// 内置系统任务面板 — 表格式紧凑布局 // Logan.Li
import { useState, useEffect, useCallback } from 'react';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { ContentPanel } from '@/components/layout/ContentPanel';
import { PageEmpty } from '@/components/layout/PageEmpty';
import { systemTaskApi, type SystemTaskItem } from '@/api';
import { usePermission } from '@/hooks/usePermission';
import { useConfirm } from '@/components/ui/confirm-dialog';
import { toast } from 'sonner';
import { formatRelativeTime } from './cronJobHelpers';
import {
  ServerCog, Play, Loader2, Shield, Trash2, Clock, CheckCircle, XCircle, AlertCircle,
} from 'lucide-react';

const categoryLabel: Record<string, string> = {
  monitor: '监控',
  cleanup: '清理',
};

function statusBadge(status?: string) {
  switch (status) {
    case 'success':
      return (
        <Badge variant="outline" className="border-emerald-500/30 dg-text-green bg-emerald-500/10 gap-1 h-5 text-[11px] px-1.5">
          <CheckCircle className="h-2.5 w-2.5" />成功
        </Badge>
      );
    case 'failed':
      return (
        <Badge variant="outline" className="border-red-500/30 dg-text-red bg-red-500/10 gap-1 h-5 text-[11px] px-1.5">
          <XCircle className="h-2.5 w-2.5" />失败
        </Badge>
      );
    case 'running':
      return (
        <Badge variant="outline" className="border-blue-500/30 dg-text-blue bg-blue-500/10 gap-1 h-5 text-[11px] px-1.5">
          <Loader2 className="h-2.5 w-2.5 animate-spin" />运行中
        </Badge>
      );
    default:
      return (
        <Badge variant="outline" className="border-[var(--dg-border)] dg-text-muted gap-1 h-5 text-[11px] px-1.5">
          <AlertCircle className="h-2.5 w-2.5" />待执行
        </Badge>
      );
  }
}

interface Props {
  refreshing?: boolean;
}

export function SystemTasksPanel({ refreshing }: Props) {
  const _confirm = useConfirm();
  const { hasAnyPermission, isAdmin } = usePermission();
  const canRun = isAdmin || hasAnyPermission(['auto:script', 'auto:cron', 'auto:ansible']);
  const [tasks, setTasks] = useState<SystemTaskItem[]>([]);
  const [loading, setLoading] = useState(true);
  const [runningCode, setRunningCode] = useState<string | null>(null);

  const load = useCallback(async () => {
    try {
      const res = await systemTaskApi.list();
      setTasks(res.list || []);
    } catch (e: unknown) {
      toast.error(e instanceof Error ? e.message : '加载系统任务失败');
    } finally {
      setLoading(false);
    }
  }, []);

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

  const handleRun = async (task: SystemTaskItem) => {
    const ok = await _confirm({
      title: '立即执行',
      description: `确定手动执行系统任务「${task.name}」吗？`,
      confirmText: '执行',
    });
    if (!ok) return;
    setRunningCode(task.code);
    try {
      const res = await systemTaskApi.run(task.code);
      toast.success(res.last_message || '执行完成');
      await load();
    } catch (e: unknown) {
      toast.error(e instanceof Error ? e.message : '执行失败');
    } finally {
      setRunningCode(null);
    }
  };

  if (loading) {
    return (
      <div className="flex justify-center py-12">
        <Loader2 className="h-6 w-6 animate-spin dg-text-muted" />
      </div>
    );
  }

  if (tasks.length === 0) {
    return <PageEmpty title="暂无系统任务" />;
  }

  const failedCount = tasks.filter((t) => t.last_status === 'failed').length;

  return (
    <ContentPanel>
      <div className="flex items-center justify-between gap-3 mb-3 px-0.5">
        <p className="text-xs dg-text-muted">
          进程内置调度，不可编辑；清理类任务支持手动触发
        </p>
        <div className="flex items-center gap-2 text-[11px] shrink-0">
          <span className="dg-text-muted">{tasks.length} 个任务</span>
          {failedCount > 0 && (
            <Badge variant="outline" className="border-red-500/30 dg-text-red bg-red-500/10 h-5 text-[10px]">
              {failedCount} 个失败
            </Badge>
          )}
        </div>
      </div>

