package lol.frijole.ampfire.subsonic

import java.math.BigInteger
import java.security.MessageDigest
import java.security.SecureRandom

class SubsonicAuth private constructor(
    private val username: String,
    private val token: String,
    private val salt: String,
) {
    fun params(): Map<String, String> = mapOf(
        "u" to username,
        "t" to token,
        "s" to salt,
        "v" to "1.16.1",
        "c" to "AmpFire",
        "f" to "json",
    )

    fun queryString(): String = params().map { (k, v) -> "$k=${java.net.URLEncoder.encode(v, "UTF-8")}" }.joinToString("&")

    companion object {
        fun forPassword(username: String, password: String): SubsonicAuth {
            val salt = BigInteger(64, SecureRandom()).toString(16)
            val digest = MessageDigest.getInstance("MD5").digest((password + salt).toByteArray())
                .joinToString("") { "%02x".format(it) }
            return SubsonicAuth(username, digest, salt)
        }
    }
}