import sangria.macros.derive._
import sangria.schema._

// ... other entities

implicit val MaterialType = ObjectType(
    "Material",
    "",

	fields[Unit, Material](
	  Field("id", IntType,
      	description = Some("Id of Material"),
      	resolve = _.value.id)
	, Field("courseId", IntType,
      	description = Some("Parent Id of course"),
      	resolve = _.value.courseId)
	, Field("quantity", FloatType,
        description = Some("Cantidad"),
        resolve = _.value.quantity)
	, Field("item", ItemType,
        description = Some("Ítem (libro o material escolar)"),
        resolve = c ⇒ itemFetcher.defer(c.value.item)
	  )
    )
  )

implicit val CourseType = ObjectType(
    "Course",
    "",

	fields[Unit, Course](
	  Field("id", IntType,
      	description = Some("Id of Course"),
      	resolve = _.value.id)
	, Field("teachingCenterId", IntType,
      	description = Some("Parent Id of teachingCenter"),
      	resolve = _.value.teachingCenterId)
	, Field("name", StringType,
        description = Some("Nombre del curso"),
        resolve = _.value.name)
	, Field("cycle", StringType,
        description = Some("Ciclo formativo"),
        resolve = _.value.cycle)
	, Field("materials", OptionType(ListType(MaterialType)),
        description = Some("Libros y material escolar"),
        arguments = Limit :: Offset :: Search :: Nil,

        resolve = c => MaterialDeferred(c.value.materials, c arg Limit, c arg Offset, c arg Search)
	  )
    )
  )

implicit val TeachingCenterType = ObjectType(
  "TeachingCenter",
  "",

fields[Unit, TeachingCenter](
  Field("id", IntType,
    	description = Some("Id of TeachingCenter"),
    	resolve = _.value.id)
, Field("name", StringType,
      description = Some("Nombre del centro"),
      resolve = _.value.name)
, Field("email", OptionType(StringType),
      description = Some("Dirección de correo electrónico"),
      resolve = _.value.email)
, Field("courses", OptionType(ListType(CourseType)),
      description = Some("Cursos"),
      arguments = Limit :: Offset :: Search :: Nil,
      resolve = c => CourseDeferred(c.value.courses, c arg Limit, c arg Offset, c arg Search)
  )
  )
)