"""App entrypoint."""

import logging

from fastapi import FastAPI, Request
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates
from starlette.exceptions import HTTPException
from starlette.middleware.sessions import SessionMiddleware

from keycloak_collective_portal.config import (
    APP_LOG_LEVEL,
    APP_SECRET_KEY,
    APP_THEME,
    REDIS_DB,
    REDIS_HOST,
    REDIS_PORT,
    STATIC_DIR,
    TEMPLATE_DIR,
)
from keycloak_collective_portal.exceptions import RequiresLoginException
from keycloak_collective_portal.keycloak import init_keycloak
from keycloak_collective_portal.oidc import init_oidc
from keycloak_collective_portal.redis import Redis
from keycloak_collective_portal.routes import (
    health,
    invite,
    oidc,
    register,
    root,
)

log = logging.getLogger("uvicorn")
log.setLevel(APP_LOG_LEVEL)

app = FastAPI(docs_url=None, redoc_url=None)


@app.exception_handler(RequiresLoginException)
async def requires_login(request, exception):
    return RedirectResponse(request.url_for("login"))


@app.exception_handler(HTTPException)
async def http_exception_handler(request, exc):
    home = request.url_for("login")
    return HTMLResponse(f"<p>{exc.detail} (<a href='{home}'>home</a>)</p>")


@app.on_event("startup")
async def startup_event():
    redis = Redis()
    app.state.redis = await redis.create_pool(
        f"redis://{REDIS_HOST}:{REDIS_PORT}/{REDIS_DB}?encoding=utf-8"
    )


@app.on_event("shutdown")
async def shutdown_event():
    await app.state.redis.close()


app.add_middleware(SessionMiddleware, secret_key=APP_SECRET_KEY)

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

app.state.oidc = init_oidc()
log.info("Initialised OpenID Connect client (for Keycloak logins)")

app.state.keycloak = init_keycloak()
log.info("Initialised Keycloak admin client (for Keycloak REST API)")

app.state.templates = Jinja2Templates(directory=TEMPLATE_DIR)
app.state.theme = APP_THEME
app.state.log = log

app.include_router(invite.router)
app.include_router(oidc.router)
app.include_router(register.router)
app.include_router(root.router)
app.include_router(health.router)