initial commit

backend/app/main.py

@@ -0,0 +1,98 @@
+"""FluentGerman.ai — FastAPI application entry point."""
+
+import logging
+import time
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI, Request
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from sqlalchemy import select
+
+from app.auth import hash_password
+from app.config import get_settings
+from app.database import Base, engine, async_session
+from app.models import User
+from app.routers import auth, chat, instructions, users, voice
+
+# ── Logging ──────────────────────────────────────────────────────────
+import os
+os.makedirs("logs", exist_ok=True)
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+    handlers=[
+        logging.StreamHandler(),
+        logging.FileHandler("logs/app.log", mode="a"),
+    ],
+)
+logger = logging.getLogger("fluentgerman")
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Create tables and bootstrap admin user on startup."""
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+    # Bootstrap admin if not exists
+    settings = get_settings()
+    async with async_session() as db:
+        result = await db.execute(select(User).where(User.is_admin == True))  # noqa: E712
+        if not result.scalar_one_or_none():
+            admin = User(
+                username=settings.admin_username,
+                email=settings.admin_email,
+                hashed_password=hash_password(settings.admin_password),
+                is_admin=True,
+            )
+            db.add(admin)
+            await db.commit()
+            logger.info("Admin user created: %s", settings.admin_username)
+
+    logger.info("FluentGerman.ai started — LLM: %s/%s, Voice: %s",
+                settings.llm_provider, settings.llm_model, settings.voice_mode)
+    yield
+    logger.info("FluentGerman.ai shutting down")
+
+
+app = FastAPI(
+    title="FluentGerman.ai",
+    description="Personalized LLM-powered German language learning platform",
+    version="1.0.0",
+    lifespan=lifespan,
+)
+
+
+# ── Request logging middleware ────────────────────────────────────────
+@app.middleware("http")
+async def log_requests(request: Request, call_next):
+    start = time.time()
+    response = await call_next(request)
+    duration = round((time.time() - start) * 1000)
+    # Skip logging static file requests to keep logs clean
+    path = request.url.path
+    if path.startswith("/api/"):
+        logger.info("%s %s → %s (%dms)", request.method, path, response.status_code, duration)
+    return response
+
+
+# CORS — restrict in production
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# API routers
+app.include_router(auth.router)
+app.include_router(users.router)
+app.include_router(instructions.router)
+app.include_router(chat.router)
+app.include_router(voice.router)
+
+# Serve frontend static files
+app.mount("/", StaticFiles(directory="../frontend", html=True), name="frontend")