"""Tests for tools module"""
import pytest
from luxx.tools.core import (
    ToolContext,
    ToolDefinition,
    ToolResult,
    ToolRegistry,
    CommandPermission
)


class TestToolContext:
    """Tests for ToolContext dataclass"""

    def test_tool_context_creation(self):
        """Should create context with default values"""
        ctx = ToolContext()
        assert ctx.workspace is None
        assert ctx.user_id is None
        assert ctx.username is None
        assert ctx.extra == {}

    def test_tool_context_with_values(self):
        """Should create context with provided values"""
        ctx = ToolContext(
            workspace="/workspace/test",
            user_id=1,
            username="testuser",
            extra={"key": "value"}
        )
        assert ctx.workspace == "/workspace/test"
        assert ctx.user_id == 1
        assert ctx.username == "testuser"
        assert ctx.extra["key"] == "value"


class TestToolDefinition:
    """Tests for ToolDefinition dataclass"""

    def test_tool_definition_creation(self):
        """Should create tool definition"""
        def handler(args):
            return {"result": "ok"}

        tool = ToolDefinition(
            name="test_tool",
            description="A test tool",
            parameters={"type": "object"},
            handler=handler
        )
        assert tool.name == "test_tool"
        assert tool.description == "A test tool"
        assert tool.category == "general"
        assert tool.required_permission == CommandPermission.READ_ONLY

    def test_tool_definition_to_openai_format(self):
        """Should convert to OpenAI format"""
        def handler(args):
            return {"result": "ok"}

        tool = ToolDefinition(
            name="test_tool",
            description="A test tool",
            parameters={"type": "object", "properties": {}},
            handler=handler
        )
        result = tool.to_openai_format()
        assert result["type"] == "function"
        assert result["function"]["name"] == "test_tool"


class TestToolResult:
    """Tests for ToolResult dataclass"""

    def test_tool_result_success(self):
        """Should create success result"""
        result = ToolResult(success=True, data={"key": "value"})
        assert result.success is True
        assert result.data["key"] == "value"
        assert result.error is None

    def test_tool_result_failure(self):
        """Should create failure result"""
        result = ToolResult(success=False, error="Something went wrong")
        assert result.success is False
        assert result.error == "Something went wrong"

    def test_tool_result_to_dict(self):
        """Should convert to dictionary"""
        result = ToolResult(success=True, data={"key": "value"})
        d = result.to_dict()
        assert isinstance(d, dict)
        assert d["success"] is True
        assert d["data"]["key"] == "value"

    def test_tool_result_ok_factory(self):
        """Should use ok() factory method"""
        result = ToolResult.ok({"result": "success"})
        assert result.success is True
        assert result.data == {"result": "success"}

    def test_tool_result_fail_factory(self):
        """Should use fail() factory method"""
        result = ToolResult.fail("Error occurred")
        assert result.success is False
        assert result.error == "Error occurred"


class TestToolRegistry:
    """Tests for ToolRegistry class"""

    def test_registry_singleton(self):
        """Should return same instance"""
        reg1 = ToolRegistry()
        reg2 = ToolRegistry()
        assert reg1 is reg2

    def test_register_tool(self):
        """Should register a tool"""
        registry = ToolRegistry()
        registry.clear()  # Start fresh

        def handler(args):
            return {"result": "ok"}

        tool = ToolDefinition(
            name="my_tool",
            description="My test tool",
            parameters={},
            handler=handler
        )
        registry.register(tool)
        assert registry.get("my_tool") is not None
        assert registry.tool_count() == 1

    def test_get_nonexistent_tool(self):
        """Should return None for nonexistent tool"""
        registry = ToolRegistry()
        registry.clear()
        assert registry.get("nonexistent") is None

    def test_list_all_tools(self):
        """Should list all registered tools"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return {}

        tool1 = ToolDefinition(name="tool1", description="Tool 1", parameters={}, handler=handler)
        tool2 = ToolDefinition(name="tool2", description="Tool 2", parameters={}, handler=handler)
        registry.register(tool1)
        registry.register(tool2)

        tools = registry.list_all()
        assert len(tools) == 2

    def test_list_by_category(self):
        """Should filter tools by category"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return {}

        tool1 = ToolDefinition(
            name="tool1", description="Tool 1", parameters={},
            handler=handler, category="code"
        )
        tool2 = ToolDefinition(
            name="tool2", description="Tool 2", parameters={},
            handler=handler, category="file"
        )
        registry.register(tool1)
        registry.register(tool2)

        code_tools = registry.list_by_category("code")
        assert len(code_tools) == 1

    def test_execute_tool(self):
        """Should execute a tool"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return {"executed": True, "args": args}

        tool = ToolDefinition(
            name="test_tool",
            description="Test tool",
            parameters={},
            handler=handler
        )
        registry.register(tool)

        result = registry.execute("test_tool", {"input": "value"})
        # Direct handler returns are passed through as-is
        assert result["executed"] is True
        assert result["args"]["input"] == "value"

    def test_execute_tool_with_tool_result(self):
        """Should return ToolResult when handler returns ToolResult"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return ToolResult.ok({"executed": True})

        tool = ToolDefinition(
            name="test_tool",
            description="Test tool",
            parameters={},
            handler=handler
        )
        registry.register(tool)

        result = registry.execute("test_tool", {})
        assert result["success"] is True
        assert result["data"]["executed"] is True

    def test_execute_nonexistent_tool(self):
        """Should return error for nonexistent tool"""
        registry = ToolRegistry()
        registry.clear()

        result = registry.execute("nonexistent", {})
        assert result["success"] is False
        assert "not found" in result["error"]

    def test_execute_with_context(self):
        """Should pass context to handler"""
        registry = ToolRegistry()
        registry.clear()
        received_context = None

        def handler(args, context=None):
            nonlocal received_context
            received_context = context
            return ToolResult.ok({"received": True})

        tool = ToolDefinition(
            name="test_tool",
            description="Test tool",
            parameters={},
            handler=handler
        )
        registry.register(tool)

        ctx = ToolContext(user_id=1, username="test")
        registry.execute("test_tool", {}, context=ctx)
        assert received_context is not None
        assert received_context.user_id == 1

    def test_permission_check(self):
        """Should check user permission"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return ToolResult.ok({"ok": True})

        tool = ToolDefinition(
            name="admin_tool",
            description="Admin tool",
            parameters={},
            handler=handler,
            required_permission=CommandPermission.ADMIN
        )
        registry.register(tool)

        # User with low permission
        ctx = ToolContext(
            user_id=1,
            extra={"user_permission_level": CommandPermission.READ_ONLY}
        )
        result = registry.execute("admin_tool", {}, context=ctx)
        assert result["success"] is False
        assert "Permission denied" in result["error"]

    def test_remove_tool(self):
        """Should remove a tool"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return {}

        tool = ToolDefinition(
            name="removable",
            description="To be removed",
            parameters={},
            handler=handler
        )
        registry.register(tool)
        assert registry.get("removable") is not None

        registry.remove("removable")
        assert registry.get("removable") is None

    def test_clear_tools(self):
        """Should clear all tools"""
        registry = ToolRegistry()
        registry.clear()

        def handler(args):
            return {}

        tool = ToolDefinition(name="tool1", description="", parameters={}, handler=handler)
        registry.register(tool)
        assert registry.tool_count() > 0

        registry.clear()
        assert registry.tool_count() == 0