//*************MAX MIN************
function max(numbers) {
 // your code here
  var maxNum = numbers [0];
  for (i=1; i<numbers.length; i++){
    if (maxNum < numbers [i]){
      maxNum = numbers [i];
    }
  }
  return maxNum;
}


function min(numbers) {
 // your code here
  var minNum = numbers [0];
  for (i=1; i<numbers.length; i++){
    if (minNum > numbers [i]){
      minNum = numbers [i];
    }
  }
  return minNum;
}



/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/


// tests

function testFunctionWorks(fn, input, expected) {
  if (fn(input) === expected) {
    console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
    return true;
  }
  else {
    console.log(
      'FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected +
      ' but was ' + fn(input)
    );
    return false;
  }
}


(function runTests() {
  // we'll use the variables in our test cases
  var numList1 = [-5, 28, 98, -20013, 0.7878, 22, 115];
  var realMin1 = numList1[3];
  var realMax1 = numList1[6];
  var numList2 = [0, 1, 2, 3, 4];
  var realMin2 = numList2[0];
  var realMax2 = numList2[4];

  var testResults = [
    testFunctionWorks(max, numList1, realMax1),
    testFunctionWorks(max, numList2, realMax2),
    testFunctionWorks(min, numList1, realMin1),
    testFunctionWorks(min, numList2, realMin2),
  ];

  var numPassing = testResults.filter(function(result){ return result; }).length;
  console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
})();



//***************AVERAGE*******************

function average(numbers) {
  // your code goes here
  var numSum = 0;

  for (i=0; i<numbers.length; i++) {
    numSum += numbers[i];
  }
  return numSum/numbers.length;

}


/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/


// tests

function testFunctionWorks(fn, input, expected) {
  if (fn(input) === expected) {
    console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
    return true;
  }
  else {
    console.log(
      'FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected +
      ' but was ' + fn(input)
    );
    return false;
  }
}

(function runTests() {
  var numList1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
  var correctAns1 = 5.5;
  var numList2 = [0, -1, 1];
  var correctAns2 = 0;

  var testResults = [
    testFunctionWorks(average, numList1, correctAns1),
    testFunctionWorks(average, numList2, correctAns2)
  ];
  var numPassing = testResults.filter(function(result){ return result; }).length;
  console.log(numPassing + ' out of ' + testResults.length + ' tests passing.')
})();


//****************FIZZBUZZ******************
function fizzBuzz(countTo) {
  // your code here
  var finalArray = [];

  for (i=1; i<=countTo; i++) {
   if (i%3===0 && i%5===0){
     finalArray.push("fizzbuzz");
   }
   else if (i%3===0){
     finalArray.push("fizz");
   }
   else if (i%5===0){
     finalArray.push("buzz");
   }
   else {
     finalArray.push(i);
   }
  }


  return finalArray;
}




/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/



// tests
(function testFizzBuzz() {
  // we'll use the variables in our test cases
  var countTo = 16;
  var expected = [
    1, 2, 'fizz', 4, 'buzz', 'fizz', 7, 8, 'fizz',
    'buzz', 11, 'fizz', 13, 14, 'fizzbuzz', 16
  ];

  var actual = fizzBuzz(countTo) || [];

  if (
    expected.length === actual.length &&
    expected.every(function(item, index) {
      return actual[index] === item;}) ) {

      console.log('SUCCESS: fizzBuzz is working');
  }
  else {
    console.log('FAILURE: fizzBuzz is not working');
  }
})();