/**
 * Tag 组件
 * 
 * 统一的标签组件，适合后台筛选与分类展示
 * 用于显示分类、类型等标签信息
 * 支持少量语义色和尺寸（xs、sm、md、lg）
 * 支持点击事件，可用于筛选等功能
 * 
 * @created 2025-11-22
 * @updated 2026-05-25 - 收敛为后台工作台风格
 * @component
 */

'use client'

import { ReactNode } from 'react'
import { useThemeStyles, cn } from '@/lib/ui-styles'

interface TagProps {
  children: ReactNode
  color?: 'blue' | 'green' | 'orange' | 'purple' | 'indigo' | 'pink' | 'cyan'
  size?: 'xs' | 'sm' | 'md' | 'lg'
  className?: string
  onClick?: () => void
  selected?: boolean
}

export default function Tag({
  children,
  color = 'blue',
  size = 'md',
  className = '',
  onClick,
  selected = false,
}: TagProps) {
  useThemeStyles()

  const colorClasses: Record<NonNullable<TagProps['color']>, string> = {
    blue: selected
      ? 'bg-slate-900 dark:bg-slate-100 text-white dark:text-slate-950 border-slate-900 dark:border-slate-100'
      : 'bg-white dark:bg-slate-900 text-slate-700 dark:text-slate-200 border-slate-300 dark:border-slate-700 hover:bg-slate-50 dark:hover:bg-slate-800',
    green: selected
      ? 'bg-emerald-700 dark:bg-emerald-500 text-white border-emerald-700 dark:border-emerald-500'
      : 'bg-emerald-50 dark:bg-emerald-950/30 text-emerald-800 dark:text-emerald-200 border-emerald-200 dark:border-emerald-800 hover:bg-emerald-100 dark:hover:bg-emerald-950/50',
    orange: selected
      ? 'bg-amber-700 dark:bg-amber-500 text-white dark:text-slate-950 border-amber-700 dark:border-amber-500'
      : 'bg-amber-50 dark:bg-amber-950/30 text-amber-800 dark:text-amber-200 border-amber-200 dark:border-amber-800 hover:bg-amber-100 dark:hover:bg-amber-950/50',
    purple: selected
      ? 'bg-slate-700 dark:bg-slate-200 text-white dark:text-slate-950 border-slate-700 dark:border-slate-200'
      : 'bg-slate-50 dark:bg-slate-900 text-slate-700 dark:text-slate-200 border-slate-300 dark:border-slate-700 hover:bg-slate-100 dark:hover:bg-slate-800',
    indigo: selected
      ? 'bg-slate-700 dark:bg-slate-200 text-white dark:text-slate-950 border-slate-700 dark:border-slate-200'
      : 'bg-slate-50 dark:bg-slate-900 text-slate-700 dark:text-slate-200 border-slate-300 dark:border-slate-700 hover:bg-slate-100 dark:hover:bg-slate-800',
    pink: selected
      ? 'bg-slate-700 dark:bg-slate-200 text-white dark:text-slate-950 border-slate-700 dark:border-slate-200'
      : 'bg-slate-50 dark:bg-slate-900 text-slate-700 dark:text-slate-200 border-slate-300 dark:border-slate-700 hover:bg-slate-100 dark:hover:bg-slate-800',
    cyan: selected
      ? 'bg-slate-700 dark:bg-slate-200 text-white dark:text-slate-950 border-slate-700 dark:border-slate-200'
      : 'bg-slate-50 dark:bg-slate-900 text-slate-700 dark:text-slate-200 border-slate-300 dark:border-slate-700 hover:bg-slate-100 dark:hover:bg-slate-800',
  }

  const sizeClasses = {
    xs: 'px-2.5 py-0.5 text-[11px] font-medium',
    sm: 'px-3 py-1 text-xs font-medium',
    md: 'px-4 py-1.5 text-sm font-medium',
    lg: 'px-5 py-2 text-base font-medium',
  } as const

  const baseClasses = cn(
    'inline-flex items-center justify-center',
    'rounded-md border',
    'transition-colors duration-200 ease-out',
    onClick && 'cursor-pointer'
  )

  return (
    <span
      className={cn(
        baseClasses,
        colorClasses[color],
        sizeClasses[size],
        className
      )}
      onClick={onClick}
    >
      {children}
    </span>
  )
}