if (localStorage.getItem("DONOTSHARE-secretkey") !== null) {
    window.location.replace("/app")
    document.body.innerHTML = "Redirecting..."
    throw new Error();
}
if (localStorage.getItem("DONOTSHARE-password") !== null) {
    window.location.replace("/app")
    document.body.innerHTML = "Redirecting..."
    throw new Error();
}

let usernameBox = document.getElementById("usernameBox")
let passwordBox = document.getElementById("passwordBox")
let statusBox = document.getElementById("statusBox")
let signupButton = document.getElementById("signupButton")

function showElements(yesorno) {
    if (!yesorno) {
        usernameBox.classList.add("hidden")
        passwordBox.classList.add("hidden")
        signupButton.classList.add("hidden")
    }
    else {
        usernameBox.classList.remove("hidden")
        passwordBox.classList.remove("hidden")
        signupButton.classList.remove("hidden")
    }
}

signupButton.addEventListener("click", (event) => {
    async function doStuff() {
        let username = usernameBox.value
        let password = passwordBox.value

        if (username == "") {
            statusBox.innerText = "A username is required!"
            return
        }
        if ((username).length > 20) {
            statusBox.innerText = "Username cannot be more than 20 characters!"
            return
        }
        if (password == "") {
            statusBox.innerText = "A password is required!"
            return
        }
        if ((password).length < 8) {
            statusBox.innerText = "8 or more characters are required!"
            return
        }

        showElements(false)
        statusBox.innerText = "Creating account, please hold on..."

        async function hashpass(pass) {
            /* Very hacky solution to sha3 with 128 iterations */
            const key = await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(await hashwasm.sha3(pass))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))));
            return key
        };

        fetch("/api/signup", {
            method: "POST",
            body: JSON.stringify({
                username: username,
                password: await hashpass(password)
            }),
            headers: {
                "Content-type": "application/json; charset=UTF-8"
            }
        })
            .then((response) => response)
            .then((response) => {
                async function doStuff() {
                    let responseData = await response.json()

                    if (response.status == 200) {
                        statusBox.innerText == "redirecting.."
                        localStorage.setItem("DONOTSHARE-secretkey", responseData["key"])
                        localStorage.setItem("DONOTSHARE-password", await hashwasm.sha512(password))

                        window.location.href = "/app"
                    }
                    else if (response.status == 409) {
                        statusBox.innerText = "Username already taken!"
                        showElements(true)
                    }
                    else {
                        statusBox.innerText = "Something went wrong!"
                        showElements(true)
                    }
                }
                doStuff()
            });
    }
    doStuff()
});