// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
// vim: ts=8 sw=2 sts=2 expandtab

/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2012 Inktank Storage, Inc.
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software
 * Foundation.  See file COPYING.
 *
 */
#include "TextTable.h"

using namespace std;

void TextTable::define_column(const string &heading,
			      enum TextTable::Align hd_align,
			      enum TextTable::Align col_align)
{
  TextTableColumn def(heading, heading.length(), hd_align, col_align);
  col.push_back(def);
}

void TextTable::clear() {
  currow = 0;
  curcol = 0;
  indent = 0;
  row.clear();
  // reset widths to heading widths
  for (unsigned int i = 0; i < col.size(); i++)
    col[i].width = col[i].heading.size();
}

/**
 * Pad s with space to appropriate alignment
 *
 * @param s string to pad
 * @param width width of field to contain padded string
 * @param align desired alignment (LEFT, CENTER, RIGHT)
 *
 * @return padded string
 */
static string
pad(string s, int width, TextTable::Align align)
{
  int lpad, rpad;
  lpad = 0;
  rpad = 0;
  switch (align) {
    case TextTable::LEFT:
      rpad = width - s.length();
      break;
    case TextTable::CENTER:
      lpad = width / 2 - s.length() / 2;
      rpad = width - lpad - s.length();
      break;
    case TextTable::RIGHT:
      lpad = width - s.length();
      break;
  }

  return string(lpad, ' ') + s + string(rpad, ' ');
}

std::ostream &operator<<(std::ostream &out, const TextTable &t)
{
  for (unsigned int i = 0; i < t.col.size(); i++) {
    TextTable::TextTableColumn col = t.col[i];
    if (i) {
      out << t.column_separation;
    }
    out << string(t.indent, ' ')
        << pad(col.heading, col.width, col.hd_align);
  }
  out << endl;

  for (unsigned int i = 0; i < t.row.size(); i++) {
    for (unsigned int j = 0; j < t.row[i].size(); j++) {
      TextTable::TextTableColumn col = t.col[j];
      if (j) {
	out << t.column_separation;
      }
      out << string(t.indent, ' ')
	  << pad(t.row[i][j], col.width, col.col_align);
    }
    out << endl;
  }
  return out;
}
