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aiinput.cpp

/*
   This file is part of the KDE games lskat program
   Copyright (c) 2006 Martin Heni <kde@heni-online.de>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include "aiinput.h"

// Qt includes
#include <QPixmap>
#include <QTimer>

// KDE includes
#include <kdebug.h>

// Local includes
#include "lskatglobal.h"
#include "player.h"


// Constructor for the engine
00036 AiInput::AiInput(EngineTwo* engine, QObject* parent)
    : AbstractInput(parent)
{
  // Store engine
  mEngine = engine;
}


// Allow or disallow input with this device 
00045 void AiInput::setInputAllowed(bool allowed)
{
  AbstractInput::setInputAllowed(allowed);
  if (allowed) QTimer::singleShot(1000, this, SLOT(aiTurn()));
}


// Calculate and send out AI turn
00053 void AiInput::aiTurn()
{
  // Turn was stopped meanwhile
  if (!mInputAllowed) return;

  if (global_debug > 5) kDebug() << "===================================================";
  if (global_debug > 5) kDebug() << "AI TURN START " <<mInputAllowed;

  // Check we are the right player
  if (mId != mEngine->currentPlayer())
  {
    kFatal() << "AI plays for wrong player";
    return;
  }

  // Retrieve game board
  AiInput::Board board = getBoardFromEngine();
  AiInput::Move move;

  if (global_debug > 0) kDebug() << "";

  // Initiate move
  if (mEngine->currentMovePhase() == EngineTwo::FirstPlayerTurn)
  {
    if (global_debug > 5) kDebug() << "Performing initiual move "<<mId;
    move = initiateMove(mId, board);
  }
  // Respond to move
  else
  {
    if (global_debug > 5) kDebug() << "Performing answer move "<<mId;
    move = answerMove(mId, board);
  }


  // Send out move
  if (global_debug > 5) kDebug() << "AI player" << mId << "moves to" << move.move;
  if (move.move>=0) emit signalPlayerInput(mId, mId, move.move);
  else kError() << "Illegal AI Move ??? ";
}


// Extract the current game board from the engine
00096 AiInput::Board AiInput::getBoardFromEngine()
{
  Board b;
  int cnt = 0;
  // Reset array
  for (int i=0; i<32; i++)
  {
    b.playedCards[i] = -1;
  } 

  for (int i=0; i<2; i++)
  {
    Player* p = mEngine->player(i);
    for (int c=0; c<16; c++)
    {
      int card      = p->getCard(c);
      b.cards[i][c] = card;
      b.points[i]   = p->points();
    }
    for (int c=0; c<p->noOfMovesWon()*2; c++)
    {
      int card = p->getWonCard(c);
      b.playedCards[cnt] = card;
      cnt++;
    }
  }
   
  b.whoseTurn  = mEngine->currentPlayer();
  b.firstPlay  = mEngine->currentMovePhase() == EngineTwo::FirstPlayerTurn;
  b.playedCard = mEngine->playedCard(0);
  b.trump      = mEngine->trump();
  b.analyze();
  return b;
}


// Game evaluation ratings
// Point ratings
const double RATING_SCHWARZ             = 100000.0;
const double RATING_SCHNEIDER           =  70000.0;
const double RATING_WON                 =  50000.0;
const double RATING_REMIS               =  20000.0;
const double RATING_ONE_POINT           =    500.0;
// Tactical ratings
const double RATING_AMOUNT_TRUMPCARD    = 3.0*RATING_ONE_POINT;
const double RATING_AMOUNT_GRANDCARD    = 15.0*RATING_ONE_POINT;
const double RATING_AMOUNT_OPENCARD     = 1.5*RATING_ONE_POINT;
const double RATING_AMOUNT_ACES         = 3.0*RATING_ONE_POINT;
const double RATING_AMOUNT_TENS         = 1.0*RATING_ONE_POINT;
const double RATING_AMOUNT_JACKS        = 8.5*RATING_ONE_POINT;
const double RATING_GOOD_MISSING_SUITE  = 3.5*RATING_ONE_POINT;

const double RATING_JACK_OF_CLUBS       = 0.8*RATING_ONE_POINT;
const double RATING_JACK_OF_SPADE       = 0.6*RATING_ONE_POINT;
const double RATING_JACK_OF_HEART       = 0.4*RATING_ONE_POINT;
const double RATING_JACK_OF_DIAMOND     = 0.2*RATING_ONE_POINT;

