/*
Unit testing library for the OpenGL ES 2.0 HTML Canvas context

Copyright (C) 2011  Ilmari Heikkinen <ilmari.heikkinen@gmail.com>

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/
Tests = {
  autorun : true,
  message : null,
  delay : 0,

  startUnit : function(){ return []; },
  setup : function() { return arguments; },
  teardown : function() {},
  endUnit : function() {}
}

var __testSuccess__ = true;
var __testFailCount__ = 0;
var __testLog__;
var __backlog__ = [];

Object.toSource = function(a, seen){
  if (a == null) return "null";
  if (typeof a == 'boolean') return a ? "true" : "false";
  if (typeof a == 'string') return '"' + a.replace(/"/g, '\\"') + '"';
  if (a instanceof HTMLElement) return a.toString();
  if (a.width && a.height && a.data) return "[ImageData]";
  if (a instanceof Array) {
    if (!seen) seen = [];
    var idx = seen.indexOf(a);
    if (idx != -1) return '#'+(idx+1)+'#';
    seen.unshift(a);
    var srcs = a.map(function(o){ return Object.toSource(o,seen) });
    var prefix = '';
    idx = seen.indexOf(a);
    if (idx != -1) prefix = '#'+(idx+1)+'=';
    return prefix + '[' + srcs.join(", ") + ']';
  }
  if (typeof a == 'object') {
    if (!seen) seen = [];
    var idx = seen.indexOf(a);
    if (idx != -1) return '#'+(idx+1)+'#';
    seen.unshift(a);
    var members = [];
    var name;
    try {
      for (var i in a) {
        if (i.search(/^[a-zA-Z0-9]+$/) != -1)
          name = i;
        else
          name = '"' + i.replace(/"/g, '\\"') + '"';
        var ai;
        try { ai = a[i]; }
        catch(e) { ai = 'null /*ERROR_ACCESSING*/'; }
        var s = name + ':' + Object.toSource(ai, seen);
        members.push(s);
      }
    } catch (e) {}
    var prefix = '';
    idx = seen.indexOf(a);
    if (idx != -1) prefix = '#'+(idx+1)+'=';
    return prefix + '{' + members.join(", ") + '}'
  }
  if (typeof a == 'function')
    return '('+a.toString().replace(/\n/g, " ").replace(/\s+/g, " ")+')';
  return a.toString();
}

function formatError(e) {
  if (window.console) console.log(e);
  var pathSegs = location.href.toString().split("/");
  var currentDoc = e.lineNumber != null ? pathSegs[pathSegs.length - 1] : null;
  var trace = (e.filename || currentDoc) + ":" + e.lineNumber + (e.trace ? "\n"+e.trace : "");
  return e.message + "\n" + trace;
}

function runTests() {
  var h = document.getElementById('test-status');
  if (h == null) {
    h = document.createElement('h1');
    h.id = 'test-status';
    document.body.appendChild(h);
  }
  h.textContent = "";
  var log = document.getElementById('test-log');
  if (log == null) {
    log = document.createElement('div');
    log.id = 'test-log';
    document.body.appendChild(log);
  }
  while (log.childNodes.length > 0)
    log.removeChild(log.firstChild);

  var setup_args = [];

  if (Tests.startUnit != null) {
    __testLog__ = document.createElement('div');
    try {
      setup_args = Tests.startUnit();
      if (__testLog__.childNodes.length > 0)
        log.appendChild(__testLog__);
    } catch(e) {
      testFailed("startUnit", formatError(e));
      log.appendChild(__testLog__);
      printTestStatus();
      return;
    }
  }

  var testsRun = false;
  var allTestsSuccessful = true;

  for (var i in Tests) {
    if (i.substring(0,4) != "test") continue;
    __testLog__ = document.createElement('div');
    __testSuccess__ = true;
    try {
      doTestNotify (i);
      var args = setup_args;
      if (Tests.setup != null)
        args = Tests.setup.apply(Tests, setup_args);
      Tests[i].apply(Tests, args);
      if (Tests.teardown != null)
        Tests.teardown.apply(Tests, args);
    }
    catch (e) {
      testFailed(i, e.name, formatError(e));
    }
    if (__testSuccess__ == false) {
      ++__testFailCount__;
    }
    var h = document.createElement('h2');
    h.textContent = i;
    __testLog__.insertBefore(h, __testLog__.firstChild);
    log.appendChild(__testLog__);
    allTestsSuccessful = allTestsSuccessful && __testSuccess__ == true;
    reportTestResultsToHarness(__testSuccess__, i);
    doTestNotify (i+"--"+(__testSuccess__?"OK":"FAIL"));
    testsRun = true;
  }

