using CMSMicroservice.Protobuf.Protos.Package;

namespace FrontOffice.Main.Utilities;

/// <summary>
/// Package data transfer object for UI display
/// </summary>
public record PackageDto(
    long Id,
    string Title,
    string Description,
    string ImageUrl,
    long Price)
{
    public string FormattedPrice => string.Format("{0:N0} تومان", Price);
}

/// <summary>
/// User's package purchase status
/// </summary>
public record UserPackageStatusDto(
    bool HasPurchasedPackage,
    string? PackageTitle,
    string? PurchaseMethod, // DayaLoan, DirectPurchase, or null
    bool IsClubMemberActive,
    long WalletBalance,
    bool CanActivateClubMembership,
    DateTime? PurchaseDate);

/// <summary>
/// Service for managing packages in FrontOffice
/// </summary>
public class PackageService
{
    private readonly CMSMicroservice.Protobuf.Protos.Package.PackageContract.PackageContractClient _client;

    public PackageService(CMSMicroservice.Protobuf.Protos.Package.PackageContract.PackageContractClient client)
    {
        _client = client;
    }

    /// <summary>
    /// Get all available packages
    /// </summary>
    public async Task<List<PackageDto>> GetAllPackagesAsync(CancellationToken ct = default)
    {
        try
        {
            var request = new GetCustomerPackagesRequest();

            var response = await _client.GetCustomerPackagesAsync(request, cancellationToken: ct);

            return response.Models
                .Select(m => new PackageDto(
                    m.Id,
                    m.Title,
                    m.Description,
                    m.ImagePath,
                    m.Price))
                .ToList();
        }
        catch (Exception ex)
        {
#if DEBUG
            Console.WriteLine($"Error fetching packages: {ex.Message}");
#endif
            return new List<PackageDto>();
        }
    }

    /// <summary>
    /// Get a single package by ID
    /// </summary>
    public async Task<PackageDto?> GetPackageByIdAsync(long id, CancellationToken ct = default)
    {
        try
        {
            var response = await _client.GetCustomerPackageDetailsAsync(
                new GetCustomerPackageDetailsRequest { PackageId = id },
                cancellationToken: ct);

            if (response == null) return null;

            return new PackageDto(
                response.Id,
                response.Title,
                response.Description,
                response.ImagePath,
                response.Price);
        }
        catch (Exception ex)
        {
#if DEBUG
            Console.WriteLine($"Error fetching package {id}: {ex.Message}");
#endif
            return null;
        }
    }

    /// <summary>
    /// Get user's package purchase status
    /// </summary>
    public Task<UserPackageStatusDto> GetUserPackageStatusAsync(CancellationToken ct = default)
    {
        // TODO: Connect to GetUserPackageStatus RPC when available in FrontOffice.BFF
        return Task.FromResult(new UserPackageStatusDto(
            HasPurchasedPackage: false,
            PackageTitle: null,
            PurchaseMethod: null,
            IsClubMemberActive: false,
            WalletBalance: 0,
            CanActivateClubMembership: false,
            PurchaseDate: null));
    }
}