// Evaluate the current game board and return a rating
00154 double AiInput::evaluteGame(int p, const AiInput::Board& current)
{
  double rating = 0.0;

  // ===== Poins evaulation =====
  // Check for won games of our side
  if (current.points[p] == 120) rating += RATING_SCHWARZ;
  else if (current.points[p] >= 90) rating += RATING_SCHNEIDER;
  else if (current.points[p] > 60) rating += RATING_WON;
  else if (current.points[p] == 60) rating += RATING_REMIS;

  // Check for won games of other side
  if (current.points[1-p] == 120) rating -= RATING_SCHWARZ;
  else if (current.points[1-p] >= 90) rating -= RATING_SCHNEIDER;
  else if (current.points[1-p] > 60) rating -= RATING_WON;
  else if (current.points[1-p] == 60) rating -= RATING_REMIS;

  // Evaluate points
  rating += (current.points[p]-current.points[1-p])*RATING_ONE_POINT;

  // ===== Tactical evaulation =====
  // Number of trumps (Stored under index Grand)
  int trump1 = current.amountOfSuite[p][int(Grand)];
  int trump2 = current.amountOfSuite[1-p][int(Grand)];
  rating += (trump1-trump2)* RATING_AMOUNT_TRUMPCARD;
  // Increase value of trumps for Grand
  if (current.trump == Grand) rating += (trump1-trump2)* RATING_AMOUNT_TRUMPCARD;

  // Missing suites
 //if (current.amountOfSuite[p][int(Club)] == 0 && (trump1 > trump2)) rating += RATING_GOOD_MISSING_SUITE;
 //if (current.amountOfSuite[p][int(Spade)] == 0 && (trump1 > trump2)) rating += RATING_GOOD_MISSING_SUITE;
 //if (current.amountOfSuite[p][int(Heart)] == 0 && (trump1 > trump2)) rating += RATING_GOOD_MISSING_SUITE;
 //if (current.amountOfSuite[p][int(Diamond)] == 0 && (trump1 > trump2)) rating += RATING_GOOD_MISSING_SUITE;

 //if (current.amountOfSuite[1-p][int(Club)] == 0 && (trump1 < trump2)) rating -= RATING_GOOD_MISSING_SUITE;
 //if (current.amountOfSuite[1-p][int(Spade)] == 0 && (trump1 < trump2)) rating -= RATING_GOOD_MISSING_SUITE;
 //if (current.amountOfSuite[1-p][int(Heart)] == 0 && (trump1 < trump2)) rating -= RATING_GOOD_MISSING_SUITE;
 //if (current.amountOfSuite[1-p][int(Diamond)] == 0 && (trump1 < trump2)) rating -= RATING_GOOD_MISSING_SUITE;


  // Number of open cards
  int amount1 = amountOfOpenCards(p, current);
  int amount2 = amountOfOpenCards(1-p, current);
  rating += (amount1-amount2)* RATING_AMOUNT_OPENCARD;

  // Card types
  // Aces
  int amountAce1 = current.amountOfCardType[p][int(Ace)];
  int amountAce2 = current.amountOfCardType[1-p][int(Ace)];
  rating += (amountAce1-amountAce2)* RATING_AMOUNT_ACES;

  // Tens
  int amountTen1 = current.amountOfCardType[p][int(Ten)];
  int amountTen2 = current.amountOfCardType[1-p][int(Ten)];
  rating += (amountTen1-amountTen2)* RATING_AMOUNT_TENS;

