"""Tests for locale file parsing module."""
import json
import tempfile
from pathlib import Path

import pytest
import yaml


class TestLocaleParser:
    """Tests for LocaleParser class."""

    def test_parse_json_file(self, locale_parser, sample_locale_json):
        """Test parsing a JSON locale file."""
        with tempfile.NamedTemporaryFile(mode="w", suffix=".json", delete=False) as f:
            json.dump(sample_locale_json, f)
            f.flush()
            f_path = f.name

            data = locale_parser.parse_file(f_path)

            assert data["hello"] == "Hello"
            assert data["goodbye"] == "Goodbye"

            Path(f_path).unlink()

    def test_parse_yaml_file(self, locale_parser, sample_locale_yaml):
        """Test parsing a YAML locale file."""
        with tempfile.NamedTemporaryFile(mode="w", suffix=".yaml", delete=False) as f:
            yaml.dump(sample_locale_yaml, f)
            f.flush()
            f_path = f.name

            data = locale_parser.parse_file(f_path)

            assert data["hello"] == "Hello"
            assert data["nested"]["key"] == "Nested value"

            Path(f_path).unlink()

    def test_parse_invalid_format(self, locale_parser):
        """Test parsing an invalid file format raises error."""
        with tempfile.NamedTemporaryFile(mode="w", suffix=".txt", delete=False) as f:
            f.write("some content")
            f.flush()
            f_path = f.name

            with pytest.raises(ValueError, match="Unsupported locale file format"):
                locale_parser.parse_file(f_path)

            Path(f_path).unlink()

    def test_get_all_keys_flat(self, locale_parser):
        """Test getting all keys from flat dictionary."""
        data = {
            "hello": "Hello",
            "goodbye": "Goodbye",
            "welcome": "Welcome",
        }

        keys = locale_parser.get_all_keys(data)

        assert keys == {"hello", "goodbye", "welcome"}

    def test_get_all_keys_nested(self, locale_parser):
        """Test getting all keys from nested dictionary."""
        data = {
            "user": {
                "login": "Login",
                "register": "Register",
                "profile": {
                    "name": "Name",
                    "email": "Email",
                },
            },
            "common": "Common",
        }

        keys = locale_parser.get_all_keys(data)

        assert "user.login" in keys
        assert "user.register" in keys
        assert "user.profile.name" in keys
        assert "user.profile.email" in keys
        assert "common" in keys
        assert len(keys) == 5

    def test_flatten_keys(self, locale_parser):
        """Test flattening nested keys to dot notation."""
        data = {
            "user": {
                "login": "Login",
                "profile": {
                    "name": "Name",
                },
            },
        }

        flattened = locale_parser.flatten_keys(data)

        assert flattened == {
            "user.login": "Login",
            "user.profile.name": "Name",
        }

    def test_unflatten_keys(self, locale_parser):
        """Test unflattening dot notation keys to nested dictionary."""
        data = {
            "user.login": "Login",
            "user.profile.name": "Name",
        }

        nested = locale_parser.unflatten_keys(data)

        assert nested == {
            "user": {
                "login": "Login",
                "profile": {
                    "name": "Name",
                },
            },
        }

    def test_add_key_flat(self, locale_parser):
        """Test adding a flat key."""
        data = {"existing": "value"}

        result = locale_parser.add_key(data, "new_key", "new_value")

        assert result["existing"] == "value"
        assert result["new_key"] == "new_value"

    def test_add_key_nested(self, locale_parser):
        """Test adding a nested key."""
        data = {"user": {}}

        result = locale_parser.add_key(data, "user.profile.name", "Name")

        assert result["user"]["profile"]["name"] == "Name"

    def test_get_value_existing(self, locale_parser):
        """Test getting an existing value."""
        data = {
            "user": {
                "name": "John",
            },
        }

        value = locale_parser.get_value(data, "user.name")

        assert value == "John"

    def test_get_value_nonexistent(self, locale_parser):
        """Test getting a nonexistent value returns None."""
        data = {"hello": "Hello"}

        value = locale_parser.get_value(data, "goodbye")

        assert value is None

    def test_parse_directory(self, locale_parser, temp_locale_dir):
        """Test parsing all locale files in a directory."""
        locale_keys = locale_parser.parse_directory(str(temp_locale_dir))

        assert "en" in locale_keys
        assert "es" in locale_keys
        assert "hello" in locale_keys["en"]
        assert "unused_key" in locale_keys["en"]

    def test_parse_directory_with_filter(self, locale_parser, temp_locale_dir):
        """Test parsing directory with locale filter."""
        locale_keys = locale_parser.parse_directory(str(temp_locale_dir), ["en"])

        assert "en" in locale_keys
        assert "es" not in locale_keys

    def test_parse_directory_nonexistent(self, locale_parser):
        """Test parsing nonexistent directory returns empty dict."""
        locale_keys = locale_parser.parse_directory("/nonexistent")

        assert locale_keys == {}

    def test_write_json_file(self, locale_parser, tmp_path):
        """Test writing JSON locale file."""
        data = {"hello": "Hello", "goodbye": "Goodbye"}
        output_file = tmp_path / "output.json"

        locale_parser.write_file(output_file, data, "json")

        assert output_file.exists()
        written_data = json.loads(output_file.read_text())
        assert written_data == data

    def test_write_yaml_file(self, locale_parser, tmp_path):
        """Test writing YAML locale file."""
        data = {"hello": "Hello", "goodbye": "Goodbye"}
        output_file = tmp_path / "output.yaml"

        locale_parser.write_file(output_file, data, "yaml")

        assert output_file.exists()
        written_data = yaml.safe_load(output_file.read_text())
        assert written_data == data

    def test_caching(self, locale_parser, sample_locale_json):
        """Test that parsed files are cached."""
        with tempfile.NamedTemporaryFile(mode="w", suffix=".json", delete=False) as f:
            json.dump(sample_locale_json, f)
            f.flush()
            f_path = f.name

            data1 = locale_parser.parse_file(f_path)
            data2 = locale_parser.parse_file(f_path)

            assert data1 is data2

            Path(f_path).unlink()