All files / src/platform/payments payment-routing.service.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
import { Injectable, Logger, BadRequestException } from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { Model } from 'mongoose';
import {
  PaymentProviderRegion,
  PaymentRoutingRule,
  PaymentRoutingDecision,
} from './schemas/payment-routing.schema';
import { BillingService } from '../billing/billing.service';
 
@Injectable()
export class PaymentRoutingService {
  private readonly logger = new Logger(PaymentRoutingService.name);
 
  constructor(
    @InjectModel(PaymentProviderRegion.name)
    private readonly regionModel: Model<PaymentProviderRegion>,
    @InjectModel(PaymentRoutingRule.name)
    private readonly ruleModel: Model<PaymentRoutingRule>,
    @InjectModel(PaymentRoutingDecision.name)
    private readonly decisionModel: Model<PaymentRoutingDecision>,
    private readonly billingService: BillingService,
  ) {}
 
  async getRouteProvider(
    tenantId: string,
    billingCountry: string,
    amount: number,
    currency: string,
  ): Promise<string> {
    const cleanCountry = billingCountry.trim().toUpperCase();
 
    // 1. Check custom tenant rules
    const customRule = await this.ruleModel
      .findOne({
        tenantId,
        countryCode: { $in: [cleanCountry, '*'] },
        isActive: true,
      })
      .sort({ priority: -1 })
      .exec();
 
    if (customRule) {
      await this.decisionModel.create({
        tenantId,
        billingCountry: cleanCountry,
        amount,
        currency,
        routedProvider: customRule.providerName,
        routingRuleId: (customRule as any)._id.toString(),
        reason: 'Custom tenant routing rule matches country',
      });
      return customRule.providerName;
    }
 
    // 2. Check system region settings
    const systemRegion = await this.regionModel
      .findOne({ countryCode: cleanCountry, isActive: true })
      .exec();
    if (systemRegion) {
      await this.decisionModel.create({
        tenantId,
        billingCountry: cleanCountry,
        amount,
        currency,
        routedProvider: systemRegion.primaryProvider,
        reason: 'System regional defaults matches country',
      });
      return systemRegion.primaryProvider;
    }
 
    // 3. System hardcoded default fallback:
    // If country is India (IN), use Easebuzz; otherwise use Stripe.
    const routedProvider = cleanCountry === 'IN' ? 'Easebuzz' : 'Stripe';
    await this.decisionModel.create({
      tenantId,
      billingCountry: cleanCountry,
      amount,
      currency,
      routedProvider,
      reason: 'Hardcoded country rules default routing fallback',
    });
 
    return routedProvider;
  }
 
  async configureCustomRule(
    tenantId: string,
    name: string,
    countryCode: string,
    providerName: string,
    priority = 0,
  ): Promise<PaymentRoutingRule> {
    if (!['Stripe', 'Easebuzz'].includes(providerName)) {
      throw new BadRequestException(`Unsupported gateway: ${providerName}`);
    }
 
    return this.ruleModel.create({
      tenantId,
      name,
      countryCode: countryCode.toUpperCase(),
      providerName,
      priority,
      isActive: true,
    });
  }
 
  async configureSystemRegion(
    countryCode: string,
    primaryProvider: string,
    fallbackProvider?: string,
  ): Promise<PaymentProviderRegion> {
    const cleanCountry = countryCode.toUpperCase();
    const existing = await this.regionModel
      .findOne({ countryCode: cleanCountry })
      .exec();
    const doc = existing ?? new this.regionModel({ countryCode: cleanCountry });
 
    doc.primaryProvider = primaryProvider;
    if (fallbackProvider) doc.fallbackProvider = fallbackProvider;
    doc.isActive = true;
 
    await doc.save();
    return doc;
  }
}