"""
Tests for CLI command functionality.
Note: The CLI module doesn't exist in the current implementation,
but these tests demonstrate how it would be tested if implemented.
"""

import json
from unittest.mock import Mock, patch, MagicMock
from io import StringIO

import pytest


# Mock CLI module since it doesn't exist yet
class MockCLI:
    """Mock CLI for testing command patterns."""

    def __init__(self):
        self.commands = {}
        self.output = StringIO()

    def register_command(self, name, handler):
        """Register a command handler."""
        self.commands[name] = handler

    def execute(self, command_line):
        """Execute a command."""
        parts = command_line.split()
        if not parts:
            return None

        command = parts[0]
        args = parts[1:]

        if command in self.commands:
            return self.commands[command](*args)
        else:
            self.output.write(f"Unknown command: {command}\n")
            return None

    def write(self, text):
        """Write to output."""
        self.output.write(text)

    def get_output(self):
        """Get output contents."""
        return self.output.getvalue()


@pytest.mark.unit
class TestCLIEntityCommands:
    """Test entity management commands."""

    @pytest.fixture
    def cli(self):
        """Create mock CLI instance."""
        return MockCLI()

    def test_list_entities_command(self, cli):
        """Test listing entities."""
        def list_entities(entity_type=None):
            if entity_type:
                cli.write(f"Listing {entity_type} entities\n")
            else:
                cli.write("Listing all entities\n")
            return ["entity1", "entity2"]

        cli.register_command("list", list_entities)

        result = cli.execute("list homes")
        assert result == ["entity1", "entity2"]
        assert "Listing homes entities" in cli.get_output()

    def test_create_entity_command(self, cli):
        """Test creating an entity."""
        def create_entity(entity_type, name):
            cli.write(f"Creating {entity_type}: {name}\n")
            return {"id": "new-id", "type": entity_type, "name": name}

        cli.register_command("create", create_entity)

        result = cli.execute("create home TestHome")
        assert result["type"] == "home"
        assert result["name"] == "TestHome"
        assert "Creating home: TestHome" in cli.get_output()

    def test_update_entity_command(self, cli):
        """Test updating an entity."""
        def update_entity(entity_id, *updates):
            updates_str = " ".join(updates)
            cli.write(f"Updating {entity_id}: {updates_str}\n")
            return {"id": entity_id, "updated": True}

        cli.register_command("update", update_entity)

        result = cli.execute("update home-1 name=NewName")
        assert result["id"] == "home-1"
        assert result["updated"] is True

    def test_delete_entity_command(self, cli):
        """Test deleting an entity."""
        def delete_entity(entity_id):
            cli.write(f"Deleting {entity_id}\n")
            return {"deleted": entity_id}

        cli.register_command("delete", delete_entity)

        result = cli.execute("delete home-1")
        assert result["deleted"] == "home-1"
        assert "Deleting home-1" in cli.get_output()


@pytest.mark.unit
class TestCLISyncCommands:
    """Test sync-related commands."""

    @pytest.fixture
    def cli(self):
        """Create mock CLI instance."""
        return MockCLI()

    def test_sync_status_command(self, cli):
        """Test sync status command."""
        def sync_status():
            status = {
                "last_sync": "2024-01-01T12:00:00Z",
                "pending_changes": 5,
                "sync_enabled": True
            }
            cli.write(f"Sync Status: {json.dumps(status, indent=2)}\n")
            return status

        cli.register_command("sync-status", sync_status)

        result = cli.execute("sync-status")
        assert result["pending_changes"] == 5
        assert "Sync Status:" in cli.get_output()

    def test_sync_now_command(self, cli):
        """Test immediate sync command."""
        def sync_now(force=False):
            cli.write(f"Starting sync (force={force})...\n")
            return {
                "synced": 10,
                "conflicts": 0,
                "duration": "2.5s"
            }

        cli.register_command("sync", sync_now)

        result = cli.execute("sync")
        assert result["synced"] == 10
        assert "Starting sync" in cli.get_output()

    def test_resolve_conflicts_command(self, cli):
        """Test conflict resolution command."""
        def resolve_conflicts(strategy="last_write_wins"):
            cli.write(f"Resolving conflicts with strategy: {strategy}\n")
            return {
                "resolved": 3,
                "strategy": strategy
            }

        cli.register_command("resolve-conflicts", resolve_conflicts)

        result = cli.execute("resolve-conflicts merge")
        assert result["resolved"] == 3
        assert result["strategy"] == "merge"


@pytest.mark.unit
class TestCLIGraphCommands:
    """Test graph operation commands."""

