import React, { ChangeEvent, useCallback, useState, useRef } from 'react'

import { Input } from '@janhq/joi'
import { SearchIcon } from 'lucide-react'

import { useDebouncedCallback } from 'use-debounce'

import {
  useGetModelSources,
  useModelSourcesMutation,
} from '@/hooks/useModelSource'

import Spinner from '../Loader/Spinner'

type Props = {
  onSearchLocal?: (searchText: string) => void
}

const ModelSearch = ({ onSearchLocal }: Props) => {
  const [searchText, setSearchText] = useState('')
  const [isSearching, setSearching] = useState(false)
  const { mutate } = useGetModelSources()
  const { addModelSource } = useModelSourcesMutation()
  const inputRef = useRef<HTMLInputElement | null>(null)
  const debounced = useDebouncedCallback(async () => {
    if (searchText.indexOf('/') === -1) {
      // If we don't find / in the text, perform a local search
      onSearchLocal?.(searchText)
      return
    }
    // Attempt to search local
    onSearchLocal?.(searchText)

    setSearching(true)
    // Attempt to search model source
    addModelSource(searchText)
      .then(() => mutate())
      .then(() => onSearchLocal?.(searchText))
      .catch((e) => {
        console.debug(e)
      })
      .finally(() => setSearching(false))
  }, 300)

  const onSearchChanged = useCallback(
    (e: ChangeEvent<HTMLInputElement>) => {
      e.preventDefault()
      e.stopPropagation()
      setSearchText(e.target.value)
      debounced()
    },
    [debounced]
  )

  const onClear = useCallback(() => {
    setSearchText('')
    debounced()
  }, [debounced])

  const onKeyDown = useCallback(
    (e: React.KeyboardEvent<HTMLInputElement>) => {
      if (e.key === 'Enter' && !e.shiftKey && !e.nativeEvent.isComposing) {
        e.preventDefault()
        debounced()
      }
    },
    [debounced]
  )

  return (
    <Input
      ref={inputRef}
      prefixIcon={
        isSearching ? (
          <Spinner size={16} strokeWidth={2} />
        ) : (
          <SearchIcon size={16} />
        )
      }
      placeholder="Search or enter Hugging Face URL"
      onChange={onSearchChanged}
      onKeyDown={onKeyDown}
      value={searchText}
      clearable={searchText.length > 0}
      onClear={onClear}
      className="bg-[hsla(var(--app-bg))]"
      onClick={() => {
        onSearchLocal?.(inputRef.current?.value ?? '')
      }}
    />
  )
}

export default ModelSearch