"""通知渠道配置 API"""
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from app.database import get_db
from app.deps import get_entity_id
from app.models import NotificationChannel, NotificationLog
from app.auth_middleware import require_role, require_auth_401
from datetime import datetime

# ── B2（2026-09-22 dama-workbench-entity-isolation-fullstack-20260922）────────────────
# 本模块两张表在 `models/__init__.py` 均**无 entity_id 列**，按「分表处置」口径落地：
#   · `notification_logs`（Log 类）→ **经父键 join 归属**，零迁移：
#       alert_id → kpi_alerts.id → kpi_alerts.entity_id（GET /logs 已收口）。
#   · `notification_channels`（**配置类，无父键可桥接**）→ 任总 2026-09-22 已批
#       「方案 1（零 DDL）」：**保持全局 = 集团共享配置**（一套 wecom/mail/sms 渠道
#       供全账套复用；预警推送是集团行为，渠道与账套无关）。
#       ⚠️ 因此 `/channels*` 四个端点**有意不按账套过滤**——这是口径，不是漏隔离。
#       若后续需要「账套私有渠道」，须单独立单加 entity_id 列（DDL + 回填 + 唯一键改造）。

# 用户端点：统一要求会话 Bearer 鉴权（cma-api-auth-surface-audit-20260914）
# 缺口：本 router 6 个端点全部无鉴权——无 token 可读写通知渠道（config 内含 webhook
# 地址/令牌等凭据）、可触发渠道测试推送、可读推送日志。收口为 require_auth_401。
router = APIRouter(prefix="/api/cma/notifications", tags=["通知配置"],
                   dependencies=[Depends(require_auth_401)])


def ch_to_dict(c):
    return {
        "id": c.id,
        "name": c.name,
        "channel_type": c.channel_type,
        "config": c.config,
        "enabled": c.enabled,
        "created_at": c.created_at.isoformat() if c.created_at else None,
    }


@router.get("/channels")
def list_channels(db: Session = Depends(get_db)):
    """获取通知渠道列表"""
    channels = db.query(NotificationChannel).order_by(NotificationChannel.id).all()
    return {"data": [ch_to_dict(c) for c in channels]}


@router.post("/channels")
def create_channel(data: dict, db: Session = Depends(get_db)):
    """创建通知渠道"""
    ch = NotificationChannel(
        name=data["name"],
        channel_type=data["channel_type"],
        config=data.get("config", {}),
        enabled=data.get("enabled", True),
    )
    db.add(ch)
    db.commit()
    db.refresh(ch)
    return ch_to_dict(ch)


@router.put("/channels/{ch_id}")
def update_channel(ch_id: int, data: dict, db: Session = Depends(get_db)):
    """更新通知渠道"""
    ch = db.query(NotificationChannel).filter(NotificationChannel.id == ch_id).first()
    if not ch:
        raise HTTPException(404, "渠道不存在")
    # 字段白名单（2026-09-21 mass-assignment 收口）：仅业务字段，其余键忽略
    _updatable = ("name", "config", "enabled")
    for k, v in data.items():
        if k in _updatable:
            setattr(ch, k, v)
    db.commit()
    db.refresh(ch)
    return ch_to_dict(ch)


@router.delete("/channels/{ch_id}")
def delete_channel(ch_id: int, db: Session = Depends(get_db)):
    """删除通知渠道"""
    ch = db.query(NotificationChannel).filter(NotificationChannel.id == ch_id).first()
    if not ch:
        raise HTTPException(404, "渠道不存在")
    db.delete(ch)
    db.commit()
    return {"message": "已删除"}


@router.post("/channels/{ch_id}/test")
def test_channel(ch_id: int, db: Session = Depends(get_db)):
    """测试推送"""
    from app.utils.notifier import push_alert
    ch = db.query(NotificationChannel).filter(NotificationChannel.id == ch_id).first()
    if not ch:
        raise HTTPException(404, "渠道不存在")
    config = ch.config or {}
    test_alert = {
        "alert_level": "yellow",
        "alert_message": "【测试通知】这是一条管理会计OS的测试预警",
        "kpi_name": "销售总额",
        "period": datetime.now().strftime("%Y-%m"),
        "actual_value": "800,000",
        "target_value": "1,000,000",
    }
    results = push_alert(test_alert, [{
        "name": ch.name, "channel_type": ch.channel_type,
        "config": config, "enabled": True
    }])
    return {"results": results}


@router.get("/logs")
def list_logs(page: int = 1,
              entity_id: int = Depends(get_entity_id),
              db: Session = Depends(get_db)):
    """通知历史（**按会话账套收口**，B2 零迁移）

    2026-09-22 dama-workbench-entity-isolation-fullstack-20260922（§四 B2）：
    `notification_logs` 无 entity_id 列 → 经父键 join 归属：
    `notification_logs.alert_id → kpi_alerts.id → kpi_alerts.entity_id`。
    口径与 batch5 对 `KpiDataQualityLog` 的处置一致（宁少勿错）：
    `alert_id IS NULL` 的行无可归属父键 → **不返回**（不暴露给任一账套）。
    """
    from app.models import KPIAlert
    scoped = (db.query(NotificationLog)
              .join(KPIAlert, NotificationLog.alert_id == KPIAlert.id)
              .filter(KPIAlert.entity_id == entity_id))
    total = scoped.count()
    logs = scoped.order_by(
        NotificationLog.created_at.desc()
    ).offset((page - 1) * 20).limit(20).all()
    return {
        "total": total,
        "entity_id": entity_id,
        # 口径字段（2026-09-22 DAMA 回查 §5 收口）：上线后本页在无预警推送的账套会显示 0 条，
        # 属口径而非故障——现有 8 行历史记录全是 `alert_id IS NULL` 的 OKR 复盘提醒（无账套归属），
        # 按「宁少勿错」不返回。前端据此文案提示，避免被当成页面坏了。
        "policy": "alert-linked-only",
        "note": ("仅显示与预警推送关联的记录（按父键 kpi_alerts 归属会话账套）。"
                 "无父键的历史通知（如 OKR 复盘提醒，写入方 backend/scripts/okr_review_reminder.py）"
                 "不属于任何账套，不在本列表返回。口径登记：docs/audit-and-notification-caliber-20260922.md"),
        "data": [{
            "id": l.id,
            "alert_id": l.alert_id,
            "channel": l.channel,
            "recipient": l.recipient,
            "title": l.title,
            "status": l.status,
            "error_msg": l.error_msg,
            "sent_at": l.sent_at.isoformat() if l.sent_at else None,
            "created_at": l.created_at.isoformat() if l.created_at else None,
        } for l in logs]
    }