  // Jacks
  int amountJack1 = current.amountOfCardType[p][int(Jack)];
  int amountJack2 = current.amountOfCardType[1-p][int(Jack)];
  rating += (amountJack1-amountJack2)* RATING_AMOUNT_JACKS;
  //kDebug() << "    Add rating(p="<<p<<") for jacks j1="<< amountJack1<<" j2="<<amountJack2<< " has JC=" << findCard(current, Club, Jack);

  if (findCard(current, Club, Jack) == p)    rating += RATING_JACK_OF_CLUBS;
  if (findCard(current, Spade, Jack) == p)   rating += RATING_JACK_OF_SPADE;
  if (findCard(current, Heart, Jack) == p)   rating += RATING_JACK_OF_HEART;
  if (findCard(current, Diamond, Jack) == p) rating += RATING_JACK_OF_DIAMOND;

  if (findCard(current, Club, Jack) == 1-p)    rating -= RATING_JACK_OF_CLUBS;
  if (findCard(current, Spade, Jack) == 1-p)   rating -= RATING_JACK_OF_SPADE;
  if (findCard(current, Heart, Jack) == 1-p)   rating -= RATING_JACK_OF_HEART;
  if (findCard(current, Diamond, Jack) == 1-p) rating -= RATING_JACK_OF_DIAMOND;
  //kDebug() << "    Rating after jacks" << rating;

  return rating;
}   


// Initiate a new move as first player
00232 AiInput::Move AiInput::initiateMove(int p, const AiInput::Board& board)
{
  AiInput::Move maxMove;
  maxMove.move  = -1;
  maxMove.value = -100.0*RATING_SCHWARZ; // Absolut minimum score
  
  // Loop all moves
  for (int m=0; m<8; m++)
  {
    AiInput::Board current(board);
    int card = current.takeCard(p, m);
    if (card < 0) continue; // Illegal move
    // Store move
    current.playedCard = card;
    current.whoseTurn = 1-p;
    if (global_debug > 5) kDebug() << "***** First mover try move on" << m << " ("<<Deck::name(card) <<")";
    AiInput::Move answer = answerMove(1-p, current);
    // Negate answering moves value to get our rating
    double rating = -answer.value;
    if (global_debug > 5) kDebug() << "First mover yields rating of" << rating;

    rating += rulebaseFirstMover(p, card, board);
    if (global_debug > 5) kDebug() << "  rulesbase correction to  "<<rating;

    // New best move?
    if (rating > maxMove.value)
    {
      maxMove.value = rating;
      maxMove.move  = m;
    }
  }
  
  return maxMove;
}


// Answer a move as second player
00269 AiInput::Move AiInput::answerMove(int p, const AiInput::Board& board)
{
  AiInput::Move maxMove;
  maxMove.move  = -1;
  maxMove.value = -100.0*RATING_SCHWARZ; // Absolut minimum score
  
  // Loop all moves
  for (int m=0; m<8; m++)
  {
    AiInput::Board current(board);
   // kDebug() << "CARD "<<m<< " is " 
    //          << Deck::name(current.cards[p][m]) << "on top of " 
    //          << Deck::name(current.cards[p][m+8]);

    int card = current.takeCard(p, m);
    if (card < 0) continue; // Illegal card

    // Check validity of move
    if (!isLegalMove(current.playedCard, card, p, current)) continue;

    // Check move winner
    int winner = EngineTwo::whoWonMove(current.playedCard, card, current.trump);
    if (global_debug > 5)
      kDebug() << "   Card" << m<< " (" << Deck::name(card) << ") is valid " 
                << "countering" << Deck::name(current.playedCard)<<" with "
                << "winner (0:other, 1:we) " << winner;
    int deltaPoints = 0;
    deltaPoints += Deck::getCardValue(current.playedCard);
    deltaPoints += Deck::getCardValue(card);
    // The first mover won
    if (winner == 0)
    {
      current.points[1-p] += deltaPoints;
    }
    // The second mover won (us)
    else
    {
      current.points[p] += deltaPoints;
    }

    double rating = evaluteGame(p, current);
    rating += rulebaseAnswerMover(p, card, board);


    if (global_debug > 5)
      kDebug() << "   Points after 2nd move "<<m<<" would be we: " 
                << current.points[p] << "other:" << current.points[1-p] 
                << "rating is thus" << rating;
    // New best move?
    if (rating > maxMove.value)
    {
      maxMove.value = rating;
      maxMove.move  = m;
    }
  }
  return maxMove;
}