  printTestStatus(testsRun);
  if (Tests.endUnit != null) {
    __testLog__ = document.createElement('div');
    try {
      Tests.endUnit.apply(Tests, setup_args);
      if (__testLog__.childNodes.length > 0)
        log.appendChild(__testLog__);
    } catch(e) {
      testFailed("endUnit", e.name, formatError(e));
      log.appendChild(__testLog__);
    }
  }
  notifyFinishedToHarness(allTestsSuccessful, "finished tests");
}

function doTestNotify(name) {
  //try {
  //  var xhr = new XMLHttpRequest();
  //  xhr.open("GET", "http://localhost:8888/"+name, true);
  //  xhr.send(null);
  //} catch(e) {}
}

function testFailed(assertName, name) {
  var d = document.createElement('div');
  var h = document.createElement('h3');
  var d1 = document.createElement("span");
  h.appendChild(d1);
  d1.appendChild(document.createTextNode("FAIL: "));
  d1.style.color = "red";
  h.appendChild(document.createTextNode(
      name==null ? assertName : name + " (in " + assertName + ")"));
  d.appendChild(h);
  var args = []
  for (var i=2; i<arguments.length; i++) {
    var a = arguments[i];
    var p = document.createElement('p');
    p.style.whiteSpace = 'pre';
    p.textContent = (a == null) ? "null" :
                    (typeof a == 'boolean' || typeof a == 'string') ? a : Object.toSource(a);
    args.push(p.textContent);
    d.appendChild(p);
  }
  __testLog__.appendChild(d);
  __testSuccess__ = false;
  doTestNotify([assertName, name].concat(args).join("--"));
}

function testPassed(assertName, name) {
  var d = document.createElement('div');
  var h = document.createElement('h3');
  var d1 = document.createElement("span");
  h.appendChild(d1);
  d1.appendChild(document.createTextNode("PASS: "));
  d1.style.color = "green";
  h.appendChild(document.createTextNode(
      name==null ? assertName : name + " (in " + assertName + ")"));
  d.appendChild(h);
  var args = []
  for (var i=2; i<arguments.length; i++) {
    var a = arguments[i];
    var p = document.createElement('p');
    p.style.whiteSpace = 'pre';
    p.textContent = (a == null) ? "null" :
                    (typeof a == 'boolean' || typeof a == 'string') ? a : Object.toSource(a);
    args.push(p.textContent);
    d.appendChild(p);
  }
  __testLog__.appendChild(d);
  doTestNotify([assertName, name].concat(args).join("--"));
}

function checkTestSuccess() {
  return __testFailCount__ == 0;
}

window.addEventListener('load', function(){
  for (var i=0; i<__backlog__.length; i++)
    log(__backlog__[i]);
}, false);

function log(msg) {
  var p = document.createElement('p');
  var a = [];
  for (var i=0; i<arguments.length; i++)
    a.push(arguments[i]);
  p.textContent = a.join(", ");
  if (!__testLog__) {
    if (document.body)
      document.body.appendChild(p);
    else
      __backlog__.push(msg);
  } else {
    __testLog__.appendChild(p);
  }
}

function printTestStatus(testsRun) {
  var status = document.getElementById('test-status');
  if (testsRun) {
    status.className = checkTestSuccess() ? 'ok' : 'fail';
    status.textContent = checkTestSuccess() ? "PASS" : "FAIL";
  } else {
    status.className = 'fail';
    status.textContent = "NO TESTS FOUND";
  }
}

function assertFail(name, f) {
  if (f == null) { f = name; name = null; }
  var r = false;
  try { f(); } catch(e) { r=true; }
  if (!r) {
    testFailed("assertFail", name, f);
    return false;
  } else {
    testPassed("assertFail", name, f);
    return true;
  }
}

