import SettingsIcon from "@mui/icons-material/Settings";
import { Backdrop, Box, Button, IconButton, Paper } from "@mui/material";
import { useNavigate } from "@tanstack/react-router";
import { useCallback, useEffect, useState } from "react";
import FileUpload from "react-material-file-upload";
import { socket } from "../socket";
import { CircularProgressWithLabel } from "./CircularProgressWithLabel";

export default function UploadPage() {
	const [files, setFiles] = useState<File[]>([]);
	const [pageId, setPageId] = useState<string | null>(null);
	const [loadingState, setLoadingState] = useState<number | null>(null);
	const fileTypes = ["pdf"];
	const navigate = useNavigate();

	const uploadFile = useCallback(async () => {
		const formData = new FormData();
		formData.append("file", files[0]);
		const response = await fetch("http://localhost:5050/api/pitch_book", {
			method: "POST",
			body: formData,
		});

		if (response.ok) {
			console.log("File uploaded successfully");
			const data = await response.json();
			setPageId(data.id.toString());
			setLoadingState(5);
		} else {
			console.error("Failed to upload file");
		}
	}, [files]);

	const onConnection = useCallback(() => {
		console.log("connected");
	}, []);

	const onProgress = useCallback(
		(progress: { id: number; progress: number }) => {
			if (pageId === progress.id.toString()) {
				setLoadingState(progress.progress);

				if (progress.progress === 100) {
					setPageId(null);
					setLoadingState(null);
					navigate({
						to: "/extractedResult/$pitchBook",
						params: { pitchBook: progress.id.toString() },
					});
				}
			}
		},
		[pageId, navigate],
	);

	useEffect(() => {
		socket.on("connect", onConnection);
		socket.on("progress", onProgress);
		return () => {
			socket.off("connect", onConnection);
			socket.off("progress", onProgress);
		};
	}, [onConnection, onProgress]);

	useEffect(() => {
		return () => {
			setPageId(null);
			setLoadingState(null);
		};
	}, []);

	return (
		<>
			<Backdrop
				sx={(theme) => ({ color: "#fff", zIndex: theme.zIndex.drawer + 1 })}
				open={pageId !== null && loadingState !== null && loadingState < 100}
			>
				<CircularProgressWithLabel
					color="inherit"
					value={loadingState || 0}
					size={60}
				/>
			</Backdrop>
			<Box
				display="flex"
				flexDirection="column"
				alignItems="center"
				justifyContent="center"
				height="100vh"
				bgcolor="white"
			>
				<Box
					width="100%"
					maxWidth="1300px"
					display="flex"
					justifyContent="flex-end"
					px={2}
				>
					<IconButton onClick={() => navigate({ to: "/config" })}>
						<SettingsIcon fontSize="large" />
					</IconButton>
				</Box>
				<Paper
					elevation={3}
					sx={{
						width: 900,
						height: 500,
						backgroundColor: "#eeeeee",
						borderRadius: 4,
						display: "flex",
						justifyContent: "center",
						alignItems: "center",
					}}
				>
					<Box
						sx={{
							height: "100%",
							width: "100%",
							maxWidth: "100%",
							margin: "0px",
							padding: "0px",
							"& .MuiBox-root": {
								display: "flex",
								flexDirection: "column",
								alignItems: "center",
								justifyContent: "center",
								border: "none",
								textAlign: "center",
							},
						}}
					>
						<FileUpload
							value={files}
							onChange={setFiles}
							accept={`.${fileTypes.join(", .")}`}
							title="Hier Dokument hinziehen"
							buttonText="Datei auswählen"
							sx={{
								height: "100%",
								width: "100%",
								padding: "0px",
								"& svg": {
									color: "#9e9e9e",
								},
								"& .MuiOutlinedInput-notchedOutline": {
									border: "none",
								},
								"& .MuiButton-root": {
									backgroundColor: "#9e9e9e",
								},
								"& .MuiTypography-root": {
									fontSize: "1.25rem",
									fontWeight: 500,
									marginBottom: 1,
								},
							}}
						/>
					</Box>
				</Paper>
				<Button
					variant="contained"
					sx={{
						mt: 4,
						backgroundColor: "#383838",
					}}
					disabled={files.length === 0}
					onClick={uploadFile}
				>
					Kennzahlen extrahieren
				</Button>
			</Box>
		</>
	);
}