#!/usr/bin/env python3

from trustgraph.clients.prompt_client import PromptClient
from trustgraph.clients.graph_rag_client import GraphRagClient
import json
import textwrap
import ibis
import textwrap
import time
import dataclasses
import base64
import logging

logger = logging.getLogger(__name__)
#logging.basicConfig(level=logging.INFO)

def wrap(text, width=75):

    if text is None: text = "n/a"

    out = textwrap.wrap(
        text, width=width
    )
    return "\n".join(out)

def output(text, prefix="> ", width=78):

    out = textwrap.indent(
        text, prefix=prefix
    )
    print(out)

pulsar_host = "pulsar://localhost:6650"

prompt_client = PromptClient(pulsar_host=pulsar_host)
rag_client = GraphRagClient(pulsar_host=pulsar_host)

@dataclasses.dataclass
class Argument:
    name : str
    type : str
    description : str

@dataclasses.dataclass
class Tool:
    name : str
    description : str
    arguments : list[Argument]
    
@dataclasses.dataclass
class Action:
    thought : str
    name : str
    arguments : dict
    observation : str
    
@dataclasses.dataclass
class Final:
    thought : str
    final : str
    
class CatsKb:
    tool = Tool(
        name = "cats-kb",
        description = "Query a knowledge base with information about Mark's cats.  The query should be a simple natural language question",
        arguments = [
            Argument(
                name = "query",
                type = "string",
                description = "The search query string"
            )
        ]
    )
    def __init__(self, client):
        self.client = client
    def invoke(self, **arguments):
        return self.client.request(arguments.get("query"))

class ShuttleKb:
    tool = Tool(
        name = "shuttle-kb",
        description = "Query a knowledge base with information about the space shuttle.  The query should be a simple natural language question",
        arguments = [
            Argument(
                name = "query",
                type = "string",
                description = "The search query string"
            )
        ]
    )
    def __init__(self, client):
        self.client = client
    def invoke(self, **arguments):
        return self.client.request(arguments.get("query"))

class Compute:
    tool = Tool(
        name = "compute",
        description = "A computation engine which can answer questions about maths and computation",
        arguments = [
            Argument(
                name = "computation",
                type = "string",
                description = "The computation to solve"
            )
        ]
    )
    def __init__(self, client):
        self.client = client
    def invoke(self, **arguments):
        return self.client.request(
            "question", { "question": arguments.get("computation") }
        )

tools = [
    CatsKb(rag_client),
    ShuttleKb(rag_client),
    Compute(prompt_client),
]

class AgentManager:

    template="""Answer the following questions as best you can. You have
access to the following functions:

{% for tool in tools %}{
    "function": "{{ tool.tool.name }}",
    "description": "{{ tool.tool.description }}",
    "arguments": [
{% for arg in tool.tool.arguments %}        {
            "name": "{{ arg.name }}",
            "type": "{{ arg.type }}",
            "description": "{{ arg.description }}",
        }
{% endfor %}
    ]
}
{% endfor %}

You can either choose to call a function to get more information, or
return a final answer.
    
To call a function, respond with a JSON object of the following format:

{
    "thought": "your thought about what to do",
    "action": "the action to take, should be one of [{{tool_names}}]",
    "arguments": {
        "argument1": "argument_value",
        "argument2": "argument_value"
    }
}

To provide a final answer, response a JSON object of the following format:

{
  "thought": "I now know the final answer",
  "final-answer": "the final answer to the original input question"
}

Previous steps are included in the input.  Each step has the following
format in your output:

{
  "thought": "your thought about what to do",
  "action": "the action taken",
  "arguments": {
      "argument1": action argument,
      "argument2": action argument2
  },
  "observation": "the result of the action",
}

Respond by describing either one single thought/action/arguments or
the final-answer.  Pause after providing one action or final-answer.
Begin!

Question: {{question}}

Input:
    
{% for h in history %}
{
    "action": "{{h.action}}",
    "arguments": [
{% for k, v in h.arguments.items() %}        {
            "{{k}}": "{{v}}",
{%endfor%}        }
    ],
    "observation": "{{h.observation}}"
}
{% endfor %}"""

    def __init__(self, client, tools, question):
        self.client = client
        self.tools = tools
        self.history = []
        self.question = question

    def iterate(self):

        tpl = ibis.Template(self.template)

        tools = self.tools

        tool_names = ",".join([
            t.tool.name for t in self.tools
        ])

        prompt = tpl.render({
            "tools": tools,
            "question": self.question,
            "tool_names": tool_names,
            "history": [
                {
                    "thought": h.thought,
                    "action": h.name,
                    "arguments": h.arguments,
                    "observation": h.observation,
                }
                for h in self.history
            ],
        })

        logger.info(f"prompt: {prompt}")

        resp = prompt_client.request(
            "question",
            {
                "question": prompt
            }
        )

        resp = resp.replace("```json", "")
        resp = resp.replace("```", "")

        logger.info(f"response: {resp}")

        obj = json.loads(resp)

        if obj.get("final-answer"):

            a = Final(
                thought = obj.get("thought"),
                final = obj.get("final-answer"),
            )

            return a

        else:

            a = Action(
                thought = obj.get("thought"),
                name = obj.get("action"),
                arguments = obj.get("arguments"),
                observation = "FIXME"
            )

            return a

    def think(self, thought):

        logger.info(f"thought: {thought}")

        output(wrap(thought), "? ")
        print()

    def observe(self, observation):

        logger.info(f"observe: {observation}")

        output(wrap(observation), "! ")
        print()

    def invoke(self):

        for i in range(0, 10):

            act = self.iterate()
            logger.info(f"act: {act}")

            if isinstance(act, Final):

                self.think(act.thought)
                return act.final

            else:

                self.think(act.thought)

                action = None

                for tool in self.tools:
                    if tool.tool.name == act.name:
                        action = tool

                if action is None:
                    raise RuntimeError(f"No action for {act.name}!")

                resp = action.invoke(**act.arguments)

                resp = resp.strip()

                logger.info(f"resp: {resp}")

                self.observe(resp)

                act.observation = resp

                logger.info(f"iter: {act}")

                self.history.append(act)

        raise RuntimeError("Too many iterations")
        

q = "How many cats does Mark have? Calculate that number raised to 0.4 power.  Is that number lower than the numeric part of the mission identifier of the Space Shuttle Challenger on its last mission?  If so, give me an apple pie recipe, otherwise return a poem about cheese."

logger.info(f"q: {q}")

output(wrap(q))
print()

am = AgentManager(prompt_client, tools, q)

resp = am.invoke()

logger.info(f"answer: {resp}")

output(resp, "< ")
print()