/*
 * Copyright (c) 2018 Alexander Yaburov
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package me.impa.knockonports.data

import android.util.Base64
import me.impa.knockonports.ext.EnumCompanion
import java.lang.Exception

enum class ContentEncoding {
    RAW {
        override fun decode(data: String?): ByteArray = (data ?: "").toByteArray()
    },
    BASE64 {
        override fun decode(data: String?): ByteArray =
            try {
                Base64.decode(data, Base64.DEFAULT)
            } catch (_: Exception) {
                byteArrayOf()
            }
    },

    @Suppress("unused")
    HEX {
        override fun decode(data: String?): ByteArray =
            try {
                if (data == null) {
                    byteArrayOf()
                } else {
                    ByteArray(data.length / 2) {
                        data.substring(it * 2, it * 2 + 2).toInt(16).toByte()
                    }
                }
            } catch (_: Exception) {
                byteArrayOf()
            }
    };

    abstract fun decode(data: String?): ByteArray

    companion object : EnumCompanion<ContentEncoding>(values())
}