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

import '../models/energy_data.dart';
import '../providers/schema_provider.dart';
import '../services/nymea_service.dart';
import '../services/rpc_schema.dart';
import '../theme/etm_tokens.dart';
import 'schema_gated.dart';

class EVChargingCard extends StatefulWidget {
  final EnergyData data;
  final NymeaService service;

  const EVChargingCard({
    super.key,
    required this.data,
    required this.service,
  });

  @override
  State<EVChargingCard> createState() => _EVChargingCardState();
}

class _EVChargingCardState extends State<EVChargingCard> {
  // Deadline option state — local UI, not persisted
  bool _deadlineEnabled = false;
  int _targetSoc = 80;
  DateTime _endTime = DateTime.now().add(const Duration(hours: 4));

  void _selectMode(ChargingMode mode) {
    // Selecting Boost auto-disables deadline
    if (mode == ChargingMode.boost && _deadlineEnabled) {
      setState(() => _deadlineEnabled = false);
    }
    _send(
      mode: mode,
      deadline: mode != ChargingMode.boost && _deadlineEnabled,
    );
  }

  /// Envoie, et **annonce le refus** au lieu de le perdre. La cause exacte reste au
  /// journal de la box : on ne la devine pas.
  Future<void> _send({required ChargingMode mode, required bool deadline}) async {
    final err = await widget.service.setChargingInfo(
      mode: mode,
      deadline: deadline,
      targetSoc: _targetSoc,
      endTime: _endTime,
    );
    if (err == null || !mounted) return;
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text('La box a refusé le mode de recharge ($err). '
          'Détail dans son journal.'),
    ));
  }

  void _toggleDeadline(bool enabled) {
    setState(() => _deadlineEnabled = enabled);
    _send(mode: widget.data.chargingMode, deadline: enabled);
  }

  void _applyDeadline() {
    _send(mode: widget.data.chargingMode, deadline: _deadlineEnabled);
  }

  /// Support des champs d'échéance, lu dans le schéma de la box.
  ///
  /// Les deux vont ensemble : une échéance sans cible de charge n'a pas de sens, et
  /// l'inverse non plus. On grise donc le bloc entier dès que l'un manque.
  FieldSupport _socSupport(BuildContext context) {
    final schema = context.watch<SchemaProvider>().schema;
    final soc = schema.typeSupport('ChargingInfo', ['targetPercentage']);
    final end = schema.typeSupport('ChargingInfo', ['endDateTime']);
    if (soc == FieldSupport.unknown || end == FieldSupport.unknown) {
      return FieldSupport.unknown;
    }
    if (soc == FieldSupport.absent || end == FieldSupport.absent) {
      return FieldSupport.absent;
    }
    return FieldSupport.writable;
  }

  /// Vrai si le contrat de recharge ne porte aucun champ de courant minimal.
  bool _minCurrentAbsent(BuildContext context) {
    final schema = context.watch<SchemaProvider>().schema;
    if (!schema.loaded) return false;
    return schema.typeSupport('ChargingInfo', ['minCurrent']) ==
        FieldSupport.absent;
  }

  String _statusLabel(ChargingMode mode) {
    switch (mode) {
      case ChargingMode.pv:
        return _deadlineEnabled
            ? 'Surplus PV → Boost auto avant deadline'
            : 'Surplus PV disponible';
      case ChargingMode.minPv:
        return _deadlineEnabled
            ? 'Min garanti + PV → Boost si deadline'
            : 'Minimum + surplus PV';
      case ChargingMode.boost:
        return 'Charge rapide (réseau)';
    }
  }

  Future<void> _pickEndTime() async {
    final initial = TimeOfDay.fromDateTime(_endTime);
    final picked = await showTimePicker(context: context, initialTime: initial);
    if (picked != null) {
      setState(() {
        final now = DateTime.now();
        _endTime = DateTime(now.year, now.month, now.day, picked.hour, picked.minute);
        // If picked time is in the past, roll to tomorrow
        if (_endTime.isBefore(now)) {
          _endTime = _endTime.add(const Duration(days: 1));
        }
      });
      _applyDeadline();
    }
  }

