/**
 * TabItem — local shell uses the same Terminal icon as the launcher (+)
 */

import { X, Terminal, FolderSync, Cable, Crown, TerminalSquare } from 'lucide-react'
import { useTranslation } from 'react-i18next'
import type { Tab } from '../../../stores/tabStore'
import { useSessionStore } from '../../../stores/sessionStore'
import HostDistroIcon from '../../common/HostDistroIcon'
import { resolveTabTitle } from '../../../utils/tabTitle'

interface TabItemProps {
  tab: Tab
  index: number
  isActive: boolean
  isDragging: boolean
  dragOverIndex: number | null
  onActivate: () => void
  onClose: (e: { stopPropagation(): void }) => 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
}

export function TabItem({
  tab,
  index,
  isActive,
  isDragging,
  dragOverIndex,
  onActivate,
  onClose,
  onContextMenu,
  onDragStart,
  onDragOver,
  onDrop,
  onDragEnd,
}: TabItemProps) {
  const { t } = useTranslation(['terminal', 'common'])
  const displayTitle = resolveTabTitle(tab)
  const isLocalTerm = tab.type === 'terminal' && tab.isLocal
  const session = useSessionStore((state) =>
    tab.sessionId ? state.sessions.find((item) => item.id === tab.sessionId) : undefined
  )

  const getIcon = () => {
    if (isLocalTerm) {
      return (
        <Terminal
          className={`h-3.5 w-3.5 flex-shrink-0 ${isActive ? 'text-accent-green' : 'text-accent-green/70'}`}
          aria-label={t('toolbar.labelLocal')}
        />
      )
    }
    if (tab.type === 'rdp' || tab.type === 'vnc' || (tab.type === 'terminal' && session)) {
      return (
        <HostDistroIcon
          distro={
            session?.distro ??
            (tab.type === 'rdp' ? 'windows' : tab.type === 'vnc' ? 'vnc' : undefined)
          }
          protocol={
            tab.type === 'rdp' ? 'rdp' : tab.type === 'vnc' ? 'vnc' : session?.protocol ?? 'ssh'
          }
          size="xs"
        />
      )
    }
    switch (tab.type) {
      case 'terminal':
        return <Terminal className={`h-3.5 w-3.5 ${isActive ? 'text-accent-blue' : ''}`} />
      case 'sftp':
        return <FolderSync className={`h-3.5 w-3.5 ${isActive ? 'text-accent-purple' : ''}`} />
      case 'serial':
        return <Cable className={`h-3.5 w-3.5 ${isActive ? 'text-accent-green' : ''}`} />
      case 'upgrade':
        return <Crown className={`h-3.5 w-3.5 ${isActive ? 'text-accent-blue' : ''}`} />
      case 'batch':
        return <TerminalSquare className={`h-3.5 w-3.5 ${isActive ? 'text-accent-blue' : ''}`} />
      default:
        return null
    }
  }

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

  const statusDot =
    tab.connectionStatus === 'connecting' ? (
      <span className="h-1.5 w-1.5 flex-shrink-0 animate-pulse rounded-full bg-yellow-400" />
    ) : tab.connectionStatus === 'connected' ? (
      <span className="h-1.5 w-1.5 flex-shrink-0 rounded-full bg-green-500" />
    ) : tab.connectionStatus === 'error' ? (
      <span className="h-1.5 w-1.5 flex-shrink-0 rounded-full bg-red-500" />
    ) : null

  return (
    <div
      data-tab-item
      role="tab"
      aria-selected={isActive}
      tabIndex={0}
      draggable
      onClick={onActivate}
      onAuxClick={(e) => {
        if (e.button === 1) {
          e.preventDefault()
          e.stopPropagation()
          onClose(e)
        }
      }}
      onKeyDown={(e) => {
        if (e.key === 'Enter' || e.key === ' ') {
          e.preventDefault()
          onActivate()
        }
        if (e.key === 'Delete') {
          e.preventDefault()
          onClose(e)
        }
      }}
      onContextMenu={onContextMenu}
      onDragStart={(e) => onDragStart(e, index)}
      onDragOver={(e) => onDragOver(e, index)}
      onDrop={(e) => onDrop(e, index)}
      onDragEnd={onDragEnd}
      className={`
        group relative flex min-w-[120px] max-w-[220px] cursor-pointer select-none items-center gap-2
        border-r border-dark-700/20 px-3 py-2 titlebar-no-drag transition-all duration-150
        ${
          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 bottom-0 left-0 top-0 z-10 w-0.5 bg-accent-blue" />
      )}
      {showRightIndicator && (
        <div className="absolute bottom-0 right-0 top-0 z-10 w-0.5 bg-accent-blue" />
      )}

      {statusDot}
      {getIcon()}

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

      <button
        type="button"
        onClick={onClose}
        aria-label={t('common:tab.closeAria', { title: displayTitle })}
        className={`
          rounded p-0.5 opacity-0 transition-opacity hover:bg-dark-600
          group-hover:opacity-100 group-focus-within:opacity-100 focus-visible:opacity-100
          ${isActive ? 'opacity-100' : ''}
        `}
      >
        <X className="h-3.5 w-3.5" />
      </button>

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