import 'package:flutter/material.dart';
import 'package:dio/dio.dart';
import 'package:monitoring/config.dart';

class ChangePasswordScreen extends StatefulWidget {
  final String token;
  const ChangePasswordScreen({super.key, required this.token});

  @override
  State<ChangePasswordScreen> createState() => _ChangePasswordScreenState();
}

class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
  final _formKey = GlobalKey<FormState>();
  final _oldPassController = TextEditingController();
  final _newPassController = TextEditingController();
  final _confirmPassController = TextEditingController();

  bool _loading = false;
  bool _obscureOld = true;
  bool _obscureNew = true;
  bool _obscureConfirm = true;

  Future<void> _submit() async {
    if (!_formKey.currentState!.validate()) return;

    setState(() => _loading = true);

    try {
      final dio = Dio(
        BaseOptions(
          headers: {
            'Authorization': 'Bearer ${widget.token}',
            'Accept': 'application/json',
          },
        ),
      );

      final response = await dio.post(
        '$baseUrl/password',
        data: {
          'old_password': _oldPassController.text.trim(),
          'new_password': _newPassController.text.trim(),
          'confirm_password': _confirmPassController.text.trim(),
        },
      );

      if (context.mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text(response.data['message'] ?? 'Berhasil')),
        );
        Navigator.pop(context);
      }
    } on DioException catch (e) {
      final msg =
          e.response?.data['message'] ??
          e.response?.data.toString() ??
          'Gagal mengganti password';
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
    } catch (_) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Terjadi kesalahan saat mengganti password'),
        ),
      );
    } finally {
      setState(() => _loading = false);
    }
  }

  @override
  void dispose() {
    _oldPassController.dispose();
    _newPassController.dispose();
    _confirmPassController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    const fieldPadding = EdgeInsets.symmetric(vertical: 8);

    return Scaffold(
      appBar: AppBar(title: const Text('Ganti Password')),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(20),
        child: Form(
          key: _formKey,
          child: Column(
            children: [
              const Text(
                'Untuk alasan keamanan, gunakan password baru yang kuat dan mudah diingat.',
                style: TextStyle(fontSize: 14, color: Colors.black87),
              ),
              const SizedBox(height: 16),

              /// Old password
              Padding(
                padding: fieldPadding,
                child: TextFormField(
                  controller: _oldPassController,
                  obscureText: _obscureOld,
                  decoration: InputDecoration(
                    labelText: 'Password Saat Ini',
                    border: const OutlineInputBorder(),
                    suffixIcon: IconButton(
                      icon: Icon(
                        _obscureOld ? Icons.visibility_off : Icons.visibility,
                      ),
                      onPressed:
                          () => setState(() => _obscureOld = !_obscureOld),
                    ),
                  ),
                  validator:
                      (val) =>
                          val == null || val.isEmpty ? 'Wajib diisi' : null,
                ),
              ),

              /// New password
              Padding(
                padding: fieldPadding,
                child: TextFormField(
                  controller: _newPassController,
                  obscureText: _obscureNew,
                  decoration: InputDecoration(
                    labelText: 'Password Baru',
                    border: const OutlineInputBorder(),
                    suffixIcon: IconButton(
                      icon: Icon(
                        _obscureNew ? Icons.visibility_off : Icons.visibility,
                      ),
                      onPressed:
                          () => setState(() => _obscureNew = !_obscureNew),
                    ),
                  ),
                  validator: (val) {
                    if (val == null || val.isEmpty) return 'Wajib diisi';
                    if (val.length < 6) return 'Minimal 6 karakter';
                    return null;
                  },
                ),
              ),

              /// Confirm password
              Padding(
                padding: fieldPadding,
                child: TextFormField(
                  controller: _confirmPassController,
                  obscureText: _obscureConfirm,
                  decoration: InputDecoration(
                    labelText: 'Konfirmasi Password Baru',
                    border: const OutlineInputBorder(),
                    suffixIcon: IconButton(
                      icon: Icon(
                        _obscureConfirm
                            ? Icons.visibility_off
                            : Icons.visibility,
                      ),
                      onPressed:
                          () => setState(
                            () => _obscureConfirm = !_obscureConfirm,
                          ),
                    ),
                  ),
                  validator:
                      (val) =>
                          val != _newPassController.text
                              ? 'Password tidak cocok'
                              : null,
                ),
              ),

              const SizedBox(height: 24),
              SizedBox(
                width: double.infinity,
                child: ElevatedButton.icon(
                  onPressed: _loading ? null : _submit,
                  icon: const Icon(Icons.lock_open),
                  label:
                      _loading
                          ? const SizedBox(
                            height: 20,
                            width: 20,
                            child: CircularProgressIndicator(
                              strokeWidth: 2,
                              color: Colors.white,
                            ),
                          )
                          : const Text('Simpan Password'),
                  style: ElevatedButton.styleFrom(
                    padding: const EdgeInsets.symmetric(vertical: 14),
                    backgroundColor: Colors.green,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(10),
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}