import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../../core/app_theme.dart';
import '../../../features/auth/auth_notifier.dart';
import '../../../features/auth/auth_state.dart';
import '../providers/control_notifier.dart';
import '../providers/monitoring_provider.dart';
import '../widgets/device_status_card.dart';
import '../widgets/device_control_section.dart';
import '../widgets/greeting_section.dart';
import '../widgets/schedule_section.dart';

import '../widgets/add_schedule_sheet.dart';
import '../widgets/operation_mode_card.dart';

class ControlPage extends ConsumerWidget {
  const ControlPage({super.key});

  void _onAddSchedule(BuildContext context, WidgetRef ref) {
    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      backgroundColor: Colors.transparent,
      builder: (ctx) => AddScheduleSheet(
        onSave: (time, days, durationS) {
          ref.read(controlProvider.notifier).addSchedule(time, days, durationS);
        },
      ),
    );
  }

  void _showManualDurationDialog(BuildContext context, WidgetRef ref) {
    int selectedDuration = 30; // default

    showDialog(
      context: context,
      builder: (ctx) {
        return StatefulBuilder(
          builder: (context, setState) {
            return AlertDialog(
              title: const Text('Lama Penyiraman'),
              content: Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  const Text('Pilih durasi pompa menyala secara manual:'),
                  const SizedBox(height: 16),
                  Wrap(
                    spacing: 8,
                    runSpacing: 8,
                    children: [
                      {'label': '15s', 'val': 15},
                      {'label': '30s', 'val': 30},
                      {'label': '1m', 'val': 60},
                      {'label': '2m', 'val': 120},
                      {'label': '5m', 'val': 300},
                    ].map((opt) {
                      final val = opt['val'] as int;
                      final isSelected = selectedDuration == val;
                      return ChoiceChip(
                        label: Text(opt['label'] as String),
                        selected: isSelected,
                        onSelected: (bool selected) {
                          if (selected) {
                            setState(() => selectedDuration = val);
                          }
                        },
                        selectedColor: AppTheme.primary,
                        labelStyle: TextStyle(
                          color: isSelected ? Colors.white : AppTheme.textSecondary,
                          fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
                        ),
                        backgroundColor: Colors.grey.shade200,
                      );
                    }).toList(),
                  ),
                ],
              ),
              actions: [
                TextButton(
                  onPressed: () => Navigator.pop(ctx),
                  child: const Text('Batal'),
                ),
                ElevatedButton(
                  style: ElevatedButton.styleFrom(backgroundColor: AppTheme.primary),
                  onPressed: () {
                    Navigator.pop(ctx);
                    ref.read(controlProvider.notifier).togglePump(selectedDuration);
                  },
                  child: const Text('Mulai', style: TextStyle(color: Colors.white)),
                ),
              ],
            );
          },
        );
      },
    );
  }

  void _showStopConfirmationDialog(BuildContext context, WidgetRef ref) {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('Hentikan Penyiraman?'),
        content: const Text('Apakah Anda yakin ingin mematikan pompa saat ini?'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx),
            child: const Text('Batal'),
          ),
          ElevatedButton(
            style: ElevatedButton.styleFrom(backgroundColor: AppTheme.statusDanger),
            onPressed: () {
              Navigator.pop(ctx);
              ref.read(controlProvider.notifier).togglePump();
            },
            child: const Text('Matikan', style: TextStyle(color: Colors.white)),
          ),
        ],
      ),
    );
  }

  void _confirmDelete(BuildContext context, WidgetRef ref, String id) {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('Hapus Jadwal?'),
        content: const Text('Jadwal ini akan dihapus secara permanen.'),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(ctx).pop(),
            child: const Text('Batal'),
          ),
          TextButton(
            style: TextButton.styleFrom(foregroundColor: AppTheme.statusDanger),
            onPressed: () {
              Navigator.of(ctx).pop();
              ref.read(controlProvider.notifier).removeSchedule(id);
            },
            child: const Text('Hapus'),
          ),
        ],
      ),
    );
  }

