import { NextRequest, NextResponse } from "next/server"
import { getServerSession } from "next-auth"
import { authOptions } from "@/lib/auth"
import { prisma } from "@/lib/prisma"
import { checkPermission } from "@/lib/permissions"

// 获取成员的历史版本
export async function GET(
  req: NextRequest,
  { params }: { params: Promise<{ treeId: string; memberId: string }> }
) {
  try {
    const session = await getServerSession(authOptions)
    
    if (!session?.user?.id) {
      return NextResponse.json({ error: "未授权" }, { status: 401 })
    }

    const { treeId, memberId } = await params

    // 检查权限
    const { hasPermission } = await checkPermission(session.user.id, treeId)
    if (!hasPermission) {
      return NextResponse.json({ error: "无权访问此家族树" }, { status: 403 })
    }

    // 获取成员历史记录
    const historyRecords = await prisma.memberHistory.findMany({
      where: {
        memberId,
        treeId,
      },
      orderBy: {
        version: 'desc',
      },
    })

    // 获取所有相关用户ID
    const userIds = [...new Set(historyRecords.map(h => h.changedBy))]
    
    // 批量获取用户信息
    const users = await prisma.user.findMany({
      where: {
        id: {
          in: userIds
        }
      },
      select: {
        id: true,
        name: true,
        email: true,
      }
    })

    // 创建用户映射
    const userMap = new Map(users.map(u => [u.id, u]))

    // 组合历史记录和用户信息
    const history = historyRecords.map(record => ({
      ...record,
      user: userMap.get(record.changedBy) || null
    }))

    return NextResponse.json({ history })
  } catch (error) {
    console.error("获取成员历史失败:", error)
    return NextResponse.json(
      { error: "获取成员历史失败" },
      { status: 500 }
    )
  }
}