// 任务模块: 项目成员校验 (T-PM-01, B-13)
// 所有 /api/projects/:id/* 与任务写操作都必须确认请求者是项目成员.
import { prisma } from '../db.js'

/** 取出当前用户可访问的项目 (不存在或非成员 -> null) */
export async function loadProjectForUser(projectId, userId) {
  const id = Number(projectId)
  if (!Number.isInteger(id) || id <= 0) return null
  const project = await prisma.project.findFirst({
    where: { id, members: { some: { userId } } },
  })
  return project || null
}

/** 任务 -> 校验其项目可访问, 返回 { task, project } */
export async function loadTaskForUser(taskId, userId) {
  const id = Number(taskId)
  if (!Number.isInteger(id) || id <= 0) return null
  const task = await prisma.task.findFirst({
    where: { id, project: { members: { some: { userId } } } },
    include: {
      column: true,
      assignee: { select: { id: true, name: true } },
      creator: { select: { id: true, name: true } },
      members: { include: { user: { select: { id: true, name: true } } } },
      tags: true,
      children: {
        include: {
          column: true,
          assignee: { select: { id: true, name: true } },
          members: { include: { user: { select: { id: true, name: true } } } },
          tags: true,
        },
        orderBy: [{ sortOrder: 'asc' }, { id: 'asc' }],
      },
    },
  })
  if (!task) return null
  const project = await prisma.project.findUnique({ where: { id: task.projectId } })
  return { task, project }
}

/** 项目全部列 (按显示顺序) */
export async function loadColumns(projectId) {
  return prisma.boardColumn.findMany({
    where: { projectId: Number(projectId) },
    orderBy: [{ sortOrder: 'asc' }, { id: 'asc' }],
  })
}

/** 项目成员 userId 集合 */
export async function loadMemberIds(projectId) {
  const rows = await prisma.projectMember.findMany({
    where: { projectId: Number(projectId) },
    select: { userId: true },
  })
  return rows.map((r) => r.userId)
}