                تلاش مجدد
            </MudButton>
        }
    </MudPaper>
</MudContainer>

@code {
    [Inject] private PackageContract.PackageContractClient PackageContractClient { get; set; } = default!;
    [Inject] private UserContract.UserContractClient UserContractClient { get; set; } = default!;
    [Inject] private DiscountOrderService DiscountOrderService { get; set; } = default!;
    [Inject] private ILocalStorageService LocalStorage { get; set; } = default!;
    [Inject] private AuthService AuthService { get; set; } = default!;
    [Inject] private NavigationManager NavManager { get; set; } = default!;
    
    private const string TokenStorageKey = "auth:token";
    
    /// <summary>
    /// نوع پرداخت: package (پیش‌فرض) | magic-wallet | discount-wallet | discount-order
    /// </summary>
    [SupplyParameterFromQuery(Name = "type")]
    private string? PaymentType { get; set; }
    
    [SupplyParameterFromQuery(Name = "orderId")]
    private long OrderId { get; set; }
    
    [SupplyParameterFromQuery(Name = "transactionId")]
    private long TransactionId { get; set; }
    
    [SupplyParameterFromQuery(Name = "Authority")]
    private string? Authority { get; set; }
    
    [SupplyParameterFromQuery(Name = "Status")]
    private string? Status { get; set; }
    
    private bool _isLoading = true;
    private bool _isSuccess;
    private string _message = string.Empty;
    private long _transactionId;
    private long _walletBalance;
    private bool _verifyCompleted;
    private readonly SemaphoreSlim _verifyGate = new(1, 1);
    
    // دکمه‌های بازگشت بسته به نوع پرداخت
    private string _successReturnUrl = "/profile";
    private string _successReturnText = "بازگشت به پروفایل";
    private string _failReturnUrl = "/profile";
    private string _failReturnText = "بازگشت به پروفایل";

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender && !_verifyCompleted)
        {
            await VerifyPaymentOnceAsync();
        }
    }

    /// <summary>
    /// Blazor Server may invoke render/verify twice in quick succession — gate with semaphore.
    /// </summary>
    private async Task VerifyPaymentOnceAsync()
    {
        if (_verifyCompleted) return;

        await _verifyGate.WaitAsync();
        try
        {
            if (_verifyCompleted) return;
            await VerifyPayment();
            _verifyCompleted = true;
        }
        finally
        {
            _verifyGate.Release();
        }
    }

    private async Task VerifyPayment()
    {
        try
        {
            // تعیین نوع پرداخت — اگر type نباشد، پیش‌فرض خرید پکیج
            var type = PaymentType?.ToLowerInvariant() ?? "package";
            
            switch (type)
            {
                case "magic-wallet":
                    await VerifyMagicWalletCharge();
                    break;
                case "discount-wallet":
                    await VerifyDiscountWalletCharge();
                    break;
                case "credit-wallet":
                    await VerifyCreditWalletCharge();
                    break;
                case "discount-order":
                    await VerifyDiscountOrderPayment();
                    break;
                default: // "package" or missing
                    await VerifyPackagePurchase();
                    break;
            }
        }
        catch (Exception ex)
        {
            _isSuccess = false;
            _message = $"خطا در بررسی وضعیت پرداخت: {ex.Message}";
        }
        finally
        {
            _isLoading = false;
            StateHasChanged();
        }
    }
    
    /// <summary>
    /// تأیید خرید پکیج — رفتار فعلی
    /// </summary>
    private async Task VerifyPackagePurchase()
    {
        _successReturnUrl = "/profile";
        _successReturnText = "بازگشت به پروفایل";
        _failReturnUrl = "/profile";
        _failReturnText = "بازگشت به پروفایل";
        
        if (OrderId <= 0 || string.IsNullOrEmpty(Authority))
        {
            _isSuccess = false;
            _message = "پارامترهای پرداخت نامعتبر است";
            return;
        }

        var response = await PackageContractClient.CustomerVerifyPackagePurchaseAsync(new CustomerVerifyPackagePurchaseRequest
        {
            OrderId = OrderId,
            Authority = Authority ?? string.Empty,
            Status = Status ?? string.Empty
        });

        _isSuccess = response.Success;
        _message = response.Message;
        _transactionId = response.TransactionId;
        
        if (_isSuccess)
        {
            await UpdateWalletBalanceAndRefreshToken();
        }
    }
    
    /// <summary>
    /// تأیید شارژ کیف‌پول جادویی
    /// </summary>
    private async Task VerifyMagicWalletCharge()
    {
        _successReturnUrl = "/profile/magic-wallet";
        _successReturnText = "بازگشت به کیف پول جادویی";
        _failReturnUrl = "/profile/magic-wallet";
        _failReturnText = "بازگشت به کیف پول جادویی";
        
        if (string.IsNullOrEmpty(Authority))
        {
            _isSuccess = false;
            _message = "کد Authority نامعتبر است";
            return;
        }

        var (success, message) = await WalletService.VerifyMagicChargeAsync(
            Authority, Status ?? "NOK");
        
