import type {
  ColumnDef,
  PaginationState,
  SortingState,
  VisibilityState,
} from "@tanstack/react-table";
import {
  getCoreRowModel,
  getFilteredRowModel,
  getPaginationRowModel,
  getSortedRowModel,
  useReactTable,
} from "@tanstack/react-table";
import { useEffect, useMemo, useState } from "react";

import type { EntityColumn } from "../components/entity-list";
import {
  readColumnVisibility,
  writeColumnVisibility,
} from "../lib/entity-column-visibility-storage";
import { ENTITY_PAGE_SIZES, entityListRange } from "../lib/entity-list";

const ENTITY_PAGE_SIZE_STORAGE_KEY = "entity-page-size";

function storedPageSize(): number {
  if (typeof window === "undefined") {
    return ENTITY_PAGE_SIZES[0];
  }
  try {
    const value = Number(window.localStorage.getItem(ENTITY_PAGE_SIZE_STORAGE_KEY));

    return (ENTITY_PAGE_SIZES as readonly number[]).includes(value) ? value : ENTITY_PAGE_SIZES[0];
  } catch {
    return ENTITY_PAGE_SIZES[0];
  }
}

export function useEntityTable<T extends { id: string }>({
  items,
  columns,
  locale,
  search,
  onSearchChange,
  filterKey,
  columnVisibilityStorageKey,
}: {
  items: readonly T[];
  columns: readonly EntityColumn<T>[];
  locale: string;
  search: string | undefined;
  onSearchChange: ((value: string) => void) | undefined;
  filterKey: string;
  columnVisibilityStorageKey?: string | undefined;
}) {
  const [localSearch, setLocalSearch] = useState("");
  const currentSearch = search ?? localSearch;
  const sortableColumns = columns.filter((column) => column.id !== "actions" && column.value);
  const defaultColumn =
    sortableColumns.find((column) => column.defaultSort) ??
    sortableColumns.find((column) => column.id === "name") ??
    sortableColumns[0];
  const initialSorting: SortingState = defaultColumn
    ? [{ id: defaultColumn.id, desc: defaultColumn.defaultSort === "desc" }]
    : [];
  const [sorting, setSorting] = useState<SortingState>(initialSorting);
  const [visibility, setVisibility] = useState<VisibilityState>(() =>
    readColumnVisibility(columnVisibilityStorageKey)
  );
  const [previousStorageKey, setPreviousStorageKey] = useState(columnVisibilityStorageKey);

  if (previousStorageKey !== columnVisibilityStorageKey) {
    setPreviousStorageKey(columnVisibilityStorageKey);
    setVisibility(readColumnVisibility(columnVisibilityStorageKey));
  }
  useEffect(() => {
    if (previousStorageKey === columnVisibilityStorageKey) {
      writeColumnVisibility(columnVisibilityStorageKey, visibility);
    }
  }, [columnVisibilityStorageKey, previousStorageKey, visibility]);
  const [pagination, setPagination] = useState<PaginationState>(() => ({
    pageIndex: 0,
    pageSize: storedPageSize(),
  }));

  useEffect(() => {
    try {
      window.localStorage.setItem(ENTITY_PAGE_SIZE_STORAGE_KEY, String(pagination.pageSize));
    } catch {
      // La paginación sigue funcionando aunque el almacenamiento no esté disponible.
    }
  }, [pagination.pageSize]);
  const resetKey = `${currentSearch}\0${filterKey}`;
  const [previousKey, setPreviousKey] = useState(resetKey);

  if (previousKey !== resetKey) {
    setPreviousKey(resetKey);
    setPagination((previous) => ({ ...previous, pageIndex: 0 }));
  }
  const nameCollator = useMemo(
    () => new Intl.Collator(locale, { sensitivity: "base", numeric: true }),
    [locale]
  );
  const definitions = useMemo<ColumnDef<T>[]>(
    () =>
      columns.map((column) => ({
        id: column.id,
        header: column.label,
        accessorFn: column.value ?? (() => ""),
        sortingFn:
          column.id === "name"
            ? (first, second, columnId) =>
                nameCollator.compare(
                  String(first.getValue(columnId) ?? ""),
                  String(second.getValue(columnId) ?? "")
                )
            : "auto",
        enableSorting: column.id !== "actions" && !!column.value,
        enableGlobalFilter: column.id !== "actions" && !!column.value,
        enableHiding: column.id !== "actions" && column.hideable !== false,
      })),
    [columns, nameCollator]
  );
  const table = useReactTable({
    data: [...items],
    columns: definitions,
    initialState: { sorting: initialSorting },
    enableSortingRemoval: false,
    getRowId: (item) => item.id,
    state: {
      sorting,
      columnVisibility: Object.fromEntries(
        columns.map((column) => [
          column.id,
          column.hideable === false || column.id === "actions"
            ? true
            : (visibility[column.id] ?? column.defaultVisible ?? true),
        ])
      ),
      columnPinning: {
        right: columns.filter((column) => column.id === "actions").map((column) => column.id),
      },
      pagination,
      globalFilter: onSearchChange ? "" : currentSearch.trim(),
    },
    onSortingChange: setSorting,
    onColumnVisibilityChange: setVisibility,
    onPaginationChange: setPagination,
    autoResetPageIndex: false,
    globalFilterFn: "includesString",
    getCoreRowModel: getCoreRowModel(),
    getFilteredRowModel: getFilteredRowModel(),
    getSortedRowModel: getSortedRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
  });
  const total = table.getFilteredRowModel().rows.length;
  const range = entityListRange(total, pagination.pageIndex, pagination.pageSize);

  // Una actualización puede reducir el conjunto sin cambiar los filtros.
  if (pagination.pageIndex !== range.page) {
    setPagination({ ...pagination, pageIndex: range.page });
  }

  return {
    table,
    total,
    range,
    pagination,
    setPagination,
    sorting,
    setSorting,
    currentSearch,
    setLocalSearch,
  };
}