import streamlit as st
import json
import random
import time
import os

# Constants
GRID_SIZE = 10
MAX_PLAYERS = 10
UPDATE_INTERVAL = 3
GAME_STATE_FILE = "game_state.json"

# Initialize session state
if "player_name" not in st.session_state:
    st.session_state.player_name = f"Player_{random.randint(1000, 9999)}"
if "selected_player" not in st.session_state:
    st.session_state.selected_player = None

# Function to load game state
def load_game_state():
    if os.path.exists(GAME_STATE_FILE):
        with open(GAME_STATE_FILE, "r") as f:
            return json.load(f)
    return {"players": {}}

# Function to save game state
def save_game_state(state):
    with open(GAME_STATE_FILE, "w") as f:
        json.dump(state, f)

# Function to update player position
def update_player_position(player_name, x, y):
    state = load_game_state()
    if player_name in state["players"]:
        state["players"][player_name]["x"] = x
        state["players"][player_name]["y"] = y
    else:
        if len(state["players"]) < MAX_PLAYERS:
            state["players"][player_name] = {"x": x, "y": y}
    save_game_state(state)

# Streamlit app
st.title("Multiplayer Grid Game")

# Display player name and allow updates
player_name = st.text_input("Your name", value=st.session_state.player_name)
if player_name != st.session_state.player_name:
    st.session_state.player_name = player_name
    update_player_position(player_name, GRID_SIZE // 2, GRID_SIZE // 2)

# Create grid
grid = st.empty()

# Main game loop
while True:
    # Load current game state
    game_state = load_game_state()
    
    # Create grid representation
    grid_repr = [["." for _ in range(GRID_SIZE)] for _ in range(GRID_SIZE)]
    for player, pos in game_state["players"].items():
        x, y = pos["x"], pos["y"]
        grid_repr[y][x] = player[0].upper()
    
    # Display grid
    grid.text("\n".join(" ".join(row) for row in grid_repr))
    
    # Handle player movement
    col1, col2 = st.columns(2)
    with col1:
        if st.button("Select Your Character"):
            st.session_state.selected_player = st.session_state.player_name
    
    with col2:
        if st.session_state.selected_player:
            target_x = st.number_input("Target X", min_value=0, max_value=GRID_SIZE-1, value=GRID_SIZE//2)
            target_y = st.number_input("Target Y", min_value=0, max_value=GRID_SIZE-1, value=GRID_SIZE//2)
            if st.button("Move"):
                update_player_position(st.session_state.player_name, target_x, target_y)
    
    # Wait for update interval
    time.sleep(UPDATE_INTERVAL)
    st.experimental_rerun()