  @override
  Widget build(BuildContext context) {
    final mode = widget.data.chargingMode;
    final data = widget.data;
    final showDeadlineOption = mode != ChargingMode.boost;

    return Container(
      decoration: BoxDecoration(
        color: EtmTokens.surfaceOf(context),
        borderRadius: BorderRadius.circular(EtmTokens.radiusLg),
        boxShadow: EtmTokens.cardShadow,
      ),
      padding: const EdgeInsets.all(20),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Header
          Row(
            children: [
              Container(
                width: 34, height: 34,
                decoration: BoxDecoration(
                  color: EtmTokens.navy.withValues(alpha: 0.07),
                  borderRadius: BorderRadius.circular(10),
                ),
                child: const Icon(Icons.ev_station_rounded, color: EtmTokens.navy, size: 20),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text('Borne de recharge (EVSE)',
                        style: EtmTokens.sans(size: 15, weight: FontWeight.w600)),
                    Text(_statusLabel(mode),
                        style: EtmTokens.sans(size: 12, color: EtmTokens.mutedOf(context))),
                  ],
                ),
              ),
              GestureDetector(
                onTap: () => _showSettings(context),
                child: Icon(Icons.tune, color: EtmTokens.faintOf(context), size: 20),
              ),
            ],
          ),
          const SizedBox(height: 14),

          // Status badge + power
          Row(
            crossAxisAlignment: CrossAxisAlignment.end,
            children: [
              Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Container(
                    padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
                    decoration: BoxDecoration(
                      color: EtmTokens.greenSoft,
                      borderRadius: BorderRadius.circular(99),
                    ),
                    child: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Container(width: 6, height: 6,
                            decoration: const BoxDecoration(color: EtmTokens.green, shape: BoxShape.circle)),
                        const SizedBox(width: 5),
                        Text('En charge',
                            style: EtmTokens.sans(size: 12, weight: FontWeight.w600, color: EtmTokens.greenDark)),
                      ],
                    ),
                  ),
                  const SizedBox(height: 8),
                  Text(
                    '${(data.chargingPower * 1000).toStringAsFixed(0)}',
                    style: EtmTokens.mono(size: 38, weight: FontWeight.w700),
                  ),
                  Text('W  Puissance actuelle',
                      style: EtmTokens.sans(size: 12, color: EtmTokens.mutedOf(context))),
                ],
              ),
              const Spacer(),
              Column(
                crossAxisAlignment: CrossAxisAlignment.end,
                children: [
                  Text('${data.solarSourcePercent.toStringAsFixed(0)}%',
                      style: EtmTokens.mono(size: 22, color: EtmTokens.green)),
                  Text('solaire', style: EtmTokens.sans(size: 11, color: EtmTokens.mutedOf(context))),
                ],
              ),
            ],
          ),
          const SizedBox(height: 16),

            // Mode buttons — 3 boutons : PV / Min+PV / Boost
            Row(
              children: [
                _ModeButton(
                  label: 'PV',
                  icon: Icons.wb_sunny_rounded,
                  color: EtmTokens.amber,
                  isSelected: mode == ChargingMode.pv,
                  onTap: () => _selectMode(ChargingMode.pv),
                ),
                const SizedBox(width: 8),
                _ModeButton(
                  label: 'Min+PV',
                  icon: Icons.bolt,
                  color: EtmTokens.blue,
                  isSelected: mode == ChargingMode.minPv,
                  onTap: () => _selectMode(ChargingMode.minPv),
                ),
                const SizedBox(width: 8),
                _ModeButton(
                  label: 'Boost',
                  icon: Icons.rocket_launch_rounded,
                  color: EtmTokens.green,
                  isSelected: mode == ChargingMode.boost,
                  onTap: () => _selectMode(ChargingMode.boost),
                ),
              ],
            ),

