// ============================================================
// Shared Owner Service fuer Contact, Company, Deal
// ============================================================

import { Injectable, NotFoundException } from '@nestjs/common';
import { CrmPrismaService } from '../prisma/crm-prisma.service';
import { AddOwnerDto } from '../common/dto/owner.dto';

@Injectable()
export class OwnersService {
  constructor(private readonly prisma: CrmPrismaService) {}

  // --------------------------------------------------------
  // Contact Owners
  // --------------------------------------------------------

  async addContactOwner(tenantId: string, contactId: string, dto: AddOwnerDto) {
    // Contact existiert + gehoert zum Tenant
    const contact = await this.prisma.contact.findFirst({
      where: { id: contactId, tenantId },
    });
    if (!contact) {
      throw new NotFoundException('Kontakt nicht gefunden');
    }

    // Upsert: Falls Owner bereits existiert, Rolle aktualisieren
    return this.prisma.contactOwner.upsert({
      where: {
        contactId_userId: { contactId, userId: dto.userId },
      },
      create: {
        tenantId,
        contactId,
        userId: dto.userId,
        role: dto.role ?? 'OWNER',
      },
      update: {
        role: dto.role ?? 'OWNER',
      },
    });
  }

  async removeContactOwner(tenantId: string, contactId: string, userId: string) {
    // Contact existiert + gehoert zum Tenant
    const contact = await this.prisma.contact.findFirst({
      where: { id: contactId, tenantId },
    });
    if (!contact) {
      throw new NotFoundException('Kontakt nicht gefunden');
    }

    // Owner suchen
    const owner = await this.prisma.contactOwner.findUnique({
      where: {
        contactId_userId: { contactId, userId },
      },
    });
    if (!owner) {
      throw new NotFoundException('Owner nicht gefunden');
    }

    return this.prisma.contactOwner.delete({
      where: { id: owner.id },
    });
  }

  // --------------------------------------------------------
  // Company Owners
  // --------------------------------------------------------

  async addCompanyOwner(tenantId: string, companyId: string, dto: AddOwnerDto) {
    const company = await this.prisma.company.findFirst({
      where: { id: companyId, tenantId },
    });
    if (!company) {
      throw new NotFoundException('Unternehmen nicht gefunden');
    }

    return this.prisma.companyOwner.upsert({
      where: {
        companyId_userId: { companyId, userId: dto.userId },
      },
      create: {
        tenantId,
        companyId,
        userId: dto.userId,
        role: dto.role ?? 'OWNER',
      },
      update: {
        role: dto.role ?? 'OWNER',
      },
    });
  }

  async removeCompanyOwner(tenantId: string, companyId: string, userId: string) {
    const company = await this.prisma.company.findFirst({
      where: { id: companyId, tenantId },
    });
    if (!company) {
      throw new NotFoundException('Unternehmen nicht gefunden');
    }

    const owner = await this.prisma.companyOwner.findUnique({
      where: {
        companyId_userId: { companyId, userId },
      },
    });
    if (!owner) {
      throw new NotFoundException('Owner nicht gefunden');
    }

    return this.prisma.companyOwner.delete({
      where: { id: owner.id },
    });
  }

  // --------------------------------------------------------
  // Deal Owners
  // --------------------------------------------------------

  async addDealOwner(tenantId: string, dealId: string, dto: AddOwnerDto) {
    const deal = await this.prisma.deal.findFirst({
      where: { id: dealId, tenantId },
    });
    if (!deal) {
      throw new NotFoundException('Vorgang nicht gefunden');
    }

    return this.prisma.dealOwner.upsert({
      where: {
        dealId_userId: { dealId, userId: dto.userId },
      },
      create: {
        tenantId,
        dealId,
        userId: dto.userId,
        role: dto.role ?? 'OWNER',
      },
      update: {
        role: dto.role ?? 'OWNER',
      },
    });
  }

  async removeDealOwner(tenantId: string, dealId: string, userId: string) {
    const deal = await this.prisma.deal.findFirst({
      where: { id: dealId, tenantId },
    });
    if (!deal) {
      throw new NotFoundException('Vorgang nicht gefunden');
    }

    const owner = await this.prisma.dealOwner.findUnique({
      where: {
        dealId_userId: { dealId, userId },
      },
    });
    if (!owner) {
      throw new NotFoundException('Owner nicht gefunden');
    }

    return this.prisma.dealOwner.delete({
      where: { id: owner.id },
    });
  }
}