import { InfiniteData, QueryClient } from '@tanstack/react-query';

export const addData = <TCollection, TData>(
  data: InfiniteData<TCollection>,
  collectionName: string,
  newData: TData,
  findIndex: (page: TCollection) => number,
) => {
  const dataJson = JSON.parse(JSON.stringify(data)) as InfiniteData<TCollection>;
  const { pageIndex, index } = findPage<TCollection>(data, findIndex);

  if (pageIndex !== -1 && index !== -1) {
    return updateData(data, collectionName, newData, findIndex);
  }
  dataJson.pages[0][collectionName].unshift({
    ...newData,
    updatedAt: new Date().toISOString(),
  });

  return dataJson;
};

export const getRecordByProperty = <TCollection, TData>(
  data: InfiniteData<TCollection>,
  collectionName: string,
  findProperty: (item: TData) => boolean,
): TData | undefined => {
  // Find the page and the index of the record in that page
  const { pageIndex, index } = findPage<TCollection>(data, (page) =>
    page[collectionName].findIndex(findProperty),
  );

  // If found, return the record
  if (pageIndex !== -1 && index !== -1) {
    return data.pages[pageIndex][collectionName][index];
  }

  // Return undefined if the record is not found
  return undefined;
};

export function findPage<TData>(data: InfiniteData<TData>, findIndex: (page: TData) => number) {
  for (let pageIndex = 0; pageIndex < data.pages.length; pageIndex++) {
    const page = data.pages[pageIndex];
    const index = findIndex(page);
    if (index !== -1) {
      return { pageIndex, index };
    }
  }
  return { pageIndex: -1, index: -1 }; // Not found
}

export const updateData = <TCollection, TData>(
  data: InfiniteData<TCollection>,
  collectionName: string,
  updatedData: TData,
  findIndex: (page: TCollection) => number,
) => {
  const newData = JSON.parse(JSON.stringify(data)) as InfiniteData<TCollection>;
  const { pageIndex, index } = findPage<TCollection>(data, findIndex);

  if (pageIndex !== -1 && index !== -1) {
    // Remove the data from its current position
    newData.pages[pageIndex][collectionName].splice(index, 1);
    // Add the updated data to the top of the first page
    newData.pages[0][collectionName].unshift({
      ...updatedData,
      updatedAt: new Date().toISOString(),
    });
  }

  return newData;
};

export const deleteData = <TCollection, TData>(
  data: TData,
  collectionName: string,
  findIndex: (page: TCollection) => number,
): TData => {
  const newData = JSON.parse(JSON.stringify(data));
  const { pageIndex, index } = findPage<TCollection>(newData, findIndex);

  if (pageIndex !== -1 && index !== -1) {
    // Delete the data from its current page
    newData.pages[pageIndex][collectionName].splice(index, 1);
  }
  return newData;
};

/**
 * Normalize the data so that the number of data on each page is within pageSize
 */
export const normalizeData = <TCollection, TData>(
  data: InfiniteData<TCollection>,
  collectionName: string,
  pageSize: number,
  uniqueProperty?: keyof TData,
): InfiniteData<TCollection> => {
  const infiniteData = JSON.parse(JSON.stringify(data)) as InfiniteData<TCollection>;
  const pageCount = infiniteData.pages.length;
  if (pageCount === 0) {
    return infiniteData;
  }

  const pageParams = infiniteData.pageParams;

  // Combine all conversations of all pages into one array
  let collection = infiniteData.pages.flatMap((page) => page[collectionName]);

  if (collection.length === 0) {
    return infiniteData;
  }

  if (uniqueProperty) {
    const seen = new Set<TData>();
    collection = collection.filter((item) => {
      const value = item[uniqueProperty];
      if (seen.has(value)) {
        return false;
      }
      seen.add(value);
      return true;
    });
  }

  // Create the restructured pages
  const restructuredPages = Array.from({ length: pageCount }, (_, i) => ({
    ...infiniteData.pages[i],
    [collectionName]: collection.slice(i * pageSize, (i + 1) * pageSize),
  })).filter((page) => page[collectionName].length > 0); // Remove empty pages

  return {
    pageParams: pageParams.slice(0, restructuredPages.length),
    pages: restructuredPages,
  };
};

export const updateFields = <TCollection, TData>(
  data: InfiniteData<TCollection>,
  updatedItem: Partial<TData>,
  collectionName: string,
  identifierField: keyof TData,
  callback?: (newItem: TData) => void,
): InfiniteData<TCollection> => {
  const newData = JSON.parse(JSON.stringify(data)) as InfiniteData<TCollection>;
  const { pageIndex, index } = findPage<TCollection>(newData, (page) =>
    page[collectionName].findIndex(
      (item: TData) => item[identifierField] === updatedItem[identifierField],
    ),
  );

  if (pageIndex !== -1 && index !== -1) {
    const deleted = newData.pages[pageIndex][collectionName].splice(index, 1);
    const oldItem = deleted[0];
    const newItem = {
      ...oldItem,
      ...updatedItem,
      updatedAt: new Date().toISOString(),
    };
    if (callback) {
      callback(newItem);
    }
    newData.pages[0][collectionName].unshift(newItem);
  }

  return newData;
};

type UpdateCacheListOptions<TData> = {
  queryClient: QueryClient;
  queryKey: unknown[];
  searchProperty: keyof TData;
  updateData: Partial<TData>;
  searchValue: unknown;
};

export function updateCacheList<TData>({
  queryClient,
  queryKey,
  searchProperty,
  updateData,
  searchValue,
}: UpdateCacheListOptions<TData>) {
  queryClient.setQueryData<TData[]>(queryKey, (oldData) => {
    if (!oldData) {
      return oldData;
    }

    return oldData.map((item) =>
      item[searchProperty] === searchValue ? { ...item, ...updateData } : item,
    );
  });
}

export function addToCacheList<TData>(
  queryClient: QueryClient,
  queryKey: unknown[],
  newItem: TData,
) {
  queryClient.setQueryData<TData[]>(queryKey, (oldData) => {
    if (!oldData) {
      return [newItem];
    }
    return [...oldData, newItem];
  });
}

export function removeFromCacheList<TData>(
  queryClient: QueryClient,
  queryKey: unknown[],
  searchProperty: keyof TData,
  searchValue: unknown,
) {
  queryClient.setQueryData<TData[]>(queryKey, (oldData) => {
    if (!oldData) {
      return oldData;
    }
    return oldData.filter((item) => item[searchProperty] !== searchValue);
  });
}