import { Activity, AlertTriangle, Clock, Cpu, Layers, Settings2, Wifi } from "lucide-react";
import React, { useEffect, useState, useCallback } from "react";
import { Button } from "../ui/button";
import { Switch } from "../ui/switch";
import { Input } from "../ui/input";
import { Badge } from "../ui/badge";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "../ui/select";
import { Label } from "../ui/label";
import {
  inspectionDeviceApi,
  inspectionCatalogApi,
  inspectionExecApi,
  type DeviceCatalog,
  type DeviceExtension,
  type DeviceTierInfo,
  type DeviceTier,
} from "../../infrastructure/inspection/inspectionApi";
import { toast } from "../ui/toast";
import { HostDetailsSection } from "../host-details";

interface HostInspectionSectionProps {
  hostId: string;
  hostLabel: string;
  host: any;
  keys: any[];
}

export function HostInspectionSection({ hostId, hostLabel, host, keys }: HostInspectionSectionProps) {
  const [catalogs, setCatalogs] = useState<DeviceCatalog[]>([]);
  const [tiers, setTiers] = useState<DeviceTierInfo[]>([]);
  const [extension, setExtension] = useState<DeviceExtension | null>(null);
  const [loading, setLoading] = useState(true);
  const [saving, setSaving] = useState(false);

  // 本地编辑状态
  const [enabled, setEnabled] = useState(false);
  const [catalogId, setCatalogId] = useState("");
  const [tier, setTier] = useState<string>("");
  const [customInterval, setCustomInterval] = useState<string>("");

  const loadData = useCallback(async () => {
    setLoading(true);
    try {
      const [catalogList, tierList, ext] = await Promise.all([
        inspectionCatalogApi.list(),
        inspectionCatalogApi.getTiers(),
        inspectionDeviceApi.get(hostId),
      ]);
      const safeCatalogs = Array.isArray(catalogList) ? catalogList : [];
      const safeTiers = Array.isArray(tierList) ? tierList : [];
      setCatalogs(safeCatalogs);
      setTiers(safeTiers);
      setExtension(ext || null);

      if (ext) {
        setEnabled(ext.inspection_enabled);
        setCatalogId(ext.catalog_id);
        setTier(ext.tier || "");
        setCustomInterval(ext.inspection_interval?.toString() || "");
      } else {
        // 默认值
        setCatalogId(safeCatalogs[0]?.id || "linux");
        setTier("access");
      }
    } catch (e: any) {
      console.error("[Inspection] 加载失败:", e);
    } finally {
      setLoading(false);
    }
  }, [hostId]);

  useEffect(() => {
    loadData();
  }, [loadData]);

  const handleSave = async () => {
    if (!catalogId) {
      toast.error("请选择设备类型");
      return;
    }

    setSaving(true);
    try {
      const data: Partial<DeviceExtension> = {
        inspection_enabled: enabled,
        catalog_id: catalogId,
        tier: (tier as DeviceTier) || null,
        inspection_interval: customInterval ? parseInt(customInterval, 10) : null,
        // 存 hostname，用于调度器匹配 vault SSH 配置
        hostname: host?.hostname || null,
      };

      const result = await inspectionDeviceApi.upsert(hostId, data);
      setExtension(result);
      toast.success(enabled ? "巡检已启用" : "巡检已停用");
    } catch (e: any) {
      toast.error("保存失败: " + e.message);
    } finally {
      setSaving(false);
    }
  };

  const handleScanNow = async () => {
    try {
      if (!host || !host.hostname) {
        toast.error("主机配置不完整，无法巡检");
        return;
      }

      // 构造连接配置
      const hostConfig: any = {
        id: host.id || hostId,
        label: hostLabel,
        hostname: host.hostname,
        port: host.port || 22,
        username: host.username,
      };

      // 密码
      if (host.password) {
        hostConfig.password = host.password;
      }

      // 私钥
      if (host.identityFileId && keys && keys.length) {
        const key = keys.find((k) => k.id === host.identityFileId);
        if (key && key.privateKey) {
          hostConfig.privateKeyContent = key.privateKey;
          if (key.passphrase) {
            hostConfig.passphrase = key.passphrase;
          }
        }
      }

      toast.info(`正在对 ${hostLabel} 执行立即巡检...`);
      const result = await inspectionExecApi.runInspection(hostId, hostConfig, catalogId);

      if (result?.success) {
        toast.success(`巡检完成，耗时 ${(result.duration / 1000).toFixed(1)} 秒`);
        if (result.alerts && result.alerts.length > 0) {
          toast.warning(`触发 ${result.alerts.length} 条告警`);
        }
      } else {
        toast.error(`巡检失败: ${result?.error || "未知错误"}`);
      }

