import type { RoleSummary, UserDetail, UserSummary } from '@lingxi/shared';
import type { Prisma, Role, UserStatus as PrismaUserStatus } from '@prisma/client';

/** 用户列表 / 详情需要的关联数据（部门含父级、角色） */
export type UserWithRelations = Prisma.UserGetPayload<{
  include: {
    department: { include: { parent: true } };
    roles: { include: { role: true } };
  };
}>;

export function iso(value: Date): string {
  return value.toISOString();
}

export function isoOrNull(value: Date | null): string | null {
  return value === null ? null : value.toISOString();
}

/** 手机号脱敏：138****2046；全号只在具备 user:manage 时由详情接口附带 */
export function maskPhone(phone: string): string {
  return `${phone.slice(0, 3)}****${phone.slice(7)}`;
}

export function toRoleSummary(role: Role): RoleSummary {
  return {
    id: role.id,
    code: role.code,
    name: role.name,
    isSystem: role.isSystem,
    ...(role.description.length > 0 ? { description: role.description } : {}),
  };
}

export function toApiStatus(status: PrismaUserStatus): UserSummary['status'] {
  return status === 'ACTIVE' ? 'active' : 'disabled';
}

function departmentFields(
  user: UserWithRelations,
): Pick<UserSummary, 'departmentId' | 'departmentName' | 'groupId' | 'groupName'> {
  const leaf = user.department;
  const parent = leaf.parent;
  if (leaf.parentId !== null && parent !== null) {
    return {
      departmentId: parent.id,
      departmentName: parent.name,
      groupId: leaf.id,
      groupName: leaf.name,
    };
  }
  return {
    departmentId: leaf.id,
    departmentName: leaf.name,
    groupId: null,
    groupName: null,
  };
}

export function toUserSummary(user: UserWithRelations): UserSummary {
  return {
    id: user.id,
    name: user.name,
    phoneMasked: maskPhone(user.phone),
    account: user.account,
    ...departmentFields(user),
    roles: user.roles
      .filter((item) => item.role.status === 'ACTIVE')
      .map((item) => toRoleSummary(item.role)),
    status: toApiStatus(user.status),
    lastLoginAt: isoOrNull(user.lastLoginAt),
    createdAt: iso(user.createdAt),
  };
}

/** 详情：phone 全号仅调用方具备 user:manage 时返回（契约铁律） */
export function toUserDetail(user: UserWithRelations, canSeePhone: boolean): UserDetail {
  return {
    ...toUserSummary(user),
    ...(canSeePhone ? { phone: user.phone } : {}),
    mustChangePassword: user.mustChangePassword,
    updatedAt: iso(user.updatedAt),
    lastLoginIp: user.lastLoginIp,
    disabledAt: isoOrNull(user.disabledAt),
  };
}