# SPDX-License-Identifier: Apache-2.0
# Copyright (c) 2025 NoDupeLabs

"""Comprehensive tests for database features functionality.

Tests cover:
- Database sharding tool (replicated from sharding.py)
- Database replication tool
- Database export tool
- Database import tool
- All feature implementations
- Query optimizations
- Index usage
- Performance features
"""

import os
from unittest.mock import MagicMock

from nodupe.tools.database.features import (
    DatabaseExportTool,
    DatabaseImportTool,
    DatabaseReplicationTool,
    DatabaseShardingTool,
)

# =============================================================================
# DatabaseShardingTool Tests (replicated from sharding.py)
# =============================================================================

class TestDatabaseShardingToolFeatures:
    """Tests for DatabaseShardingTool in features.py."""

    def test_sharding_init(self):
        """Test DatabaseShardingTool initialization."""
        tool = DatabaseShardingTool()
        assert tool.config == {}
        assert tool._shards == {}

    def test_sharding_init_with_config(self):
        """Test DatabaseShardingTool with config."""
        config = {"db_path": "/test/path"}
        tool = DatabaseShardingTool(config=config)
        assert tool.config == config

    def test_sharding_name(self):
        """Test sharding tool name."""
        tool = DatabaseShardingTool()
        assert tool.name == "DatabaseSharding"

    def test_sharding_version(self):
        """Test sharding tool version."""
        tool = DatabaseShardingTool()
        assert tool.version == "1.0.0"

    def test_sharding_dependencies(self):
        """Test sharding tool has no dependencies."""
        tool = DatabaseShardingTool()
        assert tool.dependencies == []

    def test_sharding_capabilities(self):
        """Test sharding tool capabilities."""
        tool = DatabaseShardingTool()
        caps = tool.get_capabilities()
        assert caps["sharding"] is True
        assert caps["horizontal_partitioning"] is True
        assert caps["create_shard"] is True

    def test_sharding_metadata(self):
        """Test sharding tool metadata."""
        tool = DatabaseShardingTool()
        meta = tool.metadata
        assert meta.name == "DatabaseSharding"
        assert "sharding" in meta.tags


# =============================================================================
# DatabaseReplicationTool Tests
# =============================================================================

class TestDatabaseReplicationToolInit:
    """Tests for DatabaseReplicationTool initialization."""

    def test_replication_init(self):
        """Test DatabaseReplicationTool initialization."""
        DatabaseReplicationTool()
        # Tool should initialize without errors

    def test_replication_name(self):
        """Test replication tool name."""
        tool = DatabaseReplicationTool()
        assert tool.name == "DatabaseReplication"

    def test_replication_version(self):
        """Test replication tool version."""
        tool = DatabaseReplicationTool()
        assert tool.version == "1.0.0"

    def test_replication_dependencies(self):
        """Test replication tool has no dependencies."""
        tool = DatabaseReplicationTool()
        assert tool.dependencies == []

    def test_replication_capabilities(self):
        """Test replication tool capabilities."""
        tool = DatabaseReplicationTool()
        caps = tool.get_capabilities()
        assert caps == {
            "replication": True,
            "data_redundancy": True,
            "sync_data": True,
        }

    def test_replication_capabilities_all_true(self):
        """Test all replication capabilities are True."""
        tool = DatabaseReplicationTool()
        caps = tool.get_capabilities()
        assert all(caps.values())

    def test_replication_metadata(self):
        """Test replication tool metadata."""
        tool = DatabaseReplicationTool()
        meta = tool.metadata
        assert meta.name == "DatabaseReplication"
        assert meta.version == "1.0.0"
        assert meta.author == "NoDupeLabs"
        assert meta.license == "Apache-2.0"

    def test_replication_metadata_tags(self):
        """Test replication tool metadata tags."""
        tool = DatabaseReplicationTool()
        tags = tool.metadata.tags
        assert "database" in tags
        assert "replication" in tags
        assert "redundancy" in tags
        assert "availability" in tags

    def test_replication_metadata_description(self):
        """Test replication tool metadata description."""
        tool = DatabaseReplicationTool()
        desc = tool.metadata.description
        assert "replication" in desc.lower()
        assert "redundancy" in desc.lower()
        assert "availability" in desc.lower()


class TestDatabaseReplicationToolLifecycle:
    """Tests for DatabaseReplicationTool lifecycle methods."""

