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

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

  async findById(id: string) {
    return this.prisma.user.findUnique({
      where: { id },
      include: { 
        pets: {
          include: {
            medicalConditions: true,
            reminders: {
              include: {
                completions: true
              }
            },
            healthLogs: true,
          }
        }, 
        orders: {
          orderBy: { createdAt: 'desc' },
          include: {
            orderItems: {
              include: { product: true }
            }
          }
        },
        addresses: true,
        walletTransactions: {
          orderBy: { createdAt: 'desc' },
          take: 50
        }
      }
    });
  }

  async update(id: string, data: any) {
    return this.prisma.user.update({
      where: { id },
      data,
      include: {
        pets: true,
        orders: {
          include: {
            orderItems: {
              include: { product: true }
            }
          }
        },
        addresses: true,
        walletTransactions: true
      }
    });
  }

  async addAddress(userId: string, data: any) {
    if (data.isDefault) {
      await this.prisma.userAddress.updateMany({
        where: { userId },
        data: { isDefault: false },
      });
    }
    return this.prisma.userAddress.create({
      data: {
        title: data.title,
        receptorName: data.receptorName,
        phone: data.phone,
        province: data.province,
        city: data.city,
        detail: data.detail,
        zipCode: data.zipCode,
        isDefault: data.isDefault || false,
        userId: userId,
      },
    });
  }

  async updateAddress(userId: string, addressId: string, data: any) {
    if (data.isDefault) {
      await this.prisma.userAddress.updateMany({
        where: { userId, NOT: { id: addressId } },
        data: { isDefault: false },
      });
    }
    return this.prisma.userAddress.update({
      where: { id: addressId, userId },
      data: {
        title: data.title,
        receptorName: data.receptorName,
        phone: data.phone,
        province: data.province,
        city: data.city,
        detail: data.detail,
        zipCode: data.zipCode,
        isDefault: data.isDefault || false,
      },
    });
  }

  async deleteAddress(userId: string, addressId: string) {
    return this.prisma.userAddress.delete({
      where: { id: addressId, userId },
    });
  }

  async setDefaultAddress(userId: string, addressId: string) {
    await this.prisma.userAddress.updateMany({
      where: { userId },
      data: { isDefault: false },
    });
    return this.prisma.userAddress.update({
      where: { id: addressId, userId },
      data: { isDefault: true },
    });
  }

  async topUpWallet(userId: string, amount: number) {
    if (amount <= 0) {
      throw new Error('مبلغ شارژ باید بزرگتر از صفر باشد');
    }

    const [transaction] = await this.prisma.$transaction([
      this.prisma.walletTransaction.create({
        data: {
          userId,
          amount,
          type: 'deposit',
          status: 'completed',
          description: 'شارژ کیف پول',
        },
      }),
      this.prisma.user.update({
        where: { id: userId },
        data: { walletBalance: { increment: amount } },
      }),
    ]);

    return transaction;
  }

  async findByPhone(phoneNumber: string) {
    return this.prisma.user.findUnique({
      where: { mobile: phoneNumber },
    });
  }
}