        _isSuccess = success;
        _message = message;
        
        if (_isSuccess)
        {
            await UpdateWalletBalance();
        }
    }
    
    /// <summary>
    /// تأیید شارژ کیف پول تخفیفی
    /// </summary>
    private async Task VerifyDiscountWalletCharge()
    {
        _successReturnUrl = "/profile/charge-discount-wallet";
        _successReturnText = "بازگشت به کیف پول تخفیفی";
        _failReturnUrl = "/profile/charge-discount-wallet";
        _failReturnText = "بازگشت به کیف پول تخفیفی";
        
        if (string.IsNullOrEmpty(Authority))
        {
            _isSuccess = false;
            _message = "کد Authority نامعتبر است";
            return;
        }

        var (success, message) = await WalletService.VerifyDiscountChargeAsync(
            Authority, Status ?? "NOK");
        
        _isSuccess = success;
        _message = message;
        
        if (_isSuccess)
        {
            await UpdateWalletBalance();
        }
    }

    /// <summary>
    /// تأیید شارژ کیف پول اصلی
    /// </summary>
    private async Task VerifyCreditWalletCharge()
    {
        _successReturnUrl = "/profile/charge-credit-wallet?payment=success";
        _successReturnText = "بازگشت به شارژ کیف پول اصلی";
        _failReturnUrl = "/profile/charge-credit-wallet?payment=failed";
        _failReturnText = "بازگشت به شارژ کیف پول اصلی";

        if (string.IsNullOrEmpty(Authority))
        {
            _isSuccess = false;
            _message = "کد Authority نامعتبر است";
            return;
        }

        var (success, message) = await WalletService.VerifyCreditChargeAsync(
            Authority, Status ?? "NOK");

        _isSuccess = success;
        _message = message;

        if (_isSuccess)
        {
            await UpdateWalletBalance();
        }
    }
    
    /// <summary>
    /// تأیید پرداخت سفارش فروشگاه تخفیفی
    /// </summary>
    private async Task VerifyDiscountOrderPayment()
    {
        _successReturnUrl = $"/discount-store/order/{OrderId}";
        _successReturnText = "مشاهده سفارش";
        _failReturnUrl = $"/discount-store/order/{OrderId}";
        _failReturnText = "مشاهده سفارش";
        
        if (OrderId <= 0 || string.IsNullOrEmpty(Authority))
        {
            _isSuccess = false;
            _message = "پارامترهای پرداخت نامعتبر است";
            return;
        }

        var (success, message, _) = await DiscountOrderService.VerifyDiscountOrderPaymentAsync(
            OrderId, Authority, Status ?? "NOK");
        
        _isSuccess = success;
        _message = message;
    }
    
    /// <summary>
    /// بروزرسانی موجودی کیف پول
    /// </summary>
    private async Task UpdateWalletBalance()
    {
        try
        {
            var balances = await WalletService.GetBalancesAsync();
            _walletBalance = balances.CreditBalance;
        }
        catch { /* اگر خطا شد، صفر نمایش بده */ }
    }
    
    /// <summary>
    /// بروزرسانی موجودی + refresh توکن (فقط برای خرید پکیج)
    /// </summary>
    private async Task UpdateWalletBalanceAndRefreshToken()
    {
        await UpdateWalletBalance();
        await RefreshTokenAsync();
    }

    private void RetryPayment()
    {
        var type = PaymentType?.ToLowerInvariant() ?? "package";
        var url = type switch
        {
            "magic-wallet" => "/profile/magic-wallet",
            "discount-wallet" => "/profile/charge-discount-wallet",
            "credit-wallet" => "/profile/charge-credit-wallet",
            "discount-order" => "/discount-store",
            _ => "/profile"
        };
        NavManager.NavigateTo(url, forceLoad: true);
    }
    
    /// <summary>
    /// Refresh token after successful payment to update PackagePurchaseMethod claim
    /// </summary>
    private async Task RefreshTokenAsync()
    {
        try
        {
            var userResponse = await UserContractClient.GetUserForCustomerAsync(new CMSMicroservice.Protobuf.Protos.User.GetUserForCustomerRequest());
            if (!string.IsNullOrWhiteSpace(userResponse.Token))
            {
                // ذخیره توکن جدید در localStorage
                await LocalStorage.SetItemAsync(TokenStorageKey, userResponse.Token);
                
                // به‌روزرسانی UserAuthInfo با claims جدید
                await AuthService.InitUserAuthInfo();
            }
        }
        catch
        {
            // اگر refresh ناموفق بود، پرداخت همچنان موفق است
            // کاربر می‌تواند با logout/login دوباره token جدید بگیرد
        }
    }

    private static string FormatPrice(long price) => string.Format("{0:N0} تومان", price);
}