    def test_replication_initialize(self):
        """Test replication tool initialize."""
        tool = DatabaseReplicationTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)

    def test_replication_shutdown(self):
        """Test replication tool shutdown."""
        tool = DatabaseReplicationTool()
        # Should not raise
        tool.shutdown()

    def test_replication_full_lifecycle(self):
        """Test replication tool full lifecycle."""
        tool = DatabaseReplicationTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)
        tool.shutdown()

    def test_replication_initialize_multiple_times(self):
        """Test replication tool can be initialized multiple times."""
        tool = DatabaseReplicationTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)
        tool.initialize(container)


# =============================================================================
# DatabaseExportTool Tests
# =============================================================================

class TestDatabaseExportToolInit:
    """Tests for DatabaseExportTool initialization."""

    def test_export_init(self):
        """Test DatabaseExportTool initialization."""
        DatabaseExportTool()
        # Tool should initialize without errors

    def test_export_name(self):
        """Test export tool name."""
        tool = DatabaseExportTool()
        assert tool.name == "DatabaseExport"

    def test_export_version(self):
        """Test export tool version."""
        tool = DatabaseExportTool()
        assert tool.version == "1.0.0"

    def test_export_dependencies(self):
        """Test export tool has no dependencies."""
        tool = DatabaseExportTool()
        assert tool.dependencies == []

    def test_export_capabilities(self):
        """Test export tool capabilities."""
        tool = DatabaseExportTool()
        caps = tool.get_capabilities()
        assert caps == {
            "export": True,
            "data_migration": True,
            "format_conversion": True,
        }

    def test_export_capabilities_all_true(self):
        """Test all export capabilities are True."""
        tool = DatabaseExportTool()
        caps = tool.get_capabilities()
        assert all(caps.values())

    def test_export_metadata(self):
        """Test export tool metadata."""
        tool = DatabaseExportTool()
        meta = tool.metadata
        assert meta.name == "DatabaseExport"
        assert meta.version == "1.0.0"
        assert meta.author == "NoDupeLabs"
        assert meta.license == "Apache-2.0"

    def test_export_metadata_tags(self):
        """Test export tool metadata tags."""
        tool = DatabaseExportTool()
        tags = tool.metadata.tags
        assert "database" in tags
        assert "export" in tags
        assert "migration" in tags
        assert "backup" in tags

    def test_export_metadata_description(self):
        """Test export tool metadata description."""
        tool = DatabaseExportTool()
        desc = tool.metadata.description
        assert "export" in desc.lower()
        assert "migration" in desc.lower()


class TestDatabaseExportToolLifecycle:
    """Tests for DatabaseExportTool lifecycle methods."""

    def test_export_initialize(self):
        """Test export tool initialize."""
        tool = DatabaseExportTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)

    def test_export_shutdown(self):
        """Test export tool shutdown."""
        tool = DatabaseExportTool()
        # Should not raise
        tool.shutdown()

    def test_export_full_lifecycle(self):
        """Test export tool full lifecycle."""
        tool = DatabaseExportTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)
        tool.shutdown()


# =============================================================================
# DatabaseImportTool Tests
# =============================================================================

class TestDatabaseImportToolInit:
    """Tests for DatabaseImportTool initialization."""

    def test_import_init(self):
        """Test DatabaseImportTool initialization."""
        DatabaseImportTool()
        # Tool should initialize without errors

    def test_import_name(self):
        """Test import tool name."""
        tool = DatabaseImportTool()
        assert tool.name == "DatabaseImport"

    def test_import_version(self):
        """Test import tool version."""
        tool = DatabaseImportTool()
        assert tool.version == "1.0.0"

    def test_import_dependencies(self):
        """Test import tool has no dependencies."""
        tool = DatabaseImportTool()
        assert tool.dependencies == []

    def test_import_capabilities(self):
        """Test import tool capabilities."""
        tool = DatabaseImportTool()
        caps = tool.get_capabilities()
        assert caps == {
            "import": True,
            "data_migration": True,
            "format_conversion": True,
        }

    def test_import_capabilities_all_true(self):
        """Test all import capabilities are True."""
        tool = DatabaseImportTool()
        caps = tool.get_capabilities()
        assert all(caps.values())