function assertOk(name, f) {
  if (f == null) { f = name; name = null; }
  var r = false;
  var err;
  try { f(); r=true; } catch(e) { err = e; }
  if (!r) {
    testFailed("assertOk", name, f, err.toString());
    return false;
  } else {
    testPassed("assertOk", name, f);
    return true;
  }
}

function assert(name, v) {
  if (v == null) { v = name; name = null; }
  if (!v) {
    testFailed("assert", name, v);
    return false;
  } else {
    testPassed("assert", name, v);
    return true;
  }
}

function assertProperty(name, v, p) {
  if (p == null) { p = v; v = name; name = p; }
  if (v[p] == null) {
    testFailed("assertProperty", name);
    return false;
  } else {
    testPassed("assertProperty", name);
    return true;
  }
}

function compare(a,b) {
  if (typeof a == 'number' && typeof b == 'number') {
    return a == b;
  } else {
    return Object.toSource(a) == Object.toSource(b);
  }
}

function assertEquals(name, v, p) {
  if (p == null) { p = v; v = name; name = null; }
  if (!compare(v, p)) {
    testFailed("assertEquals", name, v, p);
    return false;
  } else {
    testPassed("assertEquals", name, v, p);
    return true;
  }
}

function assertArrayEquals(name, v, p) {
  if (p == null) { p = v; v = name; name = null; }
  if (!v) {
    testFailed("assertArrayEquals: first array undefined", name, v, p);
    return false;
  }
  if (!p) {
    testFailed("assertArrayEquals: second array undefined", name, v, p);
    return false;
  }
  if (v.length != p.length) {
    testFailed("assertArrayEquals", name, v, p);
    return false;
  }
  for (var ii = 0; ii < v.length; ++ii) {
    if (v[ii] != p[ii]) {
      testFailed("assertArrayEquals", name, v, p);
      return false;
    }
  }
  testPassed("assertArrayEquals", name, v, p);
  return true;
}

function assertNotEquals(name, v, p) {
  if (p == null) { p = v; v = name; name = null; }
  if (compare(v, p)) {
    testFailed("assertNotEquals", name, v, p)
    return false;
  } else {
    testPassed("assertNotEquals", name, v, p)
    return true;
  }
}

function time(elementId, f) {
    var s = document.getElementById(elementId);
    var t0 = new Date().getTime();
    f();
    var t1 = new Date().getTime();
    s.textContent = 'Elapsed: '+(t1-t0)+' ms';
}

function randomFloat () {
    // note that in fuzz-testing, this can used as the size of a buffer to allocate.
    // so it shouldn't return astronomic values. The maximum value 10000000 is already quite big.
    var fac = 1.0;
    var r = Math.random();
    if (r < 0.25)
        fac = 10;
    else if (r < 0.4)
        fac = 100;
    else if (r < 0.5)
        fac = 1000;
    else if (r < 0.6)
        fac = 100000;
    else if (r < 0.7)
        fac = 10000000;
    else if (r < 0.8)
        fac = NaN;
    return -0.5*fac + Math.random() * fac;
}
function randomFloatFromRange(lo, hi) {
  var r = Math.random();
  if (r < 0.05)
    return lo;
  else if (r > 0.95)
    return hi;
  else
    return lo + Math.random()*(hi-lo);
}
function randomInt (sz) {
  if (sz != null)
    return Math.floor(Math.random()*sz);
  else
    return Math.floor(randomFloat());
}
function randomIntFromRange(lo, hi) {
  return Math.floor(randomFloatFromRange(lo, hi));
}
function randomLength () {
    var l = Math.floor(Math.random() * 256);
    if (Math.random < 0.5) l = l / 10;
    if (Math.random < 0.3) l = l / 10;
    return l;
}
function randomSmallIntArray () {
    var l = randomLength();
    var s = new Array(l);
    for (var i=0; i<l; i++)
        s[i] = Math.floor(Math.random() * 256)-1;
    return s;
}
function randomFloatArray () {
    var l = randomLength();
    var s = new Array(l);
    for (var i=0; i<l; i++)
        s[i] = randomFloat();
    return s;
}
function randomIntArray () {
    var l = randomLength();
    var s = new Array(l);
    for (var i=0; i<l; i++)
        s[i] = randomFloat();
    return s;
}
function randomMixedArray () {
    var l = randomLength();
    var s = new Array(l);
    for (var i=0; i<l; i++)
        s[i] = randomNonArray();
    return s;
}
function randomArray () {
    var r = Math.random();
    if (r < 0.3)
        return randomFloatArray();
    else if (r < 0.6)
        return randomIntArray();
    else if (r < 0.8)
        return randomSmallIntArray();
    else
        return randomMixedArray();
}
function randomString () {
    return String.fromCharCode.apply(String, randomSmallIntArray());
}
function randomGLConstant () {
    return GLConstants[Math.floor(Math.random() * GLConstants.length)];
}

