/*
 * Copyright (C) 2018-2019 Lightbend Inc. <https://www.lightbend.com>
 */

package sbt
import Keys.baseDirectory

import akka.ProjectFileIgnoreSupport
import sbt.Keys.unmanagedSources

trait ScalafixSupport {
  private val ignoreConfigFileName: String = ".scalafix.conf"
  private val descriptor: String = "scalafix"

  protected def ignore(configKey: ConfigKey): Def.Setting[Task[Seq[File]]] = {
    import scalafix.sbt.ScalafixPlugin.autoImport._

    unmanagedSources.in(configKey, scalafix) := {
      val ignoreSupport = new ProjectFileIgnoreSupport((baseDirectory in ThisBuild).value / ignoreConfigFileName, descriptor)

      unmanagedSources.in(configKey, scalafix).value
        .filterNot(file => ignoreSupport.isIgnoredByFileOrPackages(file))
    }
  }


  import sbt.Keys._

  def addProjectCommandsIfAbsent(alias: String, value: String): Def.Setting[Seq[Command]] = {
    commands := {
      val currentCommands = commands.value.collect {
        case command: SimpleCommand => command.name
      }.toSet
      val isPresent = currentCommands(alias)
      if (isPresent)
        commands.value
      else
        commands.value :+ BasicCommands.newAlias(
          name = alias,
          value = value
        )
    }
  }

  def updateProjectCommands(alias: String, value: String): Def.Setting[Seq[Command]] = {
    commands := {
      commands.value.filterNot({
        case command: SimpleCommand => command.name == alias
        case _ => false
      }) :+ BasicCommands.newAlias(
        name = alias,
        value = value
      )
    }
  }
}