import { useCallback } from 'react'
import { useStore as useAppStore } from '@/app/components/app/store'
import { useWorkflowUpdate } from '@/app/components/workflow/hooks'
import { useWorkflowStore } from '@/app/components/workflow/store'
import { fetchWorkflowDraft } from '@/service/workflow'
import { useWorkflowDraftGraphForCanvas } from './use-workflow-draft-graph-for-canvas'

export const useWorkflowRefreshDraft = () => {
  const appDetail = useAppStore((s) => s.appDetail)
  const workflowStore = useWorkflowStore()
  const { handleUpdateWorkflowCanvas } = useWorkflowUpdate()
  const { getWorkflowDraftGraphForCanvas } = useWorkflowDraftGraphForCanvas(appDetail?.mode)

  const handleRefreshWorkflowDraft = useCallback(
    (notUpdateCanvas?: boolean) => {
      const {
        appId,
        setSyncWorkflowDraftHash,
        setIsSyncingWorkflowDraft,
        setEnvironmentVariables,
        setEnvSecrets,
        setConversationVariables,
        setIsWorkflowDataLoaded,
        isWorkflowDataLoaded,
        debouncedSyncWorkflowDraft,
      } = workflowStore.getState()

      if (
        debouncedSyncWorkflowDraft &&
        typeof (debouncedSyncWorkflowDraft as any).cancel === 'function'
      )
        (debouncedSyncWorkflowDraft as any).cancel()

      const wasLoaded = isWorkflowDataLoaded
      if (wasLoaded) setIsWorkflowDataLoaded(false)
      setIsSyncingWorkflowDraft(true)
      fetchWorkflowDraft(`/apps/${appId}/workflows/draft`)
        .then((response) => {
          // Ensure we have a valid workflow structure with viewport
          if (!notUpdateCanvas)
            handleUpdateWorkflowCanvas(getWorkflowDraftGraphForCanvas(response.graph))
          setSyncWorkflowDraftHash(response.hash)
          setEnvSecrets(
            (response.environment_variables || [])
              .filter((env) => env.value_type === 'secret')
              .reduce(
                (acc, env) => {
                  acc[env.id] = env.value
                  return acc
                },
                {} as Record<string, string>,
              ),
          )
          setEnvironmentVariables(
            response.environment_variables?.map((env) =>
              env.value_type === 'secret' ? { ...env, value: '[__HIDDEN__]' } : env,
            ) || [],
          )
          setConversationVariables(response.conversation_variables || [])
          setIsWorkflowDataLoaded(true)
        })
        .catch(() => {
          if (wasLoaded) setIsWorkflowDataLoaded(true)
        })
        .finally(() => {
          setIsSyncingWorkflowDraft(false)
        })
    },
    [getWorkflowDraftGraphForCanvas, handleUpdateWorkflowCanvas, workflowStore],
  )

  return {
    handleRefreshWorkflowDraft,
  }
}