/**
 * useApiWithErrorHandling - Automatic API Error Integration
 *
 * Provides a wrapper hook that automatically:
 * - Shows errors in ErrorContext
 * - Handles network errors gracefully
 * - Provides retry functionality
 * - Tracks loading states
 */

import { useCallback, useState, useRef } from 'react';
import { ApiResponse, ApiError } from '@/types';
import { AppError } from '@/types/errors';
import { createErrorFromApi, createNetworkError } from '@/services/errorHandler';
import { useShowErrorSafe } from '@/contexts/ErrorContext';
import { isNetworkError, isTimeoutError, toApiError } from '@/utils/networkErrorRecovery';

/**
 * Options for API call execution
 */
interface ApiCallOptions {
  /** Show error in ErrorContext (default: true) */
  showError?: boolean;
  /** Auto-dismiss error after timeout (default: based on severity) */
  autoDismiss?: boolean;
  /** Custom error message override */
  errorMessage?: string;
  /** Context data for error logging */
  context?: Record<string, unknown>;
  /** Callback on retry */
  onRetry?: () => void;
  /** Callback on error dismiss */
  onDismiss?: () => void;
  /** Callback on success */
  onSuccess?: () => void;
  /** Callback on error */
  onError?: (error: AppError) => void;
}

/**
 * Result from useApiCall hook
 */
interface UseApiCallResult<T> {
  /** Execute the API call */
  execute: () => Promise<ApiResponse<T>>;
  /** Loading state */
  isLoading: boolean;
  /** Error from last call (if any) */
  error: AppError | null;
  /** Data from last successful call */
  data: T | null;
  /** Reset state */
  reset: () => void;
  /** Retry last call */
  retry: () => Promise<ApiResponse<T>>;
}

/**
 * Hook for executing API calls with automatic error handling
 *
 * @param apiCall - Function that returns ApiResponse
 * @param options - Configuration options
 * @returns Object with execute function, state, and utilities
 *
 * @example
 * function MyComponent() {
 *   const { execute, isLoading, error, data } = useApiCall(
 *     () => api.getBeneficiary(id),
 *     { onSuccess: () => console.log('Loaded!') }
 *   );
 *
 *   useEffect(() => {
 *     execute();
 *   }, []);
 *
 *   if (isLoading) return <Loading />;
 *   if (error) return <ErrorMessage error={error} />;
 *   return <BeneficiaryView data={data} />;
 * }
 */
export function useApiCall<T>(
  apiCall: () => Promise<ApiResponse<T>>,
  options: ApiCallOptions = {}
): UseApiCallResult<T> {
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<AppError | null>(null);
  const [data, setData] = useState<T | null>(null);
  const showError = useShowErrorSafe();
  const lastCallRef = useRef(apiCall);

  // Update ref when apiCall changes
  lastCallRef.current = apiCall;

  const execute = useCallback(async (): Promise<ApiResponse<T>> => {
    setIsLoading(true);
    setError(null);

    try {
      const response = await lastCallRef.current();

      if (response.ok && response.data !== undefined) {
        setData(response.data);
        options.onSuccess?.();
        return response;
      }

      // Handle API error
      const apiError = response.error || { message: options.errorMessage || 'Request failed' };
      const appError = createErrorFromApi(apiError, options.context);

      setError(appError);
      options.onError?.(appError);

      // Show error in ErrorContext if enabled
      if (options.showError !== false && showError) {
        showError(appError, {
          autoDismiss: options.autoDismiss,
          onRetry: options.onRetry,
          onDismiss: options.onDismiss,
        });
      }

      return response;
    } catch (err) {
      // Handle exceptions (network errors, etc.)
      let appError: AppError;

      if (isTimeoutError(err)) {
        appError = createNetworkError('Request timed out. Please try again.', true);
      } else if (isNetworkError(err)) {
        appError = createNetworkError('Network error. Please check your connection.');
      } else {
        const apiError = toApiError(err);
        appError = createErrorFromApi(apiError, options.context);
      }

      setError(appError);
      options.onError?.(appError);

      // Show error in ErrorContext if enabled
      if (options.showError !== false && showError) {
        showError(appError, {
          autoDismiss: options.autoDismiss ?? true,
          onRetry: options.onRetry,
          onDismiss: options.onDismiss,
        });
      }

      return { ok: false, error: toApiError(err) };
    } finally {
      setIsLoading(false);
    }
  }, [options, showError]);

  const reset = useCallback(() => {
    setIsLoading(false);
    setError(null);
    setData(null);
  }, []);

  const retry = useCallback(() => {
    return execute();
  }, [execute]);

  return {
    execute,
    isLoading,
    error,
    data,
    reset,
    retry,
  };
}

