CPG/src/Chess/player.nim

import board as chess
import std/strformat
import std/strutils





when isMainModule:
    setControlCHook(proc () {.noconv.} = echo ""; quit(0))
    var 
        board = newChessboardFromFEN("rnbqkbnr/2p/8/8/8/8/P7/RNBQKBNR w KQkq - 0 1")
        data: string
        move: Move

    echo "\x1Bc"
    while true:
        echo &"{board.pretty()}"
        echo &"Turn: {board.getActiveColor()}"
        echo &"Moves: {board.getMoveCount()} full, {board.getHalfMoveCount()} half"
        stdout.write(&"En passant target: ")
        if board.getEnPassantTarget() != emptyLocation():
            echo board.getEnPassantTarget().locationToAlgebraic()
        else:
            echo "None"
        stdout.write(&"Check: ")
        if board.inCheck():
            echo &"Yes"
        else:
            echo "No"
        stdout.write("\nMove -> ")
        try:
            data = readLine(stdin).strip(chars={'\0', ' '})
        except IOError:
            echo ""
            break
        if data == "undo":
            echo &"\x1BcUndo: {board.undoLastMove()}"
            continue
        if len(data) != 4:
            echo "\x1BcError: invalid move"
            continue
        try:
            move = board.makeMove(data[0..1], data[2..3])
        except ValueError:
            echo &"\x1BcError: {getCurrentExceptionMsg()}"
        if move == emptyMove():
            echo &"\x1BcError: move is illegal"
        else:
            echo "\x1Bc"