from __future__ import annotations

from typing import NoReturn

from fastapi import APIRouter, HTTPException, Request, Response
from fastapi.responses import HTMLResponse, PlainTextResponse
from starlette.concurrency import run_in_threadpool

from ..ddns_dns import DnsProviderError
from ..ddns_security import client_ip, dashboard_csrf_token, require_dashboard_csrf
from ..dependencies import ServiceDep, SettingsDep, StoreDep
from ..event_statuses import (
    DASHBOARD_HOSTNAME_DELETED,
    DASHBOARD_ROUTER_CREDENTIALS_ROTATED,
    DASHBOARD_UPDATE_URL_ROTATED,
)
from ..web.forms import first_form_value, request_form
from ..web.html_utils import trusted
from ..web.templates import _page
from ..web.templates_management import _render_management_page, _render_management_unlock_page
from . import management_domains, management_passwords
from .management_shared import (
    get_active_management_account,
    get_active_management_account_async,
    has_management_access,
    locked_management_response,
    render_management_page_async,
)

router = APIRouter()
router.include_router(management_passwords.router)
router.include_router(management_domains.router)


@router.get("/m/{management_slug}", response_class=HTMLResponse, include_in_schema=False)
def manage_magic(management_slug: str, request: Request, settings: SettingsDep, store: StoreDep, service: ServiceDep) -> str:
    account = get_active_management_account(store, management_slug)
    csrf_token = dashboard_csrf_token(management_slug, account)
    if not has_management_access(request, management_slug, account):
        return _render_management_unlock_page(management_slug, account, csrf_token)
    return _render_management_page(service, settings, management_slug, account, csrf_token)


@router.post("/m/{management_slug}/rotate", response_class=HTMLResponse, include_in_schema=False)
async def rotate_magic_credentials(
    management_slug: str,
    request: Request,
    settings: SettingsDep,
    store: StoreDep,
    service: ServiceDep,
) -> str:
    account = await get_active_management_account_async(store, management_slug)
    if not has_management_access(request, management_slug, account):
        return locked_management_response(management_slug, account)
    form = await request_form(request, settings)
    require_dashboard_csrf(management_slug, account, first_form_value(form, "csrf"))
    hostname = str(account["hostname"])
    action = first_form_value(form, "action")
    if action == "update":
        rotated = await run_in_threadpool(store.rotate_update_slug, hostname)
        if not rotated:
            return _not_found()
        await run_in_threadpool(
            store.log_update_event,
            hostname,
            None,
            None,
            DASHBOARD_UPDATE_URL_ROTATED,
            "router update URL rotated",
            client_ip(request, settings),
        )
        return await render_management_page_async(
            service,
            settings,
            management_slug,
            rotated,
            dashboard_csrf_token(management_slug, rotated),
            message="Update-URL rotated.",
        )
    if action == "password":
        rotated = await run_in_threadpool(store.rotate_password, hostname)
        if not rotated:
            return _not_found()
        rotated["management_slug"] = management_slug
        await run_in_threadpool(
            store.log_update_event,
            hostname,
            None,
            None,
            DASHBOARD_ROUTER_CREDENTIALS_ROTATED,
            "router credentials rotated",
            client_ip(request, settings),
        )
        return await render_management_page_async(
            service,
            settings,
            management_slug,
            rotated,
            dashboard_csrf_token(management_slug, rotated),
            message="Router credentials rotated. Copy the new password now.",
            created_account=rotated,
        )
    raise _bad_rotation_action()


@router.post("/m/{management_slug}/delete", include_in_schema=False)
async def delete_magic(management_slug: str, request: Request, settings: SettingsDep, store: StoreDep, service: ServiceDep) -> Response:
    account = await get_active_management_account_async(store, management_slug)
    if not has_management_access(request, management_slug, account):
        return HTMLResponse(_render_management_unlock_page(management_slug, account, dashboard_csrf_token(management_slug, account)), status_code=401)
    form = await request_form(request, settings)
    require_dashboard_csrf(management_slug, account, first_form_value(form, "csrf"))
    hostname = str(account["hostname"])
    try:
        await run_in_threadpool(service.delete_account, hostname, "management-link")
    except DnsProviderError:
        return PlainTextResponse("DNS delete failed; hostname was not deleted", status_code=500)
    await run_in_threadpool(
        store.log_update_event,
        hostname,
        None,
        None,
        DASHBOARD_HOSTNAME_DELETED,
        "hostname deleted from dashboard",
        client_ip(request, settings),
    )
    return HTMLResponse(
        _page(
            "DynDNS deleted",
            trusted(
                """
            <main>
              <section class="hero-band compact">
                <div class="container text-center d-grid justify-items-center gap-3">
                  <p class="eyebrow">Deleted</p>
                  <h1>Hostname deleted.</h1>
                  <p class="lead">The update URL no longer works.</p>
                  <a class="btn btn-outline-primary rounded-pill" href="/">Home</a>
                </div>
              </section>
            </main>
            """
            ),
        )
    )


def _not_found() -> NoReturn:
    raise HTTPException(status_code=404, detail="not found")


def _bad_rotation_action() -> NoReturn:
    raise HTTPException(status_code=400, detail="invalid rotation action")