            // Échéance — visible pour PV et Min+PV, et **active seulement si la box
            // porte les champs**. Le grisage vient du schéma, jamais d'une table de
            // versions : le jour où le plugin expose `endDateTime`, le réglage s'active
            // seul sur les box à jour et reste gris sur les autres.
            if (showDeadlineOption) ...[
              const SizedBox(height: 8),
              SchemaGated(
                support: _socSupport(context),
                fieldName: 'targetPercentage / endDateTime',
                label: 'Échéance de recharge',
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    _DeadlineToggleRow(
                      enabled: _deadlineEnabled,
                      onChanged: _toggleDeadline,
                    ),
                    if (_deadlineEnabled) ...[
                      const SizedBox(height: 10),
                      _DeadlineParamsRow(
                        targetSoc: _targetSoc,
                        endTime: _endTime,
                        onSocChanged: (v) {
                          setState(() => _targetSoc = v);
                          _applyDeadline();
                        },
                        onPickTime: _pickEndTime,
                      ),
                    ],
                  ],
                ),
              ),
              // Le mode « minimum garanti » existe côté box, mais la VALEUR du courant
              // minimal n'est dans aucun champ de `ChargingInfo` : elle ne se règle pas
              // ici. Le dire, plutôt que d'offrir un réglage sans effet.
              if (_minCurrentAbsent(context)) ...[
                const SizedBox(height: 8),
                _AbsentFieldNote(
                  'Le courant minimal du mode « Min + PV » n\'est pas réglable depuis '
                  'l\'app : la box choisit le mode, mais n\'expose aucun champ '
                  '« minCurrent » dans son contrat de recharge.',
                ),
              ],
            ],

            // Cible de charge — affichée SEULEMENT quand l'écran l'a lui-même écrite.
            //
            // `targetPercentage` n'est pas un réglage que l'app peut lire et présenter
            // comme un choix de l'utilisateur : `SetChargingInfo` reconstruit l'objet
            // entier, et le défaut C++ du champ vaut **80**. Une écriture qui ne parlait
            // que du mode de charge laisse donc 80 derrière elle, sans que rien ne le
            // signale — reproduit sur `.75` le 2026-08-27. Montrer « cible 80 % » hors
            // échéance afficherait cette empreinte comme une intention.
            //
            // Hors échéance, l'app n'a pas de cible : elle n'en montre pas.
            if (_deadlineEnabled) ...[
              const SizedBox(height: 14),
              _SocProgress(targetSoc: _targetSoc),
            ],
          ],
        ),
      );
  }

  void _showSettings(BuildContext context) {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (_) => const _ChargingSettingsSheet(),
    );
  }
}

class _DeadlineToggleRow extends StatelessWidget {
  final bool enabled;
  final ValueChanged<bool> onChanged;

  const _DeadlineToggleRow({required this.enabled, required this.onChanged});

  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
        Row(
          children: [
            Icon(Icons.flag_outlined, size: 16,
                color: enabled ? EtmTokens.blue : EtmTokens.faintOf(context)),
            const SizedBox(width: 6),
            Text('Cible deadline',
                style: EtmTokens.sans(size: 13,
                    color: enabled ? EtmTokens.blue : EtmTokens.mutedOf(context),
                    weight: enabled ? FontWeight.w600 : FontWeight.w400)),
          ],
        ),
        Switch(
          value: enabled,
          onChanged: onChanged,
          activeThumbColor: EtmTokens.blue,
          materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
        ),
      ],
    );
  }
}

class _DeadlineParamsRow extends StatelessWidget {
  final int targetSoc;
  final DateTime endTime;
  final ValueChanged<int> onSocChanged;
  final VoidCallback onPickTime;

  const _DeadlineParamsRow({
    required this.targetSoc,
    required this.endTime,
    required this.onSocChanged,
    required this.onPickTime,
  });

  @override
  Widget build(BuildContext context) {
    final timeLabel =
        '${endTime.hour.toString().padLeft(2, '0')}:${endTime.minute.toString().padLeft(2, '0')}';

