import { useState, useEffect, useCallback } from 'react';
import { Plus, Pencil, Trash2, RefreshCw, Cpu } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Badge } from '@/components/ui/badge';
import { PageShell } from '@/components/layout/PageShell';
import { ContentPanel } from '@/components/layout/ContentPanel';
import { PageEmpty } from '@/components/layout/PageEmpty';


import { Label } from '@/components/ui/label';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { toast } from 'sonner';
import { useConfirm } from '@/components/ui/confirm-dialog';
import { buildNodeApi, serverApi, type BuildNode } from '@/api';
import i18n from '@/i18n';

interface ServerItem {
  id: number;
  hostname: string;
  ip: string;
}

// 构建节点管理（Jenkins Agent 风格 SSH 节点） // Logan.Li
export default function BuildNodesManager({ embedded = false }: { embedded?: boolean }) {
  const confirm = useConfirm();
  const [nodes, setNodes] = useState<BuildNode[]>([]);
  const [master, setMaster] = useState({ name: 'Master', max_executors: 2, running_count: 0 });
  const [servers, setServers] = useState<ServerItem[]>([]);
  const [loading, setLoading] = useState(false);
  const [dialogOpen, setDialogOpen] = useState(false);
  const [editNode, setEditNode] = useState<BuildNode | null>(null);
  const [testingId, setTestingId] = useState<number | null>(null);
  const [masterMax, setMasterMax] = useState('2');
  const [savingMaster, setSavingMaster] = useState(false);

  const [name, setName] = useState('');
  const [description, setDescription] = useState('');
  const [serverId, setServerId] = useState('');
  const [labels, setLabels] = useState('');
  const [maxExecutors, setMaxExecutors] = useState('2');
  const [workspacePath, setWorkspacePath] = useState('/data/aiops-workspace');
  const [submitting, setSubmitting] = useState(false);

  const load = useCallback(async () => {
    setLoading(true);
    try {
      const [nodeRes, srvRes] = await Promise.all([
        buildNodeApi.list(),
        serverApi.getServers({ page_size: 200 }).catch(() => ({ list: [] })),
      ]);
      const data = nodeRes as { list?: BuildNode[]; master?: typeof master };
      setNodes(Array.isArray(data?.list) ? data.list : []);
      if (data?.master) {
        setMaster(data.master);
        setMasterMax(String(data.master.max_executors || 2));
      }
      const srvList = (srvRes as { list?: ServerItem[] })?.list || [];
      setServers(srvList);
    } catch {
      toast.error(i18n.t('deploy.buildNodes.loadFailed'));
    } finally {
      setLoading(false);
    }
  }, []);

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

  const openCreate = () => {
    setEditNode(null);
    setName('');
    setDescription('');
    setServerId('');
    setLabels('');
    setMaxExecutors('2');
    setWorkspacePath('/data/aiops-workspace');
    setDialogOpen(true);
  };

  const openEdit = (node: BuildNode) => {
    setEditNode(node);
    setName(node.name);
    setDescription(node.description || '');
    setServerId(String(node.server_id));
    setLabels(node.labels || '');
    setMaxExecutors(String(node.max_executors || 2));
    setWorkspacePath(node.workspace_path || '/data/aiops-workspace');
    setDialogOpen(true);
  };

  const handleSubmit = async () => {
    if (!name.trim() || !serverId) {
      toast.error(i18n.t('deploy.buildNodes.loadFailed'));
      return;
    }
    setSubmitting(true);
    try {
      const payload = {
        name: name.trim(),
        description,
        server_id: Number(serverId),
        labels,
        max_executors: Number(maxExecutors) || 2,
        workspace_path: workspacePath || '/data/aiops-workspace',
      };
      if (editNode) {
        await buildNodeApi.update(editNode.id, payload);
        toast.success(i18n.t('deploy.toast.updated'));
      } else {
        await buildNodeApi.create(payload);
        toast.success(i18n.t('kubernetes.event.created'));
      }
      setDialogOpen(false);
      load();
    } catch {
      toast.error(i18n.t('cloud.operationFailed'));
    } finally {
      setSubmitting(false);
    }
  };

  const handleDelete = async (node: BuildNode) => {
    const ok = await confirm({ title: i18n.t('kubernetes.topology.deleteNode'), description: i18n.t('deploy.buildNodes.deleteConfirm', { name: node.name }) });
    if (!ok) return;
    try {
      await buildNodeApi.delete(node.id);
      toast.success(i18n.t('monitor.silenceRules.deleted'));
      load();
    } catch {
      toast.error(i18n.t('deploy.buildNodes.loadFailed'));
    }
  };

  const handleTest = async (node: BuildNode) => {
    setTestingId(node.id);
    try {
      const res = await buildNodeApi.test(node.id) as { success?: boolean; message?: string };
      if (res?.success) {
        toast.success(i18n.t('deploy.buildNodes.testSuccess') + (res.message ? `: ${res.message}` : ''));
      } else {
        toast.error(res?.message || i18n.t('aiops.llmTestFailed'));
      }
    } catch {
      toast.error(i18n.t('monitor.alertChannels.testFailed'));
    } finally {
      setTestingId(null);
    }
  };

