import html
from urllib.parse import quote

from fastapi import APIRouter, Depends, Form, HTTPException
from fastapi.responses import RedirectResponse

from app.auth import require_user
from app.db.audit import log_audit_event
from app.db.jobs import create_job

router = APIRouter()

# Samostatná stránka "Runtime Management" byla odstraněna – překrývala se s Environment, odkud se
# tyto redeploy akce spouští. Zůstává jen backend: render_action_buttons() + akční endpoint, které
# používá stránka Environment (app/routes/environment.py).
#
# Portál NEMÁ vlastní deploy logiku. Všechny provozní akce deleguje do existujících shell skriptů
# v appfactory-tools přes existující job systém (job_type="run_script").
# POZOR: předáváme HOLÝ název skriptu bez cesty – adresář scripts/ si doplní Worker sám. Cokoli
# s cestou ("scripts/...") Worker odmítne hláškou "Invalid script name" (viz config.py a
# is_allowed_worker_script). Stejné pravidlo hlídá i allowlist ALLOWED_WORKER_SCRIPTS.
DEPLOY_CORE_SCRIPT = "deploy-core-service.sh"
CADDY_SCRIPT = "generate-caddyfile.sh"
ENABLED_APPS_SCRIPT = "redeploy-enabled-apps.sh"

ALL_CORE_KEY = "redeploy-all-core"
ALL_CORE_LABEL = "Redeploy All Core Services"
ALL_CORE_ICON = "fa-server"

# Cílová stránka pro návrat po akci (dříve Runtime Management, nyní Environment).
DEFAULT_ACTION_NEXT = "/portal/admin/environment"

# Core služby nasazované přes deploy-core-service.sh <service>. (key, name, icon, service_arg)
CORE_SERVICES = [
    ("redeploy-portal", "Portal", "fa-window-maximize", "appfactory-portal"),
    ("redeploy-worker", "Worker", "fa-gears", "appfactory-worker"),
    ("redeploy-webhook", "Webhook", "fa-bolt", "appfactory-webhook"),
    ("redeploy-monitor", "Monitor", "fa-heart-pulse", "appfactory-monitor"),
    ("redeploy-gateway", "Gateway (Caddy)", "fa-shield-halved", "appfactory-caddy"),
    ("redeploy-gitea", "Gitea", "fa-code-branch", "appfactory-gitea"),
    ("redeploy-registry", "Registry", "fa-box-archive", "appfactory-registry"),
]

# Spustitelné akce: key -> (label, icon, script_name, args). ALL_CORE_KEY je speciální (smyčka přes core).
ACTION_MAP: dict[str, tuple[str, str, str, list[str]]] = {}
for _key, _name, _icon, _arg in CORE_SERVICES:
    ACTION_MAP[_key] = (f"Redeploy {_name}", _icon, DEPLOY_CORE_SCRIPT, [_arg])
ACTION_MAP["regenerate-caddy"] = ("Regenerate Caddy", "fa-shield-halved", CADDY_SCRIPT, [])
ACTION_MAP["redeploy-enabled-apps"] = ("Redeploy Enabled Apps", "fa-rocket", ENABLED_APPS_SCRIPT, [])

# Pořadí tlačítek po uložení .env (Environment stránka) – dle zadání.
ENV_ACTION_KEYS = [
    "regenerate-caddy",
    "redeploy-portal",
    "redeploy-worker",
    "redeploy-webhook",
    "redeploy-monitor",
    "redeploy-gateway",
    "redeploy-gitea",
    "redeploy-registry",
    ALL_CORE_KEY,
]


def require_admin(user: dict) -> None:
    if (user.get("role") or "").lower() != "admin":
        raise HTTPException(status_code=403, detail="Runtime akce jsou dostupné pouze administrátorům")


def _is_valid_action(action_key: str) -> bool:
    return action_key == ALL_CORE_KEY or action_key in ACTION_MAP


def _button_meta(action_key: str) -> tuple[str, str]:
    if action_key == ALL_CORE_KEY:
        return ALL_CORE_LABEL, ALL_CORE_ICON
    label, icon, _script, _args = ACTION_MAP[action_key]
    return label, icon


def enqueue_script_job(script_name: str, args: list[str], user: dict, target_label: str) -> int:
    """Vytvoří run_script job do existující fronty (worker spustí scripts/<script_name> s args)
    a zaaudituje akci (bez hodnot proměnných). Vrací job_id."""
    args = list(args or [])
    payload = {"script_name": script_name}
    if args:
        payload["args"] = args
        payload["arguments"] = args
    job_id = create_job(
        job_type="run_script",
        target_type="maintenance_script",
        target_id=script_name,
        payload=payload,
        user=user,
        source="portal_runtime",
    )
    log_audit_event(
        user,
        action="runtime.action",
        target_type="runtime",
        target_id=target_label,
        metadata={"script_name": script_name, "args": args, "job_id": job_id},
    )
    return job_id


def run_action(action_key: str, user: dict) -> str:
    """Spustí runtime akci podle klíče. Vrací zprávu pro uživatele."""
    if action_key == ALL_CORE_KEY:
        job_ids = [enqueue_script_job(DEPLOY_CORE_SCRIPT, [arg], user, arg) for _k, _n, _i, arg in CORE_SERVICES]
        return f"Redeploy všech core služeb byl zařazen do fronty ({len(job_ids)} úloh)."
    label, _icon, script, args = ACTION_MAP[action_key]
    job_id = enqueue_script_job(script, args, user, label)
    return f"Akce {label} byla zařazena do fronty (úloha #{job_id})."


def render_action_buttons(keys: list[str], next_url: str) -> str:
    next_html = html.escape(next_url, quote=True)
    buttons = ""
    for key in keys:
        label, icon = _button_meta(key)
        buttons += f"""
        <form method="post" action="/portal/admin/runtime/action/{key}" class="inline-form"
              onsubmit="return confirm('Spustit akci {html.escape(label)}?');">
            <input type="hidden" name="next" value="{next_html}">
            <button type="submit"><i class="fa-solid {icon}" aria-hidden="true"></i> {html.escape(label)}</button>
        </form>
        """
    return buttons


@router.post("/admin/runtime/action/{action_key}")
def runtime_action(action_key: str, next: str = Form(DEFAULT_ACTION_NEXT), user=Depends(require_user)):
    require_admin(user)
    if not _is_valid_action(action_key):
        raise HTTPException(status_code=404, detail="Neznámá akce")

    message = run_action(action_key, user)
    redirect_to = next if next.startswith("/portal/admin/") else DEFAULT_ACTION_NEXT
    return RedirectResponse(url=f"{redirect_to}?message=" + quote(message), status_code=303)