function randomNonArray() {
    var r = Math.random();
    if (r < 0.25) {
        return randomFloat();
    } else if (r < 0.6) {
        return randomInt();
    } else if (r < 0.7) {
        return (r < 0.65);
    } else if (r < 0.87) {
        return randomString();
    } else if (r < 0.98) {
        return randomGLConstant();
    } else {
        return null;
    }
}

function generateRandomArg(pos, count) {
    if (pos == 0 && Math.random() < 0.5)
        return randomGLConstant();
    if (pos == count-1 && Math.random() < 0.25)
        if (Math.random() < 0.5)
            return randomString();
        else
            return randomArray();
    var r = Math.random();
    if (r < 0.25) {
        return randomFloat();
    } else if (r < 0.6) {
        return randomInt();
    } else if (r < 0.7) {
        return (r < 0.65);
    } else if (r < 0.77) {
        return randomString();
    } else if (r < 0.84) {
        return randomArray();
    } else if (r < 0.98) {
        return randomGLConstant();
    } else {
        return null;
    }
}


function generateRandomArgs(count) {
    var arr = new Array(count);
    for (var i=0; i<count; i++)
        arr[i] = generateRandomArg(i, count);
    return arr;
}

// qc (arg1gen, arg2gen, ..., predicate)
// qc (randomString, randomInt, randomInt, function(s,i,j){ s.substring(i,j) })
function qc() {
}

