/*

 * REPL:

 *

 * ./mill --repl -w

 *

 * Generate Idea project:

 *

 * ./mill mill.scalalib.GenIdea/idea

 *

 */ 

import ammonite.ops._

import mill._

import mill.api.Loose

import mill.define.{Command, Input, Sources, Target}

import mill.scalajslib._

import mill.scalalib._

import mill.scalalib.publish._

import scala.language.postfixOps

object V {

  val fatags = "0.7-SNAPSHOT"

  val scala211 = "2.11.12"

  val scala212 = "2.12.12"

  val scala213 = "2.13.4"

  val scalaJs06 = "0.6.33"

  val scalaJs = "1.3.1"

  val scalatags = "0.9.2"

}

object D {

  val scalatags211 = ivy"com.lihaoyi::scalatags::0.6.8"

  val scalatags = ivy"com.lihaoyi::scalatags::${V.scalatags}"

}

def camelCase(s: String): String = {

  def inner(l: List[Char]): List[Char] = l match {

    case '-' :: '-' :: c :: rest => c.toUpper :: inner(rest)

    case '-' :: c :: rest => c.toUpper :: inner(rest)

    case c :: rest => c :: inner(rest)

    case Nil => Nil

  }

  inner(s toList) mkString ""

}

val compilerOptions = Seq(

  "-deprecation",                      // Emit warning and location for usages of deprecated APIs.

  "-encoding", "utf-8",                // Specify character encoding used by source files.

  "-explaintypes",                     // Explain type errors in more detail.

  "-feature",                          // Emit warning and location for usages of features that should be imported explicitly.

  "-language:higherKinds",             // Allow higher-kinded types

  "-language:implicitConversions",     // Allow definition of implicit functions called views

  "-language:reflectiveCalls",

  "-language:postfixOps",

  "-unchecked",                        // Enable additional warnings where generated code depends on assumptions.

  "-Xcheckinit",                       // Wrap field accessors to throw an exception on uninitialized access.

  "-target:jvm-1.8"

)

trait Common extends CrossSbtModule with PublishModule {

  override def artifactName = "fatags"

  def publishVersion: Target[String] = V.fatags

  def pomSettings: T[PomSettings] = PomSettings(

    description = "FontAwesome Scala DSL (tags)",

    organization = "cz.functionals",

    url = "https://hg.functionals.cz/fatags",

    licenses = Seq(License.`Apache-2.0`),

    versionControl = VersionControl(developerConnection = Some(

      "ssh://tzeman@hg.functionals.cz/repos/public/fatags")),

    developers = Seq(

      Developer("tzeman", "Tomas Zeman", "")

    )

  )

  override def scalacOptions: T[Seq[String]] = T{compilerOptions}

  def hgId: Input[String] = T.input {

    os.proc("hg", "id", "-i").call().out.text.trim

  }

  def hgNum: Input[String] = T.input {

    os.proc("hg", "id", "-n").call().out.text.trim

  }

  def hgTag: Input[Option[String]] = T.input {

    os.proc("hg", "id", "-t").call().out.text.trim.split(' ').headOption

  }

  override def ivyDeps: Target[Loose.Agg[Dep]] = T{

    if (scalaVersion() == V.scala211) Agg(D.scalatags211) else Agg(D.scalatags)

  }

  override def sources: Sources = T.sources{

    super.sources() :+ PathRef(millSourcePath / 'shared / 'src / 'main / 'scala)

  }

  // https://github.com/FortAwesome/Font-Awesome/raw/5.15.1/metadata/icons.json

  type IcoDef = (String, Set[String])

  def parseIcons: Target[List[IcoDef]] = T{

    ujson.read(os.read! pwd / "icons.json").obj.map(e => (e._1, e._2.obj("styles").arr.map(_.str).toSet)).toList

