/**
 * TabItem — local shell shows zsh/bash badge like professional terminal UIs
 */

import { X, Terminal, FolderSync, Cable, Crown, TerminalSquare } from 'lucide-react'
import type { Tab } from '../../../stores/tabStore'

interface TabItemProps {
  tab: Tab
  index: number
  isActive: boolean
  isDragging: boolean
  dragOverIndex: number | null
  onActivate: () => void
  onClose: (e: React.MouseEvent) => void
  onContextMenu: (e: React.MouseEvent) => void
  onDragStart: (e: React.DragEvent, index: number) => void
  onDragOver: (e: React.DragEvent, index: number) => void
  onDrop: (e: React.DragEvent, index: number) => void
  onDragEnd: () => void
}

function LocalShellBadge({ kind }: { kind?: string }) {
  const k = (kind || 'unknown').toLowerCase()
  if (k === 'zsh') {
    return (
      <span
        className="inline-flex items-center justify-center w-6 h-6 rounded-md bg-teal-800/90 text-[8px] font-bold text-teal-100 flex-shrink-0 border border-teal-600/40"
        title="Zsh"
      >
        zsh
      </span>
    )
  }
  if (k === 'bash') {
    return (
      <span
        className="inline-flex items-center justify-center w-6 h-6 rounded-md bg-dark-600 text-emerald-400 flex-shrink-0 border border-dark-500"
        title="Bash"
      >
        <span className="text-[11px] font-bold leading-none">$_</span>
      </span>
    )
  }
  if (k === 'fish') {
    return (
      <span
        className="inline-flex items-center justify-center w-6 h-6 rounded-md bg-violet-800 text-[8px] font-bold text-violet-100 flex-shrink-0"
        title="Fish"
      >
        fi
      </span>
    )
  }
  return (
    <span className="inline-flex items-center justify-center w-6 h-6 rounded-md bg-dark-600 text-[9px] font-bold text-content-secondary flex-shrink-0">
      sh
    </span>
  )
}

export function TabItem({
  tab,
  index,
  isActive,
  isDragging,
  dragOverIndex,
  onActivate,
  onClose,
  onContextMenu,
  onDragStart,
  onDragOver,
  onDrop,
  onDragEnd,
}: TabItemProps) {
  const isLocalTerm = tab.type === 'terminal' && tab.isLocal

  const getIcon = () => {
    if (isLocalTerm) {
      return <LocalShellBadge kind={tab.localShellKind} />
    }
    switch (tab.type) {
      case 'terminal':
        return <Terminal className={`w-3.5 h-3.5 ${isActive ? 'text-accent-blue' : ''}`} />
      case 'sftp':
        return <FolderSync className={`w-3.5 h-3.5 ${isActive ? 'text-accent-purple' : ''}`} />
      case 'serial':
        return <Cable className={`w-3.5 h-3.5 ${isActive ? 'text-accent-green' : ''}`} />
      case 'upgrade':
        return <Crown className={`w-3.5 h-3.5 ${isActive ? 'text-accent-blue' : ''}`} />
      case 'batch':
        return <TerminalSquare className={`w-3.5 h-3.5 ${isActive ? 'text-accent-blue' : ''}`} />
      default:
        return null
    }
  }

  const showLeftIndicator = dragOverIndex === index && !isDragging
  const showRightIndicator = dragOverIndex === index + 1 && !isDragging

  return (
    <div
      data-tab-item
      draggable
      onClick={onActivate}
      onContextMenu={onContextMenu}
      onDragStart={(e) => onDragStart(e, index)}
      onDragOver={(e) => onDragOver(e, index)}
      onDrop={(e) => onDrop(e, index)}
      onDragEnd={onDragEnd}
      className={`
        group flex items-center gap-2 px-3 py-2 min-w-[120px] max-w-[220px]
        border-r border-dark-700/20 cursor-pointer select-none
        transition-all duration-150 relative titlebar-no-drag
        ${isActive
          ? 'bg-dark-900 text-content-primary'
          : 'bg-dark-800 text-txt-muted hover:bg-dark-700 hover:text-txt-muted'
        }
        ${isDragging ? 'opacity-50' : 'opacity-100'}
      `}
    >
      {showLeftIndicator && (
        <div className="absolute left-0 top-0 bottom-0 w-0.5 bg-accent-blue z-10" />
      )}
      {showRightIndicator && (
        <div className="absolute right-0 top-0 bottom-0 w-0.5 bg-accent-blue z-10" />
      )}

      {isLocalTerm ? (
        <>
          {getIcon()}
          {tab.connectionStatus === 'connected' && (
            <span className="w-1.5 h-1.5 rounded-full bg-green-500 flex-shrink-0" />
          )}
          {tab.connectionStatus === 'connecting' && (
            <span className="w-1.5 h-1.5 rounded-full bg-yellow-400 animate-pulse flex-shrink-0" />
          )}
          {tab.connectionStatus === 'error' && (
            <span className="w-1.5 h-1.5 rounded-full bg-red-500 flex-shrink-0" />
          )}
        </>
      ) : (
        <>
          {tab.connectionStatus === 'connecting' && (
            <span className="w-2 h-2 rounded-full bg-yellow-500 animate-pulse" />
          )}
          {tab.connectionStatus === 'connected' && (
            <span className="w-2 h-2 rounded-full bg-green-500" />
          )}
          {tab.connectionStatus === 'error' && (
            <span className="w-2 h-2 rounded-full bg-red-500" />
          )}
          {getIcon()}
        </>
      )}

      <span className="flex-1 truncate text-sm font-medium">{tab.title}</span>

      <button
        onClick={onClose}
        className={`
          p-0.5 rounded opacity-0 group-hover:opacity-100
          hover:bg-dark-600 transition-opacity
          ${isActive ? 'opacity-100' : ''}
        `}
      >
        <X className="w-3.5 h-3.5" />
      </button>

      <div
        className={`
          absolute bottom-0 left-0 right-0 h-0.5 bg-accent-blue
          transition-[opacity,transform] duration-150 origin-left
          ${isActive ? 'opacity-100 scale-x-100' : 'opacity-0 scale-x-0'}
        `}
      />
    </div>
  )
}