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import { useEffect, useState } from "react";
import { useNavigate } from "react-router-dom";
import { FadeLoader } from "react-spinners";
import { io } from "socket.io-client";
import CityMap from "../components/CityMap";
import Header from "../components/Header";
import Sidebar from "../components/Sidebar";
import API_URL from "../config";
import "../styles/dashboard.css";
import type { ErrorResponse } from "../types/error";
import type { AuthorizedUser } from "../types/login";
import type { Robot, RobotsResponse } from "../types/robot";
function Dashboard() {
const [errorMessage, setErrorMessage] = useState<string>("");
const [isLoading, setIsLoading] = useState<boolean>(true);
const [isSimulationActive, setIsSimulationActive] =
useState<boolean>(false);
const [robots, setRobots] = useState<Robot[]>([]);
const navigate = useNavigate();
const userString = localStorage.getItem("user");
const user: AuthorizedUser = userString ? JSON.parse(userString) : null;
const token = localStorage.getItem("token-robot-tracker");
async function handleLogout() {
localStorage.removeItem("token-robot-tracker");
localStorage.removeItem("user");
// setIsSimulationActive(false);
navigate("/login", { replace: true });
}
// Request robot data from backend on component mount
useEffect(() => {
// Additional safety check to protect this page from unauthorized access
if (!token || token === "undefined" || token === "null") {
navigate("/login");
return;
}
async function fetchRobots() {
try {
setIsLoading(true);
const response = await fetch(`${API_URL}/robots`, {
method: "GET",
headers: {
Authorization: `Bearer ${token}`,
"Content-Type": "application/json",
},
});
if (!response.ok) {
const errorData: ErrorResponse = await response.json();
throw new Error(
errorData.message ||
`Failed to load the robots: ${response.status}`
);
}
const data: RobotsResponse = await response.json();
setRobots(data.robots);
setIsSimulationActive(data.simulationRunning);
} catch (error) {
console.error("Failed to load the robots:", error);
if (error instanceof Error) {
setErrorMessage(error.message);
} else {
setErrorMessage("An unexpected error occurred.");
}
} finally {
setIsLoading(false);
}
}
fetchRobots();
// Establish WebSocket connection to backend
const socket = io(API_URL);
// Listen for real-time robot updates
socket.on("robots_update", ({ updatedRobots }) => {
setRobots(updatedRobots);
});
// Cleanup when component unmounts
return () => {
socket.disconnect();
};
}, [token, navigate]);
return isLoading ? (
<FadeLoader />
) : (
<div className="dashboard-page">
<Header user={user} logout={handleLogout} />
<CityMap robots={robots} />
<Sidebar
activeSimulation={isSimulationActive}
errorMessage={errorMessage}
robots={robots}
token={token}
setActiveSimulation={setIsSimulationActive}
setErrorMessage={setErrorMessage}
setRobots={setRobots}
/>
</div>
);
}
export default Dashboard;
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