/*
 * Copyright 2021 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 androidx.build.dependencyTracker

import java.io.File
import java.io.Serializable
import org.gradle.api.logging.LogLevel
import org.gradle.internal.logging.slf4j.OutputEventListenerBackedLogger
import org.gradle.internal.logging.slf4j.OutputEventListenerBackedLoggerContext
import org.gradle.internal.time.Clock

/** Gradle logger that logs to a file */
class FileLogger(val file: File) : Serializable {
    @Transient var impl: OutputEventListenerBackedLogger? = null

    fun toLogger(): OutputEventListenerBackedLogger {
        if (impl == null) {
            impl =
                OutputEventListenerBackedLogger(
                    "my_logger",
                    OutputEventListenerBackedLoggerContext(Clock { System.currentTimeMillis() })
                        .also {
                            it.level = LogLevel.DEBUG
                            it.setOutputEventListener { file.appendText(it.toString() + "\n") }
                        },
                    Clock { System.currentTimeMillis() }
                )
        }
        return impl!!
    }

    fun lifecycle(text: String) {
        toLogger().lifecycle(text)
    }

    fun info(text: String) {
        toLogger().info(text)
    }
}