// 远程执行页 — 关联主机后批量执行命令 / 上传文件（Go-native SSH） // Logan.Li
// 对接后端 /remote-exec/*（controller.RemoteExecHandler + pkg/remoteexec），替代已移除的 Ansible。
import { useState, useEffect } from 'react';
import {
  Terminal, Upload, RefreshCw, Loader2, Server as ServerIcon, CheckCircle2, XCircle, FileUp,
} from 'lucide-react';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Checkbox } from '@/components/ui/checkbox';
import { Badge } from '@/components/ui/badge';
import { toast } from 'sonner';
import { useConfirm } from '@/components/ui/confirm-dialog';
import { serverApi, remoteExecApi, type RemoteExecResult, type RemoteUploadResult } from '@/api';
import { PageShell } from '@/components/layout/PageShell';
import { PageEmpty } from '@/components/layout/PageEmpty';
import type { JsonData } from '@/types/common';
import i18n from '@/i18n';

interface RemoteServer {
  id: number; hostname: string; ip: string; username: string; port: number;
  auth_type: string; status: string; has_auth?: boolean;
}

export function RemoteExecPage() {
  const _confirm = useConfirm();
  const [servers, setServers] = useState<RemoteServer[]>([]);
  const [selected, setSelected] = useState<Set<number>>(new Set());
  const [keyword, setKeyword] = useState('');
  const [loading, setLoading] = useState(true);
  const [tab, setTab] = useState<'exec' | 'upload'>('exec');
  const [command, setCommand] = useState('');
  const [timeoutSec, setTimeoutSec] = useState(60);
  const [file, setFile] = useState<File | null>(null);
  const [remotePath, setRemotePath] = useState('/tmp/');
  const [execResults, setExecResults] = useState<RemoteExecResult[]>([]);
  const [uploadResults, setUploadResults] = useState<RemoteUploadResult[]>([]);
  const [running, setRunning] = useState(false);

  const load = async () => {
    setLoading(true);
    try {
      const res = await serverApi.getServers({ page: 1, page_size: 500, keyword });
      setServers(((res as JsonData)?.list as RemoteServer[]) || []);
    } catch { toast.error(i18n.t('task.remoteexecpaget.s68755a4d')); }
    finally { setLoading(false); }
  };
  useEffect(() => { load(); }, []);

  const selIds = [...selected];
  const selCount = selIds.length;
  const toggle = (id: number) => {
    const next = new Set(selected);
    if (next.has(id)) {
      next.delete(id);
    } else {
      next.add(id);
    }
    setSelected(next);
  };
  const toggleAll = () => {
    setSelected(selected.size === servers.length ? new Set() : new Set(servers.map(s => s.id)));
  };

  const doExec = async () => {
    if (!command.trim()) { toast.error(i18n.t('agent.agentmonitortsx.s9358aada')); return; }
    if (selCount === 0) { toast.error(i18n.t('task.remoteexecpaget.se62f41c4')); return; }
    const ok = await _confirm({
      title: i18n.t('task.remoteexecpaget.s110b7142'),
      description: `将在 ${selCount} 台主机上执行该命令，请确认命令安全：\n\n${command}`,
      confirmText: i18n.t('deploy.label.execute'), variant: 'destructive',
    });
    if (!ok) return;
    setRunning(true); setExecResults([]);
    try {
      const res = await remoteExecApi.execute({ server_ids: selIds, command, timeout: timeoutSec });
      setExecResults(res || []);
      const succ = (res || []).filter(r => r.success).length;
      toast.success(`执行完成：${succ}/${selCount} 成功`);
    } catch { toast.error(i18n.t('automation.systemTaskFailed')); }
    finally { setRunning(false); }
  };

  const doUpload = async () => {
    if (!file) { toast.error(i18n.t('task.remoteexecpaget.s68ea13ee')); return; }
    if (!remotePath.trim()) { toast.error(i18n.t('task.remoteexecpaget.sb68231b8')); return; }
    if (selCount === 0) { toast.error(i18n.t('task.remoteexecpaget.se62f41c4')); return; }
    const dst = remotePath.trim().endsWith('/') ? remotePath.trim() + file.name : remotePath.trim();
    setRunning(true); setUploadResults([]);
    try {
      const res = await remoteExecApi.uploadFile({ server_ids: selIds, remote_path: dst, file });
      setUploadResults(res || []);
      const succ = (res || []).filter(r => r.success).length;
      toast.success(`上传完成：${succ}/${selCount} 成功`);
    } catch { toast.error(i18n.t('common.uploadFailed')); }
    finally { setRunning(false); }
  };

