from models.tool_definitions import AgentGoal
from typing import Optional
import json

MULTI_GOAL_MODE:bool = None

def generate_genai_prompt(
    agent_goal: AgentGoal, conversation_history: str, multi_goal_mode:bool, raw_json: Optional[str] = None
) -> str:
    """
    Generates a concise prompt for producing or validating JSON instructions
    with the provided tools and conversation history.
    """
    prompt_lines = []
    set_multi_goal_mode_if_unset(multi_goal_mode)

    # Intro / Role
    prompt_lines.append(
        "You are an AI agent that helps fill required arguments for the tools described below. "
        "You must respond with valid JSON ONLY, using the schema provided in the instructions."
    )

    # Main Conversation History
    prompt_lines.append("=== Conversation History ===")
    prompt_lines.append(
        "This is the ongoing history to determine which tool and arguments to gather:"
    )
    prompt_lines.append("BEGIN CONVERSATION HISTORY")
    prompt_lines.append(json.dumps(conversation_history, indent=2))
    prompt_lines.append("END CONVERSATION HISTORY")
    prompt_lines.append("")

    # Example Conversation History (from agent_goal)
    if agent_goal.example_conversation_history:
        prompt_lines.append("=== Example Conversation With These Tools ===")
        prompt_lines.append(
            "Use this example to understand how tools are invoked and arguments are gathered."
        )
        prompt_lines.append("BEGIN EXAMPLE")
        prompt_lines.append(agent_goal.example_conversation_history)
        prompt_lines.append("END EXAMPLE")
        prompt_lines.append("")

    # Tools Definitions
    prompt_lines.append("=== Tools Definitions ===")
    prompt_lines.append(f"There are {len(agent_goal.tools)} available tools:")
    prompt_lines.append(", ".join([t.name for t in agent_goal.tools]))
    prompt_lines.append(f"Goal: {agent_goal.description}")
    prompt_lines.append(
        "Gather the necessary information for each tool in the sequence described above."
    )
    prompt_lines.append(
        "Only ask for arguments listed below. Do not add extra arguments."
    )
    prompt_lines.append("")
    for tool in agent_goal.tools:
        prompt_lines.append(f"Tool name: {tool.name}")
        prompt_lines.append(f"  Description: {tool.description}")
        prompt_lines.append("  Required args:")
        for arg in tool.arguments:
            prompt_lines.append(f"    - {arg.name} ({arg.type}): {arg.description}")
        prompt_lines.append("")
    prompt_lines.append(
        "When all required args for a tool are known, you can propose next='confirm' to run it."
    )

    # JSON Format Instructions
    prompt_lines.append("=== Instructions for JSON Generation ===")
    prompt_lines.append(
        "Your JSON format must be:\n"
        "{\n"
        '  "response": "<plain text>",\n'
        '  "next": "<question|confirm|pick-new-goal|done>",\n'
        '  "tool": "<tool_name or null>",\n'
        '  "args": {\n'
        '    "<arg1>": "<value1 or null>",\n'
        '    "<arg2>": "<value2 or null>",\n'
        "    ...\n"
        "  }\n"
        "}"
    )
    prompt_lines.append(
        "1) If any required argument is missing, set next='question' and ask the user.\n"
        "2) If all required arguments are known, set next='confirm' and specify the tool.\n"
        "   The user will confirm before the tool is run.\n"
        f"3) {generate_toolchain_complete_guidance()}\n"
        "4) response should be short and user-friendly.\n"
    )

    # Validation Task (If raw_json is provided)
    if raw_json is not None:
        prompt_lines.append("")
        prompt_lines.append("=== Validation Task ===")
        prompt_lines.append("Validate and correct the following JSON if needed:")
        prompt_lines.append(json.dumps(raw_json, indent=2))
        prompt_lines.append("")
        prompt_lines.append(
            "Check syntax, 'tool' validity, 'args' completeness, "
            "and set 'next' appropriately. Return ONLY corrected JSON."
        )

    # Prompt Start
    prompt_lines.append("")
    if raw_json is not None:
        prompt_lines.append("Begin by validating the provided JSON if necessary.")
    else:
        prompt_lines.append(
            "Begin by producing a valid JSON response for the next tool or question."
        )

    return "\n".join(prompt_lines)

def generate_tool_completion_prompt(current_tool: str, dynamic_result: dict) -> str:
    """
    Generates a prompt for handling tool completion and determining next steps.
    
