/**
 * useCSVHandling Hook - Manages CSV upload and download operations
 */

import { useState, useCallback } from 'react';
import axios from 'axios';
import { useAppDispatch } from '../stores/hooks';
import type { AsyncThunk } from '@reduxjs/toolkit';
import { logger } from '../lib/logger';

interface UseCSVHandlingReturn {
  csvFile: File | null;
  setCsvFile: (file: File | null) => void;
  isModalActive: boolean;
  setIsModalActive: (active: boolean) => void;
  isUploading: boolean;
  isDownloading: boolean;
  downloadCSV: () => Promise<void>;
  uploadCSV: () => Promise<void>;
  error: string | null;
}

interface UseCSVHandlingOptions {
  endpoint: string;
  uploadAction: AsyncThunk<
    { imported: number },
    File,
    { rejectValue: unknown }
  >;
  setRefetchAction: (value: boolean) => { type: string; payload: boolean };
  fileName?: string;
}

/**
 * Hook for handling CSV upload and download operations
 *
 * @param options - Configuration options
 * @returns CSV handling state and functions
 *
 * @example
 * ```typescript
 * const {
 *   csvFile,
 *   setCsvFile,
 *   isModalActive,
 *   setIsModalActive,
 *   downloadCSV,
 *   uploadCSV
 * } = useCSVHandling({
 *   endpoint: 'users',
 *   uploadAction: uploadCsv,
 *   setRefetchAction: setRefetch
 * })
 * ```
 */
export function useCSVHandling(
  options: UseCSVHandlingOptions,
): UseCSVHandlingReturn {
  const { endpoint, uploadAction, setRefetchAction, fileName } = options;
  const dispatch = useAppDispatch();

  const [csvFile, setCsvFile] = useState<File | null>(null);
  const [isModalActive, setIsModalActive] = useState(false);
  const [isUploading, setIsUploading] = useState(false);
  const [isDownloading, setIsDownloading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const downloadCSV = useCallback(async () => {
    setIsDownloading(true);
    setError(null);

    try {
      const response = await axios({
        url: `${endpoint}?filetype=csv`,
        method: 'GET',
        responseType: 'blob',
      });

      const contentType = (response.headers['content-type'] as string) || 'text/csv';
      const blob = new Blob([response.data], { type: contentType });
      const link = document.createElement('a');
      link.href = window.URL.createObjectURL(blob);
      link.download = fileName || `${endpoint}.csv`;
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      window.URL.revokeObjectURL(link.href);
    } catch (err) {
      const message =
        err instanceof Error ? err.message : 'Failed to download CSV';
      setError(message);
      logger.error(
        'CSV download error:',
        err instanceof Error ? err : { error: err },
      );
    } finally {
      setIsDownloading(false);
    }
  }, [endpoint, fileName]);

  const uploadCSV = useCallback(async () => {
    if (!csvFile) {
      setError('No file selected');
      return;
    }

    setIsUploading(true);
    setError(null);

    try {
      await dispatch(uploadAction(csvFile)).unwrap();
      dispatch(setRefetchAction(true));
      setCsvFile(null);
      setIsModalActive(false);
    } catch (err) {
      const message =
        err instanceof Error ? err.message : 'Failed to upload CSV';
      setError(message);
      logger.error(
        'CSV upload error:',
        err instanceof Error ? err : { error: err },
      );
    } finally {
      setIsUploading(false);
    }
  }, [csvFile, dispatch, uploadAction, setRefetchAction]);

  return {
    csvFile,
    setCsvFile,
    isModalActive,
    setIsModalActive,
    isUploading,
    isDownloading,
    downloadCSV,
    uploadCSV,
    error,
  };
}

export default useCSVHandling;