# 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 Debugzero Environment.

This module creates an HTTP server that exposes the DebugzeroEnvironment
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
"""
import os

# Definitively enable the web interface for this deployment
os.environ["ENABLE_WEB_INTERFACE"] = "true"

try:
    from openenv.core.env_server.http_server import create_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 DebugzeroAction, DebugzeroObservation
    from .debugZero_environment import DebugzeroEnvironment
except ImportError:
    from models import DebugzeroAction, DebugzeroObservation
    from server.debugZero_environment import DebugzeroEnvironment


# Create the app with web interface and README integration
app = create_app(
    DebugzeroEnvironment,
    DebugzeroAction,
    DebugzeroObservation,
    env_name="debugZero",
    max_concurrent_envs=10,  # increase this number to allow more concurrent WebSocket sessions
)


def main():
    """
    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 debugZero.server.app
    """
    import uvicorn
    import argparse
    
    parser = argparse.ArgumentParser()
    parser.add_argument("--host", type=str, default="0.0.0.0")
    parser.add_argument("--port", type=int, default=8000)
    args = parser.parse_args()
    
    uvicorn.run(app, host=args.host, port=args.port)


if __name__ == '__main__':
    main()