var assert = require(“assert”),

_ = require("../");

assert = module.exports = Object.create(assert);

assert.isArray = function(actual, message) {

if (!Array.isArray(actual)) {
  assert.fail(actual, null, message || "expected {actual} to be an Array", null, assert.isArray);
}

};

assert.inDelta = function(actual, expected, delta, message) {

if (!inDelta(actual, expected, delta)) {
  assert.fail(actual, expected, message || "expected {actual} to be in within *" + delta + "* of {expected}", null, assert.inDelta);
}

};

assert.domNull = function(actual, message) {

if (actual != null) {
  assert.fail(actual+"", null, message || "expected null, got {actual}", "===", assert.domNull);
}

};

assert.domEqual = function(actual, expected, message) {

if (actual !== expected) {
  assert.fail(actual+"", expected+"", message || "expected {expected}, got {actual}", "===", assert.domEqual);
}

};

assert.rgbEqual = function(actual, r, g, b, message) {

var ar = Math.round(actual.r),
    ag = Math.round(actual.g),
    ab = Math.round(actual.b),
    er = Math.round(r),
    eg = Math.round(g),
    eb = Math.round(b);
if (ar !== er || ag !== eg || ab !== eb) {
  assert.fail(
    "rgb(" + ar + "," + ag + "," + ab + ")",
    "rgb(" + er + ", " + eg + ", " + eb + ")",
    message || "expected {expected}, got {actual}", "===", assert.rgbEqual);
}

};

assert.hslEqual = function(actual, h, s, l, message) {

var ah = _.round(actual.h, 2),
    as = _.round(actual.s, 2),
    al = _.round(actual.l, 2),
    eh = _.round(h, 2),
    es = _.round(s, 2),
    el = _.round(l, 2);
if ((!(isNaN(ah) && isNaN(eh)) && ah !== eh) || (!(isNaN(as) && isNaN(es)) && as !== es) || al !== el) {
  assert.fail(
    "hsl(" + ah + "," + as + "," + al + ")",
    "hsl(" + eh + "," + es + "," + el + ")",
    message || "expected {expected}, got {actual}", null, assert.hslEqual);
}

};

assert.hclEqual = function(actual, h, c, l, message) {

var ah = _.round(actual.h, 2),
    ac = _.round(actual.c, 2),
    al = _.round(actual.l, 2),
    eh = _.round(h, 2),
    ec = _.round(c, 2),
    el = _.round(l, 2);
if ((!(isNaN(ah) && isNaN(eh)) && ah !== eh) || ac !== ec || al !== el) {
  assert.fail(
    "hcl(" + ah + "," + ac + "," + al + ")",
    "hcl(" + eh + "," + ec + "," + el + ")",
    message || "expected {expected}, got {actual}", null, assert.hclEqual);
}

};

assert.labEqual = function(actual, l, a, b, message) {

var al = _.round(actual.l, 2),
    aa = _.round(actual.a, 2),
    ab = _.round(actual.b, 2),
    el = _.round(l, 2),
    ea = _.round(a, 2),
    eb = _.round(b, 2);
if (al !== el || aa !== ea || ab !== eb) {
  assert.fail(
    "lab(" + al + ", " + aa + ", " + ab + ")",
    "lab(" + el + ", " + ea + ", " + eb + ")",
    message || "expected {expected}, got {actual}", null, assert.labEqual);
}

};

assert.pathEqual = function(actual, expected, message) {

if (!pathEqual(actual, expected)) {
  assert.fail(formatPath(actual), formatPath(expected), message || "expected {expected}, got {actual}", null, assert.pathEqual);
}

};

function inDelta(actual, expected, delta) {

return (Array.isArray(expected) ? inDeltaArray : inDeltaNumber)(actual, expected, delta);

}

function inDeltaArray(actual, expected, delta) {

var n = expected.length, i = -1;
if (actual.length !== n) return false;
while (++i < n) if (!inDelta(actual[i], expected[i], delta)) return false;
return true;

}

function inDeltaNumber(actual, expected, delta) {

return actual >= expected - delta && actual <= expected + delta;

}

function pathEqual(a, b) {

a = parsePath(a);
b = parsePath(b);
var n = a.length, i = -1, x, y;
if (n !== b.length) return false;
while (++i < n) {
  x = a[i];
  y = b[i];
  if (typeof x === "string") {
    if (x !== y) return false;
  } else if (typeof y !== "number") {
    return false;
  } else if (Math.abs(x - y) > 1e-6) {
    return false;
  }
}
return true;

}

var reNumber = /[-+]?(?:d+.d+|d+.|.d+|d+)(?:[-]?d+)?/g;

function parsePath(path) {

var parts = [];
reNumber.lastIndex = 0;
for (var i = 0, s0 = 0, s1, m; m = reNumber.exec(path); ++i) {
  if (m.index) {
    var part = path.substring(s0, s1 = m.index);
    if (!/^[, ]$/.test(part)) parts.push(part);
  }
  parts.push(parseFloat(m[0]));
  s0 = reNumber.lastIndex;
}
if (s0 < path.length) parts.push(path.substring(s0));
return parts;

}

function formatPath(path) {

return path.replace(reNumber, formatNumber);

}

function formatNumber(s) {

return Math.abs((s = +s) - Math.floor(s)) < 1e-6 ? Math.floor(s) : s.toFixed(6);

}