"""Tests for JSON converter."""

import json
import pytest
import tempfile
import os

from config_convert.converters import JSONConverter


class TestJSONConverter:
    @pytest.fixture
    def converter(self):
        return JSONConverter()

    def test_loads_valid_json(self, converter):
        data = '{"name": "test", "value": 123}'
        result = converter.loads(data)
        assert result == {"name": "test", "value": 123}

    def test_loads_nested_json(self, converter):
        data = '{"database": {"host": "localhost", "port": 5432}}'
        result = converter.loads(data)
        assert result == {"database": {"host": "localhost", "port": 5432}}

    def test_loads_array_json(self, converter):
        data = '{"tags": ["a", "b", "c"]}'
        result = converter.loads(data)
        assert result == {"tags": ["a", "b", "c"]}

    def test_dumps_basic_dict(self, converter):
        data = {"name": "test", "value": 123}
        result = converter.dumps(data)
        parsed = json.loads(result)
        assert parsed == data

    def test_dumps_with_custom_indent(self, converter):
        data = {"name": "test"}
        result = converter.dumps(data, indent=4)
        assert "\n" in result

    def test_dumps_nested_dict(self, converter):
        data = {"database": {"host": "localhost", "port": 5432}}
        result = converter.dumps(data)
        parsed = json.loads(result)
        assert parsed == data

    def test_roundtrip(self, converter):
        original = {"name": "test", "version": "1.0.0", "enabled": True, "count": 42}
        dumped = converter.dumps(original)
        loaded = converter.loads(dumped)
        assert loaded == original

    def test_load_file(self, converter, temp_file, sample_json):
        gen = temp_file(json.dumps(sample_json), suffix=".json")
        path = next(gen)
        try:
            result = converter.load(path)
            assert result == sample_json
        finally:
            import os
            os.unlink(path)

    def test_dump_file(self, converter, temp_dir, sample_json):
        path = tempfile.mktemp(suffix=".json")
        try:
            converter.dump(sample_json, path)
            result = json.loads(open(path).read())
            assert result == sample_json
        finally:
            if os.path.exists(path):
                os.unlink(path)

    def test_invalid_json_raises(self, converter):
        with pytest.raises(json.JSONDecodeError):
            converter.loads("{invalid json}")