#include "gui/common/NamedField.hpp"
#include "gui/containers/ConfigItem.hpp"
#include "main.h"
#include <cstdint>
#include <gui/vehicleconfig_screen/VehicleConfigView.hpp>

VehicleConfigView::VehicleConfigView() : selectedParam{0} {}

void VehicleConfigView::setupScreen() {
  VehicleConfigViewBase::setupScreen();
  params.setNumberOfItems(ParamFieldType_COUNT);
}

void VehicleConfigView::tearDownScreen() {
  VehicleConfigViewBase::tearDownScreen();
}

void VehicleConfigView::paramsUpdateItem(ConfigItem &item, int16_t itemIndex) {
  item.setType(static_cast<ParamFieldType>(itemIndex));
  item.setSelected(itemIndex == selectedParam);
}

void VehicleConfigView::selectPrevParam() {
  if (selectedParam == 0) {
    updateSelectedParam(ParamFieldType_COUNT - 1);
  } else {
    updateSelectedParam(selectedParam - 1);
  }
}

void VehicleConfigView::selectNextParam() {
  updateSelectedParam((selectedParam + 1) % ParamFieldType_COUNT);
}

void VehicleConfigView::decParam() {
  // TODO: How to handle this for different parameter types?
}
void VehicleConfigView::incParam() {
  // TODO: How to handle this for different parameter types?
}

void VehicleConfigView::confirmParam() {
  // TODO: How to handle this for different parameter types?
}

void VehicleConfigView::updateSelectedParam(int select) {
  int previousSelected = selectedParam;
  selectedParam = select;
  params.itemChanged(previousSelected);
  params.itemChanged(selectedParam);

  ConfigItem *firstItem = nullptr;
  int16_t firstY = INT16_MAX;
  ConfigItem *lastItem = nullptr;
  int16_t lastY = INT16_MIN;
  for (int16_t i = 0; i < paramsListItems.getNumberOfDrawables(); ++i) {
    ConfigItem *item =
        static_cast<ConfigItem *>(paramsListItems.getDrawable(i));
    int16_t y = item->getY();
    if (y + item->getHeight() > params.getHeight() || y < 0) {
      continue;
    }
    if (y < firstY) {
      firstY = y;
      firstItem = item;
    }
    if (y > lastY) {
      lastY = y;
      lastItem = item;
    }
  }

  int16_t firstVisible = firstItem->getType();
  int16_t lastVisible = lastItem->getType();
  if (lastVisible < firstVisible) {
    Error_Handler();
  }
  int16_t numVisible = lastVisible - firstVisible + 1;
  if (selectedParam >= firstVisible && selectedParam <= lastVisible) {
    return;
  }

  int16_t firstWanted;
  if (selectedParam == 0 && previousSelected == ParamFieldType_COUNT - 1) {
    firstWanted = 0;
  } else if (selectedParam > previousSelected) {
    firstWanted = selectedParam - numVisible + 1;
  } else {
    firstWanted = selectedParam;
  }
  if (firstWanted < 0) {
    firstWanted = 0;
  } else if (firstWanted > ParamFieldType_COUNT - 1) {
    firstWanted = ParamFieldType_COUNT - 1;
  }
  params.animateToItem(firstWanted, 0);
}