import io.gitlab.jfronny.scripts.*
import org.eclipse.jgit.api.Git
import java.awt.Toolkit
import java.awt.datatransfer.StringSelection

val isRelease = project.hasProperty("release")

versionS = "0.0.0+nogit"
versionType = VersionType.ALPHA
if (File(projectDir, ".git").exists()) {
    Git.open(projectDir).use { git ->
        versionS = "0.0.0+notag"
        val tags: List<Tag> = git.getTags()
        if (tags.isNotEmpty()) {
            if (tags[0].fullMessage != null) changelog += "${tags[0].fullMessage}\n"
            versionS = tags[0].name
            val vt = when(versionS[0]) {
                'v' -> VersionType.RELEASE
                'b' -> VersionType.BETA
                'a' -> VersionType.ALPHA
                else -> null
            }
            versionType = vt ?: VersionType.RELEASE
            if (vt != null) versionS = versionS.substring(1)
            if (isRelease) {
                changelog += "Commits in ${versionType.displayName} $versionS:\n"
                changelog += git.log(if (tags.size >= 2) tags[1].id else null, tags[0].id)
                    .reversed()
                    .joinToString("\n") { "- ${it.shortMessage}" }
            } else {
                changelog += "Commits after ${versionType.displayName} $versionS:\n"
                changelog += git.log(tags[0].id, git.repository.resolve("HEAD"))
                    .reversed()
                    .joinToString("\n") { "- ${it.shortMessage}" }
            }
        } else {
            changelog += "Commits after inception:\n"
            changelog += git.log().all().call()
                .reversed()
                .joinToString("\n") { "- ${it.shortMessage}" }
        }
    }
} else changelog = "No changelog"

if (!isRelease) {
    versionS += "-SNAPSHOT"
}

println(changelog)

tasks.register("copyVersionNumber") {
    doLast {
        Toolkit.getDefaultToolkit().systemClipboard.setContents(StringSelection(versionS), null)
        println("Copied version number: $versionS")
    }
}