import { extend } from '../../vue';
import { NAME_COLLAPSE, NAME_NAVBAR_TOGGLE } from '../../constants/components';
import { EVENT_NAME_CLICK } from '../../constants/events';
import { PROP_TYPE_BOOLEAN, PROP_TYPE_STRING, PROP_TYPE_ARRAY_STRING } from '../../constants/props';
import { SLOT_NAME_DEFAULT } from '../../constants/slots';
import { getRootEventName } from '../../utils/events';
import { makePropsConfigurable, makeProp } from '../../utils/props';
import { listenOnRootMixin } from '../../mixins/listen-on-root';
import { normalizeSlotMixin } from '../../mixins/normalize-slot';
import { VBToggle } from '../../directives/toggle/toggle';

// --- Constants ---

const CLASS_NAME = 'navbar-toggler';
const ROOT_EVENT_NAME_STATE = getRootEventName(NAME_COLLAPSE, 'state');
const ROOT_EVENT_NAME_SYNC_STATE = getRootEventName(NAME_COLLAPSE, 'sync-state');

// --- Props ---

const props = makePropsConfigurable({
  disabled: makeProp(PROP_TYPE_BOOLEAN, false),
  label: makeProp(PROP_TYPE_STRING, 'Toggle navigation'),
  target: makeProp(PROP_TYPE_ARRAY_STRING, undefined, true) // Required
}, NAME_NAVBAR_TOGGLE);

// --- Main component ---

// @vue/component
const BNavbarToggle = /*#__PURE__*/extend({
  name: NAME_NAVBAR_TOGGLE,
  directives: {
    VBToggle
  },
  mixins: [listenOnRootMixin, normalizeSlotMixin],
  props,
  data() {
    return {
      toggleState: false
    };
  },
  created() {
    this.listenOnRoot(ROOT_EVENT_NAME_STATE, this.handleStateEvent);
    this.listenOnRoot(ROOT_EVENT_NAME_SYNC_STATE, this.handleStateEvent);
  },
  methods: {
    onClick(event) {
      if (!this.disabled) {
        // Emit courtesy `click` event
        this.$emit(EVENT_NAME_CLICK, event);
      }
    },
    handleStateEvent(id, state) {
      // We listen for state events so that we can pass the
      // boolean expanded state to the default scoped slot
      if (id === this.target) {
        this.toggleState = state;
      }
    }
  },
  render(h) {
    const {
      disabled
    } = this;
    return h('button', {
      staticClass: CLASS_NAME,
      class: {
        disabled
      },
      directives: [{
        name: 'VBToggle',
        value: this.target
      }],
      attrs: {
        type: 'button',
        disabled,
        'aria-label': this.label
      },
      on: {
        click: this.onClick
      }
    }, [this.normalizeSlot(SLOT_NAME_DEFAULT, {
      expanded: this.toggleState
    }) || h('span', {
      staticClass: `${CLASS_NAME}-icon`
    })]);
  }
});

export { BNavbarToggle, props };
