// Attempt to log in using ambient authority (e.g., Kerberos, SSL, etc)
async function tryLoginAmbient() {
    let resp = await fetch("/login/krb5" + window.location.search, {method: "POST", redirect: "manual"})
    if (resp.ok) {
        window.location = await resp.text()
    }
}

async function tryLoginPassword() {
    let userField = document.getElementById("user")
    let passwordField = document.getElementById("password")
    let doit = document.getElementById("doit")
    try {
        userField.enabled = passwordField.enabled = doit.enabled = false
        let resp = await fetch("/login/password" + window.location.search, {method: "POST"})
        if (resp.ok) {
            window.location = await resp.text()
        }
    } catch (e) {
        userField.enabled = passwordField.enabled = doit.enabled = true
        throw e
    }
}

tryLoginAmbient() // don't bother awaiting, just let 'er go
document.addEventListener("load", () => {
    document.getElementById("doit").form.addEventListener("submit", function (e) {
        e.preventDefault()
        tryLoginPassword()
        return false
    })
})