# 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 Ppt Agent Environment.

This module creates an HTTP server that exposes the PptAgentEnvironment
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 7860

    # Production:
    uvicorn server.app:app --host 0.0.0.0 --port 7860 --workers 4

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

from openenv.core.env_server.http_server import create_app

from ..models import PptAgentAction, PptAgentObservation
from .ppt_agent_environment import PptAgentEnvironment
from .utils.reward_metrics import preload_similarity_model


# Create the app with web interface and README integration
app = create_app(
    PptAgentEnvironment,
    PptAgentAction,
    PptAgentObservation,
    env_name="ppt_agent",
    max_concurrent_envs=4,
)


@app.on_event("startup")
def preload_models() -> None:
    preload_similarity_model()


def main(host: str = "0.0.0.0", port: int = 7860):
    """
    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 ppt_agent.server.app

    Args:
        host: Host address to bind to (default: "0.0.0.0")
        port: Port number to listen on (default: 7860)

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

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


if __name__ == "__main__":
    main()