package io.oxygenhub.android.auth

/** A signed-in hub: its address, the account, and the device token. */

data class Session(

    /** `https://oxygenhub.io`, no trailing slash. */

    val hub: String,

    val username: String,

    val token: String,

    /** The scopes the user allowed when approving the device. */

    val scopes: List<String> = emptyList(),

) {

    /**

     * Whether the token may change things (land a proposal): the scope was

     * allowed, or the hub did not say which were (then the hub decides).

     */

    val canWrite: Boolean get() = scopes.isEmpty() || io.oxygenhub.android.api.WriteScope in scopes

    // The token never reaches a log through toString.

    override fun toString(): String = "Session(hub=$hub, username=$username, scopes=$scopes, token=<redacted>)"

}

/** Where the session is kept between launches. */

interface SessionStore {

    fun load(): Session?

    fun save(session: Session)

    fun clear()

    /** The hub last signed in to (or typed), so the sign-in screen offers it again. */

    var lastHub: String?

}

/** A store in memory, for tests and previews. */

class MemorySessionStore(private var session: Session? = null, override var lastHub: String? = null) : SessionStore {

    override fun load(): Session? = session

    override fun save(session: Session) {

        this.session = session

    }

    override fun clear() {

        session = null

    }

}