#include "toonz/columnfan.h"

// TnzCore includes
#include "tstream.h"

// STD includss
#include <assert.h>

//=============================================================================

const int colWidth = 74;
const int colSkip  = 9;

//=============================================================================
// ColumnFan

ColumnFan::ColumnFan() : m_firstFreePos(0) {}

//-----------------------------------------------------------------------------

void ColumnFan::update() {
  int lastPos     = -colWidth;
  bool lastActive = true;
  int m           = m_columns.size();
  int i;
  for (i = 0; i < m; i++) {
    bool active = m_columns[i].m_active;
    if (lastActive)
      lastPos += colWidth;
    else if (active)
      lastPos += colSkip;
    m_columns[i].m_pos = lastPos;
    lastActive         = active;
  }
  m_firstFreePos = lastPos + (lastActive ? colWidth : colSkip);
  m_table.clear();
  for (i = 0; i < m; i++)
    if (m_columns[i].m_active)
      m_table[m_columns[i].m_pos + colWidth - 1] = i;
    else if (i + 1 < m && m_columns[i + 1].m_active)
      m_table[m_columns[i + 1].m_pos - 1] = i;
    else if (i + 1 == m)
      m_table[m_firstFreePos - 1] = i;
}

//-----------------------------------------------------------------------------

int ColumnFan::xToCol(int x) const {
  if (x < m_firstFreePos) {
    std::map<int, int>::const_iterator it = m_table.lower_bound(x);
    if (it == m_table.end()) return -3;
    assert(it != m_table.end());
    return it->second;
  } else
    return m_columns.size() + (x - m_firstFreePos) / colWidth;
}

//-----------------------------------------------------------------------------

int ColumnFan::colToX(int col) const {
  int m = m_columns.size();
  if (col >= 0 && col < m)
    return m_columns[col].m_pos;
  else
    return m_firstFreePos + (col - m) * colWidth;
}

//-----------------------------------------------------------------------------

void ColumnFan::activate(int col) {
  int m = m_columns.size();
  if (col < m) {
    m_columns[col].m_active = true;
    int i;
    for (i = m - 1; i >= 0 && m_columns[i].m_active; i--) {
    }
    i++;
    if (i < m) {
      m = i;
      m_columns.erase(m_columns.begin() + i, m_columns.end());
    }
  }
  update();
}

//-----------------------------------------------------------------------------

void ColumnFan::deactivate(int col) {
  while ((int)m_columns.size() <= col) m_columns.push_back(Column());
  m_columns[col].m_active = false;
  update();
}

//-----------------------------------------------------------------------------

bool ColumnFan::isActive(int col) const {
  return 0 <= col && col < (int)m_columns.size() ? m_columns[col].m_active
                                                 : true;
}

//-----------------------------------------------------------------------------

bool ColumnFan::isEmpty() const { return m_columns.empty(); }

//-----------------------------------------------------------------------------

void ColumnFan::saveData(TOStream &os) {
  int index, n = (int)m_columns.size();
  for (index = 0; index < n;) {
    while (index < n && m_columns[index].m_active) index++;
    if (index < n) {
      int firstIndex = index;
      os << index;
      index++;
      while (index < n && !m_columns[index].m_active) index++;
      os << index - firstIndex;
    }
  }
}

//-----------------------------------------------------------------------------

void ColumnFan::loadData(TIStream &is) {
  m_columns.clear();
  m_table.clear();
  m_firstFreePos = 0;
  while (!is.eos()) {
    int index = 0, count = 0;
    is >> index >> count;
    int j;
    for (j = 0; j < count; j++) deactivate(index + j);
  }
}