import { describe, it, expect } from 'vitest';
import type { NostrEvent } from '@nostrify/nostrify';
import { zapTargetKey, zapReceiptSats } from './useZapTotals';

/** Minimal event factory — only the fields these helpers read. */
function ev(partial: Partial<NostrEvent> & Pick<NostrEvent, 'kind' | 'pubkey' | 'id'>): NostrEvent {
  return {
    content: '',
    created_at: 0,
    sig: '',
    tags: [],
    ...partial,
  } as NostrEvent;
}

describe('zapTargetKey', () => {
  it('uses the event id for regular (non-addressable) events', () => {
    const e = ev({ kind: 1, pubkey: 'aa', id: 'abc123' });
    expect(zapTargetKey(e)).toBe('abc123');
  });

  it('uses the addressable coordinate for kind 30000-39999', () => {
    const e = ev({
      kind: 30818,
      pubkey: 'deadbeef',
      id: 'ignored',
      tags: [['d', 'tilcayo']],
    });
    expect(zapTargetKey(e)).toBe('30818:deadbeef:tilcayo');
  });

  it('handles an addressable event with a missing d tag', () => {
    const e = ev({ kind: 30818, pubkey: 'deadbeef', id: 'ignored' });
    expect(zapTargetKey(e)).toBe('30818:deadbeef:');
  });
});

describe('zapReceiptSats', () => {
  it('reads the amount tag (millisats -> sats)', () => {
    const receipt = ev({
      kind: 9735,
      pubkey: 'lnurl-server',
      id: 'r1',
      tags: [['amount', '21000']],
    });
    expect(zapReceiptSats(receipt)).toBe(21);
  });

  it('falls back to the bolt11 invoice amount', () => {
    const receipt = ev({
      kind: 9735,
      pubkey: 'lnurl-server',
      id: 'r2',
      tags: [['bolt11', 'lnbc210n1pvjluezpp5abcdef']],
    });
    expect(zapReceiptSats(receipt)).toBe(21);
  });

  it('falls back to the zap request in the description tag', () => {
    const receipt = ev({
      kind: 9735,
      pubkey: 'lnurl-server',
      id: 'r3',
      tags: [
        ['description', JSON.stringify({ tags: [['amount', '1000000']] })],
      ],
    });
    expect(zapReceiptSats(receipt)).toBe(1000);
  });

  it('returns 0 when no amount can be determined', () => {
    const receipt = ev({ kind: 9735, pubkey: 'lnurl-server', id: 'r4' });
    expect(zapReceiptSats(receipt)).toBe(0);
  });

  it('returns 0 for a malformed description instead of throwing', () => {
    const receipt = ev({
      kind: 9735,
      pubkey: 'lnurl-server',
      id: 'r5',
      tags: [['description', '{not json']],
    });
    expect(zapReceiptSats(receipt)).toBe(0);
  });
});