import _objectSpread from "@babel/runtime/helpers/esm/objectSpread2";
import { resolveDirective as _resolveDirective, createVNode as _createVNode } from "vue";
import { computed, defineComponent, nextTick, ref, shallowRef, toRaw, watch } from 'vue';
import useMemo from '../_util/hooks/useMemo';
import KeyCode from '../_util/KeyCode';
import Tree from '../vc-tree/Tree';
import { getAllKeys, isCheckDisabled } from './utils/valueUtil';
import { useBaseProps } from '../vc-select';
import useInjectLegacySelectContext from './LegacyContext';
import useInjectSelectContext from './TreeSelectContext';
var HIDDEN_STYLE = {
  width: 0,
  height: 0,
  display: 'flex',
  overflow: 'hidden',
  opacity: 0,
  border: 0,
  padding: 0,
  margin: 0
};
export default defineComponent({
  name: 'OptionList',
  inheritAttrs: false,
  slots: ['notFoundContent', 'menuItemSelectedIcon'],
  setup: function setup(_, _ref) {
    var slots = _ref.slots,
      expose = _ref.expose;
    var baseProps = useBaseProps();
    var legacyContext = useInjectLegacySelectContext();
    var context = useInjectSelectContext();
    var treeRef = ref();
    var memoTreeData = useMemo(function () {
      return context.treeData;
    }, [function () {
      return baseProps.open;
    }, function () {
      return context.treeData;
    }], function (next) {
      return next[0];
    });
    var mergedCheckedKeys = computed(function () {
      var checkable = legacyContext.checkable,
        halfCheckedKeys = legacyContext.halfCheckedKeys,
        checkedKeys = legacyContext.checkedKeys;
      if (!checkable) {
        return null;
      }
      return {
        checked: checkedKeys,
        halfChecked: halfCheckedKeys
      };
    });
    watch(function () {
      return baseProps.open;
    }, function () {
      nextTick(function () {
        if (baseProps.open && !baseProps.multiple && legacyContext.checkedKeys.length) {
          var _treeRef$value;
          (_treeRef$value = treeRef.value) === null || _treeRef$value === void 0 ? void 0 : _treeRef$value.scrollTo({
            key: legacyContext.checkedKeys[0]
          });
        }
      });
    }, {
      immediate: true,
      flush: 'post'
    });
    // ========================== Search ==========================
    var lowerSearchValue = computed(function () {
      return String(baseProps.searchValue).toLowerCase();
    });
    var filterTreeNode = function filterTreeNode(treeNode) {
      if (!lowerSearchValue.value) {
        return false;
      }
      return String(treeNode[legacyContext.treeNodeFilterProp]).toLowerCase().includes(lowerSearchValue.value);
    };
    // =========================== Keys ===========================
    var expandedKeys = shallowRef(legacyContext.treeDefaultExpandedKeys);
    var searchExpandedKeys = shallowRef(null);
    watch(function () {
      return baseProps.searchValue;
    }, function () {
      if (baseProps.searchValue) {
        searchExpandedKeys.value = getAllKeys(toRaw(context.treeData), toRaw(context.fieldNames));
      }
    }, {
      immediate: true
    });
    var mergedExpandedKeys = computed(function () {
      if (legacyContext.treeExpandedKeys) {
        return legacyContext.treeExpandedKeys.slice();
      }
      return baseProps.searchValue ? searchExpandedKeys.value : expandedKeys.value;
    });
    var onInternalExpand = function onInternalExpand(keys) {
      var _legacyContext$onTree;
      expandedKeys.value = keys;
      searchExpandedKeys.value = keys;
      (_legacyContext$onTree = legacyContext.onTreeExpand) === null || _legacyContext$onTree === void 0 ? void 0 : _legacyContext$onTree.call(legacyContext, keys);
    };
    // ========================== Events ==========================
    var onListMouseDown = function onListMouseDown(event) {
      event.preventDefault();
    };
    var onInternalSelect = function onInternalSelect(_, _ref2) {
      var _context$onSelect;
      var node = _ref2.node;
      var checkable = legacyContext.checkable,
        checkedKeys = legacyContext.checkedKeys;
      if (checkable && isCheckDisabled(node)) {
        return;
      }
      (_context$onSelect = context.onSelect) === null || _context$onSelect === void 0 ? void 0 : _context$onSelect.call(context, node.key, {
        selected: !checkedKeys.includes(node.key)
      });
      if (!baseProps.multiple) {
        var _baseProps$toggleOpen;
        (_baseProps$toggleOpen = baseProps.toggleOpen) === null || _baseProps$toggleOpen === void 0 ? void 0 : _baseProps$toggleOpen.call(baseProps, false);
      }
    };
    // ========================= Keyboard =========================
    var activeKey = ref(null);
    var activeEntity = computed(function () {
      return legacyContext.keyEntities[activeKey.value];
    });
    var setActiveKey = function setActiveKey(key) {
      activeKey.value = key;