  String _getUserName(WidgetRef ref) {
    final authState = ref.watch(authProvider);
    if (authState is AuthSuccess) return authState.user.name;
    return 'Pengguna';
  }

  String _getDeviceCode(WidgetRef ref) {
    final authState = ref.watch(authProvider);
    if (authState is AuthSuccess) return authState.user.deviceId ?? '-';
    return '-';
  }

  bool _checkIsOnline(WidgetRef ref) {
    return ref.watch(monitoringProvider).isDeviceOnline;
  }

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    // ── Listener untuk Snackbar Error & Success ──
    ref.listen(controlProvider, (prev, next) {
      if (next.errorMessage != null) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text(next.errorMessage!),
            backgroundColor: AppTheme.statusDanger,
          ),
        );
        ref.read(controlProvider.notifier).clearMessage();
      }
      if (next.successMessage != null) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text(next.successMessage!),
            backgroundColor: AppTheme.statusNormal,
          ),
        );
        ref.read(controlProvider.notifier).clearMessage();
      }
    });

    final control  = ref.watch(controlProvider);
    final notifier = ref.read(controlProvider.notifier);
    
    final userName   = _getUserName(ref);
    final deviceCode = _getDeviceCode(ref);
    final isOnline   = _checkIsOnline(ref);
    final authState  = ref.watch(authProvider);
    final hasDevice  = authState is AuthSuccess && authState.user.deviceId != null;

    return Scaffold(
      backgroundColor: AppTheme.bgPage,
      body: SafeArea(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              GreetingSection(
                userName: userName,
                subtitle: hasDevice ? 'Selamat Datang di Kontrol Panel' : 'Kontrol Panel Nonaktif',
              ),
              const SizedBox(height: 20),

              if (!hasDevice) ...[
                const SizedBox(height: 40),
                Container(
                  width: double.infinity,
                  padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 36),
                  decoration: BoxDecoration(
                    color: Colors.white,
                    borderRadius: BorderRadius.circular(24),
                    boxShadow: [
                      BoxShadow(
                        color: Colors.black.withValues(alpha: 0.04),
                        blurRadius: 16,
                        offset: const Offset(0, 4),
                      ),
                    ],
                  ),
                  child: const Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      Icon(
                        Icons.sensors_off_outlined,
                        size: 64,
                        color: Colors.grey,
                      ),
                      SizedBox(height: 24),
                      Text(
                        'Kontrol Perangkat Dinonaktifkan',
                        style: TextStyle(
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                          color: AppTheme.textPrimary,
                        ),
                      ),
                      SizedBox(height: 12),
                      Text(
                        'Silakan hubungkan perangkat kumbung jamur Anda terlebih dahulu pada halaman Monitoring (tab pertama) dengan menekan tombol + dan memasukkan Claim Code Anda.',
                        textAlign: TextAlign.center,
                        style: TextStyle(
                          fontSize: 13,
                          color: AppTheme.textSecondary,
                          height: 1.5,
                        ),
                      ),
                    ],
                  ),
                ),
              ] else ...[
                DeviceStatusCard(
                  isOnline: isOnline,
                  deviceCode: deviceCode,
                  lastSeen: ref.watch(monitoringProvider).latest?.timestamp,
                ),
                const SizedBox(height: 20),

              const OperationModeCard(),
              const SizedBox(height: 16),

              DeviceControlSection(
                isPumpOn: control.isPumpOn,
                isOnline: isOnline,
                suhuMinLimit: control.suhuMinLimit,
                suhuMaxLimit: control.suhuMaxLimit,
                kelembapanLimit: control.kelembapanLimit,
                activePumpDuration: control.activePumpDuration,
                pumpTurnedOnAt: control.pumpTurnedOnAt,
                onPumpToggle: () {
                  if (control.isPumpOn) {
                    _showStopConfirmationDialog(context, ref);
                  } else {
                    _showManualDurationDialog(context, ref);
                  }
                },
                onSaveThreshold: (suhuMin, suhuMax, kelembapan) =>
                    notifier.saveThreshold(suhuMin, suhuMax, kelembapan),
              ),
              const SizedBox(height: 20),