  const handleToggle = async (node: BuildNode) => {
    try {
      await buildNodeApi.update(node.id, { enabled: !node.enabled });
      load();
    } catch {
      toast.error(i18n.t('kubernetes.deployment.imageUpdateFailed'));
    }
  };

  const handleSaveMaster = async () => {
    const n = Number(masterMax);
    if (!n || n < 1) {
      toast.error(i18n.t('deploy.buildNodes.loadFailed'));
      return;
    }
    setSavingMaster(true);
    try {
      const res = await buildNodeApi.updateMaster({ max_executors: n });
      const m = res as { max_executors?: number; running_count?: number };
      setMaster((prev) => ({
        ...prev,
        max_executors: m?.max_executors ?? n,
        running_count: m?.running_count ?? prev.running_count,
      }));
      toast.success(i18n.t('deploy.buildNodes.deleted'));
    } catch {
      toast.error(i18n.t('kubernetes.deployment.imageUpdateFailed'));
    } finally {
      setSavingMaster(false);
    }
  };

  const panel = (
    <div className={embedded ? 'space-y-4' : 'mt-4 space-y-4'}>
        <ContentPanel
          toolbar={(
            <div className="flex items-center justify-between w-full">
              <span className="text-sm font-medium text-[var(--dg-text-primary)]"> {i18n.t('pipeline.buildNodes')} </span>
              <div className="flex gap-2">
                <Button variant="ghost" size="sm" onClick={load} disabled={loading}>
                  <RefreshCw className={`h-3.5 w-3.5 mr-1${loading ? ' animate-spin' : ''}`} />刷新
                </Button>
                <Button size="sm" onClick={openCreate}>
                  <Plus className="h-3.5 w-3.5 mr-1" />添加
                </Button>
              </div>
            </div>
          )}
        >
          <div className="mb-3 p-3 rounded-lg border border-[var(--dg-border)] bg-[var(--dg-bg-secondary)]">
            <div className="flex flex-wrap items-center justify-between gap-3">
              <div className="flex items-center gap-2">
                <Cpu className="h-4 w-4 text-[var(--dg-text-muted)]" />
                <span className="text-sm font-medium text-[var(--dg-text-primary)]">{i18n.t('deploy.buildNodes.masterBuiltin')}</span>
                <Badge variant="outline" className="text-[10px]"> {i18n.t('pipeline.buildNodesManage.defaultSchedule')} </Badge>
                <span className="text-xs text-[var(--dg-text-muted)]">
                  {i18n.t('deploy.buildNodes.executorUsage', { running: master.running_count, max: master.max_executors })}
                </span>
              </div>
              <div className="flex items-center gap-2">
                <Label className="text-xs text-[var(--dg-text-muted)] shrink-0"> {i18n.t('pipeline.buildNodesManage.maxConcurrency')} </Label>
                <Input
                  type="number"
                  min={1}
                  max={32}
                  value={masterMax}
                  onChange={(e) => setMasterMax(e.target.value)}
                  className="h-7 w-16 text-xs dg-input"
                />
                <Button size="sm" className="h-7 text-xs" onClick={handleSaveMaster} disabled={savingMaster}>
                  {savingMaster ? i18n.t('deploy.buildNodes.saving') : i18n.t('task.script.save')}
                </Button>
              </div>
            </div>
            <p className="text-[11px] text-[var(--dg-text-muted)] mt-2">
              {i18n.t('deploy.buildNodes.schedulingHint')}
            </p>
          </div>

          {nodes.length === 0 ? (
            <PageEmpty
              title={i18n.t('deploy.buildNodes.noRemoteNodes')}
              description={i18n.t('deploy.buildNodes.noRemoteDesc')}
              action={<Button size="sm" onClick={openCreate}><Plus className="h-3.5 w-3.5 mr-1" /> {i18n.t('kubernetes.topology.addNode')} </Button>}
            />
          ) : (
            <div className="space-y-2">
              {nodes.map((node) => (
                <div
                  key={node.id}
                  className="flex items-center justify-between gap-3 p-3 rounded-lg border border-[var(--dg-border)] hover:bg-[var(--dg-bg-secondary)]/50"
                >
                  <div className="min-w-0 flex-1">
                    <div className="flex items-center gap-2 flex-wrap">
                      <span className="font-medium text-sm text-[var(--dg-text-primary)]">{node.name}</span>
                      <Badge variant={node.enabled ? 'default' : 'secondary'} className="text-[10px]">
                        {node.enabled ? i18n.t('system.userActive') : i18n.t('system.userInactive')}
                      </Badge>
                      <span className="text-[10px] text-[var(--dg-text-muted)] font-mono">
                        {node.hostname || node.ip || `server#${node.server_id}`}
                      </span>
                    </div>
                    <div className="flex items-center gap-3 mt-1 text-[11px] text-[var(--dg-text-muted)]">
                      <span>{i18n.t('deploy.buildNodes.executorLabel', { running: node.running_count || 0, max: node.max_executors })}</span>
                      {node.labels && <span>{i18n.t('deploy.buildNodes.labelsLabel', { labels: node.labels })}</span>}
                      <span className="truncate">{node.workspace_path}</span>
                    </div>
                  </div>
                  <div className="flex items-center gap-1 shrink-0">
                    <Button variant="ghost" size="sm" className="h-7 text-xs" disabled={testingId === node.id} onClick={() => handleTest(node)}>
                      {testingId === node.id ? i18n.t('deploy.buildNodes.testing') : i18n.t('pipeline.testTool')}
                    </Button>
                    <Button variant="ghost" size="sm" className="h-7 text-xs" onClick={() => handleToggle(node)}>
                      {node.enabled ? i18n.t('system.userInactive') : i18n.t('system.userActive')}
                    </Button>
                    <Button variant="ghost" size="icon" className="h-7 w-7" onClick={() => openEdit(node)}>
                      <Pencil className="h-3.5 w-3.5" />
                    </Button>
                    <Button variant="ghost" size="icon" className="h-7 w-7" onClick={() => handleDelete(node)}>
                      <Trash2 className="h-3.5 w-3.5 text-[var(--dg-red)]" />
                    </Button>
                  </div>
                </div>
              ))}
            </div>
          )}
        </ContentPanel>
    </div>
  );