      // 刷新扩展信息（更新 last_run_at）
      loadData();
    } catch (e: any) {
      toast.error("巡检触发失败: " + e.message);
    }
  };

  // 计算有效周期
  const selectedTier = tiers.find((t) => t.key === tier);
  const selectedCatalog = catalogs.find((c) => c.id === catalogId);
  const effectiveInterval = customInterval
    ? `${customInterval} 分钟`
    : selectedTier
    ? `${selectedTier.default_interval} 分钟（${selectedTier.label}默认）`
    : "5 分钟（系统默认）";

  return (
    <HostDetailsSection
      icon={<Activity size={16} />}
      title="巡检配置"
      hint={`为 ${hostLabel} 配置自动巡检`}
    >
      {loading ? (
        <div className="text-sm text-muted-foreground">加载中...</div>
      ) : (
        <div className="space-y-4">
          {/* 启用开关 */}
          <div className="flex items-center justify-between">
            <div className="space-y-0.5">
              <div className="text-sm font-medium">启用自动巡检</div>
              <div className="text-xs text-muted-foreground">
                开启后系统将按周期自动巡检该设备
              </div>
            </div>
            <Switch checked={enabled} onCheckedChange={setEnabled} />
          </div>

          {/* 设备类型 */}
          <div className="space-y-2">
            <Label className="text-xs text-muted-foreground">设备类型</Label>
            <Select value={catalogId} onValueChange={setCatalogId}>
              <SelectTrigger>
                <SelectValue placeholder="请选择设备类型" />
              </SelectTrigger>
              <SelectContent>
                {catalogs.map((c) => (
                  <SelectItem key={c.id} value={c.id}>
                    <div className="flex items-center gap-2">
                      <span>{c.name}</span>
                      <span className="text-xs text-muted-foreground">{c.vendor}</span>
                    </div>
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>
            {selectedCatalog && (
              <p className="text-xs text-muted-foreground">{selectedCatalog.description}</p>
            )}
          </div>

          {/* 设备分级 */}
          <div className="space-y-1.5">
            <Label className="text-xs text-muted-foreground">设备分级</Label>
            <div className="flex gap-2">
              {tiers.map((t) => (
                <button
                  key={t.key}
                  onClick={() => setTier(tier === t.key ? "" : t.key)}
                  className={`flex-1 px-3 py-2 rounded-md border text-sm transition-colors ${
                    tier === t.key
                      ? "border-primary bg-primary/10 text-primary"
                      : "border-border hover:border-primary/50"
                  }`}
                >
                  <div className="font-medium">{t.label}</div>
                  <div className="text-xs text-muted-foreground">
                    默认 {t.default_interval} 分钟
                  </div>
                </button>
              ))}
            </div>
            <p className="text-xs text-muted-foreground">
              分级决定默认巡检周期，也可单独设置
            </p>
          </div>

          {/* 自定义周期 */}
          <div className="space-y-2">
            <Label className="text-xs text-muted-foreground">
              自定义巡检周期（分钟，留空则使用默认）
            </Label>
            <Input
              type="number"
              min={1}
              placeholder="留空使用默认值"
              value={customInterval}
              onChange={(e) => setCustomInterval(e.target.value)}
            />
            <p className="text-xs text-muted-foreground">
              有效周期：<span className="font-medium">{effectiveInterval}</span>
            </p>
          </div>

          {/* 上次巡检信息 */}
          {extension?.last_scan_at && (
            <div className="flex items-center gap-2 p-3 bg-secondary/30 rounded-md text-sm">
              <Clock size={14} className="text-muted-foreground" />
              <div>
                <span className="text-muted-foreground">上次巡检：</span>
                <span className="font-medium">
                  {new Date(extension.last_scan_at).toLocaleString()}
                </span>
                <Badge
                  variant={extension.last_scan_status === "success" ? "default" : "destructive"}
                  className="ml-2"
                >
                  {extension.last_scan_status === "success"
                    ? "成功"
                    : extension.last_scan_status === "timeout"
                    ? "超时"
                    : "失败"}
                </Badge>
              </div>
            </div>
          )}

          {/* 操作按钮 */}
          <div className="flex gap-2 pt-2">
            <Button onClick={handleSave} disabled={saving} className="flex-1">
              {saving ? "保存中..." : "保存配置"}
            </Button>
            <Button
              variant="outline"
              onClick={handleScanNow}
              disabled={!enabled}
              className="flex-1"
            >
              <Activity size={14} className="mr-2" />
              立即巡检
            </Button>
          </div>
        </div>
      )}
    </HostDetailsSection>
  );
}