"""通知 / Webhook 管理接口（系统级设置，全部 admin_required）。

配置读写统一走 `core/notifier`（它落 `app_meta.notify_webhooks` 一个键）——本模块
只做"取配置 → 改一处 → 存回去"的编排，**校验与持久化都在 notifier 里**，不在 web 层
重复实现（避免两份规则漂移）。

安全口径：
- URL 里有凭据（企微 `?key=`）→ 回显一律 `notifier.mask_url()`；
- 前端"留空不修改"：提交上来的 url 若是打码值或空，`save_config` 会保留原值；
- `secret` 永不回显，只回 `secret_set`。
"""
import uuid

from flask import Blueprint, jsonify, request
from flask_login import current_user

from core import notify_events, notifier
from core.logger import get_logger
from web.auth import admin_required

_log = get_logger("web.notify")
bp = Blueprint("notify", __name__)


def _operator():
    try:
        return current_user.username or "admin"
    except Exception:
        return "admin"


def _formats():
    """可用格式（含未实现的，前端据此置灰）。"""
    out = []
    for name, cls in notifier.ADAPTERS.items():
        out.append({"name": name, "label": cls.label, "implemented": True,
                    "byte_limit": cls.byte_limit, "limit_default": cls.limit_default})
    for name, label in notifier.PLANNED_FORMATS.items():
        out.append({"name": name, "label": label + "（未实现）", "implemented": False,
                    "byte_limit": 0, "limit_default": 20})
    return out


@bp.route("/api/notify/webhooks")
@admin_required
def api_notify_webhooks():
    """全部 webhook 配置（url 打码、secret 只回是否配置过）+ 格式清单 + 事件目录。"""
    cfg = notifier.get_public_config()
    return jsonify({"ok": True, "webhooks": cfg["webhooks"], "settings": cfg["settings"],
                    "formats": _formats(), "meta_key": notifier.META_KEY,
                    "max_hooks": notifier.MAX_HOOKS,
                    "planned": list(notifier.PLANNED_FORMATS)})


@bp.route("/api/notify/webhooks", methods=["POST"])
@admin_required
def api_notify_webhook_create():
    """新建一条 webhook。body 即该条配置（见 doc/NOTIFY.md 的字段表）。"""
    data = request.json or {}
    cfg = notifier.get_config()
    if len(cfg["webhooks"]) >= notifier.MAX_HOOKS:
        return jsonify({"ok": False, "error": f"最多 {notifier.MAX_HOOKS} 条"}), 400
    new_id = "wh_" + uuid.uuid4().hex[:8]
    hook = dict(data)
    hook["id"] = new_id
    cfg["webhooks"].append(hook)
    ok, msg = notifier.save_config(cfg)
    if not ok:
        return jsonify({"ok": False, "error": msg, "errors": msg
                        if isinstance(msg, list) else None}), 400
    _log.info("新增通知 webhook: %s（%s）by %s", hook.get("name"), new_id, _operator())
    return jsonify({"ok": True, "msg": "已创建", "id": new_id})


@bp.route("/api/notify/webhooks/<hook_id>", methods=["PUT"])
@admin_required
def api_notify_webhook_update(hook_id):
    """更新一条（部分字段；url/secret 省略或为打码值时保持原值）。"""
    data = request.json or {}
    cfg = notifier.get_config()
    target = next((h for h in cfg["webhooks"] if h["id"] == hook_id), None)
    if not target:
        return jsonify({"ok": False, "error": "webhook 不存在"}), 404
    for k, v in data.items():
        if k in ("id", "created_at"):
            continue
        target[k] = v
    ok, msg = notifier.save_config(cfg)
    if not ok:
        return jsonify({"ok": False, "error": msg, "errors": msg
                        if isinstance(msg, list) else None}), 400
    _log.info("更新通知 webhook: %s by %s", hook_id, _operator())
    return jsonify({"ok": True, "msg": "已保存"})


