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import type { FC } from 'react'
import { useState } from 'react'
import type {
  DefaultModel,
  Model,
  ModelItem,
} from '../declarations'
import { useCurrentProviderAndModel } from '../hooks'
import ModelTrigger from './model-trigger'
import EmptyTrigger from './empty-trigger'
import DeprecatedModelTrigger from './deprecated-model-trigger'
import Popup from './popup'
import {
  PortalToFollowElem,
  PortalToFollowElemContent,
  PortalToFollowElemTrigger,
} from '@/app/components/base/portal-to-follow-elem'

type ModelSelectorProps = {
  defaultModel?: DefaultModel
  modelList: Model[]
  triggerClassName?: string
  popupClassName?: string
  onSelect?: (model: DefaultModel) => void
  readonly?: boolean
}
const ModelSelector: FC<ModelSelectorProps> = ({

  defaultModel,

  modelList,

  triggerClassName,

  popupClassName,

  onSelect,

  readonly,

}) => {
  const [open, setOpen] = useState(false)
  const {
    currentProvider,
    currentModel,
  } = useCurrentProviderAndModel(
    modelList,
    defaultModel,
  )

  const handleSelect = (provider: string, model: ModelItem) => {
    setOpen(false)

    if (onSelect)
      onSelect({ provider, model: model.model })
  }

  const handleToggle = () => {
    if (readonly)
      return

    setOpen(v => !v)
  }

  return (
    <PortalToFollowElem

      open={open}

      onOpenChange={setOpen}

      placement='bottom-start'

      offset={4}

    >

      <div className='relative'>

        <PortalToFollowElemTrigger

          onClick={handleToggle}

          className='block'

        >

          {

            currentModel && currentProvider && (

              <ModelTrigger

                open={open}

                provider={currentProvider}

                model={currentModel}

                className={triggerClassName}

                readonly={readonly}

              />

            )

          }

          {

            !currentModel && defaultModel && (

              <DeprecatedModelTrigger

                modelName={defaultModel?.model || ''}

                providerName={defaultModel?.provider || ''}

                className={triggerClassName}

              />

            )

          }

          {

            !defaultModel && (

              <EmptyTrigger

                open={open}

                className={triggerClassName}

              />

            )

          }

        </PortalToFollowElemTrigger>

        <PortalToFollowElemContent className={`z-[1002] ${popupClassName}`}>

          <Popup

            defaultModel={defaultModel}

            modelList={modelList}

            onSelect={handleSelect}

          />

        </PortalToFollowElemContent>

      </div>

    </PortalToFollowElem>
  )
}

export default ModelSelector