"""
Parlay — main application entry point.
Starts FastAPI with Dashboard + OpenEnv WebSocket + static file serving.

Usage:
    uvicorn main:app --host 0.0.0.0 --port 8000 --reload
"""
import logging
import os
from contextlib import asynccontextmanager
from pathlib import Path

from dotenv import load_dotenv

# Load project root .env so GOOGLE_API_KEY and other secrets are in os.environ
# (uvicorn does not read .env by itself — without this, only shell-exported vars apply.)
load_dotenv(Path(__file__).resolve().parent / ".env")

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse, Response

from parlay_env.server import router as env_router
from dashboard.api import router as dashboard_router

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s %(levelname)s %(name)s: %(message)s",
)
logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Initialize DB and resources on startup."""
    logger.info("Parlay starting up...")
    try:
        from scripts.init_db import init_db
        await init_db()
        logger.info("Database initialized")
    except Exception as exc:
        logger.warning(f"DB init failed (continuing): {exc}")
    yield
    logger.info("Parlay shutting down.")


app = FastAPI(
    title="Parlay",
    description="OpenEnv-compliant RL negotiation environment. Train agents, play scenarios.",
    version="1.0.0",
    lifespan=lifespan,
)

# CORS — permissive for dev; restrict origins in prod
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Routers
app.include_router(env_router)
app.include_router(dashboard_router)

# Serve static files
static_dir = Path("dashboard/static")
if static_dir.exists():
    app.mount("/static", StaticFiles(directory=str(static_dir)), name="static")

os.makedirs("results", exist_ok=True)
try:
    app.mount(
        "/results", StaticFiles(directory="results"), name="results"
    )
except OSError as exc:
    logger.warning("Could not mount /results: %s", exc)

os.makedirs("images", exist_ok=True)
try:
    app.mount("/images", StaticFiles(directory="images"), name="images")
except OSError as exc:
    logger.warning("Could not mount /images: %s", exc)


@app.get("/", include_in_schema=False)
async def serve_index() -> FileResponse:
    """Serve the main game dashboard."""
    return FileResponse(
        "dashboard/index.html",
        headers={"Cache-Control": "no-cache, must-revalidate"},
    )


@app.get("/spectate", include_in_schema=False)
async def serve_spectate() -> FileResponse:
    """Serve the spectator dashboard."""
    return FileResponse(
        "dashboard/spectate.html",
        headers={"Cache-Control": "no-cache, must-revalidate"},
    )


@app.get("/train", include_in_schema=False)
async def serve_train_results() -> FileResponse:
    """Training results: plots, eval JSON, model hub CTA."""
    return FileResponse(
        "dashboard/train_results.html",
        headers={"Cache-Control": "no-cache, must-revalidate"},
    )


@app.get("/judge", include_in_schema=False)
async def serve_judge_demo() -> FileResponse:
    """GRPO (trained) negotiator: same game UI with opponent forced to HF model."""
    return FileResponse(
        "dashboard/judge.html",
        headers={"Cache-Control": "no-cache, must-revalidate"},
    )


@app.get("/interact", include_in_schema=False)
async def serve_interact() -> FileResponse:
    """Direct model inference page — talk to the GRPO model without game scaffolding."""
    return FileResponse(
        "dashboard/interact.html",
        headers={"Cache-Control": "no-cache, must-revalidate"},
    )


@app.get("/favicon.ico", include_in_schema=False, response_model=None)
async def favicon():
    """
    Serve site icon when `dashboard/static/favicon/favicon.ico` exists.
    Otherwise return 204 (place your .ico in that folder — see README.txt there).
    """
    ico = Path("dashboard/static/favicon/favicon.ico")
    if ico.is_file():
        return FileResponse(ico, media_type="image/x-icon")
    return Response(status_code=204)


@app.get("/health")
async def health() -> dict:
    """
    Global health check.

    Returns:
        status:  "ok" when server is running.
        db:      "ok" if parlay.db is reachable, "error" otherwise.
        gemini:  "configured" when GOOGLE_API_KEY is set, "mock" otherwise.
        version: Application version string.
    """
    import os
    import aiosqlite

    db_status = "error"
    try:
        async with aiosqlite.connect("parlay.db") as db:
            await db.execute("SELECT 1")
        db_status = "ok"
    except Exception as exc:
        logger.warning(f"Health check DB probe failed: {exc}")

    gemini_status = "configured" if os.environ.get("GOOGLE_API_KEY", "").strip() else "mock"

    return {
        "status": "ok",
        "db": db_status,
        "gemini": gemini_status,
        "version": "1.0.0",
    }