      <div className="rounded-lg border border-[var(--dg-border)] overflow-hidden">
        {/* 表头 */}
        <div className="hidden md:grid md:grid-cols-[minmax(0,1.2fr)_minmax(0,1.6fr)_minmax(0,1fr)_72px] gap-3 px-3 py-2 bg-[var(--dg-bg-secondary)] border-b border-[var(--dg-border)] text-[11px] dg-text-muted">
          <span>任务</span>
          <span>调度 / 说明</span>
          <span>最近执行</span>
          <span className="text-right">操作</span>
        </div>

        <div className="divide-y divide-[var(--dg-border)]">
          {tasks.map((task) => (
            <div
              key={task.code}
              className="grid grid-cols-1 md:grid-cols-[minmax(0,1.2fr)_minmax(0,1.6fr)_minmax(0,1fr)_72px] gap-2 md:gap-3 px-3 py-2 items-center hover:bg-[var(--dg-bg-hover)]/40 transition-colors"
            >
              <div className="flex items-center gap-2 min-w-0">
                <ServerCog className="h-3.5 w-3.5 dg-text-cyan shrink-0" />
                <div className="min-w-0">
                  <div className="flex items-center gap-1 flex-wrap">
                    <span className="text-sm font-medium text-[var(--dg-text-primary)] truncate">{task.name}</span>
                    <Badge variant="outline" className="border-cyan-500/30 text-cyan-500 bg-cyan-500/10 h-5 text-[10px] px-1">
                      内置
                    </Badge>
                    <Badge variant="outline" className="border-[var(--dg-border)] dg-text-secondary h-5 text-[10px] px-1">
                      {categoryLabel[task.category] || task.category}
                    </Badge>
                  </div>
                  <div className="mt-0.5">{statusBadge(task.last_status)}</div>
                </div>
              </div>

              <div className="min-w-0 text-xs dg-text-secondary pl-5 md:pl-0">
                <p className="truncate" title={task.description}>{task.description}</p>
                <div className="flex flex-wrap items-center gap-x-2.5 mt-0.5 dg-text-muted text-[11px]">
                  <span className="inline-flex items-center gap-1">
                    <Clock className="h-3 w-3" />
                    {task.schedule}
                  </span>
                  {task.category === 'cleanup' && task.code === 'audit_log_cleanup' && task.extra?.retention_days != null && (
                    <span className="inline-flex items-center gap-1">
                      <Trash2 className="h-3 w-3" />
                      保留 {String(task.extra.retention_days)} 天
                    </span>
                  )}
                  {task.code === 'alert_engine' && task.extra && (
                    <span className="inline-flex items-center gap-1">
                      <Shield className="h-3 w-3" />
                      {(task.extra as { is_leader?: boolean }).is_leader ? 'Leader' : 'Follower'}
                    </span>
                  )}
                </div>
              </div>

              <div className="min-w-0 text-[11px] dg-text-muted pl-5 md:pl-0">
                <div>{formatRelativeTime(task.last_run_at ?? undefined)}</div>
                <div className="flex items-center gap-2 mt-0.5">
                  {task.last_duration_ms != null && task.last_duration_ms > 0 && (
                    <span>{task.last_duration_ms}ms</span>
                  )}
                  <span>{task.run_count ?? 0} 次</span>
                </div>
                {task.last_message && (
                  <p className="truncate font-mono mt-0.5 max-w-full" title={task.last_message}>
                    {task.last_message}
                  </p>
                )}
              </div>

              <div className="flex justify-start md:justify-end pl-5 md:pl-0">
                {task.runnable && canRun ? (
                  <Button
                    variant="outline"
                    size="sm"
                    className="border-emerald-600 dg-text-green hover:bg-emerald-600/20 h-7 px-2 text-xs"
                    disabled={runningCode === task.code}
                    onClick={() => handleRun(task)}
                  >
                    {runningCode === task.code ? (
                      <Loader2 className="h-3 w-3 animate-spin" />
                    ) : (
                      <Play className="h-3 w-3" />
                    )}
                  </Button>
                ) : (
                  <span className="text-[11px] dg-text-muted">自动</span>
                )}
              </div>
            </div>
          ))}
        </div>
      </div>
    </ContentPanel>
  );
}