import asyncio
from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.core.config import CORS_ORIGINS
from app.core.discord.discord_bot import start_discord_bot
from app.core.discord.scheduler import start_scheduler
from app.core.memory_kb.word_memory import seed_from_history
from app.db.database import SessionLocal, init_db
from app.db.models import Message
from app.api import chat, memory, logs, system


def _seed_word_memory_from_db() -> None:
    db = SessionLocal()
    try:
        rows = (
            db.query(Message.content)
            .filter(Message.role.in_(["user", "assistant"]))
            .order_by(Message.created_at.desc())
            .limit(200)
            .all()
        )
        seed_from_history([content for (content,) in rows])
    finally:
        db.close()


@asynccontextmanager
async def lifespan(app: FastAPI):
    init_db()
    _seed_word_memory_from_db()
    start_scheduler()
    asyncio.create_task(start_discord_bot())
    yield


app = FastAPI(title="PlayChat API", version="0.1.0", lifespan=lifespan)

app.add_middleware(
    CORSMiddleware,
    allow_origins=CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


app.include_router(chat.router)
app.include_router(memory.router)
app.include_router(logs.router)
app.include_router(system.router)


@app.get("/health")
def health():
    return {"status": "ok"}