import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import test from 'node:test';
import {
  buildGmailQuery,
  decodeBase64Url,
  downloadGmailApiAccount,
  listGmailMessageRefs,
} from '../src/gmailApi.js';

const sample = await fs.readFile('test/fixtures/sample-bank-email.eml');

test('builds gmail after query from ISO date', () => {
  assert.equal(buildGmailQuery({ since: '2025-01-01' }), 'after:2025/01/01');
});

test('decodes gmail base64url raw message', () => {
  const encoded = sample.toString('base64').replaceAll('+', '-').replaceAll('/', '_').replaceAll('=', '');
  assert.equal(decodeBase64Url(encoded).toString(), sample.toString());
});

test('lists gmail message refs across pages', async () => {
  const calls = [];
  const gmail = {
    users: {
      messages: {
        async list(params) {
          calls.push(params);
          if (!params.pageToken) {
            return { data: { messages: [{ id: 'a' }], nextPageToken: 'next' } };
          }
          return { data: { messages: [{ id: 'b' }] } };
        },
      },
    },
  };

  const refs = await listGmailMessageRefs({ gmail, q: 'after:2025/01/01', limit: 2 });
  assert.deepEqual(refs.map((ref) => ref.id), ['a', 'b']);
  assert.equal(calls[1].pageToken, 'next');
});

test('downloads gmail raw messages into archive', async () => {
  const tmp = await fs.mkdtemp(path.join(os.tmpdir(), 'kua-gmail-api-'));
  const encoded = sample.toString('base64').replaceAll('+', '-').replaceAll('/', '_').replaceAll('=', '');
  const gmail = {
    users: {
      messages: {
        async list() {
          return { data: { messages: [{ id: 'gmail-message-1', threadId: 'thread-1' }] } };
        },
        async get(params) {
          assert.equal(params.format, 'raw');
          return {
            data: {
              id: params.id,
              threadId: 'thread-1',
              historyId: 'history-1',
              internalDate: '1764547200000',
              labelIds: ['INBOX'],
              raw: encoded,
            },
          };
        },
      },
    },
  };

  const result = await downloadGmailApiAccount({
    account: { id: 'vjoati-gmail', email: 'vjoati@gmail.com' },
    gmail,
    archiveRoot: tmp,
    since: '2025-01-01',
    limit: 1,
  });

  assert.equal(result.imported, 1);
  assert.equal(result.records[0].gmail.id, 'gmail-message-1');
  assert.equal(result.records[0].attachments.length, 1);
});