from __future__ import annotations

import json
from logging import DEBUG, INFO
from unittest.mock import patch

import pytest

from dataloader.config import (
    AppSettings,
    BaseAppSettings,
    LogSettings,
    PGSettings,
    Secrets,
    WorkerSettings,
)


@pytest.mark.unit
class TestBaseAppSettings:
    """
    Unit тесты для BaseAppSettings.
    """

    def test_default_values(self):
        """
        Тест дефолтных значений.
        """
        settings = BaseAppSettings()

        assert settings.local is False
        assert settings.debug is False

    def test_protocol_returns_http_when_not_local(self):
        """
        Тест, что protocol возвращает http для не-локального режима.
        """
        with patch.dict("os.environ", {"LOCAL": "false"}):
            settings = BaseAppSettings()

            assert settings.protocol == "http"

    def test_protocol_returns_https_when_local(self):
        """
        Тест, что protocol возвращает https для локального режима.
        """
        with patch.dict("os.environ", {"LOCAL": "true"}):
            settings = BaseAppSettings()

            assert settings.protocol == "https"

    def test_loads_from_env(self):
        """
        Тест загрузки из переменных окружения.
        """
        with patch.dict("os.environ", {"LOCAL": "true", "DEBUG": "true"}):
            settings = BaseAppSettings()

            assert settings.local is True
            assert settings.debug is True


@pytest.mark.unit
class TestAppSettings:
    """
    Unit тесты для AppSettings.
    """

    def test_default_values(self):
        """
        Тест дефолтных значений.
        """
        settings = AppSettings()

        assert settings.app_host == "0.0.0.0"
        assert settings.app_port == 8081
        assert settings.kube_net_name == "AIGATEWAY"
        assert settings.timezone == "Europe/Moscow"

    def test_loads_from_env(self):
        """
        Тест загрузки из переменных окружения.
        """
        with patch.dict(
            "os.environ",
            {
                "APP_HOST": "127.0.0.1",
                "APP_PORT": "9000",
                "PROJECT_NAME": "TestProject",
                "TIMEZONE": "UTC",
            },
        ):
            settings = AppSettings()

            assert settings.app_host == "127.0.0.1"
            assert settings.app_port == 9000
            assert settings.kube_net_name == "TestProject"
            assert settings.timezone == "UTC"


@pytest.mark.unit
class TestLogSettings:
    """
    Unit тесты для LogSettings.
    """

    def test_default_values(self):
        """
        Тест дефолтных значений.
        """
        settings = LogSettings()

        assert settings.private_log_file_name == "app.log"
        assert settings.log_rotation == "10 MB"
        assert settings.private_metric_file_name == "app-metric.log"
        assert settings.private_audit_file_name == "events.log"
        assert settings.audit_host_ip == "127.0.0.1"

    def test_get_file_abs_path_joins_path_and_file(self):
        """
        Тест объединения пути и имени файла.
        """
        path = LogSettings.get_file_abs_path("/var/log/", "app.log")

        assert "app.log" in path
        assert path.startswith("var")

    def test_get_file_abs_path_handles_trailing_slashes(self):
        """
        Тест обработки слэшей в путях.
        """
        path = LogSettings.get_file_abs_path("/var/log///", "///app.log")

        assert "app.log" in path
        assert path.startswith("var")
        assert not path.startswith("/")

    def test_log_file_abs_path_property(self):
        """
        Тест свойства log_file_abs_path.
        """
        with patch.dict(
            "os.environ", {"LOG_PATH": "/var/log", "LOG_FILE_NAME": "test.log"}
        ):
            settings = LogSettings()

            assert "test.log" in settings.log_file_abs_path
            assert settings.log_file_abs_path.startswith("var")

    def test_metric_file_abs_path_property(self):
        """
        Тест свойства metric_file_abs_path.
        """
        with patch.dict(
            "os.environ",
            {"METRIC_PATH": "/var/metrics", "METRIC_FILE_NAME": "metrics.log"},
        ):
            settings = LogSettings()

            assert "metrics.log" in settings.metric_file_abs_path
            assert settings.metric_file_abs_path.startswith("var")

    def test_audit_file_abs_path_property(self):
        """
        Тест свойства audit_file_abs_path.
        """
        with patch.dict(
            "os.environ",
            {"AUDIT_LOG_PATH": "/var/audit", "AUDIT_LOG_FILE_NAME": "audit.log"},
        ):
            settings = LogSettings()

            assert "audit.log" in settings.audit_file_abs_path
            assert settings.audit_file_abs_path.startswith("var")

    def test_log_lvl_returns_debug_when_debug_enabled(self):
        """
        Тест, что log_lvl возвращает DEBUG в debug-режиме.
        """
        with patch.dict("os.environ", {"DEBUG": "true"}):
            settings = LogSettings()

            assert settings.log_lvl == DEBUG

    def test_log_lvl_returns_info_when_debug_disabled(self):
        """
        Тест, что log_lvl возвращает INFO в обычном режиме.
        """
        with patch.dict("os.environ", {"DEBUG": "false"}):
            settings = LogSettings()

            assert settings.log_lvl == INFO


@pytest.mark.unit
class TestPGSettings:
    """
    Unit тесты для PGSettings.
    """

    def test_default_values(self):
        """
        Тест дефолтных значений.
        """
        with patch.dict("os.environ", {}, clear=True):
            settings = PGSettings()

            assert settings.host == "localhost"
            assert settings.port == 5432
            assert settings.user == "postgres"
            assert settings.password == ""
            assert settings.database == "postgres"
            assert settings.schema_queue == "public"
            assert settings.use_pool is True
            assert settings.pool_size == 5
            assert settings.max_overflow == 10

