#ifndef MODE_ENERGY_H
#define MODE_ENERGY_H

#include <patrix/core/mqtt.h>
#include "mode/Mode.h"

#define PHOTOVOLTAIC_ENERGY_KWH                                   "openDTU/pv/ac/yieldtotal"
#define GRID_IMPORT_WH                                            "electricity/grid/energy/import/wh"
#define GRID_EXPORT_WH                                            "electricity/grid/energy/export/wh"

#define POWER_PHOTOVOLTAIC_photovoltaicEnergyKWh_BEFORE_METER_CHANGE           287.995
#define PV_COST_TOTAL_EURO                                        576.52
#define GRID_KWH_EURO                                             0.33
#define PV_COST_AMORTISATION_KWH                                  ( PV_COST_TOTAL_EURO / GRID_KWH_EURO )

class Energy final : public Mode {

  double photovoltaicEnergyKWh = NAN;

  unsigned long photovoltaicEnergyKWhLast = 0;

  double gridImportKWh = NAN;

  unsigned long gridImportKWhLast = 0;

  double gridExportKWh = NAN;

  unsigned long gridExportKWhLast = 0;

  int page = 0;

public:

  explicit Energy(Display& display) : Mode(display) {
    timer(0, 7000);
  }

  const char *getName() override {
    return "Energy";
  }

  void start() override {
    mqttSubscribe(PHOTOVOLTAIC_ENERGY_KWH);
    mqttSubscribe(GRID_IMPORT_WH);
    mqttSubscribe(GRID_EXPORT_WH);
  }

  void stop() override {
    mqttUnsubscribe(PHOTOVOLTAIC_ENERGY_KWH);
    mqttUnsubscribe(GRID_IMPORT_WH);
    mqttUnsubscribe(GRID_EXPORT_WH);
  }

protected:

  void tick(uint8_t index, microseconds_t microseconds) override {
    page = (page + 1) % 3;
  }

  void step(microseconds_t microseconds) override {
    if (realtimeChanged) {
      markDirty();
    }
  }

  void draw(Display& display) override {
    const auto photovoltaicEnergyKWhAfterMeterChange = photovoltaicEnergyKWh - POWER_PHOTOVOLTAIC_photovoltaicEnergyKWh_BEFORE_METER_CHANGE;
    const auto selfAfterMeterChange = photovoltaicEnergyKWhAfterMeterChange - gridExportKWh;
    const auto selfRatio = selfAfterMeterChange / photovoltaicEnergyKWhAfterMeterChange;
    const auto selfConsumedKWh = selfRatio * photovoltaicEnergyKWh;
    const auto costSaved = selfConsumedKWh * GRID_KWH_EURO;
    const auto amortisationPercent = selfConsumedKWh / PV_COST_AMORTISATION_KWH * 100;

    display.clear();
    display.cursorX = 0;
    display.cursorY = 1;
    if (page == 0) {
      display.foreground = Green;
      display.printf("%3.0f€", costSaved);
      display.foreground = White;
      display.printf("   %3.0f%%", amortisationPercent);
    } else if (page == 1) {
      display.foreground = Blue;
      display.printf("%3.0f", photovoltaicEnergyKWh);
      display.foreground = Green;
      display.printf("   %3.0f", selfConsumedKWh);
    } else {
      display.foreground = Yellow;
      display.printf("%4.0f", gridImportKWh);
      display.foreground = Magenta;
      display.printf("   %3.0f", gridExportKWh);
    }
  }

};

#endif