@bp.route("/api/notify/webhooks/<hook_id>", methods=["DELETE"])
@admin_required
def api_notify_webhook_delete(hook_id):
    cfg = notifier.get_config()
    before = len(cfg["webhooks"])
    cfg["webhooks"] = [h for h in cfg["webhooks"] if h["id"] != hook_id]
    if len(cfg["webhooks"]) == before:
        return jsonify({"ok": False, "error": "webhook 不存在"}), 404
    ok, msg = notifier.save_config(cfg)
    if not ok:
        return jsonify({"ok": False, "error": msg}), 400
    _log.info("删除通知 webhook: %s by %s", hook_id, _operator())
    return jsonify({"ok": True, "msg": "已删除"})


@bp.route("/api/notify/webhooks/<hook_id>/test", methods=["POST"])
@admin_required
def api_notify_webhook_test(hook_id):
    """同步发一条测试消息（用户等结果），返回真实 HTTP 状态与平台错误码。

    ⚠ 不占业务令牌桶：否则管理员点两下测试就把业务通知的配额吃掉了。
    """
    cfg = notifier.get_config()
    hook = next((h for h in cfg["webhooks"] if h["id"] == hook_id), None)
    if not hook:
        return jsonify({"ok": False, "error": "webhook 不存在"}), 404
    event = ((request.json or {}).get("event") or "notify.test").strip()
    rec = notifier.send_test(hook, event=event, operator=_operator())
    return jsonify({"ok": bool(rec.get("ok")),
                    "msg": "测试消息已发出" if rec.get("ok") else "发送失败",
                    "http_status": rec.get("http_status"),
                    "errcode": rec.get("errcode"),
                    "elapsed_ms": rec.get("elapsed_ms"),
                    "attempts": rec.get("attempts"),
                    "error": rec.get("error") or "",
                    "url": notifier.mask_url(hook.get("url", ""))})


@bp.route("/api/notify/preview", methods=["POST"])
@admin_required
def api_notify_preview():
    """保存前预览：真实请求体 + UTF-8 字节数 + 是否会被截断。"""
    data = request.json or {}
    hook = data.get("hook") or {}
    # 预览时 URL 可能还没填：给个占位，只关心渲染结果
    hook = dict(hook)
    hook.setdefault("url", "https://example.invalid/hook")
    out = notifier.preview(hook, event=(data.get("event") or "notify.test"))
    return jsonify({"ok": not out.get("error"), **out})


@bp.route("/api/notify/events")
@admin_required
def api_notify_events():
    """事件目录（前端画勾选树 / 模板占位符速查）。"""
    rows = notify_events.list_events()
    cats = []
    for e in rows:
        if e["category"] not in cats:
            cats.append(e["category"])
    return jsonify({"ok": True, "events": rows, "categories": cats})


@bp.route("/api/notify/logs")
@admin_required
def api_notify_logs():
    """最近发送记录（内存环形缓冲，重启清空；历史见 logs/notify.log）。"""
    limit = request.args.get("limit", 50)
    try:
        limit = max(1, min(int(limit), 200))
    except (TypeError, ValueError):
        limit = 50
    return jsonify({"ok": True, "logs": notifier.get_logs(limit),
                    "note": "仅显示本次运行期间记录；历史见 logs/notify.log"})


@bp.route("/api/notify/settings", methods=["POST"])
@admin_required
def api_notify_settings():
    """全局设置：global_enabled / default_agg_window / default_rate_limit / log_keep。"""
    data = request.json or {}
    cfg = notifier.get_config()
    for k in ("global_enabled", "default_agg_window", "default_rate_limit",
              "log_keep", "http_timeout"):
        if k in data and data[k] is not None:
            cfg["settings"][k] = data[k]
    ok, msg = notifier.save_config(cfg)
    if not ok:
        return jsonify({"ok": False, "error": msg}), 400
    _log.info("更新通知全局设置 by %s: %s", _operator(), data)
    return jsonify({"ok": True, "msg": "已保存"})