  return (
    <PageShell
      variant="workspace"
      title={i18n.t('automation.remoteExec')}
      subtitle={i18n.t('task.remoteexecpaget.s123ad5f6')}
      icon={<Terminal className="h-5 w-5" />}
      contentClassName="flex-1 min-h-0"
      loading={loading}
      actions={(
        <Button variant="outline" size="sm" className="dg-btn-secondary" onClick={load}>
          <RefreshCw className="w-3.5 h-3.5 mr-1" />
          刷新
        </Button>
      )}
    >
      <div className="grid grid-cols-12 gap-4 flex-1 min-h-0">
        {/* 左侧：主机选择 */}
        <Card className="col-span-5 dg-card">
          <CardHeader className="pb-3">
            <CardTitle className="text-sm flex items-center justify-between text-[var(--dg-text-primary)]">
              <span className="flex items-center gap-2"><ServerIcon className="h-4 w-4 dg-text-blue" /> {i18n.t('automation.remoteSelectHost')} </span>
              <Input
                placeholder={i18n.t('task.remoteexecpaget.s253acd21')}
                value={keyword}
                onChange={(e) => setKeyword(e.target.value)}
                onKeyDown={(e) => e.key === 'Enter' && load()}
                className="h-7 w-40 text-xs dg-input"
              />
            </CardTitle>
          </CardHeader>
          <CardContent className="max-h-[520px] overflow-y-auto space-y-1">
            {servers.length === 0 ? (
              <PageEmpty
                title={i18n.t('dashboard.serversStatus.empty')}
                description={i18n.t('task.remoteexecpaget.s0afbf1fc')}
                className="py-10"
              />
            ) : (
              <>
                <div className="flex items-center gap-2 px-2 py-1.5 text-xs dg-text-secondary border-b border-[var(--dg-border)]">
                  <Checkbox checked={selected.size === servers.length && servers.length > 0} onCheckedChange={toggleAll} />
                  全选（{servers.length} 台）
                  {selCount > 0 && <Badge className="ml-auto bg-blue-500/20 dg-text-blue">已选 {selCount}</Badge>}
                </div>
                {servers.map(s => (
                  <label key={s.id} className="flex items-center gap-2 px-2 py-1.5 rounded hover:bg-[var(--dg-bg-tertiary)] cursor-pointer">
                    <Checkbox checked={selected.has(s.id)} onCheckedChange={() => toggle(s.id)} />
                    <div className="flex-1 min-w-0">
                      <div className="text-xs font-medium text-[var(--dg-text-primary)] truncate">{s.hostname}</div>
                      <div className="text-[10px] text-[var(--dg-text-muted)] font-mono">{s.ip} · {s.username || 'root'}</div>
                    </div>
                    {s.has_auth === false
                      ? <Badge className="bg-amber-500/20 dg-text-yellow text-[10px]"> {i18n.t('task.remoteexecpaget.s152f5300')} </Badge>
                      : <Badge className="bg-emerald-500/20 dg-text-green text-[10px]">{s.auth_type === 'key' ? i18n.t('system.credentialKey') : i18n.t('system.passwordLabel')}</Badge>}
                  </label>
                ))}
              </>
            )}
          </CardContent>
        </Card>

        {/* 右侧：操作 + 结果（内部子 Tab 保留按钮切换） // Logan.Li */}
        <div className="col-span-7 space-y-4">
          <div className="flex gap-2">
            <Button
              variant={tab === 'exec' ? 'default' : 'outline'}
              size="sm"
              onClick={() => setTab('exec')}
              className={tab === 'exec' ? 'dg-btn-primary h-8 text-xs gap-1' : 'dg-btn-secondary h-8 text-xs gap-1'}
            >
              <Terminal className="w-3.5 h-3.5" />执行命令
            </Button>
            <Button
              variant={tab === 'upload' ? 'default' : 'outline'}
              size="sm"
              onClick={() => setTab('upload')}
              className={tab === 'upload' ? 'dg-btn-primary h-8 text-xs gap-1' : 'dg-btn-secondary h-8 text-xs gap-1'}
            >
              <Upload className="w-3.5 h-3.5" />上传文件
            </Button>
          </div>