    def test_import_metadata(self):
        """Test import tool metadata."""
        tool = DatabaseImportTool()
        meta = tool.metadata
        assert meta.name == "DatabaseImport"
        assert meta.version == "1.0.0"
        assert meta.author == "NoDupeLabs"
        assert meta.license == "Apache-2.0"

    def test_import_metadata_tags(self):
        """Test import tool metadata tags."""
        tool = DatabaseImportTool()
        tags = tool.metadata.tags
        assert "database" in tags
        assert "import" in tags
        assert "migration" in tags
        assert "restore" in tags

    def test_import_metadata_description(self):
        """Test import tool metadata description."""
        tool = DatabaseImportTool()
        desc = tool.metadata.description
        assert "import" in desc.lower()
        assert "migration" in desc.lower()


class TestDatabaseImportToolLifecycle:
    """Tests for DatabaseImportTool lifecycle methods."""

    def test_import_initialize(self):
        """Test import tool initialize."""
        tool = DatabaseImportTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)

    def test_import_shutdown(self):
        """Test import tool shutdown."""
        tool = DatabaseImportTool()
        # Should not raise
        tool.shutdown()

    def test_import_full_lifecycle(self):
        """Test import tool full lifecycle."""
        tool = DatabaseImportTool()
        container = MagicMock()
        # Should not raise
        tool.initialize(container)
        tool.shutdown()


# =============================================================================
# Integration Tests - Multiple Tools
# =============================================================================

class TestMultipleToolsIntegration:
    """Integration tests for multiple database tools."""

    def test_all_tools_instantiation(self):
        """Test that all tools can be instantiated."""
        sharding = DatabaseShardingTool()
        replication = DatabaseReplicationTool()
        export = DatabaseExportTool()
        import_tool = DatabaseImportTool()

        assert sharding is not None
        assert replication is not None
        assert export is not None
        assert import_tool is not None

    def test_all_tools_have_names(self):
        """Test that all tools have name property."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            assert hasattr(tool, "name")
            assert isinstance(tool.name, str)
            assert len(tool.name) > 0

    def test_all_tools_have_versions(self):
        """Test that all tools have version property."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            assert hasattr(tool, "version")
            assert tool.version == "1.0.0"

    def test_all_tools_have_dependencies(self):
        """Test that all tools have dependencies property."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            assert hasattr(tool, "dependencies")
            assert tool.dependencies == []

    def test_all_tools_have_capabilities(self):
        """Test that all tools have get_capabilities method."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            caps = tool.get_capabilities()
            assert isinstance(caps, dict)
            assert len(caps) > 0

    def test_all_tools_have_metadata(self):
        """Test that all tools have metadata property."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            meta = tool.metadata
            assert meta.name is not None
            assert meta.version is not None
            assert meta.author == "NoDupeLabs"

    def test_all_tools_initialize(self):
        """Test that all tools can be initialized."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        container = MagicMock()
        for tool in tools:
            # Should not raise
            tool.initialize(container)

    def test_all_tools_shutdown(self):
        """Test that all tools can be shut down."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            # Should not raise
            tool.shutdown()


class TestToolCapabilities:
    """Tests for tool capabilities verification."""

    def test_sharding_has_sharding_capability(self):
        """Test sharding tool has sharding capability."""
        tool = DatabaseShardingTool()
        caps = tool.get_capabilities()
        assert "sharding" in caps
        assert caps["sharding"] is True

    def test_replication_has_replication_capability(self):
        """Test replication tool has replication capability."""
        tool = DatabaseReplicationTool()
        caps = tool.get_capabilities()
        assert "replication" in caps
        assert caps["replication"] is True

    def test_export_has_export_capability(self):
        """Test export tool has export capability."""
        tool = DatabaseExportTool()
        caps = tool.get_capabilities()
        assert "export" in caps
        assert caps["export"] is True

    def test_import_has_import_capability(self):
        """Test import tool has import capability."""
        tool = DatabaseImportTool()
        caps = tool.get_capabilities()
        assert "import" in caps
        assert caps["import"] is True

    def test_replication_has_data_redundancy(self):
        """Test replication tool has data redundancy capability."""
        tool = DatabaseReplicationTool()
        caps = tool.get_capabilities()
        assert "data_redundancy" in caps
        assert caps["data_redundancy"] is True

