/*
 * Copyright (C) 2025 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.android.privatespace.logging

import com.android.privatespace.PrivateSpaceStatsLog

/**
 * A utility object for logging the results of file transfer operations to the Private Space. It
 * handles logging for success, partial success, and failure scenarios to PrivateSpaceStatsLog.
 */
object FileTransferResultLogger {

    /**
     * Logs a file transfer result event.
     *
     * The final transfer result is determined based on the contents of [filesLoggingDetails]:
     * - **Success**: If there is at least one successful file transfer and no failures.
     * - **Failure**: If there are no successful file transfers.
     * - **Partial Success**: If there are both successful and failed file transfers.
     *
     * @param keepOriginal Specifies the type of operation: `false` for a move operation, or `true`
     *   for a copy operation.
     * @param filesSelectedCount The total number of files the user initially selected to transfer.
     * @param filesLoggingDetails An object containing aggregated details about the successful and
     *   failed files, including counts, total sizes, and MIME types.
     */
    fun logMoveContentResultEvent(
        keepOriginal: Boolean,
        filesSelectedCount: Int,
        filesLoggingDetails: FilesLoggingDetails,
    ) {
        val operationType =
            if (keepOriginal)
                PrivateSpaceStatsLog
                    .PRIVATE_SPACE_MOVE_CONTENT_EVENT__OPERATION_TYPE__OPERATION_COPY
            else
                PrivateSpaceStatsLog
                    .PRIVATE_SPACE_MOVE_CONTENT_EVENT__OPERATION_TYPE__OPERATION_MOVE
        val transferResult =
            when {
                filesLoggingDetails.successFileMimeTypes.isNotEmpty() &&
                    filesLoggingDetails.failedFileDetails.isEmpty() -> {
                    PrivateSpaceStatsLog
                        .PRIVATE_SPACE_MOVE_CONTENT_EVENT__TRANSFER_RESULT__TRANSFER_RESULT_SUCCESS
                }
                filesLoggingDetails.successFileMimeTypes.isEmpty() -> {
                    PrivateSpaceStatsLog
                        .PRIVATE_SPACE_MOVE_CONTENT_EVENT__TRANSFER_RESULT__TRANSFER_RESULT_FAILURE
                }
                else -> {
                    PrivateSpaceStatsLog
                        .PRIVATE_SPACE_MOVE_CONTENT_EVENT__TRANSFER_RESULT__TRANSFER_RESULT_PARTIAL_SUCCESS
                }
            }

        PrivateSpaceStatsLog.write(
            PrivateSpaceStatsLog.PRIVATE_SPACE_MOVE_CONTENT_EVENT,
            operationType,
            filesSelectedCount,
            /* transfer_result */ transferResult,
            /* files_success_count */ filesLoggingDetails.successFileMimeTypes.size,
            /* files_failure_count */ filesLoggingDetails.failedFileDetails.size,
            /* total_success_files_size_bucket */ if (
                filesLoggingDetails.successFileMimeTypes.isEmpty()
            )
                0
            else
                FileSizeBucketConverter.getFileSizeBucket(
                    filesLoggingDetails.totalSuccessFilesSize
                ),
            /* total_failure_files_size_bucket */ if (
                filesLoggingDetails.failedFileDetails.isEmpty()
            )
                0
            else
                FileSizeBucketConverter.getFileSizeBucket(filesLoggingDetails.totalFailedFilesSize),
            /* failed_file_error_codes */ filesLoggingDetails.failedFileDetails
                .map { it.errorCode }
                .toIntArray(),
            /* failed_file_mime_types */
            filesLoggingDetails.failedFileDetails
                .map { MimeTypeConverter.getMimeTypeCategory(it.mimeType) }
                .toIntArray(),
            /* success_file_mime_types */
            filesLoggingDetails.successFileMimeTypes
                .map { MimeTypeConverter.getMimeTypeCategory(it) }
                .toIntArray(),
            /* notification_event */ 0,
            // TODO(b/400696164): Implement duration calculation.
            /* duration_ms */ 0,
        )
    }

    fun logTransferFailedOnPrechecks(
        errorCode: Int,
        numberOfFiles: Int,
        totalSizeFilesSelected: Long,
    ) {
        PrivateSpaceStatsLog.write(
            PrivateSpaceStatsLog.PRIVATE_SPACE_MOVE_CONTENT_EVENT,
            /* operation_type */ 0,
            /* files_selected_count */ numberOfFiles,
            /* transfer_result */ PrivateSpaceStatsLog
                .PRIVATE_SPACE_MOVE_CONTENT_EVENT__TRANSFER_RESULT__TRANSFER_RESULT_FAILURE,
            /* files_success_count */ 0,
            /* files_failure_count */ numberOfFiles,
            /* total_success_files_size_bucket */ 0,
            /* total_failure_files_size_bucket */ FileSizeBucketConverter.getFileSizeBucket(
                totalSizeFilesSelected
            ),
            /* failed_file_error_codes */ IntArray(numberOfFiles) { errorCode },
            /* failed_file_mime_types */ null,
            /* success_file_mime_types */ null,
            /* notification_event */ 0,
            /* duration_ms */ 0,
        )
    }

    fun logAnotherTransferInProgressEvent() {
        val errorCode =
            PrivateSpaceStatsLog
                .PRIVATE_SPACE_MOVE_CONTENT_EVENT__FAILED_FILE_ERROR_CODES__TRANSFER_ERROR_ANOTHER_TRANSFER_IN_PROGRESS
        PrivateSpaceStatsLog.write(
            PrivateSpaceStatsLog.PRIVATE_SPACE_MOVE_CONTENT_EVENT,
            /* operation_type */ 0,
            /* files_selected_count */ 0,
            /* transfer_result */ PrivateSpaceStatsLog
                .PRIVATE_SPACE_MOVE_CONTENT_EVENT__TRANSFER_RESULT__TRANSFER_RESULT_FAILURE,
            /* files_success_count */ 0,
            /* files_failure_count */ 0,
            /* total_success_files_size_bucket */ 0,
            /* total_failure_files_size_bucket */ 0,
            /* failed_file_error_codes */ intArrayOf(errorCode),
            /* failed_file_mime_types */ null,
            /* success_file_mime_types */ null,
            /* notification_event */ 0,
            /* duration_ms */ 0,
        )
    }
}