import { Prisma } from '@prisma/client'
import { prisma } from './prisma'
import {
  normalizeTaskDetailOnlyFlags,
  unionPermissionPacks,
  type MaterialPermissionFlags,
  type PermissionPackMap,
} from './organization-material-permissions'

function isMissingInheritTable(error: unknown) {
  return error instanceof Prisma.PrismaClientKnownRequestError && error.code === 'P2021'
}

export const DEFAULT_INHERIT_PACKS = [
  { slug: 'operations', name: '运营', sourceDepartment: '运营中心' },
  { slug: 'visual', name: '视觉', sourceDepartment: '视觉中心' },
] as const

export function packItemsToMap(
  items: Array<{
    materialType: string
    canView: boolean
    canDownload: boolean
    canDownloadSource: boolean
    canShare: boolean
    canEditAssets?: boolean
    canAccessPrivate?: boolean
  }>,
): PermissionPackMap {
  const pack: PermissionPackMap = {}
  for (const item of items) {
    const taskDetailOnlyFlags = normalizeTaskDetailOnlyFlags(item.materialType, item)
    pack[item.materialType] = {
      canView: item.canView,
      canDownload: item.canDownload,
      canDownloadSource: item.canDownloadSource,
      canShare: item.canShare,
      canEditAssets: taskDetailOnlyFlags.canEditAssets,
      canAccessPrivate: taskDetailOnlyFlags.canAccessPrivate,
    }
  }
  return pack
}

export async function ensureDefaultPermissionPacks() {
  for (const preset of DEFAULT_INHERIT_PACKS) {
    const pack = await prisma.materialPermissionPack.upsert({
      where: { slug: preset.slug },
      update: {},
      create: { slug: preset.slug, name: preset.name },
      select: { id: true, _count: { select: { items: true } } },
    })
    if (pack._count.items > 0) continue

    const sourceRows = await prisma.departmentMaterialPermission.findMany({
      where: { department: preset.sourceDepartment },
      select: {
        materialType: true,
        canView: true,
        canDownload: true,
        canDownloadSource: true,
        canShare: true,
      },
    })
    if (sourceRows.length === 0) continue

    await prisma.materialPermissionPackItem.createMany({
      data: sourceRows.map((row) => ({
        packId: pack.id,
        materialType: row.materialType,
        canView: row.canView,
        canDownload: row.canDownload,
        canDownloadSource: row.canDownloadSource,
        canShare: row.canShare,
        canEditAssets: false,
        canAccessPrivate: false,
      })),
    })
  }
}

const PACK_ITEM_SELECT = {
  materialType: true,
  canView: true,
  canDownload: true,
  canDownloadSource: true,
  canShare: true,
  canEditAssets: true,
  canAccessPrivate: true,
} as const

export async function loadUserInheritPack(userId: string): Promise<PermissionPackMap | null> {
  try {
    const assignments = await prisma.userPermissionInherit.findMany({
      where: { userId },
      select: {
        pack: {
          select: {
            items: { select: PACK_ITEM_SELECT },
          },
        },
      },
    })
    if (assignments.length === 0) return null
    return unionPermissionPacks(...assignments.map((row) => packItemsToMap(row.pack.items)))
  } catch (error) {
    if (isMissingInheritTable(error)) return null
    throw error
  }
}

/**
 * 任务-详情单图编辑授权线：用户的花名册路径权限组（部门组+个人组并集）
 * 对「任务-详情」勾选了编辑图片即获得。与上传者/管理员/托管部门的既有
 * 授权线叠加，任何一边允许即可编辑。
 */
export async function canUserEditTaskDetailAssets(userId: string): Promise<boolean> {
  if (!userId) return false
  try {
    const { resolveRosterPermissionPack } = await import('./department-permission')
    const pack = await resolveRosterPermissionPack(userId)
    return pack?.['任务-详情']?.canEditAssets === true
  } catch (error) {
    console.error('[user-permission-inherit] 读取任务-详情编辑权限失败:', error)
    return false
  }
}

/**
 * 私密任务-详情查看/下载：只认权限组勾选，不给上传者/管理员额外豁免。
 */
export async function canUserAccessPrivateTaskDetail(userId: string): Promise<boolean> {
  if (!userId) return false
  try {
    const { resolveRosterPermissionPack } = await import('./department-permission')
    const pack = await resolveRosterPermissionPack(userId)
    return pack?.['任务-详情']?.canAccessPrivate === true
  } catch (error) {
    console.error('[user-permission-inherit] 读取任务-详情私密权限失败:', error)
    return false
  }
}

/**
 * 视频提前访问豁免：用户加入的任意权限组开启了该组级能力即获得。
 * 部门进组是素材可见范围的底子，不参与此判定；豁免按"人进组是加餐"的口径只认个人挂载。
 */
export async function resolveUserVideoEarlyAccess(userId: string): Promise<boolean> {
  if (!userId) return false
  try {
    const assignment = await prisma.userPermissionInherit.findFirst({
      where: { userId, pack: { videoEarlyAccess: true } },
      select: { id: true },
    })
    return Boolean(assignment)
  } catch (error) {
    if (isMissingInheritTable(error)) return false
    throw error
  }
}

export async function savePermissionPackItems(
  slug: string,
  permissions: Array<MaterialPermissionFlags & { materialType: string }>,
) {
  const pack = await prisma.materialPermissionPack.findUnique({
    where: { slug },
    select: { id: true },
  })
  if (!pack) throw new Error('没有这套继承权限')

  await prisma.$transaction([
    prisma.materialPermissionPackItem.deleteMany({ where: { packId: pack.id } }),
    prisma.materialPermissionPackItem.createMany({
      data: permissions
        .filter((item) => item.materialType)
        .map((item) => {
          const taskDetailOnlyFlags = normalizeTaskDetailOnlyFlags(item.materialType, item)
          return {
            packId: pack.id,
            materialType: item.materialType,
            canView: item.canView,
            canDownload: item.canDownload,
            canDownloadSource: item.canDownloadSource,
            canShare: item.canShare,
            canEditAssets: taskDetailOnlyFlags.canEditAssets,
            canAccessPrivate: taskDetailOnlyFlags.canAccessPrivate,
          }
        }),
    }),
  ])
}