using Avalonia_Services.Services.AuthService;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace Avalonia_PC.Authentication
{
    /// <summary>
    /// 第三方授权客户端占位实现。接入真实第三方接口时替换此服务即可。
    /// </summary>
    public sealed class DefaultPcThirdPartyAuthorizationClient : IPcThirdPartyAuthorizationClient
    {
        /// <summary>
        /// 验证第三方授权码是否有效。默认实现将 "invalid" 视为授权丢失，其余视为有效。
        /// </summary>
        /// <param name="authorizationCode">第三方授权码。</param>
        /// <param name="cancellationToken">取消令牌。</param>
        /// <returns>授权检查结果。</returns>
        public Task<ThirdPartyAuthCheckResult> ValidateAuthorizationCodeAsync(
            string authorizationCode,
            CancellationToken cancellationToken = default)
        {
            if (string.IsNullOrWhiteSpace(authorizationCode) ||
                string.Equals(authorizationCode, "invalid", StringComparison.OrdinalIgnoreCase))
            {
                return Task.FromResult(ThirdPartyAuthCheckResult.AuthorizationLost);
            }

            return Task.FromResult(ThirdPartyAuthCheckResult.Valid);
        }

        /// <summary>
        /// 刷新第三方授权。默认实现总是返回 TemporaryFailure，表示暂时无法刷新。
        /// </summary>
        /// <param name="authorizationReference">授权引用标识。</param>
        /// <param name="cancellationToken">取消令牌。</param>
        /// <returns>授权检查结果。</returns>
        public Task<ThirdPartyAuthCheckResult> RefreshAuthorizationAsync(
            string authorizationReference,
            CancellationToken cancellationToken = default)
        {
            if (string.Equals(authorizationReference, "invalid", StringComparison.OrdinalIgnoreCase))
            {
                return Task.FromResult(ThirdPartyAuthCheckResult.AuthorizationLost);
            }

            return Task.FromResult(ThirdPartyAuthCheckResult.TemporaryFailure);
        }
    }
}