    @pytest.fixture
    def cli(self):
        """Create mock CLI instance."""
        return MockCLI()

    def test_graph_traverse_command(self, cli):
        """Test graph traversal command."""
        def traverse(start_node, depth="3"):
            cli.write(f"Traversing from {start_node} (depth={depth})\n")
            return {
                "nodes_visited": 15,
                "max_depth_reached": int(depth)
            }

        cli.register_command("traverse", traverse)

        result = cli.execute("traverse home-1 5")
        assert result["nodes_visited"] == 15
        assert result["max_depth_reached"] == 5

    def test_find_path_command(self, cli):
        """Test path finding command."""
        def find_path(from_node, to_node):
            cli.write(f"Finding path from {from_node} to {to_node}\n")
            return {
                "path": [from_node, "intermediate", to_node],
                "distance": 2
            }

        cli.register_command("path", find_path)

        result = cli.execute("path room-1 room-5")
        assert len(result["path"]) == 3
        assert result["distance"] == 2

    def test_graph_stats_command(self, cli):
        """Test graph statistics command."""
        def graph_stats():
            stats = {
                "total_nodes": 150,
                "total_edges": 280,
                "connected_components": 3,
                "average_degree": 3.7
            }
            cli.write(f"Graph Statistics:\n{json.dumps(stats, indent=2)}\n")
            return stats

        cli.register_command("graph-stats", graph_stats)

        result = cli.execute("graph-stats")
        assert result["total_nodes"] == 150
        assert result["total_edges"] == 280


@pytest.mark.unit
class TestCLIConfigCommands:
    """Test configuration commands."""

    @pytest.fixture
    def cli(self):
        """Create mock CLI instance."""
        return MockCLI()

    def test_config_get_command(self, cli):
        """Test getting configuration value."""
        def config_get(key):
            config = {
                "sync.enabled": "true",
                "sync.interval": "300",
                "api.url": "http://localhost:8000"
            }
            value = config.get(key, "Not found")
            cli.write(f"{key} = {value}\n")
            return value

        cli.register_command("config-get", config_get)

        result = cli.execute("config-get sync.enabled")
        assert result == "true"

    def test_config_set_command(self, cli):
        """Test setting configuration value."""
        def config_set(key, value):
            cli.write(f"Setting {key} = {value}\n")
            return {"key": key, "value": value, "saved": True}

        cli.register_command("config-set", config_set)

        result = cli.execute("config-set sync.interval 600")
        assert result["key"] == "sync.interval"
        assert result["value"] == "600"
        assert result["saved"] is True

    def test_config_list_command(self, cli):
        """Test listing all configuration."""
        def config_list():
            config = {
                "sync.enabled": "true",
                "sync.interval": "300",
                "api.url": "http://localhost:8000",
                "log.level": "info"
            }
            cli.write("Configuration:\n")
            for key, value in config.items():
                cli.write(f"  {key} = {value}\n")
            return config

        cli.register_command("config-list", config_list)

        result = cli.execute("config-list")
        assert "sync.enabled" in result
        assert "Configuration:" in cli.get_output()


@pytest.mark.unit
class TestCLIBatchCommands:
    """Test batch operation commands."""

    @pytest.fixture
    def cli(self):
        """Create mock CLI instance."""
        return MockCLI()

    def test_batch_import_command(self, cli):
        """Test batch import command."""
        def batch_import(file_path):
            cli.write(f"Importing from {file_path}...\n")
            return {
                "imported": 50,
                "failed": 2,
                "duration": "5.2s"
            }

        cli.register_command("import", batch_import)

        result = cli.execute("import data.json")
        assert result["imported"] == 50
        assert result["failed"] == 2

    def test_batch_export_command(self, cli):
        """Test batch export command."""
        def batch_export(file_path, entity_type="all"):
            cli.write(f"Exporting {entity_type} to {file_path}...\n")
            return {
                "exported": 75,
                "file": file_path,
                "size": "125KB"
            }

        cli.register_command("export", batch_export)

        result = cli.execute("export backup.json homes")
        assert result["exported"] == 75
        assert result["file"] == "backup.json"


@pytest.mark.unit
class TestCLIInteractiveMode:
    """Test interactive CLI mode."""

    def test_interactive_prompt(self):
        """Test interactive command prompt."""
        cli = MockCLI()

        # Simulate interactive session
        commands = [
            "list homes",
            "create room Kitchen",
            "sync",
            "exit"
        ]

        results = []
        for cmd in commands:
            if cmd == "exit":
                break
            # Mock command execution
            cli.write(f"> {cmd}\n")
            results.append(cmd)

        assert len(results) == 3
        assert "list homes" in results
        assert "create room Kitchen" in results

    def test_command_history(self):
        """Test command history tracking."""
        history = []

        def add_to_history(command):
            history.append(command)
            return len(history)

        # Simulate commands
        commands = ["list", "create home Test", "sync", "list"]

        for cmd in commands:
            add_to_history(cmd)

        assert len(history) == 4
        assert history[0] == "list"
        assert history[-1] == "list"

    def test_command_completion(self):
        """Test command auto-completion."""
        available_commands = [
            "list", "create", "update", "delete",
            "sync", "sync-status", "config-get", "config-set"
        ]

        def get_completions(prefix):
            return [cmd for cmd in available_commands if cmd.startswith(prefix)]

        # Test completions
        assert "sync" in get_completions("sy")
        assert "sync-status" in get_completions("sync-")
        assert len(get_completions("config-")) == 2

        # Test no matches
        assert len(get_completions("xyz")) == 0