              // Jika sedang loading initial data, tampilkan loading utama
              if (control.isLoading && control.schedules.isEmpty)
                const Center(child: CircularProgressIndicator())
              else ...[
                // Jika loading tapi schedules sudah ada (misal proses tambah jadwal),
                // tampilkan progress bar tipis di atas section
                if (control.isLoading && control.schedules.isNotEmpty)
                  const LinearProgressIndicator(),

                ScheduleSection(
                  schedules: control.schedules,
                  onAddSchedule: () => _onAddSchedule(context, ref),
                  onToggleSchedule: (id, _) => notifier.toggleSchedule(id),
                  onRemoveSchedule: (id) => _confirmDelete(context, ref, id),
                ),
              ],
              const SizedBox(height: 20),
              _buildWateringReferenceCard(),
            ],
          ],
          ),
        ),
      ),
    );
  }

  Widget _buildWateringReferenceCard() {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(20),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: 0.02),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: const EdgeInsets.all(6),
                decoration: const BoxDecoration(
                  color: Color(0xFFE0F2F1), // Light teal background matching theme
                  shape: BoxShape.circle,
                ),
                child: const Icon(Icons.info_outline, color: AppTheme.primary, size: 16),
              ),
              const SizedBox(width: 10),
              const Text(
                'Panduan Penyiraman Terbaik',
                style: TextStyle(
                  fontSize: 14,
                  fontWeight: FontWeight.bold,
                  color: AppTheme.textPrimary,
                ),
              ),
            ],
          ),
          const SizedBox(height: 12),
          const Text(
            'Untuk menjaga kualitas tumbuh kembang Jamur Tiram, berikut adalah rekomendasi waktu & frekuensi penyiraman otomatis/manual:',
            style: TextStyle(fontSize: 12, color: AppTheme.textSecondary, height: 1.4),
          ),
          const SizedBox(height: 12),
          Row(
            children: [
              Expanded(
                child: _buildWateringIndicator(
                  icon: Icons.schedule,
                  iconColor: Colors.orange,
                  label: 'Waktu Terbaik',
                  value: 'Pagi & Sore',
                ),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: _buildWateringIndicator(
                  icon: Icons.loop,
                  iconColor: Colors.blue,
                  label: 'Frekuensi Ideal',
                  value: '2 - 3 Kali / Hari',
                ),
              ),
            ],
          ),
          const SizedBox(height: 12),
          Divider(color: Colors.grey.shade100),
          const SizedBox(height: 8),
          const Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Icon(Icons.tips_and_updates_outlined, size: 16, color: Colors.orangeAccent),
              SizedBox(width: 8),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      'Tips Penyiraman:',
                      style: TextStyle(
                        fontSize: 12,
                        fontWeight: FontWeight.bold,
                        color: AppTheme.textPrimary,
                      ),
                    ),
                    SizedBox(height: 4),
                    Text(
                      '• Pagi (06.00-08.00 WIB) & Sore (16.00-18.00 WIB) membantu menyeimbangkan penguapan air di siang hari.\n• Hindari penyiraman berlebih jika kelembapan kumbung sudah di atas 80% atau saat hujan lebat agar baglog tidak membusuk.',
                      style: TextStyle(fontSize: 11, color: AppTheme.textSecondary, height: 1.5),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildWateringIndicator({
    required IconData icon,
    required Color iconColor,
    required String label,
    required String value,
  }) {
    return Container(
      padding: const EdgeInsets.all(10),
      decoration: BoxDecoration(
        color: iconColor.withValues(alpha: 0.05),
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: iconColor.withValues(alpha: 0.1)),
      ),
      child: Row(
        children: [
          Icon(icon, color: iconColor, size: 20),
          const SizedBox(width: 8),
          Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                label,
                style: const TextStyle(fontSize: 9, color: AppTheme.textSecondary),
              ),
              const SizedBox(height: 2),
              Text(
                value,
                style: TextStyle(
                  fontSize: 12,
                  fontWeight: FontWeight.bold,
                  color: iconColor.withValues(alpha: 0.9),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}