import './waves.css';
(function() {
  const vueWaves = {};
  vueWaves.install = (Vue, options = {}) => {
    Vue.directive('waves', {
      bind(el, binding) {
        el.addEventListener('click', e => {
          const customOpts = Object.assign(options, binding.value);
          const opts = Object.assign({
              ele: el, // 波纹作用元素
              type: 'hit', // hit点击位置扩散center中心点扩展
              color: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
            }, customOpts),
            target = opts.ele;
          if (target) {
            target.style.position = 'relative';
            target.style.overflow = 'hidden';
            const rect = target.getBoundingClientRect();
            let ripple = target.querySelector('.waves-ripple');
            if (!ripple) {
              ripple = document.createElement('span');
              ripple.className = 'waves-ripple';
              ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px';
              target.appendChild(ripple);
            } else {
              ripple.className = 'waves-ripple';
            }
            switch (opts.type) {
              case 'center':
                ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px';
                ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px';
                break;
              default:
                ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px';
                ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px';
            }
            ripple.style.backgroundColor = opts.color;
            ripple.className = 'waves-ripple z-active';
            return false;
          }
        }, false);
      }
    })
  };
  if (typeof exports == 'object') {
    module.exports = vueWaves
  } else if (typeof define == 'function' && define.amd) {
    define([], () => vueWaves)
  } else if (window.Vue) {
    window.vueWaves = vueWaves;
    Vue.use(vueWaves)
  }
}());