import os

from fastapi import FastAPI
from fastapi.responses import RedirectResponse
from fastapi.staticfiles import StaticFiles

from app.config import settings
from app.database import init_db, SessionLocal
from app.models import AdminUser, Profile
from app.routers import auth, public, admin, chat
from app.routers.auth import hash_password

BASE = settings.BASE_PATH  # "" for root deployment, or "/careerbot" for subpath

app = FastAPI(title="CareerBot", description="Personal Career Showcase with AI Assistant")

# Mount static files and uploads under BASE_PATH
app.mount(f"{BASE}/static", StaticFiles(directory="app/static"), name="static")
os.makedirs(settings.UPLOAD_DIR, exist_ok=True)
app.mount(f"{BASE}/uploads", StaticFiles(directory=settings.UPLOAD_DIR), name="uploads")

# When BASE="" and DB is shared with a /careerbot deployment, photo_url values
# stored by the sibling deployment begin with "/careerbot/uploads/...".
# Add a secondary mount so those URLs keep resolving here.
if BASE == "":
    app.mount("/careerbot/uploads", StaticFiles(directory=settings.UPLOAD_DIR), name="uploads_legacy")

# Include routers with BASE_PATH prefix
app.include_router(auth.router, prefix=BASE)
app.include_router(public.router, prefix=BASE)
app.include_router(admin.router, prefix=BASE)
app.include_router(chat.router, prefix=BASE)

# Set Jinja2 template globals for BASE_PATH
admin.templates.env.globals["base"] = BASE
public.templates.env.globals["base"] = BASE


# Root redirect only needed when deployed under a subpath (otherwise "/" is already the app root)
if BASE:
    @app.get("/")
    def root_redirect():
        return RedirectResponse(url=f"{BASE}/", status_code=302)


@app.on_event("startup")
def startup():
    init_db()
    db = SessionLocal()
    try:
        # Ensure admin user exists
        admin_user = db.query(AdminUser).filter(AdminUser.email == "ln0422@gmail.com").first()
        if not admin_user:
            admin_user = AdminUser(
                email="ln0422@gmail.com",
                password_hash=hash_password("qshs123456"),
            )
            db.add(admin_user)
            db.commit()

        # Ensure profile exists
        profile = db.query(Profile).first()
        if not profile:
            db.add(Profile())
            db.commit()
    finally:
        db.close()