import {Injectable} from "@nestjs/common";
import {PrismaService} from "@/prisma/prisma.service";
import {checkUserHasAccount, checkUserIsAdmin} from "src/utils/checkUser";


@Injectable()
export class UserService {
  constructor(private prisma: PrismaService) {}

  /**
   * Retrieves the assets of a given user, including their first name, last name, available dollars,
   * pseudo, and associated cryptocurrencies.
   *
   * @param {string} userId - The unique identifier of the user whose assets are being retrieved.
   * @return A promise that resolves to an object containing the user's assets and associated data.
   */
  async getMyAssets(userId: string) {
    await checkUserHasAccount(userId);

    return this.prisma.user.findUnique({
      where: {
        id: userId,
      },
      select: {
        firstName: true,
        lastName: true,
        dollarAvailables: true,
        pseudo: true,
        UserHasCrypto: {
          select: {
            Crypto: true,
          },
        },
      },
    });
  }

  /**
   * Retrieves the assets of users based on user ID.
   *
   * @param {string} userId - The ID of the user requesting the assets.
   * @return A promise that resolves to an array of user assets.
   */
  async getUsersAssets(userId: string) {
    await checkUserIsAdmin(userId);

    return this.prisma.user.findMany({
      select: {
        firstName: true,
        lastName: true,
        pseudo: true,
        dollarAvailables: true,
        UserHasCrypto: {
          select: {
            Crypto: true,
            amount: true,
          },
        },
      },
      take: 20,
    });
  }

  /**
   * Fetches all trades associated with a given user.
   *
   * @param {string} userId - The unique identifier of the user.
   * @return A promise that resolves to an array of trade objects.
   */
  async getMyTrades(userId: string) {
    await checkUserHasAccount(userId);
    return this.prisma.trade.findMany({
      where: {
        OR: [{id_giver: userId}, {id_receiver: userId}],
      },
      include: {
        Crypto: true,
      },
    });
  }
}