// Board copy constructor
00329 AiInput::Board::Board(const AiInput::Board& board)
{
  for (int i=0;i<2;i++)
  {
    points[i] = board.points[i];
    for (int j=0;j<16;j++)
    {
      cards[i][j] = board.cards[i][j];
    }
    for (int j=0; j<5; j++)
    {
      amountOfSuite[i][j] = board.amountOfSuite[i][j];
    }
    for (int j=0; j<8; j++)
    {
      amountOfCardType[i][j] = board.amountOfCardType[i][j];
    }
  }
  for (int i=0; i<32; i++)
  {
    playedCards[i] = board.playedCards[i];
  }
  playedCard = board.playedCard;
  whoseTurn  = board.whoseTurn;
  firstPlay  = board.firstPlay;     
  trump      = board.trump;
}


// Retreive card at given position for given player
00359 int AiInput::Board::card(int p, int pos) const
{
  int card = cards[p][pos];  // 1st card
  if (card < 0)
  {
    card = cards[p][pos+8];  // 2nd card
  }
  return card;
}


// Check amount of cards at position, 
// i.e.  card on top (2), bottom(1), or none at all (0)
00372 int AiInput::Board::cardsAtPos(int p, int pos) const
{
  int card = cards[p][pos];  // 1st card
  if (card >= 0) return 2;
  card = cards[p][pos+8];  // 2nd card
  if (card >= 0) return 1;
  return 0;
}


// Retreive card at given position for given player and
// reset it (take it away)
00384 int AiInput::Board::takeCard(int p, int pos)
{
  int card = cards[p][pos];  // 1st card
  cards[p][pos] = -1;        // Can do in any case
  if (card < 0)
  {
    card = cards[p][pos+8];  // 2nd card
    cards[p][pos+8] = -1;    // Can do in any case
  }
  else
  {
    cards[p][pos+8] = -cards[p][pos+8];    // Do not look underneath card
  }
  analyze();
  return card;
}


// Perform pre board analyzation
// + Count how many of each color
00404 void AiInput::Board::analyze()
{
  // How many cards of given suite 
  for (int pl=0; pl<2; pl++)
  {
    for (int i=0;i<5;i++) amountOfSuite[pl][i] = 0;
    for (int i=0;i<8;i++) amountOfCardType[pl][i] = 0;
    for (int i=0;i<8;i++)
    {
      int c         = card(pl, i);
      if (c<0) continue;
      Suite suite   = Deck::getSuite(c);
      CardType type = Deck::getCardType(c);
      if (suite == trump || type==Jack) amountOfSuite[pl][Grand]++;
      else amountOfSuite[pl][int(suite)]++;
      amountOfCardType[pl][int(type)]++;
    }
  }
}


// Internal return values for find card
const int CARD_CURRENTLY_PLAYED  = 2;
const int CARD_PLAYED            = 3;

// Check where a card is:
// -1: unknown (still covered), 0: player 0, 1: player 1: 2: currently played, 2: already played
int AiInput::findCard(const AiInput::Board& current, Suite sSuite, CardType sCardType) const
{
  // Loop player's cards
  for (int p=0; p<2; p++)
  {
    for (int i=0;i<8;i++)
    {
      int card      = current.card(p, i);
      if (card < 0) continue;
      Suite suite   = Deck::getSuite(card);
      CardType type = Deck::getCardType(card);
      if (suite == sSuite && type == sCardType)
      {
        //kDebug() << "Found" << Deck::name(sSuite, sCardType) << "at" << p << "," << i;
        return p;
      }
    }
  }

