import { ref, type Ref } from 'vue'
import { type ApiRequestError, normalizeError } from '@/services/error'
import { useSnackbarStore } from '@/stores/snackbar'

type ToastLevel = 'info' | 'warning' | 'error'

type Options = {
  showErrorToast?: boolean
  errorToastLevel?: (error: ApiRequestError) => ToastLevel
}

interface UseApiCallResult<TResult, TArgs extends unknown[]> {
  loading: Ref<boolean>
  data: Ref<TResult | null>
  error: Ref<ApiRequestError | null>
  execute: (...args: TArgs) => Promise<TResult>
  executeSafe: (...args: TArgs) => Promise<TResult | null>
  reset: () => void
}

function getDefaultToastLevel(error: ApiRequestError): ToastLevel {
  if (typeof error.status === 'number' && error.status >= 500) return 'error'
  return 'warning'
}

function levelToColor(level: ToastLevel): string {
  if (level === 'error') return 'error'
  if (level === 'warning') return 'warning'
  return 'info'
}

export function useApiCall<TResult, TArgs extends unknown[]>(
  action: (...args: TArgs) => Promise<TResult>,
  options?: Options
): UseApiCallResult<TResult, TArgs> {
  const loading = ref(false)
  const data = ref<TResult | null>(null) as Ref<TResult | null>
  const error = ref<ApiRequestError | null>(null)

  const snackbar = useSnackbarStore()

  const execute = async (...args: TArgs): Promise<TResult> => {
    loading.value = true
    error.value = null
    try {
      const result = await action(...args)
      data.value = result
      return result
    } catch (error_) {
      const normalized = normalizeError(error_)
      error.value = normalized

      const showErrorToast = options?.showErrorToast ?? true
      if (showErrorToast && normalized.name !== 'CanceledRequestError') {
        const level = (options?.errorToastLevel ?? getDefaultToastLevel)(normalized)
        snackbar.show({
          message: normalized.message,
          color: levelToColor(level),
          timeout: 3000,
          location: 'top right',
          variant: 'flat',
        })
      }

      throw normalized
    } finally {
      loading.value = false
    }
  }

  const executeSafe = async (...args: TArgs): Promise<TResult | null> => {
    try {
      return await execute(...args)
    } catch {
      return null
    }
  }

  const reset = () => {
    loading.value = false
    data.value = null
    error.value = null
  }

  return {
    loading,
    data,
    error,
    execute,
    executeSafe,
    reset,
  }
}