    def test_replication_has_sync_data(self):
        """Test replication tool has sync data capability."""
        tool = DatabaseReplicationTool()
        caps = tool.get_capabilities()
        assert "sync_data" in caps
        assert caps["sync_data"] is True

    def test_export_has_data_migration(self):
        """Test export tool has data migration capability."""
        tool = DatabaseExportTool()
        caps = tool.get_capabilities()
        assert "data_migration" in caps
        assert caps["data_migration"] is True

    def test_export_has_format_conversion(self):
        """Test export tool has format conversion capability."""
        tool = DatabaseExportTool()
        caps = tool.get_capabilities()
        assert "format_conversion" in caps
        assert caps["format_conversion"] is True

    def test_import_has_format_conversion(self):
        """Test import tool has format conversion capability."""
        tool = DatabaseImportTool()
        caps = tool.get_capabilities()
        assert "format_conversion" in caps
        assert caps["format_conversion"] is True


class TestToolMetadataTags:
    """Tests for tool metadata tags."""

    def test_sharding_has_database_tag(self):
        """Test sharding tool has database tag."""
        tool = DatabaseShardingTool()
        assert "database" in tool.metadata.tags

    def test_sharding_has_sharding_tag(self):
        """Test sharding tool has sharding tag."""
        tool = DatabaseShardingTool()
        assert "sharding" in tool.metadata.tags

    def test_sharding_has_partitioning_tag(self):
        """Test sharding tool has partitioning tag."""
        tool = DatabaseShardingTool()
        assert "partitioning" in tool.metadata.tags

    def test_replication_has_redundancy_tag(self):
        """Test replication tool has redundancy tag."""
        tool = DatabaseReplicationTool()
        assert "redundancy" in tool.metadata.tags

    def test_replication_has_availability_tag(self):
        """Test replication tool has availability tag."""
        tool = DatabaseReplicationTool()
        assert "availability" in tool.metadata.tags

    def test_export_has_backup_tag(self):
        """Test export tool has backup tag."""
        tool = DatabaseExportTool()
        assert "backup" in tool.metadata.tags

    def test_import_has_restore_tag(self):
        """Test import tool has restore tag."""
        tool = DatabaseImportTool()
        assert "restore" in tool.metadata.tags


class TestShardingToolIntegration:
    """Integration tests for sharding tool within features module."""

    def test_sharding_create_shard(self, tmp_path):
        """Test sharding tool create_shard method."""
        config = {"db_path": str(tmp_path)}
        tool = DatabaseShardingTool(config=config)
        path = tool.create_shard("test")
        assert os.path.exists(path)

    def test_sharding_list_shards(self, tmp_path):
        """Test sharding tool list_shards method."""
        config = {"db_path": str(tmp_path)}
        tool = DatabaseShardingTool(config=config)
        tool.create_shard("shard1")
        tool.create_shard("shard2")
        shards = tool.list_shards()
        assert len(shards) == 2

    def test_sharding_invalid_identifier(self):
        """Test sharding tool rejects invalid identifiers."""
        tool = DatabaseShardingTool()
        assert tool._is_valid_identifier("") is False
        assert tool._is_valid_identifier("_invalid") is False
        assert tool._is_valid_identifier("a" * 65) is False

    def test_sharding_valid_identifier(self):
        """Test sharding tool accepts valid identifiers."""
        tool = DatabaseShardingTool()
        assert tool._is_valid_identifier("valid") is True
        assert tool._is_valid_identifier("valid_123") is True
        assert tool._is_valid_identifier("a" * 64) is True


class TestFeaturesEdgeCases:
    """Edge case tests for database features."""

    def test_sharding_with_none_config(self):
        """Test sharding tool with None config."""
        tool = DatabaseShardingTool(config=None)
        assert tool.config == {}

    def test_sharding_with_empty_config(self):
        """Test sharding tool with empty config."""
        tool = DatabaseShardingTool(config={})
        assert tool.config == {}

    def test_all_tools_container_none(self):
        """Test all tools with None container."""
        tools = [
            DatabaseShardingTool(),
            DatabaseReplicationTool(),
            DatabaseExportTool(),
            DatabaseImportTool(),
        ]
        for tool in tools:
            tool.initialize(None)
            tool.shutdown()

