"""Dashboard 子域 Router。

外部系统限界上下文的监控仪表板 API，覆盖全局总览 / 系统维度 /
执行维度 / 告警维度 / 配额维度 / 健康维度 / 活动维度的跨子域聚合统计。
所有端点通过 ``create_use_cases_from_db`` 装配 use_cases，
经 ``dashboard_service`` 端口调用用例。

路径顺序约束：本 router 所有端点均为静态路径（无动态路径参数），无路由匹配歧义。
端点按业务维度组织（总览 → 系统 → 执行 → 告警 → 配额 → 健康 → 活动），
与上文子域覆盖顺序保持一致。

认证策略：
- 所有端点均为只读查询，使用 get_required_user（支持 JWT + API Key 双模认证）
"""

from __future__ import annotations

from datetime import datetime
from typing import Any, Literal

from fastapi import APIRouter, Depends, Query
from sqlalchemy.ext.asyncio import AsyncSession
from yuxi.external_systems.infrastructure.container import create_dashboard_service_from_db
from yuxi.external_systems.use_cases.dto.dashboard import (
    GetActivitiesStatsInput,
    GetAlertsStatsInput,
    GetExecutionsStatsInput,
    GetHealthStatsInput,
    GetOverviewInput,
    GetQuotasStatsInput,
    GetSystemsStatsInput,
)
from yuxi.storage.postgres.models_business import User

from server.utils.auth_middleware import get_db, get_required_user

dashboard_router = APIRouter(prefix="/dashboard", tags=["external-systems-dashboard"])


# ---------------- Endpoints ----------------


@dashboard_router.get("/overview", response_model=dict)
async def get_overview(
    start_time: datetime | None = Query(None, description="执行统计起始时间"),
    end_time: datetime | None = Query(None, description="执行统计结束时间"),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """全局总览。聚合 5 个子域的关键指标。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetOverviewInput(start=start_time, end=end_time)
    output = await dashboard_service.get_overview(input_dto)
    return {"success": True, "data": output.model_dump()}


@dashboard_router.get("/systems", response_model=dict)
async def get_systems_stats(
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """系统维度统计。含启用状态/适配器类型/分类分组 + 熔断器状态。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetSystemsStatsInput()
    output = await dashboard_service.get_systems_stats(input_dto)
    return {"success": True, "data": output.model_dump()}


@dashboard_router.get("/executions", response_model=dict)
async def get_executions_stats(
    start_time: datetime | None = Query(None, description="执行统计起始时间"),
    end_time: datetime | None = Query(None, description="执行统计结束时间"),
    tool_limit: int = Query(20, ge=1, le=100, description="Top 工具数量"),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """执行维度统计。含按状态/工具分组。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetExecutionsStatsInput(
        start=start_time,
        end=end_time,
        tool_limit=tool_limit,
    )
    output = await dashboard_service.get_executions_stats(input_dto)
    return {"success": True, "data": output.model_dump()}


@dashboard_router.get("/alerts", response_model=dict)
async def get_alerts_stats(
    severity_status: Literal["firing", "acknowledged", "resolved", "suppressed"] = Query(
        "firing",
        description="count_by_severity 的状态过滤，告警状态：firing/acknowledged/resolved/suppressed",
    ),
    top_limit: int = Query(10, ge=1, le=50, description="Top 告警去重键数量"),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """告警维度统计。含按状态/严重程度分组 + Top 告警去重键。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetAlertsStatsInput(
        severity_status=severity_status,
        top_limit=top_limit,
    )
    output = await dashboard_service.get_alerts_stats(input_dto)
    return {"success": True, "data": output.model_dump()}


@dashboard_router.get("/quotas", response_model=dict)
async def get_quotas_stats(
    warning_limit: int = Query(20, ge=1, le=100, description="预警配额明细数量"),
    critical_limit: int = Query(20, ge=1, le=100, description="临界配额明细数量"),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """配额维度统计。含按窗口分组 + 预警/临界配额明细。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetQuotasStatsInput(
        warning_limit=warning_limit,
        critical_limit=critical_limit,
    )
    output = await dashboard_service.get_quotas_stats(input_dto)
    return {"success": True, "data": output.model_dump()}


@dashboard_router.get("/health", response_model=dict)
async def get_health_stats(
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """健康维度统计。含按健康状态分组。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetHealthStatsInput()
    output = await dashboard_service.get_health_stats(input_dto)
    return {"success": True, "data": output.model_dump()}


@dashboard_router.get("/activities", response_model=dict)
async def get_activities_stats(
    start_time: datetime | None = Query(None, description="活动统计起始时间"),
    end_time: datetime | None = Query(None, description="活动统计结束时间"),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """活动维度统计。含按操作类型分组。"""
    dashboard_service = create_dashboard_service_from_db(db)
    input_dto = GetActivitiesStatsInput(start=start_time, end=end_time)
    output = await dashboard_service.get_activities_stats(input_dto)
    return {"success": True, "data": output.model_dump()}