    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
      decoration: BoxDecoration(
        color: EtmTokens.blueSoft,
        borderRadius: BorderRadius.circular(12),
      ),
      child: Column(
        children: [
          Row(
            children: [
              const Icon(Icons.battery_charging_full, size: 16, color: EtmTokens.blue),
              const SizedBox(width: 6),
              Text('SOC cible : $targetSoc %',
                  style: EtmTokens.sans(size: 12, color: EtmTokens.blue)),
              Expanded(
                child: Slider(
                  value: targetSoc.toDouble(),
                  min: 0,
                  max: 100,
                  divisions: 20,
                  label: '$targetSoc %',
                  activeColor: EtmTokens.blue,
                  onChanged: (v) => onSocChanged(v.round()),
                ),
              ),
            ],
          ),
          GestureDetector(
            onTap: onPickTime,
            child: Row(
              children: [
                const Icon(Icons.access_time, size: 16, color: EtmTokens.blue),
                const SizedBox(width: 6),
                Text('Heure d\'arrivée :', style: EtmTokens.sans(size: 12, color: EtmTokens.blue)),
                const SizedBox(width: 8),
                Text(timeLabel, style: EtmTokens.mono(size: 13, color: EtmTokens.blue)),
                const SizedBox(width: 4),
                const Icon(Icons.edit, size: 12, color: EtmTokens.blue),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

class _ModeButton extends StatelessWidget {
  final String label;
  final IconData icon;
  final Color color;
  final bool isSelected;
  final VoidCallback onTap;

  const _ModeButton({
    required this.label,
    required this.icon,
    required this.color,
    required this.isSelected,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    return Expanded(
      child: GestureDetector(
        onTap: onTap,
        child: AnimatedContainer(
          duration: const Duration(milliseconds: 200),
          padding: const EdgeInsets.symmetric(vertical: 11),
          decoration: BoxDecoration(
            color: isSelected ? color : color.withValues(alpha: 0.10),
            borderRadius: BorderRadius.circular(12),
            border: Border.all(color: isSelected ? color : color.withValues(alpha: 0.3)),
          ),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Icon(icon, color: isSelected ? Colors.white : color, size: 15),
              const SizedBox(width: 4),
              Text(
                label,
                style: EtmTokens.sans(
                  size: 13,
                  weight: FontWeight.w600,
                  color: isSelected ? Colors.white : color,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

/// Barre de progression SOC de la voiture avec target et valeur courante.
/// Cible de charge du véhicule — **la cible seule, jamais un état de charge**.
///
/// Cette carte affichait « 62 % » et « Aujourd'hui à 07:30 » en dur. Les deux sont
/// retirés, et il faut dire pourquoi le second correctif possible n'en est pas un :
///
/// **aucun SOC de véhicule n'existe dans ce contrat.** Vérifié sur `.75` le 2026-08-27,
/// sur les 58 classes de la box : aucune classe portant l'interface `evcharger` ne
/// déclare d'état de charge, aucune classe ne porte l'interface `car`, et les deux bornes
/// du banc publient `pluggedIn`, `charging`, `maxChargingCurrent`, `phaseCount`,
/// `sessionEnergy` — jamais un pourcentage.
///
/// Le seul `batteryLevel` de l'installation est celui de la **batterie de la maison**
/// (Fronius Storage, 50 %), rendu visible par le correctif `energystorage` du plugin
/// SunSpec. C'est une autre grandeur : la brancher ici afficherait la charge du bâtiment
/// en face d'une cible de voiture. Un chiffre faux et plausible est pire qu'un chiffre
/// absent — c'était déjà le défaut du 62 en dur, le remplacer par 50 le garderait en le
/// rendant crédible.
///
/// Reste donc ce que l'app SAIT : la cible qu'elle vient elle-même d'écrire. La barre de
/// progression disparaît avec la mesure — une jauge sans grandeur mesurée est un dessin.
class _SocProgress extends StatelessWidget {
  final int targetSoc;
  const _SocProgress({required this.targetSoc});

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
      decoration: BoxDecoration(
        color: EtmTokens.blueSoft,
        borderRadius: BorderRadius.circular(13),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text('Charge demandée jusqu\'à',
                  style: EtmTokens.sans(size: 13, color: EtmTokens.navy)),
              Text('$targetSoc%',
                  style: EtmTokens.mono(size: 13, color: EtmTokens.blue)),
            ],
          ),
          const SizedBox(height: 2),
          Text(
            'La box ne publie pas l\'état de charge du véhicule : l\'avancement ne peut '
            'pas être affiché.',
            style: EtmTokens.sans(size: 11, color: EtmTokens.mutedOf(context)),
          ),
        ],
      ),
    );
  }
}

class _ChargingSettingsSheet extends StatefulWidget {
  const _ChargingSettingsSheet();

