from __future__ import division
import argparse
import sys
import re
import time
import os
import threading
from game import Game
from engine import GTPEngine
from utils import Data
import utils
from time import gmtime, strftime

python_version = sys.version_info

if python_version < (3, 0):
    import cPickle
else:
    import _pickle as cPickle


def play(engine, data_path):
    data = Data()
    role = ["BLACK", "WHITE"]
    color = ['b', 'w']

    pattern = "[A-Z]{1}[0-9]{1}"
    space = re.compile("\s+")
    size = {"go": 9, "reversi": 8}
    show = ['.', 'X', 'O']

    evaluate_rounds = 5
    game_num = 0
    total = 0
    f=open('time.txt','w')
    #while True:
    while game_num < evaluate_rounds:
        start = time.time()
        engine._game.model.check_latest_model()
        num = 0
        pass_flag = [False, False]
        print("Start game {}".format(game_num))
        # end the game if both palyer chose to pass, or play too much turns
        while not (pass_flag[0] and pass_flag[1]) and num < size[engine._game.name] ** 2 * 2:
            turn = num % 2
            board = engine.run_cmd(str(num) + ' show_board')
            board = eval(board[board.index('['):board.index(']') + 1])
            for i in range(size[engine._game.name]):
                for j in range(size[engine._game.name]):
                    print show[board[i * size[engine._game.name] + j]] + " ",
                print "\n",
            data.boards.append(board)
            move = engine.run_cmd(str(num) + ' genmove ' + color[turn])[:-1]
            print("\n" + role[turn] + " : " + str(move)),
            num += 1
            match = re.search(pattern, move)
            if match is not None:
                # print "match : " + str(match.group())
                pass_flag[turn] = False
            else:
                # print "no match"
                pass_flag[turn] = True
            prob = engine.run_cmd(str(num) + ' get_prob')
            prob = space.sub(',', prob[prob.index('['):prob.index(']') + 1])
            prob = prob.replace('[,', '[')
            prob = prob.replace('],', ']')
            prob = eval(prob)
            data.probs.append(prob)
        score = engine.run_cmd(str(num) + ' get_score')
        print("Finished : {}".format(score.split(" ")[1]))
        if eval(score.split(" ")[1]) > 0:
            data.winner = utils.BLACK
        if eval(score.split(" ")[1]) < 0:
            data.winner = utils.WHITE
        engine.run_cmd(str(num) + ' clear_board')
        current_time = strftime("%Y%m%d_%H%M%S", gmtime())
        if os.path.exists(data_path + current_time + ".pkl"):
            time.sleep(1)
            current_time = strftime("%Y%m%d_%H%M%S", gmtime())
        with open(data_path + current_time + ".pkl", "wb") as file:
            cPickle.dump(data, file)
        data.reset()
        game_num += 1
        
        this_time = time.time() - start
        total += this_time
        f.write('time:'+ str(this_time)+'\n')
    f.write('Avg time:' + str(total/evaluate_rounds))
    f.close()
    


if __name__ == '__main__':
    """
    Starting two different players which load network weights to evaluate the winning ratio.
    Note that, this function requires the installation of the Pyro4 library.
    """
    # TODO : we should set the network path in a more configurable way.
    parser = argparse.ArgumentParser()
    parser.add_argument("--data_path", type=str, default="./data/")
    parser.add_argument("--black_weight_path", type=str, default=None)
    parser.add_argument("--white_weight_path", type=str, default=None)
    parser.add_argument("--save_path", type=str, default="./go/")
    parser.add_argument("--debug", action="store_true", default=False)
    parser.add_argument("--game", type=str, default="go")
    parser.add_argument("--train", action="store_true", default=False)
    args = parser.parse_args()

    if not os.path.exists(args.data_path):
        os.mkdir(args.data_path)
    # black_weight_path = "./checkpoints"
    # white_weight_path = "./checkpoints_origin"
    if args.black_weight_path is not None and (not os.path.exists(args.black_weight_path)):
        raise ValueError("Can't find the network weights for black player.")
    if args.white_weight_path is not None and (not os.path.exists(args.white_weight_path)):
        raise ValueError("Can't find the network weights for white player.")

    game = Game(name=args.game,
                black_checkpoint_path=args.black_weight_path,
                white_checkpoint_path=args.white_weight_path,
                debug=args.debug)
    engine = GTPEngine(game_obj=game, name='tianshou', version=0)

    thread_list = []
    thread_train = threading.Thread(target=game.model.train, args=("file",),
                                    kwargs={'data_path':args.data_path, 'batch_size':128, 'save_path':args.save_path})
    thread_play = threading.Thread(target=play, args=(engine, args.data_path))
    if args.train:
        thread_list.append(thread_train)
    thread_list.append(thread_play)

    for t in thread_list:
        t.daemon = True
        t.start()

    while True:
        time.sleep(1)
    #for t in thread_list:
    #    t.join()