Contract con_tictactoe_v19

  

    

      

        

            
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### # This is a simple smart contract # All Lamden smart contracts are programmed in Python # For complete contracting documentation please visit https://contracting.lamden.io/ ### 
          

            
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# import random
          

            
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random.seed() 
          

            
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games = Hash(default_value=False)
          

            
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metadata = Hash() 
          

            
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@construct 
          

            
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def seed(): 
          

            
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    metadata['operator'] = ctx.caller 
          

            
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@export
          

            
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def change_metadata(key: str, value: Any):
          

            
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    assert ctx.caller == metadata['operator'], 'Only operator can set metadata!'
          

            
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    metadata[key] = value
          

            
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@export 
          

            
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def create_game(): 
          

            
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    sender = ctx.caller 
          

            
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    assert games[sender] == False, 'Game already in progress'
          

            
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    first = random.randint(0, 99) 
          

            
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    # 0 = not set, 1 = O, 2 = X 
          

            
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    if(first <50): first = 1 # Player goes first else: first = 2 # Computer goes first 
          

            
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    games[sender] = {'first': first, 'state': [0, 0, 0, 0, 0, 0, 0, 0, 0], 'turn': 0} 
          

            
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    return games[sender] 
          

            
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@export 
          

            
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def end_game(): 
          

            
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    games[ctx.caller] = False
          

            
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@export
          

            
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def player_selection(i: int):
          

            
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    sender = ctx.caller
          

            
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    game = games[sender]
          

            
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    assert not(game == False), 'No game already in progress'
          

            
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    game['state'][i] = 1
          

            
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    assert not(game['state'][i] == 0), f'square {i} is already closed'
          

            
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    game['turn'] = game['turn'] + 1
          

            
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    win = False 
          

            
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    if(game['turn'] >= 9): 
          

            
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        games[sender] = False
          

            
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        return "{'winner': 0, 'state': " + f"{game['state']}" + "}" 
          

            
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    if(game['turn'] >= 5 and checkWin(game['state'], 1)): 
          

            
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        games[sender] = False
          

            
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        return "{'winner': 1, 'state': " + f"{game['state']}" +"}"
          

            
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    else: 
          

            
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        computerSelects = random.randint(0, 8) 
          

            
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        while(game['state'][computerSelects] != 0):
          

            
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            computerSelects = random.randint(0, 8)
          

            
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        game['state'][computerSelects] = 2
          

            
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        game['turn'] = game['turn'] + 1
          

            
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        if(game['turn'] >= 9):
          

            
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            games[sender] = False
          

            
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            return "{'winner': 0, 'state': " + f"{game['state']}" + "}"
          

            
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        if(game['turn'] >= 5 and checkWin(game['state'], 2)): 
          

            
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            games[sender] = False 
          

            
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            return "{'winner': 2, 'state': " + f"{game['state']}" + "}" 
          

            
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    games[sender] = game
          

            
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    return f'{game}'
          

            
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def checkWin(state, x: int): 
          

            
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    if(state[0] == x): # top left
          

            
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        if(state[1] == x and state[1] == x): #top row 
          

            
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            return True
          

            
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        if(state[3] == x and state[6] == x): #left column
          

            
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            return x
          

            
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        if(state[4] == x and state[8] == x): # diagnal top left to bottom right 
          

            
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            return True
          

            
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    if(state[1] == x): # top middle 
          

            
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        if(state[4] == x and state[7] == x): # middle column
          

            
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            return True
          

            
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    if(state[2] == x): # top right 
          

            
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        if(state[5] == x and state[8] == x): #right column 
          

            
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            return True
          

            
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        if(state[4] == x and state[6] == x): # diagnal top right to bottom left 
          

            
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            return True
          

            
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    if(state[3] == x): # top middle
          

            
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        if(state[4] == x and state[5] == x): # middle row 
          

            
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            return True
          

            
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    if(state[6] == x): # top middle
          

            
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        if(state[7] == x and state[8] == x): # bottom row 
          

            
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            return True
          

            
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    return False
          

            
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# print(checkWin([1, 2, 0, 2, 1, 0, 0, 0, 1], 1))
          
      
    
  
  

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