# All files / modules/onboarding onboarding.service.ts

96.96% Statements 64/66
77.27% Branches 17/22
100% Functions 8/8
96.87% Lines 62/64

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     import { Injectable, Logger, BadRequestException } from '@nestjs/common';
    import { InjectRepository } from '@nestjs/typeorm';
    import { Repository } from 'typeorm';
    import { Tenant } from '../tenants/entities/tenant.entity';
    import { User } from '../auth/entities/user.entity';
    import { Token } from '../auth/entities/token.entity';
    import { Subscription } from '../billing/entities/subscription.entity';
    import { EmailService } from '../email/services/email.service';
    import { AuditService, CreateAuditLogParams } from '../audit/services/audit.service';
    import { AuditAction } from '../audit/entities/audit-log.entity';
    import {
      OnboardingStatusDto,
      CompanyDataDto,
      TeamDataDto,
      PlanDataDto,
      CompleteOnboardingResponseDto,
    } from './dto';

    @Injectable()
    export class OnboardingService {
      private readonly logger = new Logger(OnboardingService.name);

      constructor(
        @InjectRepository(Tenant)
        private readonly tenantRepository: Repository<Tenant>,
        @InjectRepository(User)
        private readonly userRepository: Repository<User>,
        @InjectRepository(Token)
        private readonly tokenRepository: Repository<Token>,
        @InjectRepository(Subscription)
        private readonly subscriptionRepository: Repository<Subscription>,
        private readonly emailService: EmailService,
        private readonly auditService: AuditService,
      ) {}

      /**
       * Get the current onboarding status for a tenant
       */
      async getStatus(tenantId: string): Promise<OnboardingStatusDto> {
        const tenant = await this.tenantRepository.findOne({
          where: { id: tenantId },
        });

        if (!tenant) {
          throw new BadRequestException('Tenant not found');
        }

        // Get team data
        const teamData = await this.getTeamData(tenantId);

        // Get plan data
        const planData = await this.getPlanData(tenantId);

        // Get company data
        const companyData = this.getCompanyData(tenant);

        // Calculate current step
        const step = this.calculateStep(companyData, teamData, planData, tenant);

        // Check if completed
        const completed = tenant.status === 'active';

        return {
          step,
          completed,
          data: {
            company: companyData,
            team: teamData,
            plan: planData,
          },
        };
      }

      /**
       * Complete the onboarding process
       */
      async completeOnboarding(
        tenantId: string,
        userId: string,
      ): Promise<CompleteOnboardingResponseDto> {
        const tenant = await this.tenantRepository.findOne({
          where: { id: tenantId },
        });

        if (!tenant) {
          throw new BadRequestException('Tenant not found');
        }

        // Verify tenant is in pending/trial state
        if (tenant.status === 'active') {
          return {
            success: true,
            redirectUrl: '/dashboard',
          };
        }

        Iif (tenant.status !== 'trial' && tenant.status !== 'suspended' && tenant.status !== 'canceled') {
          throw new BadRequestException('Tenant is not in a valid state for onboarding completion');
        }

        // Get the user for sending welcome email
        const user = await this.userRepository.findOne({
          where: { id: userId, tenant_id: tenantId },
        });

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

        // Store old values for audit
        const oldStatus = tenant.status;

        // Update tenant status to active
        tenant.status = 'active';
        await this.tenantRepository.save(tenant);

        // Log to audit
        await this.auditService.createAuditLog({
          tenant_id: tenantId,
          user_id: userId,
          action: AuditAction.UPDATE,
          entity_type: 'tenant',
          entity_id: tenantId,
          old_values: { status: oldStatus },
          new_values: { status: 'active' },
          description: 'Onboarding completed',
        });

        // Send welcome email
        await this.sendWelcomeEmail(user, tenant);

        this.logger.log(`Onboarding completed for tenant ${tenantId}`);

        return {
          success: true,
          redirectUrl: '/dashboard',
        };
      }

      /**
       * Get company data from tenant
       */
      private getCompanyData(tenant: Tenant): CompanyDataDto | null {
        if (!tenant.name || !tenant.slug) {
          return null;
        }

        return {
          name: tenant.name,
          slug: tenant.slug,
          logo_url: tenant.logo_url,
          settings: tenant.settings,
        };
      }

      /**
       * Get team data (invitations sent and members joined)
       */
      private async getTeamData(tenantId: string): Promise<TeamDataDto> {
        // Count invitations sent (tokens with type 'invitation')
        const invitesSent = await this.tokenRepository.count({
          where: {
            tenant_id: tenantId,
            token_type: 'invitation',
          },
        });

        // Count members joined (users in the tenant excluding the owner)
        const membersJoined = await this.userRepository.count({
          where: {
            tenant_id: tenantId,
            status: 'active',
          },
        });

        // Subtract 1 for the owner if there's at least one member
        const actualMembersJoined = membersJoined > 1 ? membersJoined - 1 : 0;

        return {
          invitesSent,
          membersJoined: actualMembersJoined,
        };
      }

      /**
       * Get plan data (subscription status)
       */
      private async getPlanData(tenantId: string): Promise<PlanDataDto> {
        const subscription = await this.subscriptionRepository.findOne({
          where: { tenant_id: tenantId },
          order: { created_at: 'DESC' },
        });

        return {
          selected: !!subscription,
          planId: subscription?.plan_id || null,
        };
      }

      /**
       * Calculate the current onboarding step
       * Step 1: Company info
       * Step 2: Team invitations
       * Step 3: Plan selection
       * Step 4: Complete
       */
      private calculateStep(
        companyData: CompanyDataDto | null,
        teamData: TeamDataDto,
        planData: PlanDataDto,
        tenant: Tenant,
      ): number {
        // If onboarding is already complete, return step 4
        if (tenant.status === 'active') {
          return 4;
        }

        // Step 1: Company info
        if (!companyData) {
          return 1;
        }

        // Step 2: Team invitations (optional, but track if done)
        // For step calculation, if company is done, move to step 2
        // The user can skip this step

        // Step 3: Plan selection
        if (!planData.selected) {
          // If company info is filled, we're at step 2 or 3
          // Check if we should be at step 2 (invite) or step 3 (plan)
          // For simplicity, if company is done but no plan, return step 3
          return 3;
        }

        // All prerequisites done, ready for completion
        return 4;
      }

      /**
       * Send welcome email to user
       */
      private async sendWelcomeEmail(user: User, tenant: Tenant): Promise<void> {
        try {
          await this.emailService.sendTemplateEmail({
            to: {
              email: user.email,
              name: user.first_name || undefined,
            },
            templateKey: 'welcome',
            variables: {
              userName: user.first_name || user.email,
              appName: 'Template SaaS',
              tenantName: tenant.name,
            },
          });

          this.logger.log(`Welcome email sent to ${user.email}`);
        } catch (error) {
          // Log error but don't fail the onboarding completion
          this.logger.error(`Failed to send welcome email to ${user.email}`, error.stack);
        }
      }
    }