def cistemGoldStandardBaseUrl = 'https://raw.githubusercontent.com/LeonieWeissweiler/CISTEM/refs/heads/master/gold_standards'
def cistemGoldStandardFiles = [
        'goldstandard1.txt',
        'goldstandard2.txt'
]
def cistemGoldStandardDownloadDirectory = layout.buildDirectory.dir('third-party/cistem-gold-standards')
def cistemGoldStandardGeneratedResourcesDirectory = layout.buildDirectory.dir('generated/resources/cistem-gold-standards')

def cistemGoldStandardDownloadedFiles = cistemGoldStandardFiles.collect { String fileName ->
    cistemGoldStandardDownloadDirectory.map { it.file(fileName) }
}

tasks.register('downloadCistemGoldStandards') {
    group = 'build setup'
    description = 'Downloads benchmark-only CISTEM German gold standards.'

    outputs.files(cistemGoldStandardDownloadedFiles)

    doLast {
        cistemGoldStandardFiles.each { String fileName ->
            final File targetFile = cistemGoldStandardDownloadDirectory.get().file(fileName).asFile
            targetFile.parentFile.mkdirs()

            if (!targetFile.exists()) {
                final URL sourceUrl = new URL("${cistemGoldStandardBaseUrl}/${fileName}")
                try {
                    sourceUrl.withInputStream { inputStream ->
                        targetFile.withOutputStream { outputStream ->
                            outputStream << inputStream
                        }
                    }
                } catch (FileNotFoundException exception) {
                    throw new GradleException(
                            "Unable to download CISTEM gold standard ${fileName} from ${sourceUrl}.",
                            exception)
                }
            }

            if (targetFile.length() <= 0L) {
                throw new GradleException("Downloaded CISTEM gold standard ${fileName} was empty.")
            }
        }
    }
}

tasks.register('prepareCistemGoldStandardResources', Copy) {
    group = 'build setup'
    description = 'Copies benchmark-only CISTEM German gold standards into the JMH resource output.'

    dependsOn(tasks.named('downloadCistemGoldStandards'))

    from(cistemGoldStandardDownloadDirectory) {
        include 'goldstandard1.txt'
        include 'goldstandard2.txt'
    }
    into(cistemGoldStandardGeneratedResourcesDirectory)
}

sourceSets {
    jmh {
        resources {
            srcDir(cistemGoldStandardGeneratedResourcesDirectory)
        }
    }
}

tasks.named('processJmhResources') {
    dependsOn(tasks.named('prepareCistemGoldStandardResources'))
}