import { describe, expect, it } from 'vitest';
import { buildBrowserCommand, GmailClient } from '../src/gmail/client.js';

describe('GmailClient', () => {
  it('uses PowerShell to open Windows OAuth URLs without splitting query parameters', () => {
    const url =
      'https://accounts.google.com/o/oauth2/v2/auth?access_type=offline&response_type=code';

    expect(buildBrowserCommand(url, 'win32')).toEqual({
      file: 'powershell.exe',
      args: ['-NoProfile', '-Command', 'Start-Process -FilePath $args[0]', url]
    });
  });

  it('loads HTML messages from the configured Gmail label', async () => {
    const calls: string[] = [];
    const gmail = {
      users: {
        labels: {
          list: async () => ({
            data: { labels: [{ id: 'Label_1', name: 'Newsletters' }] }
          })
        },
        messages: {
          list: async (_params: unknown) => {
            calls.push('list');
            return { data: { messages: [{ id: 'msg-1' }] } };
          },
          get: async () => {
            calls.push('get');
            return {
              data: {
                id: 'msg-1',
                payload: {
                  headers: [
                    { name: 'Message-ID', value: '<msg-1@example.com>' },
                    { name: 'From', value: 'Weekly <weekly@example.com>' },
                    { name: 'Date', value: 'Sat, 16 May 2026 10:00:00 -0500' }
                  ],
                  parts: [
                    {
                      mimeType: 'text/html',
                      body: {
                        data: Buffer.from(
                          '<h2>Python</h2><a href="https://example.com">Post</a>'
                        ).toString('base64url')
                      }
                    }
                  ]
                }
              }
            };
          }
        }
      }
    };

    const messages = await new GmailClient(gmail).fetchMessages('Newsletters', { maxResults: 5 });

    expect(calls).toEqual(['list', 'get']);
    expect(messages).toEqual([
      {
        id: 'msg-1',
        messageId: '<msg-1@example.com>',
        from: 'Weekly <weekly@example.com>',
        date: '2026-05-16T15:00:00.000Z',
        subject: '',
        html: '<h2>Python</h2><a href="https://example.com">Post</a>',
        headers: {
          date: 'Sat, 16 May 2026 10:00:00 -0500',
          from: 'Weekly <weekly@example.com>',
          listId: undefined,
          messageId: '<msg-1@example.com>',
          subject: ''
        }
      }
    ]);
  });
});