import "../../../src/components/VProgressLinear/VProgressLinear.sass"; // Components

import { VFadeTransition, VSlideXTransition } from '../transitions'; // Mixins

import Colorable from '../../mixins/colorable';
import { factory as PositionableFactory } from '../../mixins/positionable';
import Proxyable from '../../mixins/proxyable';
import Themeable from '../../mixins/themeable'; // Utilities

import { convertToUnit, getSlot } from '../../util/helpers';
import mixins from '../../util/mixins';
const baseMixins = mixins(Colorable, PositionableFactory(['absolute', 'fixed', 'top', 'bottom']), Proxyable, Themeable);
/* @vue/component */

export default baseMixins.extend({
  name: 'v-progress-linear',
  props: {
    active: {
      type: Boolean,
      default: true
    },
    backgroundColor: {
      type: String,
      default: null
    },
    backgroundOpacity: {
      type: [Number, String],
      default: null
    },
    bufferValue: {
      type: [Number, String],
      default: 100
    },
    color: {
      type: String,
      default: 'primary'
    },
    height: {
      type: [Number, String],
      default: 4
    },
    indeterminate: Boolean,
    query: Boolean,
    rounded: Boolean,
    stream: Boolean,
    striped: Boolean,
    value: {
      type: [Number, String],
      default: 0
    }
  },

  data() {
    return {
      internalLazyValue: this.value || 0
    };
  },

  computed: {
    __cachedBackground() {
      return this.$createElement('div', this.setBackgroundColor(this.backgroundColor || this.color, {
        staticClass: 'v-progress-linear__background',
        style: this.backgroundStyle
      }));
    },

    __cachedBar() {
      return this.$createElement(this.computedTransition, [this.__cachedBarType]);
    },

    __cachedBarType() {
      return this.indeterminate ? this.__cachedIndeterminate : this.__cachedDeterminate;
    },

    __cachedBuffer() {
      return this.$createElement('div', {
        staticClass: 'v-progress-linear__buffer',
        style: this.styles
      });
    },

    __cachedDeterminate() {
      return this.$createElement('div', this.setBackgroundColor(this.color, {
        staticClass: `v-progress-linear__determinate`,
        style: {
          width: convertToUnit(this.normalizedValue, '%')
        }
      }));
    },

    __cachedIndeterminate() {
      return this.$createElement('div', {
        staticClass: 'v-progress-linear__indeterminate',
        class: {
          'v-progress-linear__indeterminate--active': this.active
        }
      }, [this.genProgressBar('long'), this.genProgressBar('short')]);
    },

    __cachedStream() {
      if (!this.stream) return null;
      return this.$createElement('div', this.setTextColor(this.color, {
        staticClass: 'v-progress-linear__stream',
        style: {
          width: convertToUnit(100 - this.normalizedBuffer, '%')
        }
      }));
    },

    backgroundStyle() {
      const backgroundOpacity = this.backgroundOpacity == null ? this.backgroundColor ? 1 : 0.3 : parseFloat(this.backgroundOpacity);
      return {
        opacity: backgroundOpacity,
        width: convertToUnit(this.normalizedBuffer, '%')
      };
    },

    classes() {
      return {
        'v-progress-linear--absolute': this.absolute,
        'v-progress-linear--fixed': this.fixed,
        'v-progress-linear--query': this.query,
        'v-progress-linear--reactive': this.reactive,
        'v-progress-linear--rounded': this.rounded,
        'v-progress-linear--striped': this.striped,
        ...this.themeClasses
      };
    },

    computedTransition() {
      return this.indeterminate ? VFadeTransition : VSlideXTransition;
    },

    normalizedBuffer() {
      return this.normalize(this.bufferValue);
    },

    normalizedValue() {
      return this.normalize(this.internalLazyValue);
    },

    reactive() {
      return Boolean(this.$listeners.change);
    },

    styles() {
      const styles = {};

      if (!this.active) {
        styles.height = 0;
      }

      if (!this.indeterminate && parseFloat(this.normalizedBuffer) !== 100) {
        styles.width = convertToUnit(this.normalizedBuffer, '%');
      }

      return styles;
    }

  },
  methods: {
    genContent() {
      const slot = getSlot(this, 'default', {
        value: this.internalLazyValue
      });
      if (!slot) return null;
      return this.$createElement('div', {
        staticClass: 'v-progress-linear__content'
      }, slot);
    },

    genListeners() {
      const listeners = this.$listeners;

      if (this.reactive) {
        listeners.click = this.onClick;
      }

      return listeners;
    },

    genProgressBar(name) {
      return this.$createElement('div', this.setBackgroundColor(this.color, {
        staticClass: 'v-progress-linear__indeterminate',
        class: {
          [name]: true
        }
      }));
    },

    onClick(e) {
      if (!this.reactive) return;
      const {
        width
      } = this.$el.getBoundingClientRect();
      this.internalValue = e.offsetX / width * 100;
    },

    normalize(value) {
      if (value < 0) return 0;
      if (value > 100) return 100;
      return parseFloat(value);
    }

  },

  render(h) {
    const data = {
      staticClass: 'v-progress-linear',
      attrs: {
        role: 'progressbar',
        'aria-valuemin': 0,
        'aria-valuemax': this.normalizedBuffer,
        'aria-valuenow': this.indeterminate ? undefined : this.normalizedValue
      },
      class: this.classes,
      style: {
        bottom: this.bottom ? 0 : undefined,
        height: this.active ? convertToUnit(this.height) : 0,
        top: this.top ? 0 : undefined
      },
      on: this.genListeners()
    };
    return h('div', data, [this.__cachedStream, this.__cachedBackground, this.__cachedBuffer, this.__cachedBar, this.genContent()]);
  }

});
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