#include "calculation_controller.h"
#include "../shared/poincare_helpers.h"
#include <poincare/preferences.h>
#include <apps/i18n.h>
#include <assert.h>

using namespace Shared;
using namespace Poincare;

namespace Statistics {

CalculationController::CalculationController(Responder * parentResponder, ButtonRowController * header, Store * store) :
  TabTableController(parentResponder),
  ButtonRowDelegate(header, nullptr),
  m_selectableTableView(this, this, this),
  m_seriesTitleCells{},
  m_calculationTitleCells{},
  m_calculationCells{},
  m_hideableCell(),
  m_store(store)
{
  m_selectableTableView.setBackgroundColor(Palette::WallScreenDark);
  m_selectableTableView.setVerticalCellOverlap(0);
  m_selectableTableView.setMargins(k_margin, k_scrollBarMargin, k_scrollBarMargin, k_margin);
  for (int i = 0; i < k_numberOfSeriesTitleCells; i++) {
    m_seriesTitleCells[i].setSeparatorLeft(true);
  }
  for (int i = 0; i < k_numberOfCalculationTitleCells; i++) {
    m_calculationTitleCells[i].setAlignment(1.0f, 0.5f);
    m_calculationTitleCells[i].setMessageFont(KDFont::SmallFont);
  }
  for (int i = 0; i < k_numberOfCalculationCells; i++) {
    m_calculationCells[i].setTextColor(Palette::GreyDark);
  }
  m_hideableCell.setHide(true);
}

// AlternateEmptyViewDefaultDelegate

bool CalculationController::isEmpty() const {
  return m_store->isEmpty();
}

I18n::Message CalculationController::emptyMessage() {
  return I18n::Message::NoValueToCompute;
}

Responder * CalculationController::defaultController() {
  return tabController();
}

// TableViewDataSource

int CalculationController::numberOfColumns() const {
  return 1 + m_store->numberOfNonEmptySeries();
}

void CalculationController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
  EvenOddCell * evenOddCell = (EvenOddCell *)cell;
  evenOddCell->setEven(j%2 == 0);
  evenOddCell->setHighlighted(i == selectedColumn() && j == selectedRow());
  if (i == 0 && j == 0) {
    return;
  }
  if (j == 0) {
    // Display a series title cell
    int seriesNumber = m_store->indexOfKthNonEmptySeries(i-1);
    char titleBuffer[] = {'V', static_cast<char>('1'+seriesNumber), '/', 'N', static_cast<char>('1'+seriesNumber), 0};
    StoreTitleCell * storeTitleCell = static_cast<StoreTitleCell *>(cell);
    storeTitleCell->setText(titleBuffer);
    storeTitleCell->setColor(DoublePairStore::colorOfSeriesAtIndex(seriesNumber));
    return;
  }
  if (i == 0) {
    // Display a calculation title cell
    I18n::Message titles[k_totalNumberOfRows] = {
      I18n::Message::TotalSize,
      I18n::Message::Minimum,
      I18n::Message::Maximum,
      I18n::Message::Range,
      I18n::Message::Mean,
      I18n::Message::StandardDeviationSigma,
      I18n::Message::Deviation,
      I18n::Message::FirstQuartile,
      I18n::Message::ThirdQuartile,
      I18n::Message::Median,
      I18n::Message::InterquartileRange,
      I18n::Message::Sum,
      I18n::Message::SquareSum,
      I18n::Message::SampleStandardDeviationS};
    EvenOddMessageTextCell * calcTitleCell = static_cast<EvenOddMessageTextCell *>(cell);
    calcTitleCell->setMessage(titles[j-1]);
    return;
  }
  // Display a calculation cell
  CalculPointer calculationMethods[k_totalNumberOfRows] = {&Store::sumOfOccurrences, &Store::minValue,
    &Store::maxValue, &Store::range, &Store::mean, &Store::standardDeviation, &Store::variance, &Store::firstQuartile,
    &Store::thirdQuartile, &Store::median, &Store::quartileRange, &Store::sum, &Store::squaredValueSum, &Store::sampleStandardDeviation};
  int seriesIndex = m_store->indexOfKthNonEmptySeries(i-1);
  double calculation = (m_store->*calculationMethods[j-1])(seriesIndex);
  EvenOddBufferTextCell * calculationCell = static_cast<EvenOddBufferTextCell *>(cell);
  constexpr int precision = Preferences::LargeNumberOfSignificantDigits;
  constexpr int bufferSize = PrintFloat::charSizeForFloatsWithPrecision(precision);
  char buffer[bufferSize];
  PoincareHelpers::ConvertFloatToText<double>(calculation, buffer, bufferSize, precision);
  calculationCell->setText(buffer);
}

KDCoordinate CalculationController::columnWidth(int i) {
  return i == 0 ? k_calculationTitleCellWidth : k_calculationCellWidth;
}

KDCoordinate CalculationController::cumulatedHeightFromIndex(int j) {
  return j*rowHeight(0);
}

int CalculationController::indexFromCumulatedHeight(KDCoordinate offsetY) {
  return (offsetY-1) / rowHeight(0);
}

HighlightCell * CalculationController::reusableCell(int index, int type) {
  assert(index >= 0 && index < reusableCellCount(type));
  if (type == k_hideableCellType) {
    return &m_hideableCell;
  }
  if (type == k_calculationTitleCellType) {
    return &m_calculationTitleCells[index];
  }
  if (type == k_seriesTitleCellType) {
    return &m_seriesTitleCells[index];
  }
  assert(type == k_calculationCellType);
  return &m_calculationCells[index];
}

int CalculationController::reusableCellCount(int type) {
  if (type == k_hideableCellType) {
    return 1;
  }
  if (type == k_calculationTitleCellType) {
    return k_numberOfCalculationTitleCells;
  }
  if (type == k_seriesTitleCellType) {
    return k_numberOfSeriesTitleCells;
  }
  assert(type == k_calculationCellType);
  return k_numberOfCalculationCells;
}

int CalculationController::typeAtLocation(int i, int j) {
  assert(i >= 0 && i < numberOfColumns());
  assert(j >= 0 && j < numberOfRows());
  if (i == 0 && j == 0) {
    return k_hideableCellType;
  }
  if (i == 0) {
    return k_calculationTitleCellType;
  }
  if (j == 0) {
    return k_seriesTitleCellType;
  }
  return k_calculationCellType;
}

// ViewController
const char * CalculationController::title() {
  return I18n::translate(I18n::Message::StatTab);
}

// Responder
bool CalculationController::handleEvent(Ion::Events::Event event) {
  if (event == Ion::Events::Up) {
    selectableTableView()->deselectTable();
    Container::activeApp()->setFirstResponder(tabController());
    return true;
  }
  return false;
}

void CalculationController::didBecomeFirstResponder() {
  if (selectedRow() == -1) {
    selectCellAtLocation(0, 1);
  } else {
    selectCellAtLocation(selectedColumn(), selectedRow());
  }
  TabTableController::didBecomeFirstResponder();
}

// Private

Responder * CalculationController::tabController() const {
  return (parentResponder()->parentResponder()->parentResponder());
}

}

