playchat/backend/app/main.py

import asyncio
import logging
from contextlib import asynccontextmanager

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

from app.api import auth as auth_api
from app.api import chat, knowledge_base, logs, memory, notes, system
from app.api import models as models_api
from app.api import settings as settings_api
from app.core import settings_store
from app.core.config import CORS_ORIGINS, LOG_LEVEL
from app.core.site_auth import require_site_session
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, ModelPreset

# uvicorn は自分のロガーしか設定しないため、アプリ側の logging.getLogger(__name__) は
# 何もしないと logging.lastResort 送りになる。それだと WARNING 未満が消えるうえ、
# 出力にレベルもタイムスタンプもロガー名も付かず、ログから障害を追えない。
logging.basicConfig(
    level=LOG_LEVEL,
    format="%(asctime)s %(levelname)-8s %(name)s: %(message)s",
)
# LiteLLM は自前のハンドラを持つので、root にも流すと同じ行が二重に出る。
logging.getLogger("LiteLLM").propagate = False

# ModelSelector.vue に元々ハードコードされていたプリセット。初回起動時のみDBへシードする。
_DEFAULT_MODEL_PRESETS = [
    ("GPT-5.5", "gpt-5.5"),
    ("GPT-5.4", "gpt-5.4"),
    ("GPT-5.4 mini", "gpt-5.4-mini"),
    ("Claude Sonnet 4.6", "claude-sonnet-4-6"),
    ("Claude Haiku 4.5", "claude-haiku-4-5-20251001"),
    ("Ollama llama3", "ollama/llama3"),
    ("Ollama Gemma4", "ollama/gemma4"),
    ("Gemma 4 12B (llama-server)", "gpt-3.5-turbo"),
    ("Claude Sonnet 4.6 (Bedrock)", "bedrock/jp.anthropic.claude-sonnet-4-6"),
    ("Llama 3 70B (Bedrock)", "bedrock/meta.llama3-70b-instruct-v1:0"),
    ("Nova 2 Lite (Bedrock)", "bedrock/jp.amazon.nova-2-lite-v1:0"),
]


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()


def _load_settings_into_env() -> None:
    db = SessionLocal()
    try:
        settings_store.load_into_env(db)
    finally:
        db.close()


def _seed_default_models() -> None:
    db = SessionLocal()
    try:
        if db.query(ModelPreset).first() is not None:
            return
        for label, value in _DEFAULT_MODEL_PRESETS:
            db.add(ModelPreset(label=label, value=value))
        db.commit()
    finally:
        db.close()


@asynccontextmanager
async def lifespan(app: FastAPI):
    init_db()
    _load_settings_into_env()
    _seed_default_models()
    _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(auth_api.router)
app.include_router(chat.router, dependencies=[Depends(require_site_session)])
app.include_router(memory.router, dependencies=[Depends(require_site_session)])
app.include_router(notes.router, dependencies=[Depends(require_site_session)])
app.include_router(knowledge_base.router, dependencies=[Depends(require_site_session)])
app.include_router(logs.router, dependencies=[Depends(require_site_session)])
app.include_router(system.router, dependencies=[Depends(require_site_session)])
app.include_router(settings_api.router, dependencies=[Depends(require_site_session)])
app.include_router(models_api.router, dependencies=[Depends(require_site_session)])


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