58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
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import db from '../config/database';
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import { AuditService } from './AuditService';
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import { AIService } from './AIService';
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/**
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* [BIZ_FIN_16] 租户级税务优惠政策自动发现
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* 负责扫描全球各地区的最新税务优惠（如 IOSS 减免、特定类目退税等），并自动提醒租户
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*/
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export class TaxIncentivesService {
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/**
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* 自动发现税务优惠
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*/
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static async discoverIncentives(tenantId: string, countryCode: string, traceId: string): Promise<void> {
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// 1. 获取该地区的最新税务政策 (模拟调用 AI 服务分析全球税法库)
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const policies = await AIService.searchTaxPolicies(countryCode);
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for (const policy of policies) {
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// 检查是否已记录
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const existing = await db('cf_tax_incentives')
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.where({ tenant_id: tenantId, country_code: countryCode, policy_name: policy.name })
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.first();
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if (!existing) {
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await db.transaction(async (trx) => {
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const [id] = await trx('cf_tax_incentives').insert({
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tenant_id: tenantId,
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country_code: countryCode,
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policy_name: policy.name,
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description: policy.description,
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estimated_savings: policy.estimatedSavings,
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status: 'DISCOVERED'
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});
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// 审计记录
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await AuditService.log({
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tenant_id: tenantId,
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action: 'TAX_INCENTIVE_DISCOVERED',
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target_type: 'TAX_INCENTIVE',
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target_id: id.toString(),
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trace_id: traceId,
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new_data: JSON.stringify({ policyName: policy.name, estimatedSavings: policy.estimatedSavings }),
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metadata: JSON.stringify({ countryCode })
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});
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});
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}
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}
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}
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/**
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* 获取租户所有已发现的优惠
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*/
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static async getIncentives(tenantId: string) {
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return await db('cf_tax_incentives')
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.where({ tenant_id: tenantId })
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.orderBy('estimated_savings', 'desc');
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}
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}
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