/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed 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 com.example.android.systemupdatersample.util;

import android.os.UpdateEngine;
import android.util.SparseArray;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

/**
 * Helper class to work with update_engine's error codes.
 * Many error codes are defined in  {@link UpdateEngine.ErrorCodeConstants},
 * but you can find more in system/update_engine/common/error_code.h.
 */
public final class UpdateEngineErrorCodes {

    /**
    * Error code from the update engine. Values must agree with the ones in
    * system/update_engine/common/error_code.h.
    */
    public static final int UNKNOWN = -1;
    public static final int UPDATED_BUT_NOT_ACTIVE = 52;
    public static final int USER_CANCELLED = 48;

    private static final SparseArray<String> CODE_TO_NAME_MAP = new SparseArray<>();

    static {
        CODE_TO_NAME_MAP.put(0, "SUCCESS");
        CODE_TO_NAME_MAP.put(1, "ERROR");
        CODE_TO_NAME_MAP.put(4, "FILESYSTEM_COPIER_ERROR");
        CODE_TO_NAME_MAP.put(5, "POST_INSTALL_RUNNER_ERROR");
        CODE_TO_NAME_MAP.put(6, "PAYLOAD_MISMATCHED_TYPE_ERROR");
        CODE_TO_NAME_MAP.put(7, "INSTALL_DEVICE_OPEN_ERROR");
        CODE_TO_NAME_MAP.put(8, "KERNEL_DEVICE_OPEN_ERROR");
        CODE_TO_NAME_MAP.put(9, "DOWNLOAD_TRANSFER_ERROR");
        CODE_TO_NAME_MAP.put(10, "PAYLOAD_HASH_MISMATCH_ERROR");
        CODE_TO_NAME_MAP.put(11, "PAYLOAD_SIZE_MISMATCH_ERROR");
        CODE_TO_NAME_MAP.put(12, "DOWNLOAD_PAYLOAD_VERIFICATION_ERROR");
        CODE_TO_NAME_MAP.put(15, "NEW_ROOTFS_VERIFICATION_ERROR");
        CODE_TO_NAME_MAP.put(20, "DOWNLOAD_STATE_INITIALIZATION_ERROR");
        CODE_TO_NAME_MAP.put(48, "USER_CANCELLED");
        CODE_TO_NAME_MAP.put(52, "UPDATED_BUT_NOT_ACTIVE");
    }

    /**
     * Completion codes returned by update engine indicating that the update
     * was successfully applied.
     */
    private static final Set<Integer> SUCCEEDED_COMPLETION_CODES = new HashSet<>(
            Arrays.asList(UpdateEngine.ErrorCodeConstants.SUCCESS,
                    // UPDATED_BUT_NOT_ACTIVE is returned when the payload is
                    // successfully applied but the
                    // device won't switch to the new slot after the next boot.
                    UPDATED_BUT_NOT_ACTIVE));

    /**
     * checks if update succeeded using errorCode
     */
    public static boolean isUpdateSucceeded(int errorCode) {
        return SUCCEEDED_COMPLETION_CODES.contains(errorCode);
    }

    /**
     * converts error code to error name
     */
    public static String getCodeName(int errorCode) {
        return CODE_TO_NAME_MAP.get(errorCode);
    }

    private UpdateEngineErrorCodes() {}
}