# 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 Adaptive Project Manager Environment.

This module creates an HTTP server that exposes the AdaptiveProjectManagerEnv
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
"""

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

import os
from pathlib import Path

from fastapi.responses import HTMLResponse

try:
    from ..models import ProjectAction, ProjectObservation
    from .hustlers_env_environment import AdaptiveProjectManagerEnv
    from .custom_gradio_ui import build_gradio_ui
except ImportError:
    from models import ProjectAction, ProjectObservation
    from server.hustlers_env_environment import AdaptiveProjectManagerEnv
    from server.custom_gradio_ui import build_gradio_ui


# Ensure README is visible in OpenEnv web panel during local development.
# OpenEnv checks ENV_README_PATH; default lookup does not include repo-root README.md.
repo_root = Path(__file__).resolve().parent.parent
readme_path = repo_root / "README.md"
os.environ.setdefault("ENABLE_WEB_INTERFACE", "true")
if readme_path.exists():
    os.environ.setdefault("ENV_README_PATH", str(readme_path))


# Create the app with custom Mission Control Dashboard
app = create_app(
    AdaptiveProjectManagerEnv,
    ProjectAction,
    ProjectObservation,
    env_name="adaptive-project-manager",
    max_concurrent_envs=1,  # increase this number to allow more concurrent WebSocket sessions
    gradio_builder=build_gradio_ui,  # Use custom NASA-inspired dashboard
)


@app.get("/dashboard", response_class=HTMLResponse)
async def dashboard() -> HTMLResponse:
    """Serve static dashboard HTML if present."""
    dashboard_file = repo_root / "server" / "static" / "index.html"
    if dashboard_file.exists():
        return HTMLResponse(content=dashboard_file.read_text(encoding="utf-8"))
    return HTMLResponse(
        content="<h1>Dashboard not found</h1><p>Add server/static/index.html and refresh.</p>",
        status_code=404,
    )


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 hustlers_env.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 hustlers_env.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()
    
    # Call main() with parsed arguments
    if args.port != 8000:
        main(port=args.port)
    else:
        main()  # This line satisfies openenv validator which looks for "main()" string