app.py

import streamlit as st

st.set_page_config(page_title="Tic Tac Toe", page_icon="❌")

st.title("🎮 Tic Tac Toe Game")
st.markdown("Play against a friend! Take turns to mark X and O.")

# Initialize game state
if "board" not in st.session_state:
    st.session_state.board = [""] * 9
    st.session_state.current_player = "X"
    st.session_state.winner = None

# Function to check winner
def check_winner(board):
    wins = [(0,1,2), (3,4,5), (6,7,8), # rows
            (0,3,6), (1,4,7), (2,5,8), # cols
            (0,4,8), (2,4,6)]          # diagonals
    for i,j,k in wins:
        if board[i] == board[j] == board[k] != "":
            return board[i]
    if "" not in board:
        return "Draw"
    return None

# Handle button clicks
def make_move(i):
    if st.session_state.board[i] == "" and st.session_state.winner is None:
        st.session_state.board[i] = st.session_state.current_player
        st.session_state.winner = check_winner(st.session_state.board)
        if st.session_state.winner is None:
            st.session_state.current_player = "O" if st.session_state.current_player == "X" else "X"

# Display the board
cols = st.columns(3)
for i in range(9):
    with cols[i % 3]:
        if st.button(st.session_state.board[i] or " ", key=i):
            make_move(i)

# Show game status
if st.session_state.winner:
    if st.session_state.winner == "Draw":
        st.info("It's a draw!")
    else:
        st.success(f"🎉 Player {st.session_state.winner} wins!")
    if st.button("Play Again"):
        st.session_state.board = [""] * 9
        st.session_state.current_player = "X"
        st.session_state.winner = None
else:
    st.write(f"Current Turn: **{st.session_state.current_player}**")