import { Injectable } from '@nestjs/common';
import { JwtService } from '@nestjs/jwt';
import { PrismaService } from '../prisma/prisma.service';

@Injectable()
export class AuthService {
  constructor(
    private prisma: PrismaService,
    private jwtService: JwtService,
  ) {}

  async createAnonymousUser(name?: string) {
    const user = await this.prisma.user.create({
      data: { name: name || 'Гость' },
    });

    const token = this.jwtService.sign({ sub: user.id, type: 'anonymous' });
    return { user, token };
  }

  async register(email: string, password: string, name: string) {
    const user = await this.prisma.user.create({
      data: {
        email,
        name,
      },
    });

    const token = this.jwtService.sign({ sub: user.id, type: 'registered' });
    return { user, token };
  }

  async login(email: string, password: string) {
    const user = await this.prisma.user.findUnique({
      where: { email },
    });

    if (!user) {
      throw new Error('User not found');
    }

    const token = this.jwtService.sign({ sub: user.id, type: 'registered' });
    return { user, token };
  }

  async validateUser(userId: string) {
    return this.prisma.user.findUnique({ where: { id: userId } });
  }

  async updateUserName(userId: string, name: string) {
    const user = await this.prisma.user.findUnique({
      where: { id: userId },
    });

    if (!user) {
      throw new Error('User not found');
    }

    return this.prisma.user.update({
      where: { id: userId },
      data: { name },
      select: {
        id: true,
        email: true,
        name: true,
        role: true,
        telegramId: true,
        createdAt: true,
        gamesPlayed: true,
        gamesWon: true,
        totalPoints: true,
      },
    });
  }
}