import { describe, expect, it } from 'vitest';

import { Prisma } from '@lisglosips/database';
import type { ParsedCdrStreamEvent } from '@lisglosips/redis';

import { calculateCycleCharge } from './billing.js';
import { CdrRatingService, type CdrRatingStore, type CdrRatingTransaction, type CreateRatedInput } from './rating.js';

class MemoryStore implements CdrRatingStore, CdrRatingTransaction {
  rawByEventId = new Map<string, { id: string; eventId: string; ratingStatus: 'UNRATED' | 'RATED' | 'SKIPPED' | 'FAILED' }>();
  ratedByRawId = new Map<string, { id: string; rawCdrId: string; customerFee: Prisma.Decimal }>();
  vendorGateway = { id: 'vgw_1', vendorId: 'ven_1', billingCycleSec: 6, cycleRate: new Prisma.Decimal('0.012000') };
  customer = { id: 'cus_1', balance: new Prisma.Decimal('10.000000') };

  async transaction<T>(operation: (tx: CdrRatingTransaction) => Promise<T>): Promise<T> {
    return operation(this);
  }

  async findRawByEventId(eventId: string) {
    return this.rawByEventId.get(eventId) ?? null;
  }

  async createRaw(event: ParsedCdrStreamEvent, rawCdrId: string) {
    const raw = { id: rawCdrId, eventId: event.event_id, ratingStatus: 'UNRATED' as const };
    this.rawByEventId.set(event.event_id, raw);
    return raw;
  }

  async findRatedByRawCdrId(rawCdrId: string) {
    return this.ratedByRawId.get(rawCdrId) ?? null;
  }

  async findVendorGateway() {
    return this.vendorGateway;
  }

  async lockCustomer() {
    return this.customer;
  }

  async createRated(input: CreateRatedInput) {
    const rated = { id: input.id, rawCdrId: input.rawCdrId, customerFee: input.customerFee };
    this.ratedByRawId.set(input.rawCdrId, rated);
    return rated;
  }

  async markRawStatus(rawCdrId: string, status: 'RATED' | 'SKIPPED' | 'FAILED'): Promise<void> {
    for (const [eventId, raw] of this.rawByEventId) {
      if (raw.id === rawCdrId) {
        this.rawByEventId.set(eventId, { ...raw, ratingStatus: status });
      }
    }
  }

  async updateCustomerBalance(_customerId: string, balance: Prisma.Decimal): Promise<void> {
    this.customer.balance = balance;
  }
}

function event(overrides: Partial<ParsedCdrStreamEvent> = {}): ParsedCdrStreamEvent {
  return {
    schema_version: '1',
    event_id: 'evt_1',
    idempotency_key: 'call_1:2026-06-21T00:00:30.000Z',
    call_id: 'call_1',
    node_id: 'a1',
    opensips_instance: 'opensips-a1',
    ingress_a_ip: '100.90.90.90',
    rtpengine_node: 'a1',
    customer_id: 'cus_1',
    customer_gateway_id: 'cgw_1',
    customer_gateway_policy_id: 'cgp_1',
    source_ip: '100.93.185.30',
    caller: '1001',
    callee: '13800138000',
    callee_city_code: '340100',
    callee_city_name: '合肥市',
    callee_province_name: '安徽省',
    callee_operator: 'MOBILE',
    callee_number_type: 'MOBILE',
    vendor_id: 'ven_1',
    vendor_gateway_id: 'vgw_1',
    line_group_id: 'lg_1',
    started_at: '2026-06-21T00:00:00.000Z',
    answered_at: '2026-06-21T00:00:02.000Z',
    ended_at: '2026-06-21T00:00:30.000Z',
    duration_sec: '28',
    sip_code: '200',
    hangup_reason: 'NORMAL_CLEARING',
    recording_key: '',
    config_version: '1',
    created_at: '2026-06-21T00:00:31.000Z',
    durationSeconds: 28,
    sipCode: 200,
    ...overrides
  };
}

describe('S23 CDR rating', () => {
  it('calculates Decimal cycle charges with ceiling billing seconds', () => {
    const charge = calculateCycleCharge({ durationSec: 28, billingCycleSec: 6, cycleRate: '0.012000' });

    expect(charge.cycles).toBe(5);
    expect(charge.billSec).toBe(30);
    expect(charge.amount.toFixed(6)).toBe('0.060000');
  });

  it('rates a successful CDR and deducts customer balance once without recharge ledger records', async () => {
    const store = new MemoryStore();
    const service = new CdrRatingService(store);

    const result = await service.rate(event());
    const duplicate = await service.rate(event());

    expect(result).toMatchObject({
      outcome: 'rated',
      customerFee: '0.060000',
      vendorCost: '0.060000',
      grossProfit: '0.000000',
      billSec: 30
    });
    expect(duplicate.outcome).toBe('duplicate');
    expect(store.customer.balance.toFixed(6)).toBe('9.940000');
  });

  it('skips failed or zero-duration CDRs without balance changes', async () => {
    const store = new MemoryStore();
    const service = new CdrRatingService(store);

    const result = await service.rate(event({ event_id: 'evt_failed', sip_code: '503', sipCode: 503, duration_sec: '0', durationSeconds: 0 }));

    expect(result.outcome).toBe('skipped');
    expect(result.customerFee).toBe('0.000000');
    expect(store.customer.balance.toFixed(6)).toBe('10.000000');
  });
});