    Args:
        current_tool: The name of the tool that just completed
        dynamic_result: The result data from the tool execution
        
    Returns:
        str: A formatted prompt string for the agent to process the tool completion
    """
    return (
        f"### The '{current_tool}' tool completed successfully with {dynamic_result}. "
        "INSTRUCTIONS: Parse this tool result as plain text, and use the system prompt containing the list of tools in sequence and the conversation history (and previous tool_results) to figure out next steps, if any. "
        "You will need to use the tool_results to auto-fill arguments for subsequent tools and also to figure out if all tools have been run. "
        '{"next": "<question|confirm|pick-new-goal|done>", "tool": "<tool_name or null>", "args": {"<arg1>": "<value1 or null>", "<arg2>": "<value2 or null>}, "response": "<plain text (can include \\n line breaks)>"}'
        "ONLY return those json keys (next, tool, args, response), nothing else. "
        'Next should be "question" if the tool is not the last one in the sequence. '
        'Next should be "done" if the user is asking to be done with the chat. '
        f"{generate_pick_new_goal_guidance()}"
    )

def generate_missing_args_prompt(current_tool: str, tool_data: dict, missing_args: list[str]) -> str:
    """
    Generates a prompt for handling missing arguments for a tool.
    
    Args:
        current_tool: The name of the tool that needs arguments
        tool_data: The current tool data containing the response
        missing_args: List of argument names that are missing
        
    Returns:
        str: A formatted prompt string for requesting missing arguments
    """
    return (
        f"### INSTRUCTIONS set next='question', combine this response response='{tool_data.get('response')}' "
        f"and following missing arguments for tool {current_tool}: {missing_args}. "
        "Only provide a valid JSON response without any comments or metadata."
    )

def set_multi_goal_mode_if_unset(mode:bool)->None:
    """
    Set multi-mode (used to pass workflow)
    
    Args:
        None
        
    Returns:
        bool: True if in multi-goal mode, false if not
    """
    global MULTI_GOAL_MODE
    if MULTI_GOAL_MODE is None:
        MULTI_GOAL_MODE = mode

def is_multi_goal_mode()-> bool:
    """
    Centralized logic for if we're in multi-goal mode.
    
    Args:
        None
        
    Returns:
        bool: True if in multi-goal mode, false if not
    """
    return MULTI_GOAL_MODE

def generate_pick_new_goal_guidance()-> str:
    """
    Generates a prompt for guiding the LLM to pick a new goal or be done depending on multi-goal mode.
    
    Args:
        None
        
    Returns:
        str: A prompt string prompting the LLM to when to go to pick-new-goal
    """
    if is_multi_goal_mode(): 
        return 'Next should only be "pick-new-goal" if all tools have been run for the current goal (use the system prompt to figure that out) and the last successful tool was not ListAgents, or the user explicitly requested to pick a new goal.'
    else: 
        return 'Next should never be "pick-new-goal".'

def generate_toolchain_complete_guidance() -> str:
    """
    Generates a prompt for guiding the LLM to handle the end of the toolchain.
    
    Args:
        None
        
    Returns:
        str: A prompt string prompting the LLM to prompt for a new goal, or be done
    """
    if is_multi_goal_mode(): 
        return "If no more tools are needed (user_confirmed_tool_run has been run for all), set next='confirm' and tool='ListAgents'."
    else :
        return "If no more tools are needed (user_confirmed_tool_run has been run for all), set next='done' and tool=''."