from __future__ import annotations

import json
import secrets
from pathlib import Path

from ._services_common import (
    _LogFn,
    _detect_mode,
    _ensure_namespace,
    _exists,
    _kubectl,
    _log,
    _manifest_path,
    _prune_named_workload_other_namespaces,
    _to_bool,
    _wait_rollout,
)


def _garage_namespace(namespace: str | None, env: dict | None) -> str:
    service_ns = str((env or {}).get("SERVICE_NAMESPACE") or "").strip()
    if env:
        explicit = str(env.get("GARAGE_NAMESPACE") or "").strip()
        if explicit:
            return service_ns if explicit == "default" and service_ns else explicit

    raw = (namespace or "").strip() or service_ns or str((env or {}).get("NAMESPACE") or "").strip() or "knoe-system"
    if raw == "default":
        return service_ns or "knoe-system"
    return raw


def _manifest_files(project_root: str | Path) -> list[Path]:
    root = Path(project_root)
    return [
        _manifest_path(root, "k8s", "prole", "storageclass-synology-iscsi.yaml"),
        _manifest_path(root, "k8s", "prole", "iscsi-pvs.yaml"),
        _manifest_path(root, "k8s", "prole", "garage-configmap.yaml"),
        _manifest_path(root, "k8s", "prole", "garage-statefulset.yaml"),
        _manifest_path(root, "k8s", "prole", "garage-service.yaml"),
    ]


def _repair_released_garage_pvs(*, env: dict | None = None, log: _LogFn | None = None) -> None:
    listed = _kubectl(
        ["get", "pv", "-l", "synology.storage/role=garage", "-o", "json"],
        env=env,
        timeout=45,
    )
    if listed.returncode != 0 or not listed.stdout.strip():
        return
    try:
        payload = json.loads(listed.stdout)
    except Exception:
        return

    for item in payload.get("items", []):
        meta = item.get("metadata") or {}
        spec = item.get("spec") or {}
        status = item.get("status") or {}
        name = str(meta.get("name") or "").strip()
        phase = str(status.get("phase") or "").strip()
        if not name or phase != "Released":
            continue
        if not spec.get("claimRef"):
            continue
        _log(log, f"[GARAGE] Clearing stale claimRef on PV {name} (phase=Released)")
        _kubectl(
            [
                "patch",
                "pv",
                name,
                "--type=json",
                "-p",
                '[{"op":"remove","path":"/spec/claimRef"}]',
            ],
            env=env,
            timeout=60,
        )


def _ensure_garage_secret(*, namespace: str, env: dict | None = None, log: _LogFn | None = None) -> None:
    secret_name = str((env or {}).get("GARAGE_SECRET_NAME") or "garage-secrets").strip() or "garage-secrets"
    force = _to_bool((env or {}).get("PROLE_GARAGE_FORCE_SECRET"), default=False)
    if not force and _exists("secret", secret_name, namespace, env=env):
        return

    payload = (
        "apiVersion: v1\n"
        "kind: Secret\n"
        "metadata:\n"
        f"  name: {secret_name}\n"
        "type: Opaque\n"
        "stringData:\n"
        f"  rpc_secret: {json.dumps(secrets.token_hex(32))}\n"
        f"  admin_token: {json.dumps(secrets.token_urlsafe(32))}\n"
        f"  metrics_token: {json.dumps(secrets.token_urlsafe(32))}\n"
    )
    _kubectl(
        ["-n", namespace, "apply", "-f", "-"],
        env=env,
        input_text=payload,
        timeout=90,
        check=True,
    )
    _log(log, f"[GARAGE] Ensured secret/{secret_name} in namespace {namespace}")


def initialize(
    *,
    namespace: str | None = None,
    env: dict | None = None,
    project_root: str | Path = ".",
    log: _LogFn | None = None,
    mode: str | None = None,
) -> None:
    update(namespace=namespace, env=env, project_root=project_root, log=log, mode=mode)


def start(
    *,
    namespace: str | None = None,
    env: dict | None = None,
    project_root: str | Path = ".",
    log: _LogFn | None = None,
    mode: str | None = None,
) -> None:
    update(namespace=namespace, env=env, project_root=project_root, log=log, mode=mode)


def update(
    *,
    namespace: str | None = None,
    env: dict | None = None,
    project_root: str | Path = ".",
    log: _LogFn | None = None,
    mode: str | None = None,
) -> None:
    _detect_mode(mode, env)  # mode kept for API parity
    target_ns = _garage_namespace(namespace, env)
    _ensure_namespace(target_ns, env)
    _repair_released_garage_pvs(env=env, log=log)
    _ensure_garage_secret(namespace=target_ns, env=env, log=log)

    _prune_named_workload_other_namespaces(
        kind="statefulset",
        name="garage",
        target_namespace=target_ns,
        label_selector="app=garage",
        env=env,
        log=log,
    )
    _prune_named_workload_other_namespaces(
        kind="service",
        name="garage",
        target_namespace=target_ns,
        label_selector="app=garage",
        env=env,
        log=log,
    )
    _prune_named_workload_other_namespaces(
        kind="configmap",
        name="garage-config",
        target_namespace=target_ns,
        label_selector="app=garage",
        env=env,
        log=log,
    )

    for manifest in _manifest_files(project_root):
        if not manifest.exists():
            continue
        _log(log, f"[GARAGE] Applying {manifest}")
        name = manifest.name
        if name in {"storageclass-synology-iscsi.yaml", "iscsi-pvs.yaml"}:
            _kubectl(["apply", "-f", str(manifest)], env=env, timeout=240, check=True)
        else:
            _kubectl(["-n", target_ns, "apply", "-f", str(manifest)], env=env, timeout=240, check=True)

    if _exists("statefulset", "garage", target_ns, env=env):
        _wait_rollout("statefulset", "garage", target_ns, env=env)


def stop(
    *,
    namespace: str | None = None,
    env: dict | None = None,
    log: _LogFn | None = None,
) -> None:
    target_ns = _garage_namespace(namespace, env)
    if _exists("statefulset", "garage", target_ns, env=env):
        _log(log, f"[GARAGE] Scaling statefulset/garage to 0 in namespace {target_ns}")
        _kubectl(
            ["-n", target_ns, "scale", "statefulset/garage", "--replicas=0"],
            env=env,
            timeout=90,
            check=True,
        )


def restart(
    *,
    namespace: str | None = None,
    env: dict | None = None,
    log: _LogFn | None = None,
) -> None:
    target_ns = _garage_namespace(namespace, env)
    if _exists("statefulset", "garage", target_ns, env=env):
        _log(log, f"[GARAGE] Restarting statefulset/garage in namespace {target_ns}")
        _kubectl(
            ["-n", target_ns, "rollout", "restart", "statefulset/garage"],
            env=env,
            timeout=120,
            check=True,
        )
        _wait_rollout("statefulset", "garage", target_ns, env=env)


def status(
    *,
    namespace: str | None = None,
    env: dict | None = None,
) -> bool:
    target_ns = _garage_namespace(namespace, env)
    sts = _kubectl(
        ["-n", target_ns, "get", "statefulset", "garage", "-o", "jsonpath={.status.readyReplicas}"],
        env=env,
        timeout=20,
    )
    svc = _kubectl(["-n", target_ns, "get", "svc", "garage"], env=env, timeout=20)
    return _to_bool(
        sts.returncode == 0 and (sts.stdout or "0").strip() not in {"", "0"} and svc.returncode == 0
    )