GLConstants = [
1,
0x00000100,
0x00000400,
0x00004000,
0x0000,
0x0001,
0x0002,
0x0003,
0x0004,
0x0005,
0x0006,
0,
1,
0x0300,
0x0301,
0x0302,
0x0303,
0x0304,
0x0305,
0x0306,
0x0307,
0x0308,
0x8006,
0x8009,
0x8009,
0x883D,
0x800A,
0x800B,
0x80C8,
0x80C9,
0x80CA,
0x80CB,
0x8001,
0x8002,
0x8003,
0x8004,
0x8005,
0x8892,
0x8893,
0x8894,
0x8895,
0x88E0,
0x88E4,
0x88E8,
0x8764,
0x8765,
0x8626,
0x0404,
0x0405,
0x0408,
0x0DE1,
0x0B44,
0x0BE2,
0x0BD0,
0x0B90,
0x0B71,
0x0C11,
0x8037,
0x809E,
0x80A0,
0,
0x0500,
0x0501,
0x0502,
0x0505,
0x0900,
0x0901,
0x0B21,
0x846D,
0x846E,
0x0B45,
0x0B46,
0x0B70,
0x0B72,
0x0B73,
0x0B74,
0x0B91,
0x0B92,
0x0B94,
0x0B95,
0x0B96,
0x0B97,
0x0B93,
0x0B98,
0x8800,
0x8801,
0x8802,
0x8803,
0x8CA3,
0x8CA4,
0x8CA5,
0x0BA2,
0x0C10,
0x0C22,
0x0C23,
0x0CF5,
0x0D05,
0x0D33,
0x0D3A,
0x0D50,
0x0D52,
0x0D53,
0x0D54,
0x0D55,
0x0D56,
0x0D57,
0x2A00,
0x8038,
0x8069,
0x80A8,
0x80A9,
0x80AA,
0x80AB,
0x86A2,
0x86A3,
0x1100,
0x1101,
0x1102,
0x8192,
0x1400,
0x1401,
0x1402,
0x1403,
0x1404,
0x1405,
0x1406,
0x140C,
0x1902,
0x1906,
0x1907,
0x1908,
0x1909,
0x190A,
0x8033,
0x8034,
0x8363,
0x8B30,
0x8B31,
0x8869,
0x8DFB,
0x8DFC,
0x8B4D,
0x8B4C,
0x8872,
0x8DFD,
0x8B4F,
0x8B80,
0x8B82,
0x8B83,
0x8B85,
0x8B86,
0x8B87,
0x8B89,
0x8B8A,
0x8B8C,
0x8B8D,
0x0200,
0x0201,
0x0202,
0x0203,
0x0204,
0x0205,
0x0206,
0x0207,
0x1E00,
0x1E01,
0x1E02,
0x1E03,
0x150A,
0x8507,
0x8508,
0x1F00,
0x1F01,
0x1F02,
0x1F03,
0x2600,
0x2601,
0x2700,
0x2701,
0x2702,
0x2703,
0x2800,
0x2801,
0x2802,
0x2803,
0x1702,
0x8513,
0x8514,
0x8515,
0x8516,
0x8517,
0x8518,
0x8519,
0x851A,
0x851C,
0x84C0,
0x84C1,
0x84C2,
0x84C3,
0x84C4,
0x84C5,
0x84C6,
0x84C7,
0x84C8,
0x84C9,
0x84CA,
0x84CB,
0x84CC,
0x84CD,
0x84CE,
0x84CF,
0x84D0,
0x84D1,
0x84D2,
0x84D3,
0x84D4,
0x84D5,
0x84D6,
0x84D7,
0x84D8,
0x84D9,
0x84DA,
0x84DB,
0x84DC,
0x84DD,
0x84DE,
0x84DF,
0x84E0,
0x2901,
0x812F,
0x8370,
0x8B50,
0x8B51,
0x8B52,
0x8B53,
0x8B54,
0x8B55,
0x8B56,
0x8B57,
0x8B58,
0x8B59,
0x8B5A,
0x8B5B,
0x8B5C,
0x8B5E,
0x8B60,
0x8622,
0x8623,
0x8624,
0x8625,
0x886A,
0x8645,
0x889F,
0x8B9A,
0x8B9B,
0x8B81,
0x8B84,
0x8B88,
0x8DFA,
0x8DF8,
0x8DF9,
0x8DF0,
0x8DF1,
0x8DF2,
0x8DF3,
0x8DF4,
0x8DF5,
0x8D40,
0x8D41,
0x8056,
0x8057,
0x8D62,
0x81A5,
0x1901,
0x8D48,
0x8D42,
0x8D43,
0x8D44,
0x8D50,
0x8D51,
0x8D52,
0x8D53,
0x8D54,
0x8D55,
0x8CD0,
0x8CD1,
0x8CD2,
0x8CD3,
0x8CE0,
0x8D00,
0x8D20,
0,
0x8CD5,
0x8CD6,
0x8CD7,
0x8CD9,
0x8CDD,
0x8CA6,
0x8CA7,
0x84E8,
0x0506,
0x809D
];

function reportTestResultsToHarness(success, msg) {
  if (window.parent.webglTestHarness) {
    window.parent.webglTestHarness.reportResults(success, msg);
  }
}

function notifyFinishedToHarness() {
  if (window.parent.webglTestHarness) {
    window.parent.webglTestHarness.notifyFinished();
  }
}

function initTests() {
  if (Tests.message != null) {
    var h = document.getElementById('test-message');
    if (h == null) {
      h = document.createElement('p');
      h.id = 'test-message';
      document.body.insertBefore(h, document.body.firstChild);
    }
    h.textContent = Tests.message;
  }
  if (Tests.autorun) {
    runTests();
  } else {
    var h = document.getElementById('test-run');
    if (h == null) {
      h = document.createElement('input');
      h.type = 'submit';
      h.value = "Run tests";
      h.addEventListener('click', function(ev){
        runTests();
        ev.preventDefault();
      }, false);
      h.id = 'test-run';
      document.body.insertBefore(h, document.body.firstChild);
    }
    h.textContent = Tests.message;
  }

}

window.addEventListener('load', function(){
  // let the browser hopefully finish updating the gl canvas surfaces if we are given a delay
  if (Tests.delay)
    setTimeout(initTests, Tests.delay);
  else
    initTests()
}, false);