  const dialog = (
      <Dialog open={dialogOpen} onOpenChange={setDialogOpen}>
        <DialogContent className="max-w-md bg-[var(--dg-bg-primary)] border-[var(--dg-border)]">
          <DialogHeader>
            <DialogTitle>{editNode ? i18n.t('kubernetes.topology.editNode') : i18n.t('kubernetes.topology.addNode')}</DialogTitle>
            <DialogDescription className="text-[var(--dg-text-muted)]">
              基于服务器 SSH 凭据注册构建 Agent，流水线可绑定或自动调度
            </DialogDescription>
          </DialogHeader>
          <div className="space-y-3">
            <div className="space-y-1">
              <Label className="text-xs"> {i18n.t('kubernetes.node.nodeName')} </Label>
              <Input value={name} onChange={(e) => setName(e.target.value)} className="h-8 text-xs dg-input" placeholder="build-node-01" />
            </div>
            <div className="space-y-1">
              <Label className="text-xs"> {i18n.t('common.tag')} </Label>
              <Select value={serverId || '__none'} onValueChange={(v) => setServerId(v === '__none' ? '' : v)}>
                <SelectTrigger className="h-8 text-xs dg-input"><SelectValue placeholder={i18n.t('deploy.buildNodes.selectServer')} /></SelectTrigger>
                <SelectContent>
                  <SelectItem value="__none"> {i18n.t('k8s.storage.pleaseSelect')} </SelectItem>
                  {servers.map((s) => (
                    <SelectItem key={s.id} value={String(s.id)}>
                      {s.hostname} ({s.ip})
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
            </div>
            <div className="grid grid-cols-2 gap-2">
              <div className="space-y-1">
                <Label className="text-xs"> {i18n.t('pipeline.buildNodesManage.maxConcurrency')} </Label>
                <Input value={maxExecutors} onChange={(e) => setMaxExecutors(e.target.value)} type="number" min={1} className="h-8 text-xs dg-input" />
              </div>
              <div className="space-y-1">
                <Label className="text-xs"> {i18n.t('pipeline.buildNodesManage.workspacePath')} </Label>
                <Input value={workspacePath} onChange={(e) => setWorkspacePath(e.target.value)} className="h-8 text-xs font-mono dg-input" />
              </div>
            </div>
            <div className="space-y-1">
              <Label className="text-xs"> {i18n.t('kubernetes.namespace.labels')} <span className="text-[var(--dg-text-muted)]">(可选)</span></Label>
              <Input value={labels} onChange={(e) => setLabels(e.target.value)} className="h-8 text-xs dg-input" placeholder="linux,docker,high-mem" />
            </div>
            <div className="space-y-1">
              <Label className="text-xs"> {i18n.t('aiops.llmModelDesc')} </Label>
              <Input value={description} onChange={(e) => setDescription(e.target.value)} className="h-8 text-xs dg-input" />
            </div>
            <div className="flex justify-end gap-2 pt-2">
              <Button variant="outline" onClick={() => setDialogOpen(false)}> {i18n.t('rbac.jobRole.cancel')} </Button>
              <Button onClick={handleSubmit} disabled={submitting}>{submitting ? i18n.t('deploy.buildNodes.saving') : i18n.t('task.script.save')}</Button>
            </div>
          </div>
        </DialogContent>
      </Dialog>
  );

  if (embedded) {
    return (
      <>
        {panel}
        {dialog}
      </>
    );
  }

  return (
    <PageShell title={i18n.t('pipeline.buildNodes')} subtitle={i18n.t('deploy.pipeline.buildNodes')}>
      {panel}
      {dialog}
    </PageShell>
  );
}