"""
Tool definition converter for Function Calling.
Converts ToolRegistry definitions to LLM ToolDefinition format.
"""

import logging
from typing import Any

from app.services.llm.base import ToolDefinition
from app.services.mid.tool_registry import ToolDefinition as RegistryToolDefinition

logger = logging.getLogger(__name__)


def convert_tool_to_llm_format(tool: RegistryToolDefinition) -> ToolDefinition:
    """
    Convert ToolRegistry tool definition to LLM ToolDefinition format.
    
    Args:
        tool: Tool definition from ToolRegistry
        
    Returns:
        ToolDefinition for Function Calling
    """
    meta = tool.metadata or {}
    parameters = meta.get("parameters", {
        "type": "object",
        "properties": {},
        "required": [],
    })
    
    if not isinstance(parameters, dict):
        parameters = {
            "type": "object",
            "properties": {},
            "required": [],
        }
    
    if "type" not in parameters:
        parameters["type"] = "object"
    if "properties" not in parameters:
        parameters["properties"] = {}
    if "required" not in parameters:
        parameters["required"] = []
    
    properties = parameters.get("properties", {})
    if "tenant_id" in properties:
        properties = {k: v for k, v in properties.items() if k != "tenant_id"}
    if "user_id" in properties:
        properties = {k: v for k, v in properties.items() if k != "user_id"}
    if "session_id" in properties:
        properties = {k: v for k, v in properties.items() if k != "session_id"}
    
    parameters["properties"] = properties
    
    required = parameters.get("required", [])
    required = [r for r in required if r not in ("tenant_id", "user_id", "session_id")]
    parameters["required"] = required
    
    return ToolDefinition(
        name=tool.name,
        description=tool.description,
        parameters=parameters,
    )


def convert_tools_to_llm_format(tools: list[RegistryToolDefinition]) -> list[ToolDefinition]:
    """
    Convert multiple tool definitions to LLM format.
    
    Args:
        tools: List of tool definitions from ToolRegistry
        
    Returns:
        List of ToolDefinition for Function Calling
    """
    return [convert_tool_to_llm_format(tool) for tool in tools]


def build_tool_result_message(
    tool_call_id: str,
    tool_name: str,
    result: dict[str, Any],
    tool_guide: str | None = None,
) -> dict[str, str]:
    """
    Build a tool result message for the conversation.
    
    Args:
        tool_call_id: ID of the tool call
        tool_name: Name of the tool
        result: Tool execution result
        tool_guide: Optional tool usage guide to append
        
    Returns:
        Message dict with role='tool'
    """
    if isinstance(result, dict):
        result_copy = {k: v for k, v in result.items() if k != "_tool_guide"}
        content = str(result_copy)
    else:
        content = str(result)
    
    if tool_guide:
        content = f"{content}\n\n---\n{tool_guide}"
    
    return {
        "role": "tool",
        "tool_call_id": tool_call_id,
        "content": content,
    }