const {
  TRAVEL_RECONCILIATION_MATCH_STATUSES,
  TRAVEL_RECONCILIATION_RESOLUTION_STATUSES,
  buildReconciliationItemsSnapshot,
} = require('../../../src/services/travelReconciliation');

function buildOrder(overrides = {}) {
  return {
    id: 'order-1',
    external_order_no: 'EXT-001',
    linked_reimbursement_id: null,
    travel_request_id: 'travel-1',
    amount: '100.00',
    currency: 'CNY',
    status: 'paid',
    travel_request: {
      id: 'travel-1',
      request_no: 'CL-20260311-0001',
    },
    ...overrides,
  };
}

function buildTransaction(overrides = {}) {
  return {
    id: 'txn-1',
    external_txn_id: 'TXN-001',
    travel_request_id: 'travel-1',
    travel_order_id: 'order-1',
    amount: '100.00',
    currency: 'CNY',
    txn_type: 'charge',
    status: 'settled',
    travel_request: {
      id: 'travel-1',
      request_no: 'CL-20260311-0001',
    },
    travel_order: {
      id: 'order-1',
      external_order_no: 'EXT-001',
      linked_reimbursement_id: null,
      status: 'paid',
    },
    ...overrides,
  };
}

function buildInvoice(overrides = {}) {
  return {
    id: 'inv-1',
    travel_order_id: 'order-1',
    total_amount: '100.00',
    ...overrides,
  };
}

describe('travelReconciliation service', () => {
  it('auto-confirms exact matched order items', () => {
    const now = new Date('2026-03-11T00:00:00.000Z');
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [buildTransaction()],
      invoices: [buildInvoice()],
      actorId: 'actor-1',
      now,
    });

    expect(snapshot.summary).toEqual(
      expect.objectContaining({
        totalOrders: 1,
        totalTransactions: 1,
        matchedItems: 1,
        pendingItems: 0,
        anomalyItems: 0,
        totalOrderAmount: '100.00',
        totalSettledAmount: '100.00',
        totalReversedAmount: '0.00',
        matchRate: '100.00',
      }),
    );

    expect(snapshot.items[0]).toEqual(
      expect.objectContaining({
        match_status: TRAVEL_RECONCILIATION_MATCH_STATUSES.matched,
        resolution_status: TRAVEL_RECONCILIATION_RESOLUTION_STATUSES.confirmed,
        confirmed_by: 'actor-1',
        confirmed_at: now,
        snapshot_json: expect.objectContaining({
          boundInvoiceCount: 1,
          boundInvoiceAmount: '100.00',
          matchedTransactionIds: ['txn-1'],
        }),
      }),
    );
  });

  it('marks amount mismatch when settled charge amount differs', () => {
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [buildTransaction({ amount: '88.00' })],
      invoices: [],
      actorId: 'actor-1',
      now: new Date('2026-03-11T00:00:00.000Z'),
    });

    expect(snapshot.items[0]).toEqual(
      expect.objectContaining({
        match_status: TRAVEL_RECONCILIATION_MATCH_STATUSES.amountMismatch,
        resolution_status: TRAVEL_RECONCILIATION_RESOLUTION_STATUSES.pending,
        anomaly_code: TRAVEL_RECONCILIATION_MATCH_STATUSES.amountMismatch,
        transaction_amount: '88.00',
      }),
    );
  });

  it('marks currency mismatch when settled charge currency differs', () => {
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [buildTransaction({ currency: 'USD' })],
      invoices: [],
      actorId: 'actor-1',
      now: new Date('2026-03-11T00:00:00.000Z'),
    });

    expect(snapshot.items[0].match_status).toBe(TRAVEL_RECONCILIATION_MATCH_STATUSES.currencyMismatch);
    expect(snapshot.items[0].resolution_status).toBe(TRAVEL_RECONCILIATION_RESOLUTION_STATUSES.pending);
  });

  it('marks missing transaction when no settled charge exists', () => {
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [],
      invoices: [],
      actorId: 'actor-1',
      now: new Date('2026-03-11T00:00:00.000Z'),
    });

    expect(snapshot.items[0].match_status).toBe(TRAVEL_RECONCILIATION_MATCH_STATUSES.missingTransaction);
  });

  it('marks duplicate charge when multiple settled charges exist', () => {
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [
        buildTransaction({ id: 'txn-1', external_txn_id: 'TXN-001' }),
        buildTransaction({ id: 'txn-2', external_txn_id: 'TXN-002' }),
      ],
      invoices: [],
      actorId: 'actor-1',
      now: new Date('2026-03-11T00:00:00.000Z'),
    });

    expect(snapshot.items[0]).toEqual(
      expect.objectContaining({
        match_status: TRAVEL_RECONCILIATION_MATCH_STATUSES.duplicateCharge,
        resolution_status: TRAVEL_RECONCILIATION_RESOLUTION_STATUSES.pending,
      }),
    );
  });

  it('marks reversed after payment when refund or reversal appears', () => {
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [buildTransaction({ txn_type: 'refund', status: 'settled' })],
      invoices: [],
      actorId: 'actor-1',
      now: new Date('2026-03-11T00:00:00.000Z'),
    });

    expect(snapshot.items[0].match_status).toBe(TRAVEL_RECONCILIATION_MATCH_STATUSES.reversedAfterPayment);
  });

  it('creates orphan transaction items for unlinked settled or reversed transactions', () => {
    const snapshot = buildReconciliationItemsSnapshot({
      orders: [buildOrder()],
      transactions: [
        buildTransaction(),
        buildTransaction({
          id: 'txn-orphan',
          external_txn_id: 'TXN-ORPHAN',
          travel_order_id: null,
          txn_type: 'charge',
          status: 'settled',
          travel_order: null,
        }),
      ],
      invoices: [],
      actorId: 'actor-1',
      now: new Date('2026-03-11T00:00:00.000Z'),
    });

    const orphan = snapshot.items.find((item) => item.card_transaction_id === 'txn-orphan');
    expect(orphan).toEqual(
      expect.objectContaining({
        item_kind: 'orphan_transaction',
        match_status: TRAVEL_RECONCILIATION_MATCH_STATUSES.orphanTransaction,
        resolution_status: TRAVEL_RECONCILIATION_RESOLUTION_STATUSES.pending,
      }),
    );
    expect(snapshot.summary).toEqual(
      expect.objectContaining({
        totalOrders: 1,
        totalTransactions: 2,
        matchedItems: 1,
        pendingItems: 1,
        anomalyItems: 1,
        matchRate: '50.00',
      }),
    );
  });
});