import type * as React from 'react'

import { Button } from '@/components/ui/button'
import { Codicon } from '@/components/ui/codicon'
import type { SessionInfo } from '@/hermes'
import { sessionTitle } from '@/lib/chat-runtime'
import { triggerHaptic } from '@/lib/haptics'
import { cn } from '@/lib/utils'

import { SessionActionsMenu } from './session-actions-menu'

const SECOND = 1000
const MINUTE = 60 * SECOND
const HOUR = 60 * MINUTE
const DAY = 24 * HOUR

interface SidebarSessionRowProps extends React.ComponentProps<'div'> {
  session: SessionInfo
  isPinned: boolean
  isSelected: boolean
  isWorking: boolean
  onDelete: () => void
  onPin: () => void
  onResume: () => void
  reorderable?: boolean
  dragging?: boolean
  dragHandleProps?: React.HTMLAttributes<HTMLElement>
}

function formatAge(seconds: number): string {
  const at = seconds * 1000
  const delta = Math.max(0, Date.now() - at)

  if (delta < MINUTE) {
    return 'now'
  }

  if (delta < HOUR) {
    return `${Math.floor(delta / MINUTE)}m`
  }

  if (delta < DAY) {
    return `${Math.floor(delta / HOUR)}h`
  }

  return `${Math.floor(delta / DAY)}d`
}

export function SidebarSessionRow({
  session,
  isPinned,
  isSelected,
  isWorking,
  onDelete,
  onPin,
  onResume,
  reorderable = false,
  dragging = false,
  dragHandleProps,
  className,
  style,
  ref,
  ...rest
}: SidebarSessionRowProps) {
  const title = sessionTitle(session)
  const age = formatAge(session.last_active || session.started_at)
  const handleLabel = `Reorder ${title}`

  return (
    <div
      className={cn(
        'group relative grid min-h-[1.625rem] cursor-pointer grid-cols-[minmax(0,1fr)_1.375rem] items-center rounded-md transition-colors duration-100 ease-out hover:bg-(--ui-bg-quinary) hover:transition-none',
        isSelected && 'bg-(--ui-bg-tertiary)',
        isWorking && 'text-foreground',
        dragging && 'z-10 cursor-grabbing opacity-60 shadow-sm',
        className
      )}
      data-working={isWorking ? 'true' : undefined}
      ref={ref}
      style={style}
      {...rest}
    >
      <button
        className="z-0 flex min-w-0 cursor-pointer items-center gap-1.5 bg-transparent py-0.5 pl-2 pr-1 text-left group-hover:pr-12"
        onClick={event => {
          if (event.shiftKey) {
            event.preventDefault()
            event.stopPropagation()
            triggerHaptic('selection')
            onPin()

            return
          }

          onResume()
        }}
        type="button"
      >
        {reorderable ? (
          <span
            {...dragHandleProps}
            aria-label={handleLabel}
            className="relative -my-0.5 grid w-4 shrink-0 cursor-grab touch-none place-items-center self-stretch overflow-hidden active:cursor-grabbing"
            onClick={event => event.stopPropagation()}
          >
            <SidebarRowDot
              className="transition-opacity group-hover:opacity-0 group-focus-within:opacity-0"
              isWorking={isWorking}
            />
            <Codicon
              className={cn(
                'absolute text-(--ui-text-quaternary) opacity-0 transition-opacity group-hover:opacity-80 group-focus-within:opacity-80 hover:text-(--ui-text-secondary)',
                dragging && 'text-(--ui-text-secondary) opacity-100'
              )}
              name="grabber"
              size="0.75rem"
            />
          </span>
        ) : (
          <span className="grid w-3.5 shrink-0 place-items-center overflow-hidden">
            <SidebarRowDot isWorking={isWorking} />
          </span>
        )}
        <span className="truncate text-[0.8125rem] font-normal text-(--ui-text-secondary) group-hover:text-foreground group-data-[working=true]:text-foreground/90">
          {title}
        </span>
      </button>
      <div className="relative z-2 grid w-[1.375rem] place-items-center">
        {!isWorking && (
          <span className="pointer-events-none absolute right-6 top-1/2 min-w-6 -translate-y-1/2 text-right text-[0.625rem] leading-none text-(--ui-text-tertiary) opacity-0 transition-opacity group-hover:opacity-100">
            {age}
          </span>
        )}
        <SessionActionsMenu onDelete={onDelete} onPin={onPin} pinned={isPinned} sessionId={session.id} title={title}>
          <Button
            aria-label={`Actions for ${title}`}
            className="size-5 rounded-md bg-transparent text-transparent transition-colors duration-100 hover:bg-(--ui-bg-tertiary) hover:text-foreground focus-visible:bg-(--ui-bg-tertiary) focus-visible:text-foreground focus-visible:ring-0 data-[state=open]:bg-(--ui-bg-tertiary) data-[state=open]:text-foreground group-hover:text-(--ui-text-tertiary) [&_svg]:size-3.5!"
            size="icon"
            title="Session actions"
            variant="ghost"
          >
            <Codicon name="ellipsis" size="0.875rem" />
          </Button>
        </SessionActionsMenu>
      </div>
    </div>
  )
}

function SidebarRowDot({ isWorking, className }: { isWorking: boolean; className?: string }) {
  return (
    <span
      aria-label={isWorking ? 'Session running' : undefined}
      className={cn(
        'rounded-full',
        isWorking ? 'size-1.5 bg-(--ui-green)' : 'size-1 bg-(--ui-text-quaternary) opacity-80',
        className
      )}
      role={isWorking ? 'status' : undefined}
    />
  )
}