import java.nio.file.Path
import java.time.LocalDateTime
import java.time.format.DateTimeFormatter

ext.getCurrentVersion = {
    String tagIsh = "dev-unknown"
    try {
        tagIsh = providers.exec {
            commandLine 'git', 'describe', '--tags', '--match=v*'
        }.standardOutput.asText.get().trim().toLowerCase()
    } catch (Exception ignored) {
        tagIsh = "dev-unknown"
    }

    // Dev tags: v2021.1.6-3-gf922466d
    // We're specifically looking to capture the middle -3-
    boolean isDev = tagIsh.matches(".*-[0-9]*-g[0-9a-f]*")
    if (isDev && !tagIsh.startsWith("dev-")) tagIsh = "dev-" + tagIsh
    println("Picked up version: " + tagIsh)
    return tagIsh
}

if (!ext.has("versionString")) {
    ext.versionString = getCurrentVersion()
}

ext.writePhotonVersionFile = {File versionFileIn, Path path, String version ->
    println("Writing " + version + " to " + path.toAbsolutePath().toString())
    String date = DateTimeFormatter.ofPattern("yyyy-M-d hh:mm:ss").format(LocalDateTime.now())
    File versionFileOut = new File(path.toAbsolutePath().toString())
    versionFileOut.delete()

    def read = versionFileIn.text
            .replace('${version}', version)
            .replace('${date}', date)
            .replace('${wpilibVersion}', wpilibVersion)
            // Note that OpenCV is usually {VERSION}-{some suffix}, we just want the first bit
            .replace('${opencvVersion}', openCVversion.split("-").first())
    if (!versionFileOut.parentFile.exists()) versionFileOut.parentFile.mkdirs()
    if (!versionFileOut.exists()) versionFileOut.createNewFile()
    versionFileOut.write(read)
}