// Author: fruit.com.cn

part of 'auth_view.dart';

class _AuthCardState {
  const _AuthCardState({
    required this.l10n,
    required this.status,
    required this.fields,
  });

  final AppLocalizations l10n;
  final _AuthFormStatus status;
  final _AuthFieldControllers fields;
}

class _AuthFormStatus {
  const _AuthFormStatus({
    required this.signUpMode,
    required this.busy,
    required this.errorMessage,
    required this.fieldError,
    required this.obscurePassword,
  });

  final bool signUpMode;
  final bool busy;
  final String? errorMessage;
  final AuthFieldError? fieldError;
  final bool obscurePassword;
}

class _AuthFieldControllers {
  const _AuthFieldControllers({
    required this.email,
    required this.password,
    required this.emailFocus,
    required this.passwordFocus,
  });

  final TextEditingController email;
  final TextEditingController password;
  final FocusNode emailFocus;
  final FocusNode passwordFocus;
}

class _AuthCardCallbacks {
  const _AuthCardCallbacks({
    required this.onModeSelected,
    required this.onEmailChanged,
    required this.onPasswordChanged,
    required this.onTogglePasswordVisibility,
    required this.onSubmit,
  });

  final ValueChanged<bool> onModeSelected;
  final ValueChanged<String> onEmailChanged;
  final ValueChanged<String> onPasswordChanged;
  final VoidCallback onTogglePasswordVisibility;
  final VoidCallback onSubmit;
}

class _AuthCard extends StatelessWidget {
  const _AuthCard({required this.state, required this.callbacks});

  final _AuthCardState state;
  final _AuthCardCallbacks callbacks;

  @override
  Widget build(BuildContext context) {
    final l10n = state.l10n;
    final status = state.status;
    return Container(
      key: const Key('auth-card'),
      padding: const EdgeInsets.all(_cardPadding),
      decoration: BoxDecoration(
        color: AppColors.card,
        borderRadius: BorderRadius.circular(_cardRadius),
        boxShadow: const [AppTheme.cardShadow],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          _AuthModeSwitch(
            l10n: l10n,
            signUpMode: status.signUpMode,
            busy: status.busy,
            onSelected: callbacks.onModeSelected,
          ),
          const SizedBox(height: 22),
          Text(
            status.signUpMode ? l10n.authSignUpTitle : l10n.authSignInTitle,
            style: const TextStyle(
              color: AppColors.onSurface,
              fontSize: 25,
              fontWeight: FontWeight.w800,
              height: 1.2,
            ),
          ),
          const SizedBox(height: 6),
          Text(
            status.signUpMode ? l10n.authSignUpSubtitle : l10n.authSubtitle,
            style: const TextStyle(
              color: AppColors.muted,
              fontSize: AppDimens.body,
              height: 1.45,
            ),
          ),
          const SizedBox(height: 22),
          _AuthFields(state: state, callbacks: callbacks),
          if (status.errorMessage != null) ...[
            const SizedBox(height: 14),
            _AuthError(message: status.errorMessage!),
          ],
          const SizedBox(height: 22),
          _AuthSubmitButton(state: state, onSubmit: callbacks.onSubmit),
        ],
      ),
    );
  }
}

class _AuthModeSwitch extends StatelessWidget {
  const _AuthModeSwitch({
    required this.l10n,
    required this.signUpMode,
    required this.busy,
    required this.onSelected,
  });

  final AppLocalizations l10n;
  final bool signUpMode;
  final bool busy;
  final ValueChanged<bool> onSelected;

  @override
  Widget build(BuildContext context) {
    return TextButton(
      key: const Key('auth-switch-mode'),
      onPressed: busy ? null : () => onSelected(!signUpMode),
      style: TextButton.styleFrom(
        minimumSize: const Size(0, _minTapTarget),
        padding: EdgeInsets.zero,
        overlayColor: AppColors.transparent,
        splashFactory: NoSplash.splashFactory,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(22)),
      ),
      child: Container(
        height: 36,
        padding: const EdgeInsets.all(2),
        decoration: BoxDecoration(
          color: AppColors.raised,
          borderRadius: BorderRadius.circular(18),
        ),
        child: Row(
          children: [
            Expanded(
              child: _ModeSegment(
                segmentKey: const Key('auth-mode-sign-in'),
                label: l10n.signIn,
                hiddenLabel: l10n.authSwitchToSignIn,
                selected: !signUpMode,
                onTap: busy ? null : () => onSelected(false),
              ),
            ),
            const SizedBox(width: 4),
            Expanded(
              child: _ModeSegment(
                segmentKey: const Key('auth-mode-sign-up'),
                label: l10n.signUp,
                hiddenLabel: l10n.authSwitchToSignUp,
                selected: signUpMode,
                onTap: busy ? null : () => onSelected(true),
              ),
            ),
          ],
        ),
      ),
    );
  }
}