  // Currently played card if any
  int card = current.playedCard;
  if (card >=0)
  {
    Suite suite   = Deck::getSuite(card);
    CardType type = Deck::getCardType(card);
    if (suite == sSuite && type==sCardType) 
    {
      //kDebug() << "Found" << Deck::name(sSuite, sCardType) << "as currently played card";
      return CARD_CURRENTLY_PLAYED;
    } 
  }

  // Already played cards
  for (int i=0; i<32 ;i++)
  {
    int card = current.playedCards[i];
    if (card < 0) continue;
    Suite suite   = Deck::getSuite(card);
    CardType type = Deck::getCardType(card);
    if (suite == sSuite && type==sCardType) 
    {
      //kDebug() << "Found" << Deck::name(sSuite, sCardType) << "as played card "<<i;
      return CARD_PLAYED;
    }
  }


  return -1;
  
}


// How many open cards has the given player
int AiInput::amountOfOpenCards(int p, const AiInput::Board& current) const
{
  int cnt = 0;
  for (int i=0;i<8;i++)
  {
    if (current.cardsAtPos(p, i) > 0) cnt++;
  }
  return cnt;
}


int AiInput::amountOfWinningCards(int p, Suite sSuite, const AiInput::Board& current) const
{
  int cnt = 0;
  for (int i=0;i<8;i++)
  {
    int card      = current.card(p, i);
    if (card < 0) continue;
    Suite suite   = Deck::getSuite(card);
    CardType type = Deck::getCardType(card);
    // Treat jacks as trump
    if (type == Jack) suite = Grand;
    // Check only right suite or trump cards
    if (sSuite != suite) continue;

    // Would we win this card?
    if (wouldWinMove(p, card, current)) cnt++;
  }
  return cnt;
}


// Check whether the given card would win a initial move
bool AiInput::wouldWinMove(int p, int card, const AiInput::Board& current) const
{
  Suite suite   = Deck::getSuite(card);
  CardType type = Deck::getCardType(card);
  if (type == Jack) suite = current.trump;

  // Check only right suite or trump cards
  if (suite != current.trump &&
      current.amountOfSuite[1-p][suite] == 0 && 
      current.amountOfSuite[1-p][Grand] > 0)
  {
    //kDebug() << "Player" << (1-p) << "can use trump against" << Deck::name(suite);
    return false;
  }

  // Other player has suite..check cards
  for (int j=0; j<8; j++)
  {
    int ocard      = current.card(1-p, j);
    if (ocard < 0) continue;
    Suite osuite   = Deck::getSuite(ocard);
    CardType otype = Deck::getCardType(ocard);
    if (otype == Jack) osuite = current.trump;

    // Check only right suite or trump cards
    if (suite == osuite)
    {
      // 0 if card wins ocards, 1 otherwise
      int owinner = EngineTwo::whoWonMove(card, ocard, current.trump);
      if (owinner == 1) 
      { 
        //kDebug() << "Player" << p << "looses" << Deck::name(card);
        return false;
      }
    }
  }
  //kDebug() << "Player" << p << "wins" << Deck::name(card);
  return true;
}

// Game evaluation ratings

// Try to save a free ten
const double RULE_FREE_TEN        =   20.0*RATING_ONE_POINT;
// Catch a free ten
const double RULE_CATCH_TEN       =   15.0*RATING_ONE_POINT;
// Use Ace to hunt free tens
const double RULE_HUNTER_ACE      =  -20.0*RATING_ONE_POINT;
// Do not free Ace to possibly hunt free tens
const double RULE_SUPPORT_ACE     =  -14.0*RATING_ONE_POINT;
// Protect possible free ten with minor card
const double RULE_PROTECT_TEN     =  -14.0*RATING_ONE_POINT;
// Protect possible free ten with removing hunter Ace
const double RULE_KILL_HUNTER_ACE =   25.0*RATING_ONE_POINT;
// Pull trumps
const double RULE_PULL_TRUMP      =   10.0*RATING_ONE_POINT;
// Save trumps
const double RULE_SAVE_TRUMP      =  -10.0*RATING_ONE_POINT;
// Stay first mover
const double RULE_FIRST_MOVER     =    4.0*RATING_ONE_POINT;


