import { NAME_AVATAR_GROUP } from '../../constants/components'
import {
  PROP_TYPE_BOOLEAN,
  PROP_TYPE_BOOLEAN_STRING,
  PROP_TYPE_NUMBER_STRING,
  PROP_TYPE_STRING
} from '../../constants/props'
import { normalizeSlotMixin } from '../../mixins/normalize-slot'
import { mathMax, mathMin } from '../../utils/math'
import { toFloat } from '../../utils/number'
import { makeProp, makePropsConfigurable } from '../../utils/props'
import { extend } from '../../vue'
import { computeSize } from './avatar'

// --- Props ---

export const props = makePropsConfigurable(
  {
    overlap: makeProp(PROP_TYPE_NUMBER_STRING, 0.3),
    // Child avatars will prefer this prop (if set) over their own
    rounded: makeProp(PROP_TYPE_BOOLEAN_STRING, false),
    // Child avatars will always use this over their own size
    size: makeProp(PROP_TYPE_STRING),
    // Child avatars will prefer this prop (if set) over their own
    square: makeProp(PROP_TYPE_BOOLEAN, false),
    tag: makeProp(PROP_TYPE_STRING, 'div'),
    // Child avatars will prefer this variant over their own
    variant: makeProp(PROP_TYPE_STRING)
  },
  NAME_AVATAR_GROUP
)

// --- Main component ---

// @vue/component
export const BAvatarGroup = /*#__PURE__*/ extend({
  name: NAME_AVATAR_GROUP,
  mixins: [normalizeSlotMixin],
  provide() {
    return { getBvAvatarGroup: () => this }
  },
  props,
  computed: {
    computedSize() {
      return computeSize(this.size)
    },
    overlapScale() {
      return mathMin(mathMax(toFloat(this.overlap, 0), 0), 1) / 2
    },
    paddingStyle() {
      let value = this.computedSize
      value = value ? `calc(${value} * ${this.overlapScale})` : null
      return value ? { paddingLeft: value, paddingRight: value } : {}
    }
  },
  render(h) {
    const $inner = h(
      'div',
      {
        staticClass: 'b-avatar-group-inner',
        style: this.paddingStyle
      },
      this.normalizeSlot()
    )

    return h(
      this.tag,
      {
        staticClass: 'b-avatar-group',
        attrs: { role: 'group' }
      },
      [$inner]
    )
  }
})