import { FileItem } from '@/lib/api'
import { X } from 'lucide-react'
import { clsx } from 'clsx'
import { useWallpaper } from '@/stores'
import { useEffect, useRef, useState } from 'react'
import { ContextMenu } from '@/components/common/ContextMenu'
import { getModuleTabId } from '@/lib/module-registry'

const HOME_TAB_ID = getModuleTabId('home') ?? 'home-tab'

export interface TabBarProps {
  openFiles: FileItem[]
  activeFile: FileItem | null
  onTabClick: (file: FileItem) => void
  onTabClose: (file: FileItem, e: React.MouseEvent) => void
  onCloseOther?: (file: FileItem) => void
  onCloseAll?: () => void
  onPopOut?: (file: FileItem) => void
  className?: string
  style?: React.CSSProperties
  variant?: 'default' | 'titlebar'
}

export const TabBar = ({ openFiles, activeFile, onTabClick, onTabClose, onCloseOther, onCloseAll, onPopOut, className, style, variant = 'default' }: TabBarProps) => {
  const scrollContainerRef = useRef<HTMLDivElement>(null)
  const { opacity } = useWallpaper()
  const [contextMenu, setContextMenu] = useState<{
    isOpen: boolean
    position: { x: number; y: number }
    file: FileItem | null
  }>({
    isOpen: false,
    position: { x: 0, y: 0 },
    file: null
  })

  const handleContextMenu = (e: React.MouseEvent, file: FileItem) => {
    e.preventDefault()
    e.stopPropagation()
    setContextMenu({
      isOpen: true,
      position: { x: e.clientX, y: e.clientY },
      file
    })
  }

  const handleCloseContextMenu = () => {
    setContextMenu(prev => ({ ...prev, isOpen: false }))
  }

  const handleCloseOther = () => {
    if (contextMenu.file && onCloseOther) {
      onCloseOther(contextMenu.file)
    }
    handleCloseContextMenu()
  }

  const handleCloseAll = () => {
    if (onCloseAll) {
      onCloseAll()
    }
    handleCloseContextMenu()
  }

  const handlePopOut = () => {
    if (contextMenu.file && onPopOut) {
      onPopOut(contextMenu.file)
    }
    handleCloseContextMenu()
  }

  const isHomeTab = contextMenu.file?.path === HOME_TAB_ID
  const contextMenuItems = [
    ...(!isHomeTab ? [{ label: '在新窗口中打开', onClick: handlePopOut }] : []),
    { label: '关闭其他标签页', onClick: handleCloseOther },
    { label: '关闭所有标签页', onClick: handleCloseAll }
  ]

  useEffect(() => {
    if (activeFile && scrollContainerRef.current) {
      const activeTab = scrollContainerRef.current.querySelector('[data-active="true"]')
      if (activeTab) {
        activeTab.scrollIntoView({ behavior: 'smooth', block: 'nearest', inline: 'nearest' })
      }
    }
  }, [activeFile?.path, openFiles.length])

  if (openFiles.length === 0) return null

  const isTitlebar = variant === 'titlebar'

  return (
    <div
      ref={scrollContainerRef}
      className={clsx(
        isTitlebar
          ? "flex overflow-hidden"
          : "flex backdrop-blur-sm border-b border-gray-200 dark:border-gray-700/60 overflow-hidden",
        className
      )}
      style={{
        backgroundColor: isTitlebar ? 'transparent' : `rgba(var(--app-tabbar-bg-rgb), ${opacity})`,
        '--tab-opacity': opacity,
        ...style
      } as React.CSSProperties}
    >
      {openFiles.map((file) => {
        const isActive = activeFile?.path === file.path
        const isOnlyHomeTab = openFiles.length === 1 && file.path === HOME_TAB_ID
        return (
          <div
            key={file.path}
            data-active={isActive}
            onClick={() => onTabClick(file)}
            onContextMenu={(e) => handleContextMenu(e, file)}
            className={clsx(
              "group relative flex items-center px-3 min-w-[80px] max-w-[240px] text-sm cursor-pointer border-r border-gray-200 dark:border-gray-700/60 select-none rounded-t-md flex-1 titlebar-no-drag",
              isTitlebar ? "h-full" : "h-10",
              isActive
                ? "backdrop-blur-md text-gray-800 dark:text-gray-200 font-medium border-t-2 border-t-gray-400 dark:border-t-gray-500"
                : "text-gray-600 dark:text-gray-300 hover:bg-gray-100/[var(--tab-opacity)] dark:hover:bg-gray-700/[var(--tab-opacity)] border-t-2 border-t-transparent"
            )}
            style={{
              backgroundColor: isActive
                ? `rgba(var(--app-tab-active-bg-rgb), ${opacity * 0.55})`
                : `rgba(var(--app-tab-inactive-bg-rgb), ${opacity * 0.65})`,
            }}
          >
            <span className={clsx(
              "w-full overflow-hidden whitespace-nowrap",
              !isOnlyHomeTab && "pr-4"
            )} style={{
              maskImage: 'linear-gradient(to right, black calc(100% - 20px), transparent 100%)',
              WebkitMaskImage: 'linear-gradient(to right, black calc(100% - 20px), transparent 100%)'
            }}>{file.name}</span>
            {!isOnlyHomeTab && (
              <button
                onClick={(e) => onTabClose(file, e)}
                className={clsx(
                  "absolute right-2 p-0.5 rounded-sm opacity-0 group-hover:opacity-100 transition-opacity bg-inherit",
                  isActive
                    ? "opacity-100 hover:bg-gray-100/[var(--tab-opacity)] dark:hover:bg-gray-700/[var(--tab-opacity)] text-gray-500 dark:text-gray-300"
                    : "hover:bg-gray-200/[var(--tab-opacity)] dark:hover:bg-gray-600/[var(--tab-opacity)] text-gray-400 dark:text-gray-400"
                )}
              >
                <X size={14} />
              </button>
            )}
          </div>
        )
      })}
      <ContextMenu
        items={contextMenuItems}
        isOpen={contextMenu.isOpen}
        position={contextMenu.position}
        onClose={handleCloseContextMenu}
      />
    </div>
  )
}