import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart' show TimeOfDay;

enum TariffProviderType {
  manual,      // Tarif manuel saisi par l'utilisateur
  customJson,
  linkyTIC,
  tibberPro,
  octopusPro,
  entsoe,
  jsonRpc,
}

extension TariffProviderTypeExt on TariffProviderType {
  String get label => switch (this) {
        TariffProviderType.manual     => 'Tarif manuel',
        TariffProviderType.customJson => 'Fichier JSON custom',
        TariffProviderType.linkyTIC   => 'Linky TIC',
        TariffProviderType.tibberPro  => 'Tibber',
        TariffProviderType.octopusPro => 'Octopus',
        TariffProviderType.entsoe     => 'ENTSO-E',
        TariffProviderType.jsonRpc    => 'JSON-RPC externe',
      };
  bool get isPro => this == TariffProviderType.tibberPro ||
                    this == TariffProviderType.octopusPro ||
                    this == TariffProviderType.entsoe;
}

enum TariffMode {
  spotMarket,
  hchp,        // Heures Creuses / Heures Pleines
  tou,         // TOU contractuel
  fixed,
}

extension TariffModeExt on TariffMode {
  String get label => switch (this) {
        TariffMode.spotMarket => 'Spot Market',
        TariffMode.hchp       => 'Heures Creuses / Heures Pleines',
        TariffMode.tou        => 'TOU contractuel',
        TariffMode.fixed      => 'Tarif fixe',
      };
}

class HcHpConfig {
  final double offPeakPrice;  // €/kWh HC
  final double peakPrice;     // €/kWh HP
  final TimeOfDay offPeakStart;
  final TimeOfDay offPeakEnd;

  const HcHpConfig({
    this.offPeakPrice  = 0.096,
    this.peakPrice     = 0.146,
    this.offPeakStart  = const TimeOfDay(hour: 22, minute: 0),
    this.offPeakEnd    = const TimeOfDay(hour: 6, minute: 0),
  });

  HcHpConfig copyWith({
    double? offPeakPrice,
    double? peakPrice,
    TimeOfDay? offPeakStart,
    TimeOfDay? offPeakEnd,
  }) => HcHpConfig(
        offPeakPrice:  offPeakPrice  ?? this.offPeakPrice,
        peakPrice:     peakPrice     ?? this.peakPrice,
        offPeakStart:  offPeakStart  ?? this.offPeakStart,
        offPeakEnd:    offPeakEnd    ?? this.offPeakEnd,
      );
}

class CurrentPrices {
  final double now;
  final double inOneHour;
  final double min24h;
  final double max24h;
  final DateTime? minTime;
  final DateTime? maxTime;

  const CurrentPrices({
    this.now      = 0,
    this.inOneHour = 0,
    this.min24h   = 0,
    this.max24h   = 0,
    this.minTime,
    this.maxTime,
  });
}

/// Gère le provider tarifaire actif, le mode et les prix courants.
class TariffProvider extends ChangeNotifier {
  TariffProviderType _activeProvider = TariffProviderType.manual;
  TariffMode         _mode           = TariffMode.fixed;
  double             _manualPrice    = 0.25;   // €/kWh tarif manuel
  HcHpConfig         _hchp           = const HcHpConfig();
  CurrentPrices      _prices         = const CurrentPrices(
    now: 0.092, inOneHour: 0.085,
    min24h: 0.048, max24h: 0.182,
  );
  bool _loading = false;

  TariffProviderType get activeProvider => _activeProvider;
  TariffMode         get mode           => _mode;
  HcHpConfig         get hchp           => _hchp;
  CurrentPrices      get prices         => _prices;
  bool               get loading        => _loading;
  double             get manualPrice    => _manualPrice;

  Future<void> load() async {
    _loading = true;
    notifyListeners();
    await Future.delayed(const Duration(milliseconds: 200));
    _loading = false;
    notifyListeners();
    // TODO: charger depuis nymea RPC
  }

  void setProvider(TariffProviderType p) {
    _activeProvider = p; notifyListeners();
  }

  void setMode(TariffMode m) {
    _mode = m; notifyListeners();
  }

  void updateHcHp(HcHpConfig c) {
    _hchp = c; notifyListeners();
  }

  void setManualPrice(double price) {
    _manualPrice = price.clamp(0.001, 9.999);
    notifyListeners();
  }
}