import React from 'react';
import { LucideIcon } from 'lucide-react';

export interface TabItem {
  id: string;
  label: string;
  icon?: LucideIcon;
  count?: number;
  disabled?: boolean;
}

interface TabNavigationProps {
  tabs: TabItem[];
  activeTab: string;
  onTabChange: (tabId: string) => void;
  variant?: 'default' | 'pills' | 'underline';
  size?: 'sm' | 'md' | 'lg';
  className?: string;
}

/**
 * 统一的选项卡导航组件
 * 支持多种样式变体和尺寸
 */
export const TabNavigation: React.FC<TabNavigationProps> = ({
  tabs,
  activeTab,
  onTabChange,
  variant = 'default',
  size = 'md',
  className = '',
}) => {
  const getTabClasses = (tab: TabItem, isActive: boolean) => {
    const baseClasses = 'inline-flex items-center gap-2 font-medium';
    
    // 尺寸样式
    const sizeClasses = {
      sm: 'px-3 py-2 text-sm',
      md: 'px-4 py-2.5 text-sm',
      lg: 'px-5 py-3 text-base',
    };

    // 变体样式
    const variantClasses = {
      default: isActive
        ? 'text-primary-600 border-b-2 border-primary-500 bg-white rounded-t-lg'
        : 'text-gray-500 hover:text-gray-700 hover:bg-gray-50 rounded-t-lg',
      pills: isActive
        ? 'text-primary-600 bg-primary-100 border border-primary-200 rounded-lg'
        : 'text-gray-500 hover:text-gray-700 hover:bg-gray-100 rounded-lg',
      underline: isActive
        ? 'text-primary-600 border-b-2 border-primary-500'
        : 'text-gray-500 hover:text-gray-700 border-b-2 border-transparent hover:border-gray-300',
    };

    const disabledClasses = tab.disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer';

    return `${baseClasses} ${sizeClasses[size]} ${variantClasses[variant]} ${disabledClasses}`;
  };

  const getContainerClasses = () => {
    const baseClasses = 'flex overflow-x-auto';
    
    const variantContainerClasses = {
      default: 'space-x-1 border-b border-gray-100 bg-gradient-to-r from-gray-50 to-white px-4',
      pills: 'space-x-2 p-1 bg-gray-100 rounded-lg',
      underline: 'space-x-6 border-b border-gray-200',
    };

    return `${baseClasses} ${variantContainerClasses[variant]} ${className}`;
  };

  return (
    <nav className={getContainerClasses()}>
      {tabs.map((tab) => {
        const Icon = tab.icon;
        const isActive = activeTab === tab.id;

        return (
          <button
            key={tab.id}
            onClick={() => !tab.disabled && onTabChange(tab.id)}
            className={getTabClasses(tab, isActive)}
            disabled={tab.disabled}
            type="button"
          >
            {Icon && (
              <Icon 
                className={`w-4 h-4 transition-all duration-200 ${
                  isActive ? 'text-primary-600' : 'text-gray-400'
                }`} 
              />
            )}
            <span className="whitespace-nowrap">{tab.label}</span>
            {tab.count !== undefined && (
              <span className={`inline-flex items-center justify-center px-2 py-0.5 rounded-full text-xs font-medium ${
                isActive 
                  ? 'bg-primary-200 text-primary-800' 
                  : 'bg-gray-200 text-gray-600'
              }`}>
                {tab.count}
              </span>
            )}
            {isActive && variant === 'default' && (
              <div className="absolute inset-0 bg-gradient-to-r from-primary-50/30 to-primary-100/30 rounded-t-lg -z-10"></div>
            )}
          </button>
        );
      })}
    </nav>
  );
};

// 预设的选项卡样式
export const TabNavigationPresets = {
  // 默认样式 - 适用于页面主要导航
  default: {
    variant: 'default' as const,
    size: 'md' as const,
  },
  
  // 药丸样式 - 适用于紧凑的选项切换
  pills: {
    variant: 'pills' as const,
    size: 'sm' as const,
  },
  
  // 下划线样式 - 适用于简洁的导航
  underline: {
    variant: 'underline' as const,
    size: 'md' as const,
  },
  
  // 大尺寸 - 适用于重要的页面导航
  large: {
    variant: 'default' as const,
    size: 'lg' as const,
  },
};