// Rule based override over board evaluation to tackle special szenarios
double AiInput::rulebaseFirstMover(int p, int card,  const AiInput::Board& current) const
{
  double result = 0.0;
  Suite suite   = Deck::getSuite(card);
  CardType type = Deck::getCardType(card);
  Suite altSuite  = (suite==current.trump || type == Jack)?Grand:suite;

  // Check whether we win the move    
  if (wouldWinMove(p, card, current))
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Staying first mover" << Deck::name(card);
    result += RULE_FIRST_MOVER;
  }

  // Protect free ten
  if (type == Ten &&
      findCard(current, suite, Ace) != CARD_PLAYED &&
      findCard(current, suite, Ace) != p &&
      wouldWinMove(p, card, current)
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Saving Ten" << Deck::name(card);
    result += RULE_FREE_TEN;
  }

  // Catch free ten
  if (type == Ace &&
      (1-p) == findCard(current, suite, Ten) &&
      hasAmount(1-p, altSuite, 1, 1, current) &&
      wouldWinMove(p, card, current) 
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Catching Ten with" << Deck::name(card);
    result += RULE_CATCH_TEN;
  }

  // Saving Ace to try to catch free ten
  if (type == Ace &&
      suite != current.trump &&
      (1-p) == findCard(current, suite, Ten) &&
      hasAmount(1-p, suite, 2, 3, current)
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Hunting Ten with" << Deck::name(card);
    result += RULE_HUNTER_ACE;
  }

  // Saving additional cards for hunter Ace
  if (suite != current.trump &&
       type != Jack &&
       type != Ace &&
      (1-p) == findCard(current, suite, Ten) &&
      (p) == findCard(current, suite, Ace) &&
      hasAmount(1-p, suite, 2, 3, current) 
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Supporting Hunter ACE with" << Deck::name(card);
    if (hasAmount(1-p, suite, 2, 2, current)) result += RULE_SUPPORT_ACE;
    else result += 0.75*RULE_SUPPORT_ACE;
  }

  // Saving additional cards for hunted Ten
  if (suite != current.trump &&
       type != Jack &&
       type != Ten &&
      (1-p) == findCard(current, suite, Ace) &&
      (p) == findCard(current, suite, Ten) &&
      hasAmount(p, suite, 2, 3, current) &&
      hasAmount(1-p, suite, 2, 11, current) 
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Protecting hunted TEN with" << Deck::name(card);
    if (hasAmount(p, suite, 2, 2, current)) result += RULE_PROTECT_TEN;
    else result += 0.5*RULE_PROTECT_TEN;
  }

  // Killing hunter Ace
  if (suite != current.trump &&
       type != Jack &&
       type != Ten &&
      (1-p) == findCard(current, suite, Ace) &&
      (p) == findCard(current, suite, Ten) &&
      hasAmount(p, suite, 2, 11, current) &&
      hasAmount(1-p, suite, 1, 1, current) 
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER RULE: Killing hunter ACE with" << Deck::name(card);
    result += RULE_KILL_HUNTER_ACE;
  }

  // Pull trumps
  if (altSuite == Grand)
  {
    int trumpWin1 = amountOfWinningCards(p, altSuite, current);
    //int trumpWin2 = amountOfWinningCards(1-p, altSuite, current);
    int trump1    = current.amountOfSuite[p][int(altSuite)];
    int trump2    = current.amountOfSuite[1-p][int(altSuite)];
    // Pull trump
    if (
        trumpWin1 >= trump2 &&
        trump1 > trump2 &&
        trump2 > 0 &&
        wouldWinMove(p, card, current)  )
    {
      if (global_debug>1) kDebug() << "TRIGGER RULE: Pull trump" << Deck::name(card);
      result += RULE_PULL_TRUMP;
    }