    };
    expose({
      scrollTo: function scrollTo() {
        var _treeRef$value2, _treeRef$value2$scrol;
        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }
        return (_treeRef$value2 = treeRef.value) === null || _treeRef$value2 === void 0 ? void 0 : (_treeRef$value2$scrol = _treeRef$value2.scrollTo) === null || _treeRef$value2$scrol === void 0 ? void 0 : _treeRef$value2$scrol.call.apply(_treeRef$value2$scrol, [_treeRef$value2].concat(args));
      },
      onKeydown: function onKeydown(event) {
        var _treeRef$value3;
        var which = event.which;
        switch (which) {
          // >>> Arrow keys
          case KeyCode.UP:
          case KeyCode.DOWN:
          case KeyCode.LEFT:
          case KeyCode.RIGHT:
            (_treeRef$value3 = treeRef.value) === null || _treeRef$value3 === void 0 ? void 0 : _treeRef$value3.onKeydown(event);
            break;
          // >>> Select item
          case KeyCode.ENTER:
            {
              if (activeEntity.value) {
                var _ref3 = activeEntity.value.node || {},
                  selectable = _ref3.selectable,
                  value = _ref3.value;
                if (selectable !== false) {
                  onInternalSelect(null, {
                    node: {
                      key: activeKey.value
                    },
                    selected: !legacyContext.checkedKeys.includes(value)
                  });
                }
              }
              break;
            }
          // >>> Close
          case KeyCode.ESC:
            {
              baseProps.toggleOpen(false);
            }
        }
      },
      onKeyup: function onKeyup() {}
    });
    return function () {
      var _slots$notFoundConten;
      var prefixCls = baseProps.prefixCls,
        multiple = baseProps.multiple,
        searchValue = baseProps.searchValue,
        open = baseProps.open,
        _baseProps$notFoundCo = baseProps.notFoundContent,
        notFoundContent = _baseProps$notFoundCo === void 0 ? (_slots$notFoundConten = slots.notFoundContent) === null || _slots$notFoundConten === void 0 ? void 0 : _slots$notFoundConten.call(slots) : _baseProps$notFoundCo;
      var listHeight = context.listHeight,
        listItemHeight = context.listItemHeight,
        virtual = context.virtual;
      var checkable = legacyContext.checkable,
        treeDefaultExpandAll = legacyContext.treeDefaultExpandAll,
        treeIcon = legacyContext.treeIcon,
        showTreeIcon = legacyContext.showTreeIcon,
        switcherIcon = legacyContext.switcherIcon,
        treeLine = legacyContext.treeLine,
        loadData = legacyContext.loadData,
        treeLoadedKeys = legacyContext.treeLoadedKeys,
        treeMotion = legacyContext.treeMotion,
        onTreeLoad = legacyContext.onTreeLoad,
        checkedKeys = legacyContext.checkedKeys;
      // ========================== Render ==========================
      if (memoTreeData.value.length === 0) {
        return _createVNode("div", {
          "role": "listbox",
          "class": "".concat(prefixCls, "-empty"),
          "onMousedown": onListMouseDown
        }, [notFoundContent]);
      }
      var treeProps = {
        fieldNames: context.fieldNames
      };
      if (treeLoadedKeys) {
        treeProps.loadedKeys = treeLoadedKeys;
      }
      if (mergedExpandedKeys.value) {
        treeProps.expandedKeys = mergedExpandedKeys.value;
      }
      return _createVNode("div", {
        "onMousedown": onListMouseDown
      }, [activeEntity.value && open && _createVNode("span", {
        "style": HIDDEN_STYLE,
        "aria-live": "assertive"
      }, [activeEntity.value.node.value]), _createVNode(Tree, _objectSpread(_objectSpread({
        "ref": treeRef,
        "focusable": false,
        "prefixCls": "".concat(prefixCls, "-tree"),
        "treeData": memoTreeData.value,
        "height": listHeight,
        "itemHeight": listItemHeight,
        "virtual": virtual,
        "multiple": multiple,
        "icon": treeIcon,
        "showIcon": showTreeIcon,
        "switcherIcon": switcherIcon,
        "showLine": treeLine,
        "loadData": searchValue ? null : loadData,
        "motion": treeMotion,
        "activeKey": activeKey.value,
        "checkable": checkable,
        "checkStrictly": true,
        "checkedKeys": mergedCheckedKeys.value,
        "selectedKeys": !checkable ? checkedKeys : [],
        "defaultExpandAll": treeDefaultExpandAll
      }, treeProps), {}, {
        "onActiveChange": setActiveKey,
        "onSelect": onInternalSelect,
        "onCheck": onInternalSelect,
        "onExpand": onInternalExpand,
        "onLoad": onTreeLoad,
        "filterTreeNode": filterTreeNode
      }), _objectSpread(_objectSpread({}, slots), {}, {
        checkable: legacyContext.customSlots.treeCheckable
      }))]);
    };
  }
});