import annotation.tailrec
import reflect.BeanInfo
import util.matching.Regex
import util.parsing.combinator.{Parsers, RegexParsers}
object RefactoredAkaraLogParser {
  // イベントデータ
  trait Event {
    val event: String
  }

  case class Ignore(line: String) extends Event {
    val event = "__ignore__"
  }

  @BeanInfo case class Message(value: String) extends Event {
    def this() = this(null)
    val event = "message"
  }

  @BeanInfo case class NewTurn(player: String) extends Event {
    val event = "newTurn"
  }

  @BeanInfo case class TimeLimit(max: Double, fine: Double, easy: Double) extends Event {
    val event = "timeLimit"
  }

  @BeanInfo case class BestMove(move: Move, feeling: String, ballots: List[Ballot]) extends Event {
    val event = "bestMove"
  }

  @BeanInfo case class Ballot(
    votes: Double, move: Move, nps: Int, elapsed: Int, name: String, score: String)

  @BeanInfo case class Pondering(ballots: List[Ballot]) extends Event {
    val event = "pondering"
  }

  @BeanInfo
  case class Position(x: Int, y: Int)

  trait Move {
    val from: Position
    val to: Position
    val koma: String
  }

  @BeanInfo
  case class MoveWithoutTurn(from: Position, to: Position, koma: String) extends Move

  @BeanInfo
  case class MoveWithTurn(turn: String, from: Position, to: Position, koma: String) extends Move

  trait EndOfTurn {
    val move: Move
    val time: Int
  }

  @BeanInfo
  case class EndOfMyTurn(move: Move, time: Int) extends EndOfTurn with Event {
    val event = "endOfTurn(own)"
  }

  @BeanInfo
  case class EndOfOpponentsTurn(move: Move, time: Int, lookahead: String) extends EndOfTurn with Event {
    val event = "endOfTurn(opponent)"
  }

  trait RegexPatternParsers extends RegexParsers {
    //It is needed to disable RegexParser's implicit conversion Regex --> Parser[String]
    override def regex(r: Regex): Parser[String] = super.regex(r)

    implicit def pattern(r: Regex): Parser[List[String]] = new Parser[List[String]] {
      def apply(in: Input) = {
        val source = in.source
        val offset = in.offset
        r.findPrefixMatchOf(source.subSequence(offset, source.length)) match {
          case Some(matched) =>
            Success(matched.subgroups, in.drop(matched.end))
          case None =>
            Failure("string matching regex `" + r + "expected but `" + in.first + "' found", in.drop(offset))
        }
      }
    }
  }

  object ParserCore extends RegexPatternParsers {
    // 構文解析
    private val moveInfo: Parser[Move] = """([+-])?(\d)(\d)(\d)(\d)([A-Z]{2})""".r ^? ({
      case List(null, oldPosX, oldPosY, newPosX, newPosY, koma) =>
        MoveWithoutTurn(
          Position(oldPosX.toInt, oldPosY.toInt),
          Position(newPosX.toInt, newPosY.toInt),
          koma)
      case List(turn, oldPosX, oldPosY, newPosX, newPosY, koma) if turn == "+" || turn == "-" =>
        MoveWithTurn(
          turn match {
            case "+" => "1st"
            case "-" => "2nd"
          },
          Position(oldPosX.toInt, oldPosY.toInt),
          Position(newPosX.toInt, newPosY.toInt),
          koma)
    }, move => "Illegal move: " + move)
    private val inCmd = """^([^>]+)> (.*)$""".r
    private val newTurn: Parser[Event] = (
      inCmd ^? {
        case List("csa", "START:akara+ipsj50-99999-9999+shimizu+Akara2010+20101011130107") => NewTurn("shimizu")
      }
    | """^(.+) turn starts\.$""".r ^? ({
        case List("My") => NewTurn("Akara2010")
        case List("Opponent's") => NewTurn("shimizu")
      }, player => "The player name is illegal: " + player)
    )
    //残りの実装
  }
}