package mill.util

import java.io.{ByteArrayInputStream, ByteArrayOutputStream, PrintStream}

import ammonite.ops._
import utest._

abstract class ScriptTestSuite(fork: Boolean) extends TestSuite{
  def workspaceSlug: String
  def scriptSourcePath: Path
  def buildPath: RelPath = "build.sc"

  val workspacePath = pwd / 'target / 'workspace / workspaceSlug
  val wd = workspacePath / buildPath / up
  val stdOutErr = new PrintStream(new ByteArrayOutputStream())
  val stdIn = new ByteArrayInputStream(Array())
  val disableTicker = false
  val debugLog = false
  lazy val runner = new mill.main.MainRunner(
    ammonite.main.Cli.Config(wd = wd), disableTicker,
    stdOutErr, stdOutErr, stdIn, None, Map.empty,
    b => (), debugLog
  )
  def eval(s: String*) = {
    if (!fork) runner.runScript(workspacePath / buildPath , s.toList)
    else{
      try {
        %(home / "mill-release", "-i", s)(wd)
        true
      }catch{case e: Throwable => false}
    }
  }
  def meta(s: String) = {
    val (List(selector), args) = ParseArgs.apply(Seq(s), multiSelect = false).right.get

    read(wd / "out" / selector._2.value.flatMap(_.pathSegments) / "meta.json")
  }


  def initWorkspace() = {
    rm(workspacePath)
    mkdir(workspacePath / up)
    // The unzipped git repo snapshots we get from github come with a
    // wrapper-folder inside the zip file, so copy the wrapper folder to the
    // destination instead of the folder containing the wrapper.

    cp(scriptSourcePath, workspacePath)
  }
}