/* eslint-disable @typescript-eslint/no-non-null-assertion */
/* eslint-disable @typescript-eslint/no-explicit-any */
import * as React from 'react';
import { ENVIRONMENT, LOCATION } from '@iconag/general-types';
// import { LocationSelectionContext } from '@iconag/context';
import { GLOBALS } from '@iconag/globals';
import {
  handleTreeViewCheckChange,
  processTreeViewItems,
  TreeView,
  TreeViewCheckDescriptor,
  TreeViewExpandChangeEvent,
} from '@progress/kendo-react-treeview';
import {
  parseLocationChildren,
  parseLocationData,
  useReadLocationChildren,
  useReadSingleLocationHandler,
} from '@iconag/dataHandlers';
import { convertLocationDataToTreeData } from '@iconag/scripts';
import { mapTree } from '@progress/kendo-react-common';
import Loading from '../../Loading/Loading';

const textField = 'text';

type CheckedLocationIds = { id: string; itemHierarchicalIndex: string };

type LocalizationTreeSelectorProps = {
  environment: ENVIRONMENT.environment;
  locationURL: string;
};

const LocalizationTreeSelector = (props: LocalizationTreeSelectorProps) => {
  const { environment, locationURL } = props;
  const { LOCATION_ROOT } = GLOBALS;
  const [expanded, setExpanded] = React.useState<string[]>([]);
  const [check, setCheck] = React.useState<
    | any[]
    | (TreeViewCheckDescriptor & {
        ids: any[];
      })
  >({
    ids: [],
    applyCheckIndeterminate: true,
  });
  // const { selectedLocations, setSelectedLocations } = React.useContext(
  //   LocationSelectionContext
  // );
  const [treeData, setTreeData] = React.useState<
    LOCATION.LocationTreeDataItem[]
  >([]);

  const { readSingleLocation, readSingleLocationService, locationData } =
    useReadSingleLocationHandler(parseLocationData);
  const { readLocationChildren, locationChildren } = useReadLocationChildren(
    parseLocationChildren
  );
  const [currentParent, setCurrentParent] = React.useState<string | null>(null);
  const [checkedLocations, setCheckedLocations] = React.useState<
    CheckedLocationIds[]
  >([]);
  const copyDataAndLocation = (locationIndex: string) => {
    const data = treeData.slice();
    let location: any;
    mapTree(data, 'items', (item) => {
      if (item.id === locationIndex) location = item;
    });
    return { data, location };
  };

  React.useEffect(() => {
    if (readSingleLocationService.status === 'init' && locationData === null) {
      readSingleLocation(environment, 'Region', LOCATION_ROOT, locationURL);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  React.useEffect(() => {
    if (locationData !== null) {
      const treeItem: LOCATION.LocationTreeDataItem =
        convertLocationDataToTreeData(locationData, true);
      if (treeData.length === 0) {
        setTreeData([treeItem]);
      }
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [locationData]);

  React.useEffect(() => {
    if (locationChildren !== null && currentParent !== null) {
      const { data, location } = copyDataAndLocation(currentParent);
      location.items = locationChildren.map((childItem, idx) => {
        const parentLocationIsChecked = checkedLocations.find(
          (loc) => loc.id === location.id
        );
        if (parentLocationIsChecked) {
          const newId =
            parentLocationIsChecked.itemHierarchicalIndex + '_' + idx;
        }
        return convertLocationDataToTreeData(childItem, false);
      });
      setTreeData(data);
      setCurrentParent(null);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [locationChildren]);

  const onExpandChange = (event: TreeViewExpandChangeEvent) => {
    const parentId = event.item.id;
    setCurrentParent(parentId);
    const expand = expanded.slice();
    const index = expand.indexOf(event.itemHierarchicalIndex);
    if (index === -1) {
      expand.push(event.itemHierarchicalIndex);
    } else {
      expand.splice(index, 1);
    }
    setExpanded(expand);
    if (event.item.hasChildren && !event.item.items) {
      readLocationChildren(
        event.item.type,
        event.item.id,
        environment,
        locationURL
      );
    }
  };

  const onCheckChange = (event: TreeViewExpandChangeEvent) => {
    const newCheckedData = handleTreeViewCheckChange(event, check, treeData, {
      checkChildren: true,
      checkParents: true,
      singleMode: false,
    });
    if (checkedLocations.find((locIds) => locIds.id === event.item.id)) {
      setCheckedLocations((checkedLocations) =>
        checkedLocations.filter((loc) => loc.id !== event.item.id)
      );
    } else {
      const newCheckedLocation: CheckedLocationIds = {
        id: event.item.id,
        itemHierarchicalIndex: event.itemHierarchicalIndex,
      };
      setCheckedLocations((checkedLocations) => [
        ...checkedLocations,
        newCheckedLocation,
      ]);
    }
    setCheck(newCheckedData);
  };

  if (readSingleLocationService.status === 'loading') {
    return <Loading spinnerSize="medium" />;
  }

  return (
    <TreeView
      data={processTreeViewItems(treeData, { expand: expanded, check: check })}
      onExpandChange={onExpandChange}
      onCheckChange={onCheckChange}
      expandIcons={true}
      textField={textField}
      checkboxes={true}
      animate={false}
    />
  );
};
export default LocalizationTreeSelector;