using BaronSoftware.Auth.Sample;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Windows;

namespace BaronSoftware.SSO.Sample
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private BaronSSO _license;
        private readonly SampleSettings _settings;

        public MainWindow()
        {
            InitializeComponent();

            _settings = SampleSettings.Load();

            var option = new BaronSSOOption()
            {
                Authority = _settings.Oidc.Authority,
                ClientId = _settings.Oidc.ClientId,
                RedirectUri = _settings.Oidc.RedirectUri,
                ExtraUserValidator = new SimpleUserValidator()
            };

            _license = new BaronSSO(option);
            LoginButton.Click += async (s,e) => await RunLogin("웹뷰 로그인", () => _license.SignInAsync());
            TokenLoginBuggon.Click += async (s,e) => await RunLogin("토큰 로그인", () => _license.SignInAsync(_license.CurrentUser.RefreshToken));
            SettingsButton.Click += SettingsButton_Click;
            LogoutButton.Click += LogoutButton_Click;

        }

        private void SettingsButton_Click(object sender, RoutedEventArgs e)
        {
            var dlg = new SettingsWindow(_settings.Oidc.Authority, _settings.Oidc.ClientId, _settings.Oidc.RedirectUri, _settings.Oidc.LogoutUri)
            {
                Owner = this
            };
            if (dlg.ShowDialog() != true) return;

            _settings.Oidc.Authority = dlg.Authority;
            _settings.Oidc.ClientId = dlg.ClientId;
            _settings.Oidc.RedirectUri = dlg.RedirectUri;
            _settings.Oidc.LogoutUri = dlg.LogoutUri;

            try
            {
                _settings.Save();

                var option = new BaronSSOOption()
                {
                    Authority = _settings.Oidc.Authority,
                    ClientId = _settings.Oidc.ClientId,
                    RedirectUri = _settings.Oidc.RedirectUri,
                    ExtraUserValidator = new SimpleUserValidator()
                };

                _license = new BaronSSO(option);

                OutputBox.Text =
                    "설정 저장 완료 ✔ (appsettings.json)\n\n" +
                    $"Authority   : {_settings.Oidc.Authority}\n" +
                    $"ClientId    : {_settings.Oidc.ClientId}\n" +
                    $"RedirectUri : {_settings.Oidc.RedirectUri}\n" +
                    $"LogoutUri   : {_settings.Oidc.LogoutUri}\n\n" +
                    "‘웹뷰로 로그인’으로 적용된 설정을 테스트하세요.";
            }
            catch (Exception ex)
            {
                OutputBox.Text = $"설정 저장 실패:\n{ex.Message}";
            }
        }


        private async void LogoutButton_Click(object sender, RoutedEventArgs e)
        {
            SetBusy(true);
            OutputBox.Text = "로그아웃 중... (토큰 + 세션 쿠키 삭제)";
            try
            {
                await _license.SignOutAsync();
                OutputBox.Text = "로그아웃 완료 ✔\n" +
                    "- refresh_token 삭제\n" +
                    "- WebView SSO 세션 쿠키 삭제\n" +
                    "→ 다음 ‘웹뷰로 로그인’ 시 로그인 창이 다시 표시됩니다.";
            }
            finally
            {
                SetBusy(false);
            }
        }

        private async Task RunLogin(string action, Func<Task> work)
        {
            SetBusy(true);
            OutputBox.Text = $"{action} 진행 중...";
            try
            {
                await work();
                OutputBox.Text = $"{action} 완료 ✔\n\n";
                OutputBox.Text += ShowLoginUserInfo(_license.CurrentUser);
                OutputBox.CaretIndex = 0; // 맨 위(요약)부터 보이도록
            }
            catch (OperationCanceledException)
            {
                OutputBox.Text = $"{action} 취소됨 (로그인 창이 닫힘).";
            }
            catch (Exception ex)
            {
                OutputBox.Text = $"{action} 실패:\n{ex.GetType().Name}: {ex.Message}";
            }
            finally
            {
                SetBusy(false);
            }
        }

        private void SetBusy(bool busy)=> LoginButton.IsEnabled = LogoutButton.IsEnabled = !busy;

        // For Display=============
        private string ShowLoginUserInfo(UserInfo u)
        {
            var sb = new StringBuilder();
            sb.AppendLine("로그인 성공 ✔");
            sb.AppendLine($"UserId(sub) : {u.UUID}");
            sb.AppendLine($"Name        : {u.Name}");
            sb.AppendLine($"Email       : {u.Email}");
            sb.AppendLine($"TenantIds   : {string.Join(", ", u.AllTenantIds ?? Array.Empty<string>())}");
            sb.AppendLine($"Last Auth Time     : {u.LastAuthTime}");
            sb.AppendLine($"Claims Start------------ \n ");
            sb.AppendLine(string.Join("\n", u.Claims.Select(kv => $"  {kv.Key}: {kv.Value}")));
            sb.AppendLine($"\nClaims End------------ \n ");
            sb.AppendLine(!string.IsNullOrWhiteSpace(u.RefreshToken)
                ? "자동 로그인 : 사용 가능 (refresh_token 저장됨)"
                : "자동 로그인 : 불가 — 리프레시 토큰 없음");

            sb.AppendLine();
            sb.AppendLine("==== token 엔드포인트 응답 (원본) ====");
            sb.AppendLine(PrettyJson(u.RawTokenResponse));

            sb.AppendLine();
            sb.AppendLine("==== userinfo 응답 ====");
            sb.AppendLine(PrettyJson(u.Raw));

            return sb.ToString();
        }

        private static readonly JsonSerializerOptions PrettyJsonOptions = new()
        {
            WriteIndented = true,
            // 한글 등 비ASCII를 \uXXXX로 이스케이프하지 않고 그대로 표시
            Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
        };

        /// <summary>JSON 문자열을 들여쓰기(pretty) 형태로 변환. 파싱 실패 시 원본 반환.</summary>
        private static string PrettyJson(string json)
        {
            if (string.IsNullOrWhiteSpace(json)) return json;
            try { return JsonNode.Parse(json)?.ToJsonString(PrettyJsonOptions) ?? json; }
            catch { return json; }
        }

        // ================



    }
}