"""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_dashboard_service_from_db`` 装配轻量级 dashboard_service，
经 ``DashboardServicePort`` 端口调用用例（纯只读聚合，无需完整 use_cases 容器）。

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 typing import Any, Literal

from fastapi import APIRouter, Depends, Query
from pydantic import BaseModel
from yuxi.external_systems.use_cases.dto.dashboard import (
    ActivitiesStatsOutput,
    AlertsStatsOutput,
    ExecutionsStatsOutput,
    GetActivitiesStatsInput,
    GetAlertsStatsInput,
    GetExecutionsStatsInput,
    GetHealthStatsInput,
    GetOverviewInput,
    GetQuotasStatsInput,
    GetSystemsStatsInput,
    GetTodosStatsInput,
    HealthStatsOutput,
    OverviewOutput,
    QuotasStatsOutput,
    SystemsStatsOutput,
    TodosStatsOutput,
)
from yuxi.external_systems.use_cases.ports import DashboardServicePort
from yuxi.storage.postgres.models_business import User

from server.routers.external_systems import get_dashboard_service, parse_and_naive, validate_time_range
from server.utils.auth_middleware import get_required_user

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


# ---------------- Response Helpers ----------------


def _build_response(output: BaseModel) -> dict[str, Any]:
    """构建统一成功响应，使用 JSON 模式序列化确保日期/枚举值可安全输出。"""
    return {"success": True, "data": output.model_dump(mode="json")}


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


@dashboard_router.get("/overview", response_model=dict)
async def get_overview(
    start_time: str | None = Query(None, description="执行统计起始时间（ISO 8601）"),
    end_time: str | None = Query(None, description="执行统计结束时间（ISO 8601）"),
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    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。"""
    start_dt = parse_and_naive("start_time", start_time)
    end_dt = parse_and_naive("end_time", end_time)
    validate_time_range(start_dt, end_dt)
    input_dto = GetOverviewInput(
        start=start_dt,
        end=end_dt,
    )
    output: OverviewOutput = await dashboard_service.get_overview(input_dto)
    return _build_response(output)


@dashboard_router.get("/systems", response_model=dict)
async def get_systems_stats(
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    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。"""
    input_dto = GetSystemsStatsInput()
    output: SystemsStatsOutput = await dashboard_service.get_systems_stats(input_dto)
    return _build_response(output)


@dashboard_router.get("/executions", response_model=dict)
async def get_executions_stats(
    start_time: str | None = Query(None, description="执行统计起始时间（ISO 8601）"),
    end_time: str | None = Query(None, description="执行统计结束时间（ISO 8601）"),
    tool_limit: int = Query(20, ge=1, le=100, description="Top 工具数量"),
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """执行维度统计。含按状态/工具分组。"""
    start_dt = parse_and_naive("start_time", start_time)
    end_dt = parse_and_naive("end_time", end_time)
    validate_time_range(start_dt, end_dt)
    input_dto = GetExecutionsStatsInput(
        start=start_dt,
        end=end_dt,
        tool_limit=tool_limit,
    )
    output: ExecutionsStatsOutput = await dashboard_service.get_executions_stats(input_dto)
    return _build_response(output)


@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"),
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    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。"""
    input_dto = GetAlertsStatsInput(
        severity_status=severity_status,
        top_limit=top_limit,
    )
    output: AlertsStatsOutput = await dashboard_service.get_alerts_stats(input_dto)
    return _build_response(output)


@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"),
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    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。"""
    input_dto = GetQuotasStatsInput(
        warning_limit=warning_limit,
        critical_limit=critical_limit,
    )
    output: QuotasStatsOutput = await dashboard_service.get_quotas_stats(input_dto)
    return _build_response(output)


@dashboard_router.get("/health", response_model=dict)
async def get_health_stats(
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """健康维度统计。含按健康状态分组。"""
    input_dto = GetHealthStatsInput()
    output: HealthStatsOutput = await dashboard_service.get_health_stats(input_dto)
    return _build_response(output)


@dashboard_router.get("/activities", response_model=dict)
async def get_activities_stats(
    start_time: str | None = Query(None, description="活动统计起始时间（ISO 8601）"),
    end_time: str | None = Query(None, description="活动统计结束时间（ISO 8601）"),
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """活动维度统计。含按操作类型分组。"""
    start_dt = parse_and_naive("start_time", start_time)
    end_dt = parse_and_naive("end_time", end_time)
    validate_time_range(start_dt, end_dt)
    input_dto = GetActivitiesStatsInput(
        start=start_dt,
        end=end_dt,
    )
    output: ActivitiesStatsOutput = await dashboard_service.get_activities_stats(input_dto)
    return _build_response(output)


@dashboard_router.get("/todos", response_model=dict)
async def get_todos_stats(
    expiring_token_days: int = Query(
        7,
        ge=1,
        le=90,
        description="Token 即将过期阈值（天）",
    ),
    dashboard_service: DashboardServicePort = Depends(get_dashboard_service),
    current_user: User = Depends(get_required_user),
) -> dict[str, Any]:
    """待办统计。跨子域聚合影响导航健康灯/角标的关键计数。"""
    input_dto = GetTodosStatsInput(expiring_token_days=expiring_token_days)
    output: TodosStatsOutput = await dashboard_service.get_todos_stats(input_dto)
    return _build_response(output)