'use client'

import { Button } from '@langgenius/dify-ui/button'
import { RiAddLine } from '@remixicon/react'
import * as React from 'react'
import { useEffect, useState } from 'react'
import { useTranslation } from 'react-i18next'
import Input from '@/app/components/base/input'
import { useExternalKnowledgeApi } from '@/context/external-knowledge-api-context'
import { useModalContext } from '@/context/modal-context'
import { useRouter } from '@/next/navigation'
import ExternalApiSelect from './ExternalApiSelect'

type ExternalApiSelectionProps = {
  external_knowledge_api_id: string
  external_knowledge_id: string
  onChange: (data: { external_knowledge_api_id?: string, external_knowledge_id?: string }) => void
}

const ExternalApiSelection: React.FC<ExternalApiSelectionProps> = ({ external_knowledge_api_id, external_knowledge_id, onChange }) => {
  const { t } = useTranslation()
  const router = useRouter()
  const { externalKnowledgeApiList } = useExternalKnowledgeApi()
  const [selectedApiId, setSelectedApiId] = useState(external_knowledge_api_id)
  const { setShowExternalKnowledgeAPIModal } = useModalContext()
  const { mutateExternalKnowledgeApis } = useExternalKnowledgeApi()

  const apiItems = externalKnowledgeApiList.map(api => ({
    value: api.id,
    name: api.name,
    url: api.settings.endpoint,
  }))

  useEffect(() => {
    if (apiItems.length > 0) {
      const newSelectedId = external_knowledge_api_id || apiItems[0]!.value
      setSelectedApiId(newSelectedId)
      if (newSelectedId !== external_knowledge_api_id)
        onChange({ external_knowledge_api_id: newSelectedId, external_knowledge_id })
    }
  }, [apiItems, external_knowledge_api_id, external_knowledge_id, onChange])

  const handleAddNewAPI = () => {
    setShowExternalKnowledgeAPIModal({
      payload: { name: '', settings: { endpoint: '', api_key: '' } },
      onSaveCallback: async () => {
        mutateExternalKnowledgeApis()
        router.refresh()
      },
      onCancelCallback: () => {
        mutateExternalKnowledgeApis()
      },
      isEditMode: false,
    })
  }

  useEffect(() => {
    if (!external_knowledge_api_id && apiItems.length > 0)
      onChange({ external_knowledge_api_id: apiItems[0]!.value, external_knowledge_id })
  }, [])

  return (
    <form className="flex flex-col gap-4 self-stretch">
      <div className="flex flex-col gap-1 self-stretch">
        <div className="flex flex-col self-stretch">
          <label className="system-sm-semibold text-text-secondary">{t('externalAPIPanelTitle', { ns: 'dataset' })}</label>
        </div>
        {apiItems.length > 0
          ? (
              <ExternalApiSelect
                items={apiItems}
                value={selectedApiId}
                onSelect={(e) => {
                  setSelectedApiId(e.value)
                  onChange({ external_knowledge_api_id: e.value, external_knowledge_id })
                }}
              />
            )
          : (
              <Button variant="tertiary" onClick={handleAddNewAPI} className="justify-start gap-0.5">
                <RiAddLine className="size-4 text-text-tertiary" />
                <span className="system-sm-regular text-text-tertiary">{t('noExternalKnowledge', { ns: 'dataset' })}</span>
              </Button>
            )}
      </div>
      <div className="flex flex-col gap-1 self-stretch">
        <div className="flex flex-col self-stretch">
          <label className="system-sm-semibold text-text-secondary">{t('externalKnowledgeId', { ns: 'dataset' })}</label>
        </div>
        <Input
          value={external_knowledge_id}
          onChange={e => onChange({ external_knowledge_id: e.target.value, external_knowledge_api_id })}
          placeholder={t('externalKnowledgeIdPlaceholder', { ns: 'dataset' }) ?? ''}
        />
      </div>
    </form>
  )
}

export default ExternalApiSelection