'use strict';
(function () {
window.onload = function () {

  // Create Croppr instance
  var croppr = new Croppr('#croppr', {
    startSize: [80, 80, '%'],
    onCropMove: function onCropMove(value) {
      updateValue(value.x, value.y, value.width, value.height);
    }
  });

  // Aspect Ratio
  var ratioCheckbox = document.getElementById('cb-ratio');
  var ratioInput = document.getElementById('input-ratio');

  ratioCheckbox.addEventListener('change', function (event) {
    if (!event.target.checked) {
      croppr.options.aspectRatio = null;
      ratioInput.disabled = true;
      ratioInput.classList.remove('is-danger');
      croppr.reset();
      return;
    }

    ratioInput.disabled = false;
    var value = ratioInput.value;
    if (!isNumber(value)) {
      if (value !== '') {
        ratioInput.classList.add('is-danger');
      }
      return;
    } else {
      ratioInput.classList.remove('is-danger');
    }
    croppr.options.aspectRatio = Number(value);

    croppr.reset();
  });

  ratioInput.addEventListener('input', function (event) {
    if (!ratioCheckbox.checked) {
      return;
    }
    var value = ratioInput.value;
    if (!isNumber(value)) {
      ratioInput.classList.add('is-danger');
      return;
    } else {
      ratioInput.classList.remove('is-danger');
      value = Number(value);
      croppr.options.aspectRatio = value;
      croppr.reset();
    }
  });

  // Maximum size
  var maxCheckbox = document.getElementById('max-checkbox');
  var maxInputs = [
    document.getElementById('max-input-width'),
    document.getElementById('max-input-height'),
    document.getElementById('max-input-unit')
  ];

  maxCheckbox.addEventListener('change', function (event) {
    if (!event.target.checked) {
      croppr.options.maxSize = {
        width: null,
        height: null
      };
      maxInputs.map(function (el) {
        el.disabled = true;
        el.classList.remove('is-danger');
      });
      croppr.reset();
      return;
    } else {
      maxInputs.map(function (el) {
        el.disabled = false;
      });
    }

    var values = maxInputs.map(parseElementValues);
    croppr.options.maxSize = {
      width: Number(values[0]),
      height: Number(values[1]),
      unit: values[2]
    };
    croppr.reset();
  });

  maxInputs.map(function (el) {
    el.addEventListener('input', handleChange(croppr, 'maxSize', maxInputs));
  });

  // Minimum size
  var minCheckbox = document.getElementById('min-checkbox');
  var minInputs = [
    document.getElementById('min-input-width'),
    document.getElementById('min-input-height'),
    document.getElementById('min-input-unit')
  ];

  minCheckbox.addEventListener('change', function (event) {
    if (!event.target.checked) {
      croppr.options.minSize = {
        width: null,
        height: null
      };
      minInputs.map(function (el) {
        el.disabled = true;
        el.classList.remove('is-danger');
      });
      croppr.reset();
      return;
    } else {
      minInputs.map(function (el) {
        el.disabled = false;
      });
    }

    var values = minInputs.map(parseElementValues);
    croppr.options.minSize = {
      width: Number(values[0]),
      height: Number(values[1]),
      unit: values[2]
    };
    croppr.reset();
  });

  minInputs.map(function (el) {
    el.addEventListener('input', handleChange(croppr, 'minSize', minInputs));
  });

  var value = croppr.getValue();
  updateValue(value.x, value.y, value.width, value.height);

};


/** Functions */
function updateValue(x, y, w, h) {
  document.getElementById('valX').innerHTML = '<strong class="font-weight-bold">x : </strong>&nbsp;' + x;
  document.getElementById('valY').innerHTML = '<strong class="font-weight-bold">y : </strong>&nbsp;' + y;
  document.getElementById('valW').innerHTML = '<strong class="font-weight-bold">width : </strong>&nbsp;' + w;
  document.getElementById('valH').innerHTML = '<strong class="font-weight-bold">height : </strong>&nbsp;' + h;
}

// check number
function isNumber(value) {
  if (isNaN(parseInt(value))) {
    return false;
  }
  if (value === '') {
    return false;
  }
  return true;
}

// parce value
function parseElementValues(element) {
  var value = element.value;
  if (element.tagName !== 'SELECT') {
    if (!isNumber(value)) {
      if (value !== '') {
        element.classList.add('is-danger');
      }
      return null;
    } else {
      element.classList.remove('is-danger');
      return value;
    }
  } else {
    return value;
  }
}
//  change event
function handleChange(croppr, option, elements) {
  return function () {
    var values = elements.map(parseElementValues);
    croppr.options[option] = {
      width: Number(values[0]),
      height: Number(values[1]),
      unit: values[2]

      // Convert to pixels
    };
    if (values[2] === '%') {
      croppr.options.convertToPixels(croppr.cropperEl);
    }

    croppr.reset();
  };
}

})();