import { memo } from 'react'
import { ArrowRight, Check, ClipboardList, Circle } from 'lucide-react'
import { cn } from '@/utils/cn'
import { useNovaKit } from '../../context/useNovaKit'

export interface TodoItem {
  id?: string | number
  title?: string
  status?: 'pending' | 'completed' | 'in_progress' | string
  [key: string]: unknown
}

export interface TodoListProps {
  items: TodoItem[]
  className?: string
}

function TodoListComponent({ items = [], className }: TodoListProps) {
  const { agentName } = useNovaKit()
  const todoItems = items
  const totalCount = todoItems.length
  const completedCount = todoItems.filter(item => item.status === 'completed').length
  const isAllCompleted = totalCount > 0 && completedCount === totalCount
  const displayCompletedCount =
    totalCount === 0
      ? 0
      : Math.min(totalCount, isAllCompleted ? completedCount : completedCount + 1)
  const progressRatio =
    totalCount === 0
      ? 0
      : displayCompletedCount / totalCount
  const progressPercent = Math.max(0, Math.min(100, progressRatio * 100))

  return (
    <div
      className={cn(
        'relative my-1 mb-4 max-w-3xl overflow-hidden rounded-xl border border-gray-200 bg-white',
        className,
      )}
    >
      {/* Header：任务执行流水线 */}
      <div className="flex items-center justify-between bg-gray-50 border-b border-gray-100 px-3 py-[5px]">
        <div className="flex min-w-0 flex-1 items-center gap-2">
          <div className="flex h-4 w-4 flex-none items-center justify-center text-muted-foreground">
            <ClipboardList className="h-4 w-4" />
          </div>
          <div className="min-w-0">
            <h2 className="truncate text-[14px] leading-[22px] text-foreground">
              任务执行流水线
            </h2>
            <p className="truncate text-[12px] text-muted-foreground">{agentName}</p>
          </div>
        </div>
        <div className="flex items-center gap-1 pl-3">
          <span className="text-[12px] font-medium text-muted-foreground">Progress</span>
          <span className="text-[12px] font-medium text-muted-foreground">
            {displayCompletedCount} / {totalCount || 0}
          </span>
        </div>
      </div>

      {/* 列表内容：卡片列表布局 */}
      <div className="relative overflow-hidden transition-all duration-200 ease-in-out">
        <div className="relative overflow-visible bg-white px-3 py-2.5">
          <div className="absolute left-0 top-0 h-[2px] w-full bg-border/70">
            <div
              className="h-full bg-primary transition-all duration-700"
              style={{ width: `${progressPercent}%` }}
            />
          </div>

          <div className="flex flex-col pt-1">
            {todoItems.map((item, index) => {
              const status = item.status as string | undefined
              const isCompleted = status === 'completed'
              const isActive = status === 'in_progress'
              const isPending = !isCompleted && !isActive
              const stepLabel = `STEP ${index + 1} OF ${totalCount || 0}`

              return (
                <div
                  key={(item.id as string) ?? index}
                  className={cn(
                    'flex items-center justify-between gap-3 py-1',
                    isCompleted && 'opacity-70',
                    isPending && 'opacity-60',
                  )}
                >
                  {/* 左侧：状态圆点 + 文案 */}
                  <div className="flex min-w-0 flex-1 items-center gap-2">
                    {/* 状态圆点 */}
                    <div className="relative flex flex-none items-center justify-center">
                      {isCompleted && (
                        <div className="flex h-4 w-4 items-center justify-center rounded-full bg-primary">
                          <Check className="h-2.5 w-2.5 text-white" />
                        </div>
                      )}
                      {isActive && (
                        <div className="flex h-4 w-4 items-center justify-center rounded-full bg-primary/12 text-primary">
                          <ArrowRight className="h-2.5 w-2.5" />
                        </div>
                      )}
                      {isPending && !isCompleted && !isActive && (
                        <div className="flex h-4 w-4 items-center justify-center rounded-full border border-gray-200 bg-white">
                          <Circle className="h-2.5 w-2.5 text-muted-foreground/55" />
                        </div>
                      )}
                    </div>

                    {/* 文案 */}
                    <div className="min-w-0 space-y-0.5">
                      <p
                        className={cn(
                          'truncate text-[14px] leading-[22px] font-normal',
                          isActive
                            ? 'text-foreground'
                            : 'text-muted-foreground',
                          isCompleted && 'line-through decoration-border',
                        )}
                      >
                        {item.title as string}
                      </p>
                      {typeof (item as any).description === 'string' && (
                        <p className="truncate text-[12px] text-muted-foreground">
                          {(item as any).description as string}
                        </p>
                      )}
                    </div>
                    {isActive && (
                      <span className="h-1 w-1 flex-none rounded-full bg-primary animate-pulse" />
                    )}
                  </div>

                  {/* 右侧：步骤标签 */}
                  <span
                    className={cn(
                      'flex-none text-[10px] font-mono font-medium tracking-tight',
                      isActive
                        ? 'text-primary'
                        : 'text-muted-foreground',
                    )}
                  >
                    {stepLabel}
                  </span>
                </div>
              )
            })}
          </div>
        </div>
      </div>
    </div>
  )
}

export const TodoList = memo(TodoListComponent)
export default TodoList