import {
  BadRequestException,
  Injectable,
  NotFoundException,
} from '@nestjs/common';
import { Prisma } from '@prisma/client';
import { PrismaService } from '../../prisma/prisma.service';
import { TahesabConnectionsService } from './connections.service';
import { normalizeMandehResponse } from './tahesab-methods';

@Injectable()
export class TahesabBalanceService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly connections: TahesabConnectionsService,
  ) {}

  async getAssets(
    organizationId: string,
    personId: string,
    connectionId?: string,
  ) {
    const person = await this.prisma.person.findFirst({
      where: { id: personId, organizationId },
    });
    if (!person) throw new NotFoundException('شخص یافت نشد.');

    const resolvedId = await this.connections.resolveConnectionId(
      organizationId,
      connectionId,
    );

    const link = await this.prisma.personAccountingLink.findFirst({
      where: { personId, connectionId: resolvedId },
      include: {
        connection: {
          select: { id: true, label: true, dbName: true, isDefault: true },
        },
        balanceCache: true,
      },
    });
    if (!link) {
      throw new BadRequestException(
        'این شخص به اتصال ته‌حساب لینک نشده است. ابتدا تطبیق یا ثبت در ته‌حساب را انجام دهید.',
      );
    }

    const { api } = await this.connections.getApi(organizationId, resolvedId);
    const raw = await api.getMandeHesabByCode(link.moshtariCode);
    const normalized = normalizeMandehResponse(raw);

    const cache = await this.prisma.accountingBalanceCache.upsert({
      where: { linkId: link.id },
      create: {
        linkId: link.id,
        connectionId: resolvedId,
        goldBalance: normalized.goldBalance,
        rialBalance: normalized.rialBalance,
        currencyBalance: normalized.currencyBalance,
        totalGoldEquiv: normalized.totalGoldEquiv,
        mandehDetail: normalized.mandehDetail as unknown as Prisma.InputJsonValue,
        rawResponse: normalized.raw as Prisma.InputJsonValue,
        fetchedAt: new Date(),
      },
      update: {
        goldBalance: normalized.goldBalance,
        rialBalance: normalized.rialBalance,
        currencyBalance: normalized.currencyBalance,
        totalGoldEquiv: normalized.totalGoldEquiv,
        mandehDetail: normalized.mandehDetail as unknown as Prisma.InputJsonValue,
        rawResponse: normalized.raw as Prisma.InputJsonValue,
        fetchedAt: new Date(),
      },
    });

    await this.prisma.personAccountingLink.update({
      where: { id: link.id },
      data: { lastBalanceSyncedAt: cache.fetchedAt },
    });

    return {
      connectionId: resolvedId,
      connectionLabel: link.connection.label,
      dbName: link.connection.dbName,
      moshtariCode: link.moshtariCode,
      goldBalance: normalized.goldBalance,
      rialBalance: normalized.rialBalance,
      currencyBalance: normalized.currencyBalance,
      totalGoldEquiv: normalized.totalGoldEquiv,
      mandehDetail: normalized.mandehDetail,
      fetchedAt: cache.fetchedAt.toISOString(),
    };
  }

  async getCachedOrFetch(
    organizationId: string,
    personId: string,
    connectionId?: string,
    refresh = true,
  ) {
    if (refresh) {
      return this.getAssets(organizationId, personId, connectionId);
    }
    const resolvedId = await this.connections.resolveConnectionId(
      organizationId,
      connectionId,
    );
    const link = await this.prisma.personAccountingLink.findFirst({
      where: { personId, connectionId: resolvedId },
      include: {
        connection: { select: { label: true, dbName: true } },
        balanceCache: true,
      },
    });
    if (!link?.balanceCache) {
      return this.getAssets(organizationId, personId, connectionId);
    }
    const c = link.balanceCache;
    return {
      connectionId: resolvedId,
      connectionLabel: link.connection.label,
      dbName: link.connection.dbName,
      moshtariCode: link.moshtariCode,
      goldBalance: c.goldBalance,
      rialBalance: c.rialBalance,
      currencyBalance: c.currencyBalance,
      totalGoldEquiv: c.totalGoldEquiv,
      mandehDetail: c.mandehDetail,
      fetchedAt: c.fetchedAt.toISOString(),
    };
  }
}