"""analytics - stateless API proxy for Google Analytics (GA4) and Sklik.

Runs behind the AppFactory Caddy reverse proxy at /apps/<app-id>. ROOT_PATH is
injected as an env var; FastAPI's ``root_path`` makes Swagger UI and the OpenAPI
``servers`` use the proxy prefix so "Try it out" hits /apps/<app-id>/... .

The service stores no secrets. Every credential is supplied per request in an
X- header and used only to talk to the upstream API (see AGENTS.md and
``app.credentials``).
"""
import os

from fastapi import FastAPI

from . import config
from .errors import register_exception_handlers
from .logging_config import get_logger
from .routers import ga_admin, ga_data, meta, sklik

logger = get_logger(__name__)

ROOT_PATH = os.getenv("ROOT_PATH", "")

DESCRIPTION = """
Stateless proxy exposing **Google Analytics 4** and **Sklik** (Seznam) APIs.

All credentials are passed per request as `X-` headers (never stored):

* **Google Analytics** — `X-GA-Access-Token` (preferred) or `X-GA-Credentials`
  (base64 service-account JSON). Optional `X-GA-Quota-Project`.
* **Sklik** — `X-Sklik-Token`. Optional `X-Sklik-User-Id` for managed accounts.

See `documentation/` in the repository for details.
""".strip()

app = FastAPI(
    title=config.APP_NAME,
    version=config.APP_VERSION,
    description=DESCRIPTION,
    root_path=ROOT_PATH,
)

register_exception_handlers(app)

app.include_router(meta.router)
app.include_router(ga_data.router)
app.include_router(ga_admin.router)
app.include_router(sklik.router)

logger.info(
    "analytics started (version=%s, root_path=%r)", config.APP_VERSION, ROOT_PATH
)