  @override
  State<_ChargingSettingsSheet> createState() => _ChargingSettingsSheetState();
}

class _ChargingSettingsSheetState extends State<_ChargingSettingsSheet> {
  double _minPower = 6;
  double _maxPower = 16;
  bool _scheduleEnabled = false;
  TimeOfDay _startTime = const TimeOfDay(hour: 22, minute: 0);
  TimeOfDay _endTime = const TimeOfDay(hour: 6, minute: 0);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(20),
      child: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const Text('Paramètres de charge',
              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
          const SizedBox(height: 20),
          Text('Courant minimum (A)', style: EtmTokens.sans(size: 14, weight: FontWeight.w500)),
          Slider(
            value: _minPower,
            min: 6,
            max: 16,
            divisions: 10,
            label: '${_minPower.toStringAsFixed(0)} A',
            onChanged: (v) => setState(() => _minPower = v),
            activeColor: EtmTokens.green,
          ),
          Text('Courant maximum (A)', style: EtmTokens.sans(size: 14, weight: FontWeight.w500)),
          Slider(
            value: _maxPower,
            min: 6,
            max: 32,
            divisions: 26,
            label: '${_maxPower.toStringAsFixed(0)} A',
            onChanged: (v) => setState(() => _maxPower = v),
            activeColor: EtmTokens.green,
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text('Programmation horaire', style: EtmTokens.sans(size: 14, weight: FontWeight.w500)),
              Switch(
                value: _scheduleEnabled,
                onChanged: (v) => setState(() => _scheduleEnabled = v),
                activeColor: EtmTokens.green,
              ),
            ],
          ),
          if (_scheduleEnabled) ...[
            Row(
              children: [
                Expanded(
                  child: _TimePicker(
                    label: 'Début',
                    time: _startTime,
                    onChanged: (t) => setState(() => _startTime = t),
                  ),
                ),
                const SizedBox(width: 16),
                Expanded(
                  child: _TimePicker(
                    label: 'Fin',
                    time: _endTime,
                    onChanged: (t) => setState(() => _endTime = t),
                  ),
                ),
              ],
            ),
          ],
          const SizedBox(height: 16),
          SizedBox(
            width: double.infinity,
            child: ElevatedButton(
              onPressed: () => Navigator.pop(context),
              style: ElevatedButton.styleFrom(
                backgroundColor: EtmTokens.green,
                foregroundColor: Colors.white,
                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
              ),
              child: const Text('Enregistrer'),
            ),
          ),
        ],
      ),
    );
  }
}

class _TimePicker extends StatelessWidget {
  final String label;
  final TimeOfDay time;
  final ValueChanged<TimeOfDay> onChanged;

  const _TimePicker({
    required this.label,
    required this.time,
    required this.onChanged,
  });

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () async {
        final picked = await showTimePicker(context: context, initialTime: time);
        if (picked != null) onChanged(picked);
      },
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
        decoration: BoxDecoration(
          border: Border.all(color: Colors.grey.shade300),
          borderRadius: BorderRadius.circular(8),
        ),
        child: Row(
          children: [
            Icon(Icons.access_time, size: 16, color: EtmTokens.faintOf(context)),
            const SizedBox(width: 8),
            Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(label, style: EtmTokens.sans(size: 11, color: EtmTokens.mutedOf(context))),
                Text(
                  '${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}',
                  style: EtmTokens.mono(size: 13),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}
/// Note d'un champ que la box n'expose pas — **avec sa raison**, jamais un simple gris.
class _AbsentFieldNote extends StatelessWidget {
  final String text;

  const _AbsentFieldNote(this.text);

  @override
  Widget build(BuildContext context) {
    final muted = EtmTokens.mutedOf(context);
    return Row(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Icon(Icons.cloud_off_outlined, size: 13, color: muted),
        const SizedBox(width: 5),
        Expanded(
          child: Text(text,
              style: TextStyle(fontSize: 11.5, color: muted, height: 1.3)),
        ),
      ],
    );
  }
}