    def test_url_property_returns_connection_string(self):
        """
        Тест формирования строки подключения.
        """
        with patch.dict(
            "os.environ",
            {
                "PG_HOST": "db.example.com",
                "PG_PORT": "5433",
                "PG_USER": "testuser",
                "PG_PASSWORD": "testpass",
                "PG_DATABASE": "testdb",
            },
        ):
            settings = PGSettings()

            expected = (
                "postgresql+asyncpg://testuser:testpass@db.example.com:5433/testdb"
            )
            assert settings.url == expected

    def test_url_property_with_empty_password(self):
        """
        Тест строки подключения с пустым паролем.
        """
        with patch.dict(
            "os.environ",
            {
                "PG_HOST": "localhost",
                "PG_PORT": "5432",
                "PG_USER": "postgres",
                "PG_PASSWORD": "",
                "PG_DATABASE": "testdb",
            },
        ):
            settings = PGSettings()

            expected = "postgresql+asyncpg://postgres:@localhost:5432/testdb"
            assert settings.url == expected

    def test_loads_from_env(self):
        """
        Тест загрузки из переменных окружения.
        """
        with patch.dict(
            "os.environ",
            {
                "PG_HOST": "testhost",
                "PG_PORT": "5433",
                "PG_USER": "testuser",
                "PG_PASSWORD": "testpass",
                "PG_DATABASE": "testdb",
                "PG_SCHEMA_QUEUE": "queue_schema",
                "PG_POOL_SIZE": "20",
            },
        ):
            settings = PGSettings()

            assert settings.host == "testhost"
            assert settings.port == 5433
            assert settings.user == "testuser"
            assert settings.password == "testpass"
            assert settings.database == "testdb"
            assert settings.schema_queue == "queue_schema"
            assert settings.pool_size == 20


@pytest.mark.unit
class TestWorkerSettings:
    """
    Unit тесты для WorkerSettings.
    """

    def test_default_values(self):
        """
        Тест дефолтных значений.
        """
        with patch.dict("os.environ", {"WORKERS_JSON": "[]"}, clear=True):
            settings = WorkerSettings()

            assert settings.workers_json == "[]"
            assert settings.heartbeat_sec == 10
            assert settings.default_lease_ttl_sec == 60
            assert settings.reaper_period_sec == 10
            assert settings.claim_backoff_sec == 15

    def test_parsed_workers_returns_empty_list_for_default(self):
        """
        Тест, что parsed_workers возвращает пустой список по умолчанию.
        """
        with patch.dict("os.environ", {"WORKERS_JSON": "[]"}):
            settings = WorkerSettings()

            assert settings.parsed_workers() == []

    def test_parsed_workers_parses_valid_json(self):
        """
        Тест парсинга валидного JSON.
        """
        workers_json = json.dumps(
            [
                {"queue": "queue1", "concurrency": 2},
                {"queue": "queue2", "concurrency": 3},
            ]
        )
        with patch.dict("os.environ", {"WORKERS_JSON": workers_json}):
            settings = WorkerSettings()

            workers = settings.parsed_workers()

            assert len(workers) == 2
            assert workers[0]["queue"] == "queue1"
            assert workers[0]["concurrency"] == 2
            assert workers[1]["queue"] == "queue2"
            assert workers[1]["concurrency"] == 3

    def test_parsed_workers_filters_non_dict_items(self):
        """
        Тест фильтрации не-словарей из JSON.
        """
        workers_json = json.dumps(
            [
                {"queue": "queue1", "concurrency": 2},
                "invalid_item",
                123,
                {"queue": "queue2", "concurrency": 3},
            ]
        )
        with patch.dict("os.environ", {"WORKERS_JSON": workers_json}):
            settings = WorkerSettings()

            workers = settings.parsed_workers()

            assert len(workers) == 2
            assert all(isinstance(w, dict) for w in workers)

    def test_parsed_workers_handles_invalid_json(self):
        """
        Тест обработки невалидного JSON.
        """
        with patch.dict("os.environ", {"WORKERS_JSON": "not valid json"}):
            settings = WorkerSettings()

            workers = settings.parsed_workers()

            assert workers == []

    def test_parsed_workers_handles_empty_string(self):
        """
        Тест обработки пустой строки.
        """
        with patch.dict("os.environ", {"WORKERS_JSON": ""}):
            settings = WorkerSettings()

            workers = settings.parsed_workers()

            assert workers == []

    def test_parsed_workers_handles_null_json(self):
        """
        Тест обработки null в JSON.
        """
        with patch.dict("os.environ", {"WORKERS_JSON": "null"}):
            settings = WorkerSettings()

            workers = settings.parsed_workers()

            assert workers == []


@pytest.mark.unit
class TestSecrets:
    """
    Unit тесты для Secrets.
    """

    def test_initializes_all_settings(self):
        """
        Тест, что Secrets инициализирует все настройки.
        """
        secrets = Secrets()

        assert isinstance(secrets.app, AppSettings)
        assert isinstance(secrets.log, LogSettings)
        assert isinstance(secrets.pg, PGSettings)
        assert isinstance(secrets.worker, WorkerSettings)

    def test_all_settings_have_default_values(self):
        """
        Тест, что все настройки имеют дефолтные значения.
        """
        secrets = Secrets()

        assert secrets.app.app_host == "0.0.0.0"
        assert secrets.log.private_log_file_name == "app.log"
        assert secrets.pg.host == "localhost"
        assert secrets.worker.heartbeat_sec == 10