import “../arrays/map”; import “../core/identity”; import “format-localized”; import “formatPrefix”; import “round”;

d3.format = function(specifier) {

var match = d3_format_re.exec(specifier),
    fill = match[1] || " ",
    align = match[2] || ">",
    sign = match[3] || "",
    symbol = match[4] || "",
    zfill = match[5],
    width = +match[6],
    comma = match[7],
    precision = match[8],
    type = match[9],
    scale = 1,
    suffix = "",
    integer = false;

if (precision) precision = +precision.substring(1);

if (zfill || fill === "0" && align === "=") {
  zfill = fill = "0";
  align = "=";
  if (comma) width -= Math.floor((width - 1) / 4);
}

switch (type) {
  case "n": comma = true; type = "g"; break;
  case "%": scale = 100; suffix = "%"; type = "f"; break;
  case "p": scale = 100; suffix = "%"; type = "r"; break;
  case "b":
  case "o":
  case "x":
  case "X": if (symbol === "#") symbol = "0" + type.toLowerCase();
  case "c":
  case "d": integer = true; precision = 0; break;
  case "s": scale = -1; type = "r"; break;
}

if (symbol === "#") symbol = "";
else if (symbol === "$") symbol = d3_format_currencySymbol;

// If no precision is specified for r, fallback to general notation.
if (type == "r" && !precision) type = "g";

// Ensure that the requested precision is in the supported range.
if (precision != null) {
  if (type == "g") precision = Math.max(1, Math.min(21, precision));
  else if (type == "e" || type == "f") precision = Math.max(0, Math.min(20, precision));
}

type = d3_format_types.get(type) || d3_format_typeDefault;

var zcomma = zfill && comma;

return function(value) {

  // Return the empty string for floats formatted as ints.
  if (integer && (value % 1)) return "";

  // Convert negative to positive, and record the sign prefix.
  var negative = value < 0 || value === 0 && 1 / value < 0 ? (value = -value, "-") : sign;

  // Apply the scale, computing it from the value's exponent for si format.
  if (scale < 0) {
    var prefix = d3.formatPrefix(value, precision);
    value = prefix.scale(value);
    suffix = prefix.symbol;
  } else {
    value *= scale;
  }

  // Convert to the desired precision.
  value = type(value, precision);

  // Break the value into the integer part (before) and decimal part (after).
  var i = value.lastIndexOf("."),
      before = i < 0 ? value : value.substring(0, i),
      after = i < 0 ? "" : d3_format_decimalPoint + value.substring(i + 1);

   // If the fill character is not "0", grouping is applied before padding.
  if (!zfill && comma) before = d3_format_group(before);

  var length = symbol.length + before.length + after.length + (zcomma ? 0 : negative.length),
      padding = length < width ? new Array(length = width - length + 1).join(fill) : "";

  // If the fill character is "0", grouping is applied after padding.
  if (zcomma) before = d3_format_group(padding + before);

  // Apply symbol as prefix. TODO allow suffix symbols
  negative += symbol;

  // Rejoin integer and decimal parts.
  value = before + after;

  return (align === "<" ? negative + value + padding
        : align === ">" ? padding + negative + value
        : align === "^" ? padding.substring(0, length >>= 1) + negative + value + padding.substring(length)
        : negative + (zcomma ? value : padding + value)) + suffix;
};

};

// [[fill]align][symbol][width][.precision] var d3_format_re = /(?:([^{])?([<>=^]))?([+- ])?([$#])?(0)?(d+)?(,)?(.-?d+)?()?/i;

var d3_format_types = d3.map({

b: function(x) { return x.toString(2); },
c: function(x) { return String.fromCharCode(x); },
o: function(x) { return x.toString(8); },
x: function(x) { return x.toString(16); },
X: function(x) { return x.toString(16).toUpperCase(); },
g: function(x, p) { return x.toPrecision(p); },
e: function(x, p) { return x.toExponential(p); },
f: function(x, p) { return x.toFixed(p); },
r: function(x, p) { return (x = d3.round(x, d3_format_precision(x, p))).toFixed(Math.max(0, Math.min(20, d3_format_precision(x * (1 + 1e-15), p)))); }

});

function d3_format_precision(x, p) {

return p - (x ? Math.ceil(Math.log(x) / Math.LN10) : 1);

}

function d3_format_typeDefault(x) {

return x + "";

}

// Apply comma grouping for thousands. var d3_format_group = d3_identity; if (d3_format_grouping) {

var d3_format_groupingLength = d3_format_grouping.length;
d3_format_group = function(value) {
  var i = value.length,
      t = [],
      j = 0,
      g = d3_format_grouping[0];
  while (i > 0 && g > 0) {
    t.push(value.substring(i -= g, i + g));
    g = d3_format_grouping[j = (j + 1) % d3_format_groupingLength];
  }
  return t.reverse().join(d3_format_thousandsSeparator);
};

}