"""FastAPI app entry: mount routes, static, templates, Sentry."""
from contextlib import asynccontextmanager

import sentry_sdk
from fastapi import FastAPI, Request
from fastapi.responses import RedirectResponse
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates
from pathlib import Path

from app.core.auth import (
    Base as AuthBase,
    RequireLogin,
    auth_backend,
    fastapi_users,
    get_async_engine,
    google_oauth_client,
)
from app.core.config import get_settings
from app.routes import health, invite, events, admin, index, auth


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Create auth tables (auth_user, oauth_account) if they don't exist
    async with get_async_engine().begin() as conn:
        await conn.run_sync(AuthBase.metadata.create_all)
    yield


app = FastAPI(
    title="Slack Data Collector",
    description="Self-hosted Slack onboarding and workspace data sync service",
    lifespan=lifespan,
)

# ── Exception handler: redirect to login when admin access is attempted ────
@app.exception_handler(RequireLogin)
async def require_login_handler(request: Request, exc: RequireLogin):
    return RedirectResponse("/auth/login", status_code=302)


# ── Templates and static ───────────────────────────────────────────────────
BASE_DIR = Path(__file__).resolve().parent
app.state.templates = Jinja2Templates(directory=str(BASE_DIR / "templates"))
app.state.templates.env.globals["site_title"] = get_settings().SITE_TITLE
app.state.templates.env.globals["site_description"] = get_settings().SITE_DESCRIPTION
app.state.templates.env.globals["admin_email"] = get_settings().ADMIN_EMAIL or ""

app.mount("/static", StaticFiles(directory=str(BASE_DIR / "static")), name="static")

# ── Routers ────────────────────────────────────────────────────────────────
settings = get_settings()

app.include_router(health.router, tags=["health"])
app.include_router(invite.router, tags=["invite"])
app.include_router(events.router, tags=["events"])
app.include_router(admin.router, prefix="/admin", tags=["admin"])
app.include_router(auth.router, tags=["auth"])
app.include_router(index.router, tags=["index"])

# Google OAuth routes: GET /auth/authorize  GET /auth/callback
redirect_url = f"{settings.BASE_URL}/auth/callback" if settings.BASE_URL else None
app.include_router(
    fastapi_users.get_oauth_router(
        google_oauth_client,
        auth_backend,
        settings.SESSION_SECRET,
        redirect_url=redirect_url,
        associate_by_email=True,
        is_verified_by_default=True,
    ),
    prefix="/auth",
    tags=["auth"],
)

sentry_sdk.init(dsn=settings.SENTRY_DSN, environment=settings.ENVIRONMENT)