import { useAsyncData } from "../../lib/useAsyncData";
import {
  adminListChannels,
  adminListIoT,
  adminListMemories,
  adminListPersonas,
  adminListPlugins,
  adminListSessions,
} from "../../lib/api";
import { useAppStore } from "../../store/useAppStore";
import { navigateAdmin, type AdminSectionId } from "../router";
import { CardGrid, StatCard } from "../components";
import { Surface, Tag } from "../../components/primitives";
import { Icon, type IconName } from "../../components/Icon";
import { useAutoReload } from "../hooks";

interface DashCard {
  id: AdminSectionId;
  label: string;
  icon: IconName;
  value: number | string;
  sub?: string;
  tone: "ok" | "warn" | "accent" | "neutral" | "err";
}

export function DashboardModule(): React.ReactNode {
  const personas = useAsyncData(adminListPersonas, []);
  const sessions = useAsyncData(adminListSessions, []);
  const memories = useAsyncData(adminListMemories, []);
  const plugins = useAsyncData(adminListPlugins, []);
  const channels = useAsyncData(adminListChannels, []);
  const iot = useAsyncData(adminListIoT, []);
  useAutoReload(personas.reload, 10000);
  useAutoReload(sessions.reload, 10000);
  useAutoReload(memories.reload, 20000);
  useAutoReload(plugins.reload, 15000);
  useAutoReload(channels.reload, 10000);
  useAutoReload(iot.reload, 8000);

  // WS-backed live signals (design/10 §3): subagents + backthink.
  const agents = useAppStore((s) => s.agents);
  const backthink = useAppStore((s) => s.backthink);
  const wsStatus = useAppStore((s) => s.wsStatus);

  const nPersonas = personas.data?.length ?? 0;
  const nSessions = sessions.data?.length ?? 0;
  const nMemories = memories.data?.length ?? 0;
  const nPlugins = plugins.data?.length ?? 0;
  const nChannels = channels.data?.length ?? 0;
  const nDevices = iot.data?.length ?? 0;
  const offlineChannels = (channels.data ?? []).filter((c) => !c.connected).length;
  const onlineDevices = (iot.data ?? []).filter((d) => d.online).length;
  const runningAgents = agents.filter((a) => a.status === "running").length;

  const cards: DashCard[] = [
    { id: "personas", label: "人格", icon: "dna", value: nPersonas, sub: "启停/默认/路由", tone: "accent" },
    { id: "sessions", label: "活跃会话", icon: "chat", value: nSessions, sub: "渠道 × actor", tone: "ok" },
    { id: "memories", label: "记忆", icon: "memory", value: nMemories, sub: "三类作用域隔离", tone: "accent" },
    { id: "plugins", label: "插件与能力", icon: "plugin", value: nPlugins, sub: "含 MCP/渠道", tone: "neutral" },
    { id: "channels", label: "渠道", icon: "channel", value: `${nChannels - offlineChannels}/${nChannels}`,
      sub: offlineChannels > 0 ? `${offlineChannels} 离线` : "全部在线", tone: offlineChannels > 0 ? "warn" : "ok" },
    { id: "iot", label: "IoT 设备", icon: "device", value: `${onlineDevices}/${nDevices}`,
      sub: onlineDevices === nDevices && nDevices > 0 ? "全部在线" : "设备状态", tone: nDevices > 0 && onlineDevices === nDevices ? "ok" : "neutral" },
    { id: "agents", label: "Agent 运行", icon: "agent", value: runningAgents, sub: `${agents.length} 个已登记`, tone: runningAgents > 0 ? "accent" : "neutral" },
    { id: "backthink", label: "后台思考活跃度", icon: "night", value: backthink.length, sub: "实时 (WS)", tone: backthink.length > 0 ? "warn" : "neutral" },
  ];

  return (
    <div className="space-y-5">
      <div className="flex flex-wrap items-center gap-3">
        <div>
          <h2 className="text-lg font-semibold">仪表盘</h2>
          <p className="text-sm text-[var(--mu-text-lo)]">多而全的概览 · 最详细信息在各独立页面</p>
        </div>
        <div className="ml-auto flex items-center gap-2 text-xs text-[var(--mu-text-lo)]">
          <Tag tone={wsStatus === "connected" ? "ok" : "neutral"}>
            <span className={`mr-1 inline-block h-1.5 w-1.5 rounded-full ${wsStatus === "connected" ? "bg-[var(--mu-ok)]" : "mu-blink"}`} />
            实时通道 · {wsStatus}
          </Tag>
        </div>
      </div>

      <CardGrid>
        {cards.map((c) => (
          <button key={c.id} onClick={() => navigateAdmin(c.id)} className="text-left" title="点击下钻">
            <StatCard icon={<Icon name={c.icon} size={18} />} label={c.label} value={c.value} sub={c.sub} tone={c.tone} />
          </button>
        ))}
      </CardGrid>

      <Surface className="space-y-3">
        <div className="flex items-center gap-2">
          <h3 className="text-sm font-semibold">资源 / LLM / 业务概览</h3>
          <span className="text-xs text-[var(--mu-text-lo)]">占位（后端 M10+ 提供）</span>
        </div>
        <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
          <MiniMetric label="LLM 供应商/模型" value="—" hint="多模态检测 / fallback / 角色路由" />
          <MiniMetric label="存储" value="SQLite" hint="默认；PG/pgvector 可选增强" />
          <MiniMetric label="工具循环上限" value="8 轮" hint="后台声明 / 前台 2s 转后台" />
        </div>
        <div className="pt-2 text-xs text-[var(--mu-text-lo)]">卡片即入口，点击上溯卡片下钻到对应模块。</div>
      </Surface>
    </div>
  );
}

function MiniMetric({ label, value, hint }: { label: string; value: string; hint: string }): React.ReactNode {
  return (
    <div className="rounded-[var(--mu-radius)] border border-[var(--mu-glass-border)] bg-[var(--mu-surface-3)]/60 p-3">
      <div className="text-xs text-[var(--mu-text-lo)]">{label}</div>
      <div className="mt-1 text-lg font-semibold">{value}</div>
      <div className="text-xs text-[var(--mu-text-lo)]">{hint}</div>
    </div>
  );
}