package magnolia.tests

import magnolia._
import estrapade._
import contextual.data.scalac._
import contextual.data.fqt._
import contextual.data.txt._

import scala.util._

sealed trait Tree[+T]
case class Leaf[+L](value: L) extends Tree[L]
case class Branch[+B](left: Tree[B], right: Tree[B]) extends Tree[B]

sealed trait Entity

case class Company(name: String) extends Entity
case class Person(name: String, age: Int) extends Entity
case class Address(line1: String, occupant: Person)

sealed trait Color
case object Red extends Color
case object Green extends Color
case object Blue extends Color

object Tests extends TestApp {

  def tests() = for(i <- 1 to 10000) {
    import examples._

    test("construct a Show product instance") {
      import examples._
      Show.generic[Person].show(Person("John Smith", 34))
    }.assert(_ == """Person(name=John Smith,age=34)""")

    test("construct a Show coproduct instance") {
      import examples._
      Show.generic[Person].show(Person("John Smith", 34))
    }.assert(_ == "Person(name=John Smith,age=34)")
    
    test("serialize a Branch") {
      import magnolia.examples._
      implicitly[Show[String, Branch[String]]].show(Branch(Leaf("LHS"), Leaf("RHS")))
    }.assert(_ == "Branch[String](left=Leaf[String](value=LHS),right=Leaf[String](value=RHS))")

    test("test equality false") {
      import examples._
      Eq.generic[Entity].equal(Person("John Smith", 34), Person("", 0))
    }.assert(_ == false)

    test("test equality true") {
      import examples._
      Eq.generic[Entity].equal(Person("John Smith", 34), Person("John Smith", 34))
    }.assert(_ == true)

    test("test branch equality true") {
      import examples._
      Eq.generic[Tree[String]].equal(Branch(Leaf("one"), Leaf("two")), Branch(Leaf("one"), Leaf("two")))
    }.assert(_ == true)

    test("construct a default value") {
      Default.generic[Entity].default
    }.assert(_ == Company(""))

    test("construction of Show instance for Leaf") {
      scalac"""
        import magnolia.examples._
        implicitly[Show[String, Leaf[java.lang.String]]]
      """
    }.assert(_ == Returns(fqt"magnolia.examples.Show[String,magnolia.tests.Leaf[String]]"))
    
    test("construction of Show instance for Tree") {
      scalac"""
        import magnolia.examples._
        implicitly[Show[String, Tree[String]]]
      """
    }.assert(_ == Returns(fqt"magnolia.examples.Show[String,magnolia.tests.Tree[String]]"))
    
    test("serialize a Leaf") {
      implicitly[Show[String, Leaf[String]]].show(Leaf("testing"))
    }.assert(_ == "Leaf[String](value=testing)")
    
    test("serialize a Branch as a Tree") {
      implicitly[Show[String, Tree[String]]].show(Branch(Leaf("LHS"), Leaf("RHS")))
    }.assert(_ == "Branch[String](left=Leaf[String](value=LHS),right=Leaf[String](value=RHS))")
    
    test("serialize case object") {
      implicitly[Show[String, Red.type]].show(Red)
    }.assert(_ == "Red()")

    test("serialize case object as a sealed trait") {
      implicitly[Show[String, Color]].show(Blue)
    }.assert(_ == "Blue()")

    test("decode a company") {
      implicitly[Decoder[Company]].decode("""Company(name=Acme Inc)""")
    }.assert(_ == Company("Acme Inc"))

    test("decode a Person as an Entity") {
      implicitly[Decoder[Entity]].decode("""Person(name=John Smith,age=32)""")
    }.assert(_ == Person("John Smith", 32))

    test("decode a nested product") {
      implicitly[Decoder[Address]].decode("""Address(line1=53 High Street,occupant=Person(name=Richard Jones,age=44))""")
    }.assert(_ == Address("53 High Street", Person("Richard Jones", 44)))

    test("show error stack") {
      scalac"""
        import magnolia.examples._
        case class Alpha(integer: Double)
        case class Beta(alpha: Alpha)
        Show.generic[Beta]
      """
    }.assert(_ == TypecheckError(txt"""magnolia: could not find typeclass for type Double
                                      |    in parameter 'integer' of product type Alpha
                                      |    in parameter 'alpha' of product type Beta
                                      |"""))
    
  }
}