import unittest
from unittest.mock import patch, MagicMock
import web  # 假设你的Flask app文件命名为web.py


class StartCallTestCase(unittest.TestCase):

    def setUp(self):
        self.app = app.test_client()
        self.app.testing = True

    @patch('web.pymysql.connect')  # 模拟数据库连接
    def test_start_call_rendering(self, mock_connect):
        # 模拟数据库返回的数据
        mock_cursor = MagicMock()
        mock_cursor.fetchall.return_value = [
            {'id': 1, 'name': 'Alice', 'points': 10.0},
            {'id': 2, 'name': 'Bob', 'points': 5.0},
            {'id': 3, 'name': 'Charlie', 'points': 2.0}
        ]
        mock_connect.return_value.cursor.return_value = mock_cursor

        # 发送GET请求到/start_call
        response = self.app.get('/start_call')

        # 验证响应状态
        self.assertEqual(response.status_code, 200)

        # 验证是否渲染了正确的内容
        response_text = response.get_data(as_text=True)
        self.assertIn('pstuents', response_text)  # 检查渲染内容

    @patch('web.pymysql.connect')  # 模拟数据库连接
    def test_weighted_random_selection(self, mock_connect):
        # 模拟数据库返回的数据
        mock_cursor = MagicMock()
        mock_cursor.fetchall.return_value = [
            {'id': 1, 'name': 'Alice', 'points': 10.0},  # Alice的权重最低
            {'id': 2, 'name': 'Bob', 'points': 5.0},  # Bob的权重次之
            {'id': 3, 'name': 'Charlie', 'points': 2.0}  # Charlie的权重最高
        ]
        mock_connect.return_value.cursor.return_value = mock_cursor

        # 存储选择结果的字典
        selection_count = {'Alice': 0, 'Bob': 0, 'Charlie': 0}

        # 进行多次调用来验证随机性
        for _ in range(100):
            response = self.app.get('/start_call')
            response_text = response.get_data(as_text=True)

            # 统计每个学生的选择次数
            if 'Alice' in response_text:
                selection_count['Alice'] += 1
            elif 'Bob' in response_text:
                selection_count['Bob'] += 1
            elif 'Charlie' in response_text:
                selection_count['Charlie'] += 1

        # 验证选择的相对概率
        self.assertTrue(selection_count['Charlie'] > selection_count['Bob'])
        self.assertTrue(selection_count['Bob'] > selection_count['Alice'])


if __name__ == '__main__':
    unittest.main()