/**
 * Hook for executing multiple API calls with unified error handling
 *
 * @example
 * const { executeAll, isLoading, errors } = useMultipleApiCalls();
 *
 * const results = await executeAll([
 *   () => api.getBeneficiaries(),
 *   () => api.getProfile(),
 * ]);
 */
export function useMultipleApiCalls() {
  const [isLoading, setIsLoading] = useState(false);
  const [errors, setErrors] = useState<AppError[]>([]);
  const showError = useShowErrorSafe();

  const executeAll = useCallback(
    async <T extends unknown[]>(
      calls: Array<() => Promise<ApiResponse<any>>>,
      options: ApiCallOptions = {}
    ): Promise<Array<ApiResponse<any>>> => {
      setIsLoading(true);
      setErrors([]);

      try {
        const results = await Promise.all(calls.map(call => call()));
        const newErrors: AppError[] = [];

        results.forEach((result, index) => {
          if (!result.ok && result.error) {
            const appError = createErrorFromApi(result.error, {
              ...options.context,
              callIndex: index,
            });
            newErrors.push(appError);
          }
        });

        if (newErrors.length > 0) {
          setErrors(newErrors);

          // Show first error in ErrorContext
          if (options.showError !== false && showError && newErrors[0]) {
            showError(newErrors[0], {
              autoDismiss: options.autoDismiss,
            });
          }

          options.onError?.(newErrors[0]);
        } else {
          options.onSuccess?.();
        }

        return results;
      } catch (err) {
        const appError = createNetworkError(
          err instanceof Error ? err.message : 'Multiple requests failed'
        );
        setErrors([appError]);

        if (options.showError !== false && showError) {
          showError(appError, { autoDismiss: true });
        }

        options.onError?.(appError);
        return calls.map(() => ({ ok: false, error: toApiError(err) }));
      } finally {
        setIsLoading(false);
      }
    },
    [showError]
  );

  const reset = useCallback(() => {
    setIsLoading(false);
    setErrors([]);
  }, []);

  return {
    executeAll,
    isLoading,
    errors,
    hasErrors: errors.length > 0,
    reset,
  };
}

/**
 * Hook for mutation operations (create, update, delete)
 * Provides optimistic updates and rollback on error
 *
 * @example
 * const { mutate, isLoading } = useMutation(
 *   (name: string) => api.updateBeneficiary(id, { name }),
 *   {
 *     onSuccess: () => toast.success('Updated!'),
 *     onError: (error) => console.error(error),
 *   }
 * );
 *
 * const handleSave = async () => {
 *   await mutate('New Name');
 * };
 */
export function useMutation<TData, TVariables>(
  mutationFn: (variables: TVariables) => Promise<ApiResponse<TData>>,
  options: ApiCallOptions & {
    /** Called before mutation starts */
    onMutate?: (variables: TVariables) => void | Promise<void>;
    /** Called when mutation succeeds */
    onSuccess?: (data: TData, variables: TVariables) => void | Promise<void>;
    /** Called when mutation fails */
    onError?: (error: AppError, variables: TVariables) => void | Promise<void>;
    /** Called after mutation completes (success or error) */
    onSettled?: (data: TData | undefined, error: AppError | null, variables: TVariables) => void | Promise<void>;
  } = {}
) {
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<AppError | null>(null);
  const [data, setData] = useState<TData | null>(null);
  const showError = useShowErrorSafe();

  const mutate = useCallback(
    async (variables: TVariables): Promise<ApiResponse<TData>> => {
      setIsLoading(true);
      setError(null);

      try {
        // Call onMutate for optimistic updates
        await options.onMutate?.(variables);

        const response = await mutationFn(variables);

        if (response.ok && response.data !== undefined) {
          setData(response.data);
          await options.onSuccess?.(response.data, variables);
          await options.onSettled?.(response.data, null, variables);
          return response;
        }

        // Handle error
        const apiError = response.error || { message: 'Mutation failed' };
        const appError = createErrorFromApi(apiError, options.context);

        setError(appError);
        await options.onError?.(appError, variables);
        await options.onSettled?.(undefined, appError, variables);

        // Show error if enabled
        if (options.showError !== false && showError) {
          showError(appError, {
            autoDismiss: options.autoDismiss,
            onRetry: () => mutate(variables),
          });
        }

        return response;
      } catch (err) {
        const appError = createNetworkError(
          err instanceof Error ? err.message : 'Mutation failed'
        );

        setError(appError);
        await options.onError?.(appError, variables);
        await options.onSettled?.(undefined, appError, variables);

        if (options.showError !== false && showError) {
          showError(appError, { autoDismiss: true });
        }

        return { ok: false, error: toApiError(err) };
      } finally {
        setIsLoading(false);
      }
    },
    [mutationFn, options, showError]
  );

  const reset = useCallback(() => {
    setIsLoading(false);
    setError(null);
    setData(null);
  }, []);

  return {
    mutate,
    isLoading,
    error,
    data,
    reset,
    isError: error !== null,
    isSuccess: data !== null && error === null,
  };
}

// Export all hooks
export default useApiCall;