using EntitlementBLL.Auth;
using EntitlementBLL.Interfaces;
using EntitlementSL.Common;
using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using ErrorResponse = GB5Shared.Resource.Response.ErrorResponse;
using static GB5Shared.GB5Constant.Constant;

namespace EntitlementSL.Endpoints.License;

// Client-facing equivalent of GetUtilisation — ILicenseBLL.GetUtilisationAsync(clientId,...) is
// already scoped correctly by its clientId argument, so this just sources that argument from
// verified JWT claims instead of a caller-supplied query parameter.
public class GetMyUtilisation : BaseEndpoint<GetMyUtilisation.Params, ResponseStandardDTO<object>>
{
    private const string ClientJwtSchemeName = "ClientJwtBearer";

    private readonly ILicenseBLL _LicenseBLL;

    public GetMyUtilisation(ILicenseBLL licenseBLL) => _LicenseBLL = licenseBLL;

    public override void Configure()
    {
        Get("/lic/License.svc/GetMyUtilisation");
        AuthSchemes(ClientJwtSchemeName);
        Roles(ClientRoleCodes.ClientAdmin, ClientRoleCodes.ClientUser);
    }

    public record Params([property: FromHeader] string Login);

    protected override string? GetCacheKey(Params req, LoginDTO loginDTO)
    {
        var caller = ClientCallerContext.FromClaims(HttpContext.User.Claims);
        return KeyGenerator.KeyGeneration(caller.ClientId, EntityConstant.OBJECTENTITLEMENTLICENSE, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
    }

    protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(Params req, LoginDTO loginDTO, CancellationToken ct)
    {
        var caller = ClientCallerContext.FromClaims(HttpContext.User.Claims);
        if (caller.ClientId <= 0)
            return await GB5Shared.ResponseStandard.Response.CreateErrorResponse<object>(
                ErrorResponse.AccessDeniedMessage, CacheKeyLevel.NOT_REQUIRED, loginDTO, statusCode: 403);

        var result = await _LicenseBLL.GetUtilisationAsync(caller.ClientId, loginDTO, ct);
        return await GB5Shared.ResponseStandard.Response.CreateSuccessResponseEnumerable(result, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
    }
}