import { extend, mergeData } from '../../vue';
import { NAME_IMG } from '../../constants/components';
import { PROP_TYPE_STRING, PROP_TYPE_BOOLEAN, PROP_TYPE_NUMBER_STRING, PROP_TYPE_BOOLEAN_STRING, PROP_TYPE_ARRAY_STRING } from '../../constants/props';
import { concat } from '../../utils/array';
import { identity } from '../../utils/identity';
import { isString } from '../../utils/inspect';
import { toInteger } from '../../utils/number';
import { makePropsConfigurable, makeProp } from '../../utils/props';
import { toString } from '../../utils/string';

// --- Constants --

// Blank image with fill template
const BLANK_TEMPLATE = '<svg width="%{w}" height="%{h}" ' + 'xmlns="http://www.w3.org/2000/svg" ' + 'viewBox="0 0 %{w} %{h}" preserveAspectRatio="none">' + '<rect width="100%" height="100%" style="fill:%{f};"></rect>' + '</svg>';

// --- Helper methods ---

const makeBlankImgSrc = (width, height, color) => {
  const src = encodeURIComponent(BLANK_TEMPLATE.replace('%{w}', toString(width)).replace('%{h}', toString(height)).replace('%{f}', color));
  return `data:image/svg+xml;charset=UTF-8,${src}`;
};

// --- Props ---

const props = makePropsConfigurable({
  alt: makeProp(PROP_TYPE_STRING),
  blank: makeProp(PROP_TYPE_BOOLEAN, false),
  blankColor: makeProp(PROP_TYPE_STRING, 'transparent'),
  block: makeProp(PROP_TYPE_BOOLEAN, false),
  center: makeProp(PROP_TYPE_BOOLEAN, false),
  fluid: makeProp(PROP_TYPE_BOOLEAN, false),
  // Gives fluid images class `w-100` to make them grow to fit container
  fluidGrow: makeProp(PROP_TYPE_BOOLEAN, false),
  height: makeProp(PROP_TYPE_NUMBER_STRING),
  left: makeProp(PROP_TYPE_BOOLEAN, false),
  right: makeProp(PROP_TYPE_BOOLEAN, false),
  // Possible values:
  //   `false`: no rounding of corners
  //   `true`: slightly rounded corners
  //   'top': top corners rounded
  //   'right': right corners rounded
  //   'bottom': bottom corners rounded
  //   'left': left corners rounded
  //   'circle': circle/oval
  //   '0': force rounding off
  rounded: makeProp(PROP_TYPE_BOOLEAN_STRING, false),
  sizes: makeProp(PROP_TYPE_ARRAY_STRING),
  src: makeProp(PROP_TYPE_STRING),
  srcset: makeProp(PROP_TYPE_ARRAY_STRING),
  thumbnail: makeProp(PROP_TYPE_BOOLEAN, false),
  width: makeProp(PROP_TYPE_NUMBER_STRING)
}, NAME_IMG);

// --- Main component ---

// @vue/component
const BImg = /*#__PURE__*/extend({
  name: NAME_IMG,
  functional: true,
  props,
  render(h, _ref) {
    let {
      props,
      data
    } = _ref;
    let {
      alt,
      src,
      block,
      fluidGrow,
      rounded
    } = props;
    let width = toInteger(props.width) || null;
    let height = toInteger(props.height) || null;
    let align = null;
    let srcset = concat(props.srcset).filter(identity).join(',');
    let sizes = concat(props.sizes).filter(identity).join(',');
    if (props.blank) {
      if (!height && width) {
        height = width;
      } else if (!width && height) {
        width = height;
      }
      if (!width && !height) {
        width = 1;
        height = 1;
      }
      // Make a blank SVG image
      src = makeBlankImgSrc(width, height, props.blankColor || 'transparent');
      // Disable srcset and sizes
      srcset = null;
      sizes = null;
    }
    if (props.left) {
      align = 'float-left';
    } else if (props.right) {
      align = 'float-right';
    } else if (props.center) {
      align = 'mx-auto';
      block = true;
    }
    return h('img', mergeData(data, {
      attrs: {
        src,
        alt,
        width: width ? toString(width) : null,
        height: height ? toString(height) : null,
        srcset: srcset || null,
        sizes: sizes || null
      },
      class: {
        'img-thumbnail': props.thumbnail,
        'img-fluid': props.fluid || fluidGrow,
        'w-100': fluidGrow,
        rounded: rounded === '' || rounded === true,
        [`rounded-${rounded}`]: isString(rounded) && rounded !== '',
        [align]: align,
        'd-block': block
      }
    }));
  }
});

export { BImg, props };
