import { ChevronDown, Database, Loader2, PanelRightClose, PanelRightOpen, Play, Sparkles } from 'lucide-react';
import type { DBType } from '@/lib/queryTemplates';
import { dbTypeIcon, dbTypeLabel } from '../constants';
import type { QueryInstanceOption } from '../types';

interface QueryTopBarProps {
  /** 可选实例列表 */
  instances: QueryInstanceOption[];
  /** 当前选中实例 id(字符串形式) */
  instanceId: string;
  /** 已选实例(用于展示库类型图标) */
  selectedInstance: QueryInstanceOption | undefined;
  /** 当前选中数据库 */
  database: string;
  /** 可选数据库列表(MySQL/PG) */
  databases: string[];
  /** 数据库列表加载中 */
  loadingDbs: boolean;
  /** 归一化后的库类型 */
  dbType: DBType;
  /** Schema 侧栏是否可见 */
  showSidebar: boolean;
  /** 模板面板是否展开 */
  showTemplates: boolean;
  /** 历史抽屉是否展开 */
  showHistory: boolean;
  /** 是否正在执行查询 */
  executing: boolean;
  /** 模板总数 */
  templateCount: number;
  /** 历史记录总数 */
  onInstanceIdChange: (instanceId: string) => void;
  onDatabaseChange: (database: string) => void;
  onToggleSidebar: () => void;
  onToggleTemplates: () => void;
  onToggleHistory: () => void;
  /** 执行查询(等价于第 1 页) */
  onExecute: () => void;
}

/** 查询页顶栏:实例/数据库选择 + 模板/历史/导航/执行工具按钮 */
export function QueryTopBar({
  instances,
  instanceId,
  selectedInstance,
  database,
  databases,
  loadingDbs,
  dbType,
  showSidebar,
  showTemplates,
  showHistory,
  executing,
  templateCount,
  onInstanceIdChange,
  onDatabaseChange,
  onToggleSidebar,
  onToggleTemplates,
  onToggleHistory,
  onExecute,
}: QueryTopBarProps) {
  return (
    <div className="shrink-0 px-0 md:px-5 pt-1 md:pt-4 pb-2">
      <div className="flex items-center gap-3 flex-wrap">
        <div className="flex items-center gap-2 flex-1 min-w-full md:min-w-0 flex-wrap md:flex-nowrap">
          {selectedInstance && dbTypeIcon[dbType] && (
            <img src={dbTypeIcon[dbType]} alt="" className="w-5 h-5 object-contain" />
          )}
          <select
            value={instanceId}
            onChange={(e) => onInstanceIdChange(e.target.value)}
            className="px-3 py-2 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none min-w-0 w-full md:w-auto md:min-w-[200px]"
          >
            <option value="">选择实例</option>
            {instances.map((inst) => (
              <option key={inst.id} value={inst.id}>
                {inst.name} ({dbTypeLabel[inst.db_type] || inst.db_type})
              </option>
            ))}
          </select>

          {dbType === 'redis' ? (
            <select
              value={database || '0'}
              onChange={(e) => onDatabaseChange(e.target.value)}
              className="px-3 py-2 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none w-full md:w-24"
            >
              {Array.from({ length: 16 }, (_, i) => (
                <option key={i} value={String(i)}>
                  DB{i}
                </option>
              ))}
            </select>
          ) : (
            <select
              value={database}
              onChange={(e) => onDatabaseChange(e.target.value)}
              className="px-3 py-2 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none min-w-0 w-full md:w-auto md:min-w-[160px]"
            >
              <option value="">{loadingDbs ? '加载中...' : '选择数据库'}</option>
              {databases.map((db) => (
                <option key={db} value={db}>
                  {db}
                </option>
              ))}
            </select>
          )}
        </div>

        {/* 右侧工具按钮组 */}
        <div className="flex items-center gap-2 w-full md:w-auto overflow-x-auto pb-1 md:pb-0">
          {instanceId && (
            <button
              onClick={onToggleSidebar}
              className={`dg-btn dg-btn-ghost dg-btn-sm ${showSidebar ? 'bg-blue-500/15 text-blue-400 border-blue-500/30' : ''}`}
            >
              <Database className="w-3.5 h-3.5" />
              {showSidebar ? '隐藏' : '导航'}
            </button>
          )}
          <button onClick={onToggleTemplates} className="dg-btn dg-btn-ghost dg-btn-sm">
            <Sparkles className="w-3.5 h-3.5 text-blue-400" />
            模板 ({templateCount})
            <ChevronDown className={`w-3 h-3 transition-transform ${showTemplates ? 'rotate-180' : ''}`} />
          </button>
          <button
            onClick={onToggleHistory}
            className={`dg-btn dg-btn-ghost dg-btn-sm ${showHistory ? 'bg-blue-500/15 text-blue-400 border-blue-500/30' : ''}`}
          >
            {showHistory ? <PanelRightClose className="w-3.5 h-3.5" /> : <PanelRightOpen className="w-3.5 h-3.5" />}
            历史
          </button>
          <button
            onClick={onExecute}
            disabled={executing || !instanceId}
            className="dg-btn dg-btn-primary ml-auto md:ml-0"
          >
            {executing ? <Loader2 className="w-4 h-4 animate-spin" /> : <Play className="w-4 h-4" />}
            {executing ? '执行中...' : '执行'}
          </button>
        </div>
      </div>
    </div>
  );
}