/*
 * This file is part of the "bluetoothheater" distribution 
 * (https://gitlab.com/mrjones.id.au/bluetoothheater) 
 *
 * Copyright (C) 2018  Ray Jones <ray@mrjones.id.au>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * 
 */

#include "128x64OLED.h"
#include "HeaterSettingsScreen.h"
#include "KeyPad.h"
#include "../Protocol/helpers.h"
#include "../Utility/UtilClasses.h"

///////////////////////////////////////////////////////////////////////////
//
// CHeaterSettingsScreen
//
// This screen provides a basic control function
//
///////////////////////////////////////////////////////////////////////////

static const int Line3 = 14;
static const int Line2 = 27;
static const int Line1 = 40;
static const int Column = 96;

static const int plugPowers[] = { 35, 40, 45, 80, 85, 90};

CHeaterSettingsScreen::CHeaterSettingsScreen(C128x64_OLED& display, CScreenManager& mgr) : CPasswordScreen(display, mgr) 
{
  _initUI();
  _fanSensor = 1;
  _glowDrive = 5;
  _sysVoltage = 12;
}

void 
CHeaterSettingsScreen::onSelect()
{
  CPasswordScreen::onSelect();
  _initUI();
  _fanSensor = getHeaterInfo().getFan_Sensor();
  _glowDrive = getHeaterInfo().getGlow_Drive();
  _sysVoltage = int(getHeaterInfo().getSystemVoltage());
}

void
CHeaterSettingsScreen::_initUI()
{
  _rowSel = 0;
  _animateCount = 0;
}

bool 
CHeaterSettingsScreen::show()
{
  char msg[20];
  _display.clearDisplay();

  if(!CPasswordScreen::show()) {  // for showing "saving settings"

    if(_rowSel == 4) {
      _printInverted(_display.xCentre(), 0, " Saving Settings ", true, eCentreJustify);
      _printMenuText(_display.xCentre(), 35, "Press UP to", false, eCentreJustify);
      _printMenuText(_display.xCentre(), 43, "confirm save", false, eCentreJustify);
    }
    else {
      _printInverted(_display.xCentre(), 0, " Heater Settings ", true, eCentreJustify);
      _printMenuText(97, Line3, "System voltage:", false, eRightJustify);
      _printMenuText(97, Line2, "Fan sensor:", false, eRightJustify);
      _printMenuText(97, Line1, "Glowplug power:", false, eRightJustify);
      sprintf(msg, "%dV", _sysVoltage);
      _printMenuText(Column, Line3, msg, _rowSel == 3);
      // navigation line
      int yPos = 53;
      int xPos = _display.xCentre();
      _printMenuText(xPos, yPos, "<-    exit    ->", _rowSel == 0, eCentreJustify);
    }
  }

  return true;
}


bool 
CHeaterSettingsScreen::animate()
{ 
  char msg[16];

  CPasswordScreen::animate();

  if(isPasswordBusy() || (_rowSel == 4)) {  // Password screen activity
    _printMenuText(Column, Line2, "    ");
    _printMenuText(Column, Line1, "    ");
    if(_rowSel == 4)
      _printMenuText(_display.xCentre(), 43, "confirm save", false, eCentreJustify);
  }
  else {
    _animateCount++;
    ROLLUPPERLIMIT(_animateCount, 9, 0);

    if(_rowSel == 1) {
      _display.drawRect(Column-border, Line1-border, 34, 8+2*border, BLACK);
      _display.drawRoundRect(Column-border, Line1-border, 34, 8+2*border, radius, WHITE);
    }
    else {
      _printMenuText(Column, Line1, "     ");
    }

    if(_animateCount < 4) 
      sprintf(msg, "PF-%d ", _glowDrive);
    else
      sprintf(msg, "(%dW)", plugPowers[_glowDrive-1]);
    _printMenuText(Column, Line1, msg);

    int xPos = Column;
    _printMenuText(xPos, Line2, "    ", _rowSel == 2); // erase, but create selection loop
    if(_animateCount < 4) {
      sprintf(msg, "SN-%d", _fanSensor);
      _printMenuText(Column, Line2, msg);
    }
    else {
      _printMenuText(xPos, Line2, "(");
      xPos += 6;
      //                                     .
      // draw old fashioned divide symbol  -----
      //                                     .
      int barOfs = 3;
      _display.drawLine(xPos, Line2+barOfs, xPos+4, Line2+barOfs, WHITE);
      _display.drawPixel(xPos+2, Line2+barOfs-2, WHITE);
      _display.drawPixel(xPos+2, Line2+barOfs+2, WHITE);
      xPos += 6;
      sprintf(msg, "%d)", _fanSensor);
      _printMenuText(xPos, Line2, msg);
    }
  }
  return true;
}


bool 
CHeaterSettingsScreen::keyHandler(uint8_t event)
{
  if(event & keyPressed) {
    // press LEFT to select previous screen
    if(event & key_Left) {
      switch(_rowSel) {
        case 0:
          _ScreenManager.prevMenu();
          break;
        case 1:
        case 2:
        case 3:
          _adjust(-1);
          break;
        case 4:
          _rowSel = 0;   // abort save
          break;
      }
    }
    // press RIGHT to select next screen
    if(event & key_Right) {
      switch(_rowSel) {
        case 0:
          _ScreenManager.nextMenu();
          break;
        case 1:
        case 2:
        case 3:
          _adjust(+1);
          break;
        case 4:
          _rowSel = 0;   // abort save
          break;
      }
    }
    if(event & key_Down) {
      _rowSel--;
      LOWERLIMIT(_rowSel, 0);
    }
    // UP press
    if(event & key_Up) {
      switch(_rowSel) {
        case 0:
        case 1:
        case 2:
        case 3:
          _rowSel++;
          UPPERLIMIT(_rowSel, 3);
          break;
        case 4:    // confirmed save
          _showStoringMessage();
          setSystemVoltage(float(_sysVoltage));
          setFanSensor(_fanSensor);
          setGlowDrive(_glowDrive);
          saveNV();
          _rowSel = 0;
          break;
      }
    }
    // CENTRE press
    if(event & key_Centre) {
      switch(_rowSel) {
        case 0:
          _ScreenManager.selectMenu(CScreenManager::RootMenuLoop);
          break;
        case 1:
        case 2:
        case 3:
          _rowSel = 4;
          break;
      }
    }
    _ScreenManager.reqUpdate();
  }

  return true;
}

void 
CHeaterSettingsScreen::_adjust(int dir)
{
  switch(_rowSel) {
    case 1:   // glow power
      _glowDrive += dir;
      UPPERLIMIT(_glowDrive, 6);
      LOWERLIMIT(_glowDrive, 1);
      break;
    case 2:   // fan sensor
      _fanSensor = (_fanSensor == 1) ? 2 : 1;
      break;
    case 3:   // system voltage
      _sysVoltage = (_sysVoltage == 12) ? 24 : 12;
      break;
  }
}