"""Routes du dashboard admin -- authentification requise."""

import logging
from datetime import datetime
from pathlib import Path

from fastapi import APIRouter, Request, Form
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.templating import Jinja2Templates

logger = logging.getLogger(__name__)
router = APIRouter()

_templates = Jinja2Templates(
    directory=Path(__file__).parent.parent.parent / "frontend" / "templates"
)


def _is_auth(request: Request) -> bool:
    return request.session.get("authenticated") is True


def _require_auth(request: Request):
    if not _is_auth(request):
        return RedirectResponse(url="/admin/login", status_code=302)
    return None


# -- Auth ----------------------------------------------------------------------

@router.get("/admin/login", response_class=HTMLResponse)
async def login_page(request: Request):
    if _is_auth(request):
        return RedirectResponse(url="/admin", status_code=302)
    return _templates.TemplateResponse(request, "admin/login.html", {"error": None})


@router.post("/admin/login")
async def login(request: Request, password: str = Form(...)):
    cfg = request.app.state.config
    if password == cfg.app.admin_password:
        request.session["authenticated"] = True
        return RedirectResponse(url="/admin", status_code=302)
    return _templates.TemplateResponse(
        request,
        "admin/login.html",
        {"error": "Mot de passe incorrect"},
    )


@router.get("/admin/logout")
async def logout(request: Request):
    request.session.clear()
    return RedirectResponse(url="/admin/login", status_code=302)


# -- Pages admin ---------------------------------------------------------------

@router.get("/admin", response_class=HTMLResponse)
async def admin_dashboard(request: Request):
    redirect = _require_auth(request)
    if redirect:
        return redirect

    sys_svc = request.app.state.system_service
    cfg = request.app.state.config
    led = request.app.state.led_service
    btn = request.app.state.button_service

    stats = sys_svc.get_stats()
    services = sys_svc.get_services_status()

    return _templates.TemplateResponse(request, "admin/dashboard.html", {
        "config": cfg,
        "stats": stats,
        "services": services,
        "led_effect": led.current_effect,
        "relay_state": btn.relay_state if btn else True,
        "print_mode": cfg.print.mode,
    })


@router.get("/admin/gallery", response_class=HTMLResponse)
async def admin_gallery(request: Request):
    redirect = _require_auth(request)
    if redirect:
        return redirect
    cfg = request.app.state.config
    return _templates.TemplateResponse(request, "admin/gallery.html", {
        "config": cfg,
    })


@router.get("/admin/actions", response_class=HTMLResponse)
async def admin_actions(request: Request):
    redirect = _require_auth(request)
    if redirect:
        return redirect
    cfg = request.app.state.config
    return _templates.TemplateResponse(request, "admin/actions.html", {"config": cfg})


@router.get("/admin/settings", response_class=HTMLResponse)
async def admin_settings(request: Request):
    redirect = _require_auth(request)
    if redirect:
        return redirect
    cfg = request.app.state.config
    return _templates.TemplateResponse(request, "admin/settings.html", {
        "config": cfg,
        "button": cfg.button,
    })


@router.get("/admin/events", response_class=HTMLResponse)
async def admin_events(request: Request):
    redirect = _require_auth(request)
    if redirect:
        return redirect
    cfg = request.app.state.config
    return _templates.TemplateResponse(request, "admin/events.html", {"config": cfg})


@router.get("/admin/print", response_class=HTMLResponse)
async def admin_print(request: Request):
    redirect = _require_auth(request)
    if redirect:
        return redirect

    printer_svc = request.app.state.printer_service
    cfg = request.app.state.config

    queue = await printer_svc.get_queue()
    printers = await printer_svc.get_printers_status()

    # Formate les dates pour le template Jinja2
    for q in queue:
        ts = q.get("requested_at")
        q["requested_at_str"] = (
            datetime.fromtimestamp(ts).strftime("%d/%m %H:%M") if ts else "—"
        )

    return _templates.TemplateResponse(request, "admin/print.html", {
        "config": cfg,
        "queue": queue,
        "printers": printers,
    })