from textwrap import dedent

import pytest
from yaml import YAMLError

from core.tools.utils.yaml_utils import load_yaml_file

EXAMPLE_YAML_FILE = 'example_yaml.yaml'
INVALID_YAML_FILE = 'invalid_yaml.yaml'
NON_EXISTING_YAML_FILE = 'non_existing_file.yaml'


@pytest.fixture
def prepare_example_yaml_file(tmp_path, monkeypatch) -> str:
    monkeypatch.chdir(tmp_path)
    file_path = tmp_path.joinpath(EXAMPLE_YAML_FILE)
    file_path.write_text(dedent(
        """\
        address:
            city: Example City
            country: Example Country
        age: 30
        gender: male
        languages:
            - Python
            - Java
            - C++
        empty_key:
        """))
    return str(file_path)


@pytest.fixture
def prepare_invalid_yaml_file(tmp_path, monkeypatch) -> str:
    monkeypatch.chdir(tmp_path)
    file_path = tmp_path.joinpath(INVALID_YAML_FILE)
    file_path.write_text(dedent(
        """\
        address:
                   city: Example City
            country: Example Country
        age: 30
        gender: male
        languages:
        - Python
        - Java
        - C++
        """))
    return str(file_path)


def test_load_yaml_non_existing_file():
    assert load_yaml_file(file_path=NON_EXISTING_YAML_FILE) == {}
    assert load_yaml_file(file_path='') == {}


def test_load_valid_yaml_file(prepare_example_yaml_file):
    yaml_data = load_yaml_file(file_path=prepare_example_yaml_file)
    assert len(yaml_data) > 0
    assert yaml_data['age'] == 30
    assert yaml_data['gender'] == 'male'
    assert yaml_data['address']['city'] == 'Example City'
    assert set(yaml_data['languages']) == {'Python', 'Java', 'C++'}
    assert yaml_data.get('empty_key') is None
    assert yaml_data.get('non_existed_key') is None


def test_load_invalid_yaml_file(prepare_invalid_yaml_file):
    # yaml syntax error
    with pytest.raises(YAMLError):
        load_yaml_file(file_path=prepare_invalid_yaml_file)

    # ignore error
    assert load_yaml_file(file_path=prepare_invalid_yaml_file, ignore_error=True) == {}