  }

  private def tpl(d: IcoDef): Set[String] = {

    val sym = d._1

    d._2.map {

      case "brands" =>  s"""  def ${camelCase(s"fab-$sym")}: FA = fab("$sym")"""

      case "solid" =>   s"""  def ${camelCase(s"fas-$sym")}: FA = fas("$sym")"""

      case "regular" => s"""  def ${camelCase(s"far-$sym")}: FA = far("$sym")"""

    }

  }

  override def generatedSources: Sources = T.sources{

    val d = T.ctx().dest

    val icons = parseIcons()

    write(d / "generated.scala",

      s"""

        |package fontawesome.generic

        |import scalatags.generic._

        |class GenericFA[Builder, Output <: FragT, FragT](

        |  val bun: Bundle[Builder, Output, FragT]) {

        |

        |  import bun.all._

        |

        |  val faStack: Modifier = cls := "fa-stack fa-lg"

        |

        |  implicit val bundle: Bundle[Builder, Output, FragT] = bun

        |  implicit def fa2mod(x: FA): Modifier = x()

        |

        |  private def fab(w: String): FA = FA(FaStyle.Brands, w)

        |  private def far(w: String): FA = FA(FaStyle.Regular, w)

        |  private def fas(w: String): FA = FA(FaStyle.Solid, w)

        |

        |${icons flatMap tpl mkString "\n"}

        |

        |}

      """.stripMargin)

    d

  }

}

class JvmModule(val crossScalaVersion: String) extends Common

class JsModule(val crossScalaVersion: String, crossJSVersion: String)

  extends ScalaJSModule with Common {

  override def scalaJSVersion: Target[String] = crossJSVersion

  override def millSourcePath = super.millSourcePath / os.up

}

object jvm extends Cross[JvmModule](V.scala211, V.scala212, V.scala213)

object js extends Cross[JsModule](

  V.scala211 -> V.scalaJs06,

  V.scala212 -> V.scalaJs06,

  V.scala212 -> V.scalaJs,

  V.scala213 -> V.scalaJs06,

  V.scala213 -> V.scalaJs

)

def compileAll(): Command[Unit] = T.command{

  jvm(V.scala213).compile()

  js(V.scala213, V.scalaJs).compile()

  js(V.scala213, V.scalaJs06).compile()

  jvm(V.scala212).compile()

  js(V.scala212, V.scalaJs).compile()

  js(V.scala212, V.scalaJs06).compile()

  jvm(V.scala211).compile()

  js(V.scala211, V.scalaJs06).compile()

  ()

}

def publishLocal(): Command[Unit] = T.command{

  jvm(V.scala213).publishLocal()()

  js(V.scala213, V.scalaJs).publishLocal()()

  js(V.scala213, V.scalaJs06).publishLocal()()

  jvm(V.scala212).publishLocal()()

  js(V.scala212, V.scalaJs).publishLocal()()

  js(V.scala212, V.scalaJs06).publishLocal()()

  jvm(V.scala211).publishLocal()()

  js(V.scala211, V.scalaJs06).publishLocal()()

}

def publishM2Local(p: os.Path): Command[Unit] = T.command{

  jvm(V.scala213).publishM2Local(p.toString)()

  js(V.scala213, V.scalaJs).publishM2Local(p.toString)()

  js(V.scala213, V.scalaJs06).publishM2Local(p.toString)()

  jvm(V.scala212).publishM2Local(p.toString)()

  js(V.scala212, V.scalaJs).publishM2Local(p.toString)()

  js(V.scala212, V.scalaJs06).publishM2Local(p.toString)()

  jvm(V.scala211).publishM2Local(p.toString)()

  js(V.scala211, V.scalaJs06).publishM2Local(p.toString)()

  ()

}

object example extends ScalaModule with ScalaJSModule {

  override def scalaVersion: Target[String] = T{V.scala213}

  override def scalaJSVersion: Target[String] = V.scalaJs

  override def scalacOptions: T[Seq[String]] = T{compilerOptions}

  override def moduleDeps: Seq[PublishModule] = Seq(js(V.scala213, V.scalaJs))

}

// vim: et ts=2 sw=2 syn=scala