"use client"
import React, { useEffect, useState } from "react"
import * as smd from "streaming-markdown"

interface AiSearchProps {
	searchQuery: string
}

const AiSearch: React.FC<AiSearchProps> = (props: { searchQuery: string }) => {
	const [error, setError] = useState<string>("")

	let root_el = React.useRef<HTMLDivElement | null>(null)

	let [parser, md_el] = React.useMemo(() => {
		let md_el = document.createElement("div")
		let renderer = smd.default_renderer(md_el)
		let parser = smd.parser(renderer)
		return [parser, md_el]
	}, [])

	useEffect(() => {
		if (root_el.current) {
			root_el.current.appendChild(md_el)
		}
	}, [md_el])

	useEffect(() => {
		let question = props.searchQuery

		fetchData()
		async function fetchData() {
			let response: Response
			try {
				response = await fetch("/api/search-stream", {
					method: "POST",
					headers: {
						"Content-Type": "application/json"
					},
					body: JSON.stringify({ question: question })
				})
			} catch (error) {
				console.error("Error fetching data:", error)
				setError("Error fetching data")
				return
			}

			if (!response.body) {
				console.error("Response has no body")
				setError("Response has no body")
				return
			}

			const reader = response.body.getReader()
			const decoder = new TextDecoder()

			while (true) {
				let res = await reader.read()

				if (res.value) {
					let text = decoder.decode(res.value)
					smd.parser_write(parser, text)
				}

				if (res.done) {
					smd.parser_end(parser)
					break
				}
			}
		}
	}, [props.searchQuery, parser])

	return (
		<div className="mx-auto flex max-w-3xl flex-col items-center">
			<div className="w-full rounded-lg bg-inherit p-6 text-black dark:text-white">
				<div className="mb-6 rounded-lg bg-blue-700 p-4 text-white">
					<h2 className="text-lg font-medium">✨ This is what I have found:</h2>
				</div>
				<div className="rounded-xl bg-neutral-100 p-4 dark:bg-[#121212]" ref={root_el}></div>
			</div>
			<p className="text-md pb-5 font-semibold opacity-50">{error}</p>
			<button className="text-md rounded-2xl bg-neutral-300 px-6 py-3 font-semibold text-opacity-50 shadow-inner shadow-neutral-400/50 transition-colors hover:bg-neutral-700 dark:bg-neutral-800 dark:shadow-neutral-700/50">
				Ask Community
			</button>
		</div>
	)
}

export default AiSearch