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/*
  Rapture, version 2.0.0. Copyright 2010-2016 Jon Pretty, Propensive Ltd.

  The primary distribution site is
  
    http://rapture.io/

  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
  compliance with the License. You may obtain a copy of the License at
  
    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software distributed under the License is
  distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and limitations under the License.
 */

package rapture.core

object TimeSystem {
  type ByInstant[T] = TimeSystem[T, _]
  type ByDuration[T] = TimeSystem[_, T]
}

@implicitNotFound(
    "an implicit TimeSystem is required; please import timeSystems.numeric._ or " +
      "timeSystems.javaUtil._")
trait TimeSystem[Instant, Duration] {
  def instant(millis: Long): Instant
  def duration(from: Long, to: Long): Duration
  def fromInstant(inst: Instant): Long
  def fromDuration(dur: Duration): Long
}

package timeSystems {
  object numeric {
    def apply(): TimeSystem[Long, Long] = timeSystemImplicit
    implicit val timeSystemImplicit: TimeSystem[Long, Long] = new TimeSystem[Long, Long] {
      def instant(millis: Long): Long = millis
      def duration(from: Long, to: Long): Long = to - from
      def fromInstant(inst: Long): Long = inst
      def fromDuration(dur: Long): Long = dur
    }
  }

  object javaUtil {
    def apply(): TimeSystem[java.util.Date, Long] = timeSystemImplicit
    implicit val timeSystemImplicit = new TimeSystem[java.util.Date, Long] {
      import java.util.Date
      def instant(millis: Long) = new Date(millis)
      def duration(from: Long, to: Long): Long = to - from
      def fromInstant(inst: Date): Long = inst.getTime
      def fromDuration(dur: Long): Long = dur
    }
  }
}