    // Do not play trump if other party has none
    if (trump2 == 0)
    {
      if (global_debug>1) kDebug() << "TRIGGER RULE: Save trump" << Deck::name(card);
      if (trump1 == 1) result += RULE_SAVE_TRUMP;
      else if (trump1 == 2) result += 0.75*RULE_SAVE_TRUMP;
      else result += 0.5*RULE_SAVE_TRUMP;
    }
  }

  return result;
}

// Rule based override over board evaluation to tackle special szenarios
double AiInput::rulebaseAnswerMover(int p, int card,  const AiInput::Board& current) const
{
  double result = 0.0;
  Suite suite   = Deck::getSuite(card);
  CardType type = Deck::getCardType(card);
  Suite altSuite  = (suite==current.trump || type == Jack)?Grand:suite;

  // Check whether we win the move    
  if (wouldWinMove(p, card, current))
  {
    if (global_debug>1) kDebug() << "TRIGGER ANSWER RULE: Becoming first mover" << Deck::name(card);
    result += RULE_FIRST_MOVER;
  }

  // Saving Ace to try to catch free ten
  if (type == Ace &&
      suite != current.trump &&
      (1-p) == findCard(current, suite, Ten) &&
      hasAmount(1-p, suite, 1, 2, current) &&
      hasAmount(p, suite, 2, 3, current)
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER ANSWER RULE: Hunting Ten with" << Deck::name(card);
    result += RULE_HUNTER_ACE;
  }

  // Saving additional cards for hunter Ace
  if (suite != current.trump &&
       type != Jack &&
       type != Ace &&
      (1-p) == findCard(current, suite, Ten) &&
      (p) == findCard(current, suite, Ace) &&
      hasAmount(1-p, suite, 1, 2, current) 
     )
  {
    if (global_debug>1) kDebug() << "TRIGGER ANSWER RULE: Supporting Hunter ACE with" << Deck::name(card);
    if (hasAmount(1-p, suite, 1, 1, current)) result += RULE_SUPPORT_ACE;
    else result += 0.75*RULE_SUPPORT_ACE;
  }


  return result;
}


// Check whether the given player has between [min,max] cards of the given suite
bool AiInput::hasAmount(int player, Suite suite, int min, int max, const AiInput::Board& current) const
{
  if (current.amountOfSuite[player][int(suite)] >= min &&
       current.amountOfSuite[player][int(suite)] <= max)
  {
    return true;
  }
  return false;
}


// Check whether the two cards played are legal, supposed the
// given player is the second one (as the first player always
// plays a legal card)
bool AiInput::isLegalMove(int card1, int card2, int pl, const AiInput::Board& current) const
{
  Suite suite1   = Deck::getSuite(card1);
  Suite suite2   = Deck::getSuite(card2);
  CardType type1 = Deck::getCardType(card1);
  CardType type2 = Deck::getCardType(card2);

  // Force trump colour as Jacks count as Trump
  if (type1 == Jack) suite1 = current.trump;
  if (type2 == Jack) suite2 = current.trump;

  // Same suite is always ok
  if (suite1 == suite2) return true;

  // Search if current player has a card of the same colour
  // but didn't play it (if it was played we checked already
  // above)
  for (int i=0;i<8;i++)
  {
    int card = current.card(pl, i);
    // This card is not available anymore
    if (card < 0) continue;
 //   if (type1 == Jack) kDebug() << "Check card 2 " <<Deck::name(card);

    // Ignore played card
    if (card == card2) continue;

    // Analyse card
    Suite suite   = Deck::getSuite(card);
    CardType type = Deck::getCardType(card);

    // Force trump colour as Jacks count as Trump
    if (type == Jack) suite = current.trump;

    // Check whether current card matches the first player card
    if (suite == suite1)
    {
      return false;
    }
  }
//    if (type1 == Jack) kDebug() << "ALLOWED  ";
  return true;
}

#include "aiinput.moc"

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