          {tab === 'exec' ? (
            <Card className="dg-card">
              <CardHeader className="pb-3"><CardTitle className="text-sm text-[var(--dg-text-primary)]"> {i18n.t('task.remoteexecpaget.seb6e67f1')} </CardTitle></CardHeader>
              <CardContent className="space-y-3">
                <textarea
                  value={command}
                  onChange={(e) => setCommand(e.target.value)}
                  rows={5}
                  placeholder={i18n.t('task.remoteexecpaget.s76628808')}
                  className="w-full bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-md px-3 py-2 text-xs font-mono text-[var(--dg-text-primary)] resize-none"
                />
                <div className="flex items-center gap-3">
                  <span className="text-xs dg-text-secondary"> {i18n.t('automation.remoteTimeout')} </span>
                  <Input type="number" min={1} value={timeoutSec} onChange={(e) => setTimeoutSec(Number(e.target.value) || 60)}
                    className="h-8 w-24 text-xs dg-input" />
                  <Button onClick={doExec} disabled={running} className="ml-auto dg-btn-primary h-8 text-xs">
                    {running ? <Loader2 className="w-3.5 h-3.5 mr-1 animate-spin" /> : <Terminal className="w-3.5 h-3.5 mr-1" />}
                    执行（{selCount} 台）
                  </Button>
                </div>
              </CardContent>
            </Card>
          ) : (
            <Card className="dg-card">
              <CardHeader className="pb-3"><CardTitle className="text-sm text-[var(--dg-text-primary)]"> {i18n.t('task.remoteexecpaget.s30048caa')} </CardTitle></CardHeader>
              <CardContent className="space-y-3">
                <div className="space-y-1.5">
                  <span className="text-xs dg-text-secondary"> {i18n.t('task.remoteexecpaget.sb7e21a1e')} </span>
                  <Input type="file" onChange={(e) => setFile(e.target.files?.[0] || null)}
                    className="h-8 text-xs dg-input" />
                  {file && <span className="text-[10px] text-[var(--dg-text-muted)]">{file.name} ({(file.size / 1024).toFixed(1)} KB)</span>}
                </div>
                <div className="space-y-1.5">
                  <span className="text-xs dg-text-secondary"> {i18n.t('task.remoteexecpaget.sb47f0323')} </span>
                  <Input value={remotePath} onChange={(e) => setRemotePath(e.target.value)} placeholder={i18n.t('task.remoteexecpaget.sd4b44a36')}
                    className="h-8 text-xs font-mono dg-input" />
                </div>
                <Button onClick={doUpload} disabled={running} className="dg-btn-primary h-8 text-xs">
                  {running ? <Loader2 className="w-3.5 h-3.5 mr-1 animate-spin" /> : <FileUp className="w-3.5 h-3.5 mr-1" />}
                  上传（{selCount} 台）
                </Button>
              </CardContent>
            </Card>
          )}

          {(execResults.length > 0 || uploadResults.length > 0) && (
            <Card className="dg-card">
              <CardHeader className="pb-3"><CardTitle className="text-sm text-[var(--dg-text-primary)]"> {i18n.t('automation.remoteExecResult')} </CardTitle></CardHeader>
              <CardContent className="space-y-2 max-h-[300px] overflow-y-auto">
                {execResults.map((r, i) => (
                  <div key={i} className="p-2 rounded border border-[var(--dg-border)] bg-[var(--dg-bg-tertiary)]">
                    <div className="flex items-center gap-2 mb-1">
                      {r.success ? <CheckCircle2 className="w-3.5 h-3.5 dg-text-green" /> : <XCircle className="w-3.5 h-3.5 dg-text-red" />}
                      <span className="text-xs font-mono text-[var(--dg-text-primary)]">{r.host}</span>
                      <Badge className={r.success ? 'bg-emerald-500/20 dg-text-green text-[10px]' : 'bg-red-500/20 dg-text-red text-[10px]'}>
                        exit={r.exit_code} · {r.duration}ms
                      </Badge>
                    </div>
                    <pre className="text-[10px] font-mono dg-text-secondary whitespace-pre-wrap break-all max-h-32 overflow-y-auto">
                      {r.error || r.output || i18n.t('task.remoteexecpaget.s1a63831c')}
                    </pre>
                  </div>
                ))}
                {uploadResults.map((r, i) => (
                  <div key={i} className="p-2 rounded border border-[var(--dg-border)] bg-[var(--dg-bg-tertiary)]">
                    <div className="flex items-center gap-2">
                      {r.success ? <CheckCircle2 className="w-3.5 h-3.5 dg-text-green" /> : <XCircle className="w-3.5 h-3.5 dg-text-red" />}
                      <span className="text-xs font-mono text-[var(--dg-text-primary)]">{r.host}</span>
                      <span className="text-[10px] text-[var(--dg-text-muted)] truncate">{r.remote_path}</span>
                      {r.error && <span className="text-[10px] dg-text-red ml-auto">{r.error}</span>}
                    </div>
                  </div>
                ))}
              </CardContent>
            </Card>
          )}
        </div>
      </div>
    </PageShell>
  );
}