"""
环境迁移功能测试

测试Virtualenv到Docker和Docker到Virtualenv的环境迁移功能
"""

import unittest
from pathlib import Path
import tempfile
import sys

sys.path.insert(0, str(Path(__file__).parent.parent.parent))

from ptest.isolation.environment_migration import (
    MigrationProgress,
    SnapshotCrossEngineConverter,
    migrate_environment,
)

from ptest.isolation.basic_engine import BasicIsolationEngine


class MockSourceEngine(BasicIsolationEngine):
    """模拟源引擎"""

    def __init__(self):
        super().__init__(
            {
                "engine_type": "virtualenv",
                "test_mode": True,
            }
        )
        self.engine_type = "virtualenv"
        self.environments = {}
        self.created_snapshots = []
        self.installed_packages = {}


class MockTargetEngine(BasicIsolationEngine):
    """模拟目标引擎"""

    def __init__(self):
        super().__init__(
            {
                "engine_type": "docker",
                "test_mode": True,
            }
        )
        self.engine_type = "docker"
        self.environments = {}
        self.created_snapshots = []
        self.installed_packages = {}


class TestEnvironmentMigration(unittest.TestCase):
    """环境迁移测试"""

    def setUp(self):
        self.source_engine = MockSourceEngine()
        self.target_engine = MockTargetEngine()
        self.temp_dir = Path(tempfile.mkdtemp())

    def test_virtualenv_to_docker_migration(self):
        """测试从Virtualenv到Docker的迁移"""
        source_engine = MockSourceEngine()
        source_engine.engine_type = "virtualenv"

        target_engine = MockTargetEngine()
        target_engine.engine_type = "docker"

        result = migrate_environment(
            source_engine=source_engine,
            target_engine=target_engine,
            source_env_id="test_env",
            target_env_id="migrated_env",
        )

        self.assertIn("success", result)

    def test_docker_to_virtualenv_migration(self):
        """测试从Docker到Virtualenv的迁移"""
        source_engine = MockSourceEngine()
        source_engine.engine_type = "docker"

        target_engine = MockTargetEngine()
        target_engine.engine_type = "virtualenv"

        result = migrate_environment(
            source_engine=source_engine,
            target_engine=target_engine,
            source_env_id="test_env",
            target_env_id="migrated_env",
        )

        self.assertIn("success", result)

    def test_migration_error_handling(self):
        """测试迁移错误处理"""
        result = migrate_environment(
            source_engine=self.source_engine,
            target_engine=self.target_engine,
            source_env_id="nonexistent_env",
            target_env_id="target_env",
        )
        self.assertFalse(result.get("success", True))

    def test_snapshot_cross_engine_conversion(self):
        """测试快照跨引擎转换"""
        converter = SnapshotCrossEngineConverter(
            source_engine=self.source_engine,
            target_engine=self.target_engine,
        )
        self.assertIsNotNone(converter)

    def test_package_compatibility_validation(self):
        """测试包兼容性验证"""
        pass

    def test_progress_tracking(self):
        """测试进度跟踪"""
        progress = MigrationProgress()
        progress.start(total_steps=5)
        self.assertEqual(progress._total_steps, 5)

        progress.update_step("test_step")
        self.assertEqual(progress._current_step, "test_step")

        progress.complete_step()
        self.assertEqual(progress._completed_steps, 1)

        result = progress.finish(success=True)
        self.assertIsInstance(result, float)


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