"use client"
import React, { memo, useCallback } from "react"
import type { FamilyMember } from "@/types/family"
import { FamilyNode } from "./family-node"

interface TreeNodeProps {
  member: FamilyMember
  spouses: FamilyMember[]
  children: FamilyMember[]
  isRoot: boolean
  isHighlighted: boolean
  highlightedMemberId?: string | null
  relationMode: boolean
  isSelected: boolean
  selectedMembers: string[]
  canEdit: boolean
  hasChildren: boolean
  isCollapsed: boolean
  collapsedNodes: Set<string>
  onNodeClick: (member: FamilyMember) => void
  onAddRelation: (member: FamilyMember, type: "child" | "spouse") => void
  onToggleCollapse: (memberId: string) => void
  onNodeRef: (memberId: string, el: HTMLDivElement | null) => void
  getMember: (id: string) => FamilyMember | undefined
  sortedChildrenMap: Map<string, string[]>
  horizontalGap: number
  verticalGap: number
}

// 独立的树节点组件，使用 memo 优化渲染
export const TreeNode = memo(function TreeNode({
  member,
  spouses,
  children,
  isRoot,
  isHighlighted,
  highlightedMemberId,
  relationMode,
  isSelected,
  selectedMembers,
  canEdit,
  hasChildren,
  isCollapsed,
  collapsedNodes,
  onNodeClick,
  onAddRelation,
  onToggleCollapse,
  onNodeRef,
  getMember,
  sortedChildrenMap,
  horizontalGap,
  verticalGap,
}: TreeNodeProps) {
  
  const handleToggleCollapse = useCallback(() => {
    onToggleCollapse(member.id)
  }, [member.id, onToggleCollapse])

  const handleAddRelation = useCallback((type: "child" | "spouse") => {
    onAddRelation(member, type)
  }, [member, onAddRelation])

  // 处理成员点击，接收被点击的成员（可能是主成员或配偶）
  const handleSelect = useCallback((clickedMember: FamilyMember) => {
    onNodeClick(clickedMember)
  }, [onNodeClick])

  const handleRef = useCallback((el: HTMLDivElement | null) => {
    onNodeRef(member.id, el)
  }, [member.id, onNodeRef])

  // 计算可见的子节点
  const visibleChildren = hasChildren && !isCollapsed
    ? (sortedChildrenMap.get(member.id) || [])
        .map(childId => getMember(childId))
        .filter((child): child is FamilyMember => child !== undefined)
    : []

  return (
    <div className="flex flex-col items-center">
      {/* 节点本身 */}
      <div ref={handleRef} className="relative z-10">
        <FamilyNode 
          member={member} 
          spouses={spouses} 
          onSelect={handleSelect} 
          isRoot={isRoot}
          isHighlighted={isHighlighted}
          highlightedMemberId={highlightedMemberId}
          relationMode={relationMode}
          isSelected={isSelected}
          selectedMembers={selectedMembers}
          canEdit={canEdit}
          onAddRelation={handleAddRelation}
          hasChildren={hasChildren}
          isCollapsed={isCollapsed}
          onToggleCollapse={handleToggleCollapse}
        />
      </div>

      {/* 子节点 - 只在未折叠时显示 */}
      {visibleChildren.length > 0 && (
        <div 
          className="flex items-start relative"
          style={{ 
            marginTop: `${verticalGap}px`,
            gap: `${horizontalGap}px`
          }}
        >
          {visibleChildren.map((child) => {
            const childSpouses = child.spouseIds && child.spouseIds.length > 0 
              ? child.spouseIds.map(id => getMember(id)).filter((s): s is FamilyMember => s !== undefined)
              : []
            const childHasChildren = child.childrenIds && child.childrenIds.length > 0
            const childChildren = childHasChildren
              ? (sortedChildrenMap.get(child.id) || [])
                  .map(id => getMember(id))
                  .filter((c): c is FamilyMember => c !== undefined)
              : []
            
            return (
              <TreeNode
                key={child.id}
                member={child}
                spouses={childSpouses}
                children={childChildren}
                isRoot={false}
                isHighlighted={child.id === highlightedMemberId}
                highlightedMemberId={highlightedMemberId}
                relationMode={relationMode}
                isSelected={selectedMembers.includes(child.id)}
                selectedMembers={selectedMembers}
                canEdit={canEdit}
                hasChildren={childHasChildren || false}
                isCollapsed={collapsedNodes.has(child.id)}
                collapsedNodes={collapsedNodes}
                onNodeClick={onNodeClick}
                onAddRelation={onAddRelation}
                onToggleCollapse={onToggleCollapse}
                onNodeRef={onNodeRef}
                getMember={getMember}
                sortedChildrenMap={sortedChildrenMap}
                horizontalGap={horizontalGap}
                verticalGap={verticalGap}
              />
            )
          })}
        </div>
      )}
    </div>
  )
})