# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.

"""
FastAPI application for the Edupilot Environment.

This module creates an HTTP server that exposes the EdupilotEnvironment
over HTTP and WebSocket endpoints, compatible with EnvClient.

Endpoints:
    - POST /reset: Reset the environment
    - POST /step: Execute an action
    - GET /state: Get current environment state
    - GET /schema: Get action/observation schemas
    - WS /ws: WebSocket endpoint for persistent sessions

Usage:
    # Development (with auto-reload):
    uvicorn server.app:app --reload --host 0.0.0.0 --port 8000

    # Production:
    uvicorn server.app:app --host 0.0.0.0 --port 8000 --workers 4

    # Or run directly:
    python -m server.app
"""

from openenv.core.env_server.interfaces import Environment

try:
    from openenv.core.env_server.http_server import create_app
    from openenv.core.env_server.web_interface import create_web_interface_app
except Exception as e:  # pragma: no cover
    raise ImportError(
        "openenv is required for the web interface. Install dependencies with '\n    uv sync\n'"
    ) from e

try:
    from ..models import EdupilotAction, EdupilotObservation
    from .EduPilot_environment import EdupilotEnvironment
except ImportError:
    from models import EdupilotAction, EdupilotObservation
    from server.EduPilot_environment import EdupilotEnvironment

from pathlib import Path

import dotenv
from dotenv import dotenv_values, load_dotenv

env_file_name = ".env"
env_dir = Path(__file__).parent.parent.resolve()
env_file_path = f"{env_dir}/{env_file_name}"
load_dotenv(env_file_path)

# Create the app with web interface and README integration
app = create_app(
    EdupilotEnvironment,
    EdupilotAction,
    EdupilotObservation,
    env_name="EduPilot",
    max_concurrent_envs=1,  # increase this number to allow more concurrent WebSocket sessions
)

web_app = create_web_interface_app(
    env=EdupilotEnvironment,
    action_cls=EdupilotAction,
    observation_cls=EdupilotObservation,
    env_name="EduPilot",
)


def main(host: str = "0.0.0.0", port: int = 8000):
    """
    Entry point for direct execution via uv run or python -m.

    This function enables running the server without Docker:
        uv run --project . server
        uv run --project . server --port 8001
        python -m EduPilot.server.app

    Args:
        host: Host address to bind to (default: "0.0.0.0")
        port: Port number to listen on (default: 8000)

    For production deployments, consider using uvicorn directly with
    multiple workers:
        uvicorn EduPilot.server.app:app --workers 4
    """
    import uvicorn

    uvicorn.run(app, host=host, port=port)


if __name__ == "__main__":
    import argparse

    parser = argparse.ArgumentParser()
    parser.add_argument("--port", type=int, default=8000)
    args = parser.parse_args()
    main(port=args.port)

if __name__ == "__main__":
    # Call your main function here, for example:
    # app.run() or main()
    pass