import { describe, it, expect, beforeEach, afterAll, mock } from 'bun:test';
import { GroupSyncService } from '../../../src/services/group-sync';
import { db } from '../../../src/db';

// Store original globals
const originalFetch = globalThis.fetch;
const originalConsoleError = console.error;

describe('GroupSyncService', () => {
  let fetchMock: any;

  beforeEach(() => {
    db.exec('DELETE FROM groups');
    GroupSyncService['lastSyncAttempt'] = 0;
    
    // Setup mock fetch
    fetchMock = mock(async () => ({
      ok: true,
      json: async () => ({
        status: 'success',
        response: [
          { id: 'group1', subject: 'Group 1', linkedParent: 'test-community' },
          { id: 'group2', subject: 'Group 2', linkedParent: 'other-community' },
          { id: 'group3', subject: 'Group 3' } // No linkedParent
        ]
      })
    }));
    globalThis.fetch = fetchMock;

    // Setup env vars
    process.env.WHATSAPP_COMMUNITY_ID = 'test-community';
    process.env.EVOLUTION_API_URL = 'http://test-api';
    process.env.EVOLUTION_API_INSTANCE = 'test-instance';
    process.env.EVOLUTION_API_KEY = 'test-key';
  });

  afterAll(() => {
    globalThis.fetch = originalFetch;
  });

  describe('syncGroups', () => {
    it('should skip sync if called too soon', async () => {
      GroupSyncService['lastSyncAttempt'] = Date.now() - 1000;
      const result = await GroupSyncService.syncGroups();
      expect(result).toEqual({ added: 0, updated: 0 });
      expect(fetchMock).not.toHaveBeenCalled();
    });

    it('should throw if WHATSAPP_COMMUNITY_ID is missing', async () => {
      const consoleErrorMock = mock(() => {});
      console.error = consoleErrorMock;
      
      process.env.WHATSAPP_COMMUNITY_ID = '';
      
      await expect(GroupSyncService.syncGroups())
        .rejects.toThrow('WHATSAPP_COMMUNITY_ID is not set');
      
      expect(consoleErrorMock).toHaveBeenCalledWith(
        'Group sync failed:',
        expect.any(Error)
      );
      
      // Restore original console.error
      console.error = originalConsoleError;
    });

    it('should filter groups by community ID', async () => {
      const result = await GroupSyncService.syncGroups();
      expect(result).toEqual({
        added: 1,
        updated: 0
      });
      
      const groups = db.query('SELECT * FROM groups').all();
      expect(groups).toEqual([
        {
          id: 'group1',
          community_id: 'test-community',
          name: 'Group 1',
          active: 1,
          last_verified: expect.any(String)
        }
      ]);
    });

    it('should update existing groups', async () => {
      // Add initial group
      db.exec(
        "INSERT INTO groups (id, community_id, name, active) VALUES ('group1', 'test-community', 'Old Name', 1)"
      );

      const result = await GroupSyncService.syncGroups();
      expect(result).toEqual({
        added: 0,
        updated: 1
      });

      const group = db.query('SELECT * FROM groups WHERE id = ?').get('group1');
      expect(group).toEqual({
        id: 'group1',
        community_id: 'test-community',
        name: 'Group 1',
        active: 1,
        last_verified: expect.any(String)
      });
    });

    it('should mark non-matching groups as inactive', async () => {
      // Add initial group not in current sync
      db.exec(
        "INSERT INTO groups (id, community_id, name, active, last_verified) VALUES ('old-group', 'test-community', 'Old Group', 1, '2023-01-01')"
      );

      await GroupSyncService.syncGroups();
      const group = db.query('SELECT * FROM groups WHERE id = ?').get('old-group');
      expect(group).toEqual({
        id: 'old-group',
        community_id: 'test-community',
        name: 'Old Group',
        active: 0,
        last_verified: expect.any(String)
      });
      expect(group.last_verified).not.toBe('2023-01-01'); // Should be updated
    });

    it('should handle API errors', async () => {
      globalThis.fetch = mock(async () => ({
        ok: false,
        statusText: 'Not Found',
        json: async () => ({ status: 'error', message: 'Not Found' })
      }));
      await expect(GroupSyncService.syncGroups()).rejects.toThrow('API request failed: Not Found');
    });
  });
});