import os
import json
import tempfile
from datetime import datetime, timezone
from huggingface_hub import hf_hub_download, upload_file
from huggingface_hub.utils import HfHubHTTPError

# Constant for the dataset repository, configurable via environment variable
DATASET_REPO = os.getenv("HF_DATASET_REPO", "Jofthomas/geoguessr_game_of_the_day")
BLOCK_MULTIPLE_GAMES = os.getenv("Block_Multiple_games", "False") == "true"

def get_todays_records_path() -> str:
    """Gets the path for today's game records file, e.g., 'records/2025-10-03.json'."""
    date_str = datetime.now(timezone.utc).strftime('%Y-%m-%d')
    return f"records/{date_str}.json"

def get_todays_games(token: str) -> list:
    """
    Downloads and reads the game records for the current day from the HF Hub.
    Returns an empty list if the file for today doesn't exist yet.
    """
    filepath = get_todays_records_path()
    try:
        # Use the provided token for read access
        local_path = hf_hub_download(
            repo_id=DATASET_REPO,
            filename=filepath,
            repo_type="dataset",
            token=token,
        )
        with open(local_path, "r", encoding="utf-8") as f:
            return json.load(f)
    except HfHubHTTPError as e:
        if e.response.status_code == 404:
            return []  # No games played today yet, which is normal.
        else:
            print(f"Error downloading daily records: {e}")
            raise  # Re-raise other HTTP errors
    except Exception as e:
        print(f"An unexpected error occurred while getting today's games: {e}")
        return []

def has_user_played_today(username: str, todays_games: list) -> bool:
    """Checks if a user has completed a game today."""
    today_date = datetime.now(timezone.utc).date().isoformat()
    
    for game in todays_games:
        if game.get("username") == username and game.get("completed", False):
            # Additional check: ensure the game's timestamp is from today
            game_timestamp = game.get("timestamp", "")
            if game_timestamp:
                try:
                    game_date = datetime.fromisoformat(game_timestamp.replace('Z', '+00:00')).date().isoformat()
                    if game_date == today_date:
                        return True
                except:
                    # If we can't parse the timestamp, assume it's from today (since it's in todays_games)
                    return True
            else:
                # If no timestamp, assume it's from today (since it's in todays_games)
                return True
    return False

def get_user_game_today(username: str, todays_games: list, game_id: str = None) -> dict:
    """
    Gets the user's game record for today, if it exists.
    If game_id is provided, returns the specific game with that ID.
    Otherwise, returns the first game found for the user.
    """
    for game in todays_games:
        if game.get("username") == username:
            if game_id and game.get("game_id") == game_id:
                return game
            elif not game_id:
                return game
    return None

def update_game_record(username: str, game_id: str, round_data: dict = None, final_score: float = None, final_ai_score: float = None):
    """
    Updates or creates a game record for a user after each round.
    This ensures data is recorded incrementally and prevents abuse.
    
    Args:
        username: The player's username
        game_id: Unique identifier for this game session
        round_data: Single round details to append to the record
        final_score: Final total human score (only set when game is complete)
        final_ai_score: Final total AI score (only set when game is complete)
    """
    write_token = os.getenv("HF_TOKEN", "")
    if not write_token:
        print("Warning: Server HF_TOKEN not set. Cannot record game data.")
        return

    try:
        # Fetch the latest records
        todays_games = get_todays_games(token=write_token)
        
        # Find existing game record for this user today with this specific game_id
        existing_game = get_user_game_today(username, todays_games, game_id)
        
        if existing_game:
            # Update existing record
            if round_data:
                if "rounds" not in existing_game:
                    existing_game["rounds"] = []
                existing_game["rounds"].append(round_data)
            if final_score is not None:
                existing_game["human_score"] = float(round(final_score))
                existing_game["completed"] = True
            if final_ai_score is not None:
                existing_game["ai_score"] = float(round(final_ai_score))
        else:
            # Create new game record
            game_record = {
                "username": username,
                "game_id": game_id,
                "human_score": 0.0,  # Will be updated when game completes
                "ai_score": 0.0,  # Will be updated when game completes
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "rounds": [round_data] if round_data else [],
                "completed": False
            }
            todays_games.append(game_record)

        filepath_in_repo = get_todays_records_path()

        with tempfile.NamedTemporaryFile(mode="w+", delete=False, suffix=".json", encoding="utf-8") as tmp_file:
            json.dump(todays_games, tmp_file, indent=2)
            tmp_file_path = tmp_file.name

        upload_file(
            path_or_fileobj=tmp_file_path,
            path_in_repo=filepath_in_repo,
            repo_id=DATASET_REPO,
            repo_type="dataset",
            token=write_token,
            commit_message=f"Update game for {username}"
        )
        print(f"Successfully updated game record for {username}")

    except Exception as e:
        print(f"Error updating game record for {username}: {e}")
    finally:
        if 'tmp_file_path' in locals() and os.path.exists(tmp_file_path):
            os.remove(tmp_file_path)

def record_game(username: str, score: float, rounds_data: list = None, ai_score: float = None, game_id: str = None):
    """
    Legacy function - now just calls update_game_record with final score.
    Kept for backwards compatibility.
    """
    if not game_id:
        import uuid
        game_id = str(uuid.uuid4())
    update_game_record(username, game_id, final_score=score, final_ai_score=ai_score)