Application-Web/src/pages/template/Header.tsx

import AccountSvg from "../../assets/account.svg?react"
import "../../style/template/header.css"
import { startTransition, useEffect, useState } from "react"
import { fetchAPIGet } from "../../Fetcher.ts"
import { getSession, saveSession } from "../../api/session.ts"
import { useNavigate } from "react-router-dom"

export function Header() {
    const session = getSession()
    const [username, setUsername] = useState<string | null>(
        session.username ?? null,
    )

    const navigate = useNavigate()

    useEffect(() => {
        async function loadUsername() {
            const response = await fetchAPIGet("user", false)

            if (response.status == 401) {
                //if unauthorized
                return
            }

            //TODO check if the response is ok and handle errors
            const { name: username } = await response.json()
            saveSession({ ...session, username })
            setUsername(username)
        }

        // if the user is authenticated and the username is not already present in the session,
        if (session.auth && !session.username) loadUsername()
    }, [session])

    return (
        <div id="header">
            <div id="header-left"></div>
            <div id="header-center">
                <p
                    id="iqball"
                    className="clickable"
                    onClick={() => startTransition(() => navigate("/"))}>
                    IQBall
                </p>
            </div>
            <div id="header-right">
                <div
                    className="clickable"
                    id="clickable-header-right"
                    onClick={() => {
                        if (username) {
                            startTransition(() => {
                                navigate("/settings")
                            })
                            return
                        }
                        saveSession({
                            ...session,
                            urlTarget: location.pathname,
                        })

                        startTransition(() => {
                            navigate("/login")
                        })
                    }}>
                    {/* <AccountSvg id="img-account" /> */}
                    <AccountSvg id="img-account" />
                    <p id="username">{username ?? "Log In"}</p>
                </div>
            </div>
        </div>
    )
}