import { useState } from "react";
import * as tus from "tus-js-client";

interface UploadResult {
	url: string;
	fileId: string;
	// resource: any;
}

export function useTusUpload() {
	const [progress, setProgress] = useState(0);
	const [isUploading, setIsUploading] = useState(false);
	const [uploadError, setUploadError] = useState<string | null>(null);
	const getFileId = (url: string) => {
		const parts = url.split("/");
		// Find the index of the 'upload' segment
		const uploadIndex = parts.findIndex((part) => part === "upload");
		if (uploadIndex === -1 || uploadIndex + 4 >= parts.length) {
			throw new Error("Invalid upload URL format");
		}
		// Get the date parts and file ID (4 segments after 'upload')
		return parts.slice(uploadIndex + 1, uploadIndex + 5).join("/");
	};
	const handleFileUpload = async (
		file: File,
		onSuccess: (result: UploadResult) => void,
		onError: (error: Error) => void
	) => {
		setIsUploading(true);
		setProgress(0);
		setUploadError(null);
		const upload = new tus.Upload(file, {
			endpoint: "http://localhost:3000/upload",
			retryDelays: [0, 1000, 3000, 5000],
			metadata: {
				filename: file.name,
				filetype: file.type,
			},
			onProgress: (bytesUploaded, bytesTotal) => {
				const uploadProgress = (
					(bytesUploaded / bytesTotal) *
					100
				).toFixed(2);
				setProgress(Number(uploadProgress));
			},
			onSuccess: async () => {
				try {
					if (upload.url) {
						const fileId = getFileId(upload.url);
						// const resource = await pollResourceStatus(fileId);
						setIsUploading(false);
						setProgress(100);
						onSuccess({
							url: upload.url,
							fileId,
							// resource,
						});
					}
				} catch (error) {
					const err =
						error instanceof Error
							? error
							: new Error("Unknown error");
					setIsUploading(false);
					setUploadError(err.message);
					onError(err);
				}
			},
			onError: (error) => {
				setIsUploading(false);
				setUploadError(error.message);
				onError(error);
			},
		});
		upload.start();
	};
	return {
		progress,
		isUploading,
		uploadError,
		handleFileUpload,
	};
}