import os
import logging
from dotenv import load_dotenv
import dspy
from pathlib import Path
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from starlette.middleware.sessions import SessionMiddleware

# Load environment from backend/.env BEFORE importing modules that read env
_ENV_PATH = Path(__file__).resolve().parent.parent / ".env"
load_dotenv(dotenv_path=_ENV_PATH, override=False)

logging.basicConfig(
    level=logging.WARNING,  # Changed from INFO to WARNING to reduce logging
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
)

from .core.db import Base, engine
from .routes.health import router as health_router
from .routes.auth import router as auth_router
from .routes.google import router as google_router
from .routes.payment import router as stripe_router
from .routes.export import router as export_router
from .routes.credits import router as credits_router
from .routes.plans import router as plans_router
from .routes.forms import router as forms_router
from .routes.responses import router as responses_router
from .routes.analytics import router as analytics_router
from .routes.users import router as users_router
from .routes.uploads import router as uploads_router

app = FastAPI(title="Backend", version="0.1.0")

default_model = os.getenv("DEFAULT_MODEL", "").lower()
if "anthropic" in default_model:
    provider = "ANTHROPIC"
elif "openai" in default_model:
    provider = "OPENAI"
elif "gemini" in default_model:
    provider = "GEMINI"
else:
    provider = "UNKNOWN"




default_lm = dspy.LM(default_model, max_tokens=3200,api_key=os.getenv(provider+'_API_KEY'), temperature=1, cache=False)

dspy.configure(lm=default_lm)

# CORS middleware - allow frontend to access backend
frontend_url = os.getenv("FRONTEND_URL", "http://localhost:5173")
# Support multiple origins (local dev + production)
allowed_origins = [origin.strip() for origin in frontend_url.split(",") if origin.strip()]
app.add_middleware(
    CORSMiddleware,
    allow_origins=allowed_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Session support for OAuth (Authlib requires request.session)
app.add_middleware(
    SessionMiddleware,
    secret_key=os.getenv("SESSION_SECRET", "change-this-session-secret"),
    same_site="lax",
    https_only=bool(int(os.getenv("SESSION_HTTPS_ONLY", "0"))),
)


from .schemas.auth import LoginRequest

# Optional debug route to verify OAuth env at runtime (masked)
@app.get("/api/auth/debug")
def auth_debug():
    cid = os.getenv("GOOGLE_CLIENT_ID", "")
    rid = os.getenv("GOOGLE_REDIRECT_URI", "")
    return {
        "GOOGLE_CLIENT_ID_present": bool(cid),
        "GOOGLE_CLIENT_ID_prefix": cid[:10] + ("..." if cid else ""),
        "GOOGLE_REDIRECT_URI": rid,
    }


app.include_router(health_router)


# Auth routes
app.include_router(auth_router)

# Payment routes
app.include_router(google_router)
app.include_router(stripe_router)

# Export routes
app.include_router(export_router)

# Credits routes
app.include_router(credits_router)

# Plans routes
app.include_router(plans_router)

# Form routes
app.include_router(forms_router)
app.include_router(responses_router)
app.include_router(analytics_router)
app.include_router(users_router)
app.include_router(uploads_router)

# Initialize DB
if os.getenv("AUTO_MIGRATE", "1") == "1":
    Base.metadata.create_all(bind=engine)
    
    # Initialize default subscription plans
    from .services.plan_service import plan_service
    from .core.db import SessionLocal
    try:
        db = SessionLocal()
        plan_service.initialize_default_plans(db, force=False)
        db.close()
        logging.info("Default subscription plans initialized")
    except Exception as e:
        logging.error(f"Failed to initialize subscription plans: {e}")