import unittest
from unittest.mock import patch, mock_open

import yaml

from dependabro.utils import get_terraform_modules


class TestGetTerraformModules(unittest.TestCase):

    @patch(
        "builtins.open",
        new_callable=mock_open,
        read_data="modules:\n  - module1\n  - module2\n",
    )
    @patch(
        "dependabro.utils.yaml.safe_load",
        return_value={"modules": ["module1", "module2"]},
    )
    def test_returns_modules_from_valid_config(self, mock_yaml_load, mock_file):
        success, modules = get_terraform_modules("/path/to/config.yaml")
        self.assertTrue(success)
        self.assertEqual(modules, ["module1", "module2"])

    @patch("builtins.open", new_callable=mock_open, read_data="modules: []\n")
    @patch("dependabro.utils.yaml.safe_load", return_value={"modules": []})
    def test_handles_empty_modules_list(self, mock_yaml_load, mock_file):
        with self.assertLogs(level="WARNING") as log:
            success, modules = get_terraform_modules("/path/to/config.yaml")
        self.assertTrue(success)
        self.assertEqual(modules, [])
        self.assertIn("No modules found in the configuration file", log.output[0])

    @patch("builtins.open", new_callable=mock_open)
    @patch("dependabro.utils.yaml.safe_load", side_effect=yaml.YAMLError)
    def test_handles_yaml_load_error(self, mock_yaml_load, mock_file):
        with self.assertLogs(level="ERROR") as log:
            success, modules = get_terraform_modules("/path/to/config.yaml")
        self.assertFalse(success)
        self.assertEqual(modules, [])
        self.assertIn("Error reading configuration file", log.output[0])

    @patch("builtins.open", side_effect=IOError("File not found"))
    def test_handles_file_not_found_error(self, mock_file):
        with self.assertLogs(level="ERROR") as log:
            success, modules = get_terraform_modules("/path/to/config.yaml")
        self.assertFalse(success)
        self.assertEqual(modules, [])
        self.assertIn("Error reading configuration file", log.output[0])


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