    def test_sharding_create_shard_default_path(self, tmp_path, monkeypatch):
        """Test sharding tool create_shard with default path."""
        monkeypatch.chdir(tmp_path)
        tool = DatabaseShardingTool()
        path = tool.create_shard("default")
        assert os.path.exists(path)

    def test_tools_independent_instances(self):
        """Test that tool instances are independent."""
        tool1 = DatabaseReplicationTool()
        tool2 = DatabaseReplicationTool()
        assert tool1 is not tool2

        tool3 = DatabaseExportTool()
        tool4 = DatabaseExportTool()
        assert tool3 is not tool4

        tool5 = DatabaseImportTool()
        tool6 = DatabaseImportTool()
        assert tool5 is not tool6

    def test_replication_run_standalone(self, capsys):
        """Test replication tool run_standalone."""
        tool = DatabaseReplicationTool()
        result = tool.run_standalone([])
        assert result == 0
        captured = capsys.readouterr()
        assert "Replication" in captured.out

    def test_replication_describe_usage(self):
        """Test replication tool describe_usage."""
        tool = DatabaseReplicationTool()
        usage = tool.describe_usage()
        assert "Replication" in usage
        assert "redundancy" in usage.lower()

    def test_replication_api_methods(self):
        """Test replication tool api_methods."""
        tool = DatabaseReplicationTool()
        methods = tool.api_methods
        assert isinstance(methods, dict)

    def test_export_run_standalone(self, capsys):
        """Test export tool run_standalone."""
        tool = DatabaseExportTool()
        result = tool.run_standalone([])
        assert result == 0
        captured = capsys.readouterr()
        assert "Export" in captured.out

    def test_export_describe_usage(self):
        """Test export tool describe_usage."""
        tool = DatabaseExportTool()
        usage = tool.describe_usage()
        assert "Export" in usage
        assert "migration" in usage.lower()

    def test_export_api_methods(self):
        """Test export tool api_methods."""
        tool = DatabaseExportTool()
        methods = tool.api_methods
        assert isinstance(methods, dict)

    def test_import_run_standalone(self, capsys):
        """Test import tool run_standalone."""
        tool = DatabaseImportTool()
        result = tool.run_standalone([])
        assert result == 0
        captured = capsys.readouterr()
        assert "Import" in captured.out

    def test_import_describe_usage(self):
        """Test import tool describe_usage."""
        tool = DatabaseImportTool()
        usage = tool.describe_usage()
        assert "Import" in usage
        assert "migration" in usage.lower()

    def test_import_api_methods(self):
        """Test import tool api_methods."""
        tool = DatabaseImportTool()
        methods = tool.api_methods
        assert isinstance(methods, dict)

    def test_sharding_run_standalone(self, capsys):
        """Test sharding tool run_standalone."""
        tool = DatabaseShardingTool()
        result = tool.run_standalone([])
        assert result == 1
        captured = capsys.readouterr()
        assert "Usage" in captured.out

    def test_sharding_describe_usage(self):
        """Test sharding tool describe_usage."""
        tool = DatabaseShardingTool()
        usage = tool.describe_usage()
        assert "Sharding" in usage

    def test_sharding_api_methods(self):
        """Test sharding tool api_methods."""
        tool = DatabaseShardingTool()
        methods = tool.api_methods
        assert "create_shard" in methods
        assert "list_shards" in methods

    def test_sharding_run_standalone_create(self, tmp_path):
        """Test sharding tool run_standalone with create command."""
        config = {"db_path": str(tmp_path)}
        tool = DatabaseShardingTool(config=config)
        result = tool.run_standalone(["create", "test"])
        assert result == 0
        assert "test" in tool.list_shards()

    def test_sharding_run_standalone_list(self, tmp_path, capsys):
        """Test sharding tool run_standalone with list command."""
        config = {"db_path": str(tmp_path)}
        tool = DatabaseShardingTool(config=config)
        tool.create_shard("shard1")
        result = tool.run_standalone(["list"])
        assert result == 0
        captured = capsys.readouterr()
        assert "shard1" in captured.out

    def test_sharding_run_standalone_unknown(self, capsys):
        """Test sharding tool run_standalone with unknown command."""
        tool = DatabaseShardingTool()
        result = tool.run_standalone(["unknown"])
        assert result == 1
        captured = capsys.readouterr()
        assert "Unknown" in captured.out