/*
 * Copyright (C) 2020 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.
 */

import java.io.File
import java.nio.file.Files

fun main(args: Array<String>) {
    val showUsage = args.isEmpty() || when (args.singleOrNull()) {
        "-h", "--help" -> true
        else -> false
    }
    if (showUsage) {
        usage()
        return
    }

    val files = args.flatMap {
        File(it).walk().filter { it.isFile && it.extension == "java" }.map { it.toPath() }
    }
    val persistences = parse(files)
    for (persistence in persistences) {
        val file = generate(persistence)
        Files.newBufferedWriter(persistence.path).use {
            it.write(FILE_HEADER)
            file.writeTo(it)
        }
    }
}

private fun usage() {
    println("Usage: xmlpersistence <FILES>")
}