import { useMemo } from 'react';
import {
  CreateHandler,
  DeleteHandler,
  MoveHandler,
  RenameHandler,
  SimpleTree,
} from 'react-arborist';
import { useAtom } from 'jotai';
import { treeDataAtom } from '@/features/page/tree/atoms/tree-data-atom';
import { createPage, deletePage, movePage, updatePage } from '@/features/page/services/page-service';
import { v4 as uuidv4 } from 'uuid';
import { IMovePage } from '@/features/page/types/page.types';
import { useRouter } from 'next/navigation';

export function usePersistence<T>() {
  const [data, setData] = useAtom<T[]>(treeDataAtom);
  const router = useRouter();

  const tree = useMemo(
    () =>
      new SimpleTree<// @ts-ignore
        T>(data),
    [data],
  );

  const onMove: MoveHandler<T> = (args: { parentId, index, parentNode, dragNodes, dragIds }) => {
    for (const id of args.dragIds) {
      tree.move({ id, parentId: args.parentId, index: args.index });
    }
    setData(tree.data);

    const newDragIndex = tree.find(args.dragIds[0])?.childIndex;

    const currentTreeData = args.parentId ? tree.find(args.parentId).children : tree.data;
    const afterId = currentTreeData[newDragIndex - 1]?.id || null;
    const beforeId = !afterId && currentTreeData[newDragIndex + 1]?.id || null;

    const params: IMovePage= {
      id: args.dragIds[0],
      after: afterId,
      before: beforeId,
      parentId: args.parentId || null,
    };

    const payload = Object.fromEntries(
      Object.entries(params).filter(([key, value]) => value !== null && value !== undefined)
    );

    try {
      movePage(payload as IMovePage);
    } catch (error) {
      console.error('Error moving page:', error);
    }
  };

  const onRename: RenameHandler<T> = ({ name, id }) => {
    tree.update({ id, changes: { name } as any });
    setData(tree.data);

    try {
      updatePage({ id, title: name });
    } catch (error) {
      console.error('Error updating page title:', error);
    }
  };

  const onCreate: CreateHandler<T> = async ({ parentId, index, type }) => {
    const data = { id: uuidv4(), name: '' } as any;
    data.children = [];
    tree.create({ parentId, index, data });
    setData(tree.data);

    const payload: { id: string; parentPageId?: string } = { id: data.id };
    if (parentId) {
      payload.parentPageId = parentId;
    }

    try {
      await createPage(payload);
      router.push(`/p/${payload.id}`);
    } catch (error) {
      console.error('Error creating the page:', error);
    }

    return data;
  };

  const onDelete: DeleteHandler<T> = async (args: { ids: string[] }) => {
    args.ids.forEach((id) => tree.drop({ id }));
    setData(tree.data);

    try {
      await deletePage(args.ids[0]);
    } catch (error) {
      console.error('Error deleting page:', error);
    }
  };

  const controllers = { onMove, onRename, onCreate, onDelete };

  return { data, setData, controllers } as const;
}