from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
import uvicorn
from contextlib import asynccontextmanager

from config.settings import get_settings
from routers import mentors, recommend, health
from services.embedding_service import EmbeddingService

settings = get_settings()

@asynccontextmanager
async def lifespan(app: FastAPI):
    embedding_service = EmbeddingService()
    app.state.embedding_service = embedding_service
    yield
    if hasattr(app.state, 'embedding_service'):
        del app.state.embedding_service

app = FastAPI(
    title="MentorMe AI Recommendation Server",
    description="AI-powered mentor-mentee recommendation using Vietnamese_Embedding and Pinecone",
    version="1.0.0",
    lifespan=lifespan
)

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

app.include_router(health.router, prefix="/api/v1", tags=["Health"])
app.include_router(mentors.router, prefix="/api/v1", tags=["Mentors"])
app.include_router(recommend.router, prefix="/api/v1", tags=["Recommendations"])

@app.get("/")
async def root():
    return {
        "message": "MentorMe AI Recommendation Server",
        "version": "1.0.0",
        "status": "running"
    }

if __name__ == "__main__":
    uvicorn.run(
        "main:app",
        host=settings.HOST,
        port=settings.PORT,
        reload=settings.DEBUG,
        log_level="info"
    )