#!/bin/python3
import os
from pathlib import Path
from openai import OpenAI
from typing import Optional
import argparse
import subprocess
import readline
import json

import logging
logger = logging.getLogger(__name__)
logging.basicConfig(filename="thoughts.log",
                    level=logging.INFO)

client = OpenAI(api_key = os.environ["AALTO_LLM_KEY"],
                base_url = "https://llm-gateway.k8s.aalto.fi/api/v1")

def direct_query(query: str):
    logger.info(f"send: {query}")
    res = client.responses.create(model = "RedHatAI/gemma-4-31B-it-FP8-Dynamic",
                                  input = query)
    logger.info(f"receive: {res.output_text}")
    return res.output_text

# def reason_query(input):
#     # TODO some models may natively support reasoning
    
#     reasoning = direct_query(input + ({"role": "system",
#                                        "content": "Reason about the user's query step by step.\n\nAn answer will be generated based on your analysis."},))

#     summary = direct_query(input + ({"role": "assistant", "content": reasoning},
#                                     {"role": "system",
#                                      "content": "Formulate your previous reasoning as a concise answer to the user."}))

#     return summary

# # kinda funky
# # def flexible_query(input):
   
# #     reasoning_required = direct_query(input[-1:] + ({"role": "system", "content": "Does answering the user's question require reasoning? (y|N)"},))
# #     if reasoning_required == 'y':
# #         return reason_query(input)
# #     else:
# #         return direct_query(input)

    
def chat(content, state = (), query_method = direct_query, role = "user"):
    
    state = state + ({"role": role, "content": content},)
    
    response = query_method(state)

    state = state + ({"role": "assistant", "content": response},)
    
    return (response, state)

def strip_enclosing(s: str, start="```json", end="```") -> str:
    s = s.strip()
    return s[len(start):-len(end)] if s[:len(start)] == start and s[-len(end):] == end else s


def path_checked(path: Path, cwd = Path.cwd()) -> Optional[Path]:
    """Resolves `path`, returning `None` if it's not a subdirectory of `cwd`."""
    path = path.resolve()
    cwd = cwd.resolve()
    return path if path.is_relative_to(cwd) else None


def inner_query_agent(actions: list, query: str, state = ()):

    state = state + ({"role": "user", "content": query},)

    (res, state) = chat(f"Based on the current state, what should you do next?\n"
                        "Respond JSON indicating an action, or respond in natural language if you are finished.",
                        state)

    try:
        action = json.loads(strip_enclosing(res))
    except json.JSONDecodeError:
        return (res, state)

    for f in actions:
        result_json = f(action)
        if result_json is not None:
            (res, state) = inner_query_agent(actions, json.dumps(result_json), state)
            return (res, state)

    logger.info(f"valid json '{res}' but no actions matched")

    return (res, state)


def query_agent(query: str, state = ()):

    def path_helper(path_str: str, callback):
        path =  path_checked(Path(path_str))
        if path is None:
            return {"status": "error", "reason": f"Permission denied: {path_str}"}
        else:
            try:
                return {"status": "success", **callback(path)}
            except Exception as e:
                return {"status": "error", "reason": f"Failure: {e}"}

    def ls(args):
        '{"action": "ls", "path": PATH} - list files at PATH'
        def inner(path: Path):
            return {"content":  list(map(lambda s: str(s), path.iterdir()))}
        match args:
            case {"action": "ls", "path": path_str}:
                return path_helper(path_str, inner)

    def read(args):
        '{"action": "read", "path": PATH} - read file at PATH'
        def inner(path: Path):
            contents = path.read_text(encoding="utf-8")
            return {"content": contents}
        match args:
            case {"action": "read", "path": path_str}:
                return path_helper(path_str, inner)

    def write(args):
        '{"action": "write", "path": PATH, "content": CONTENT} - write CONTENT into file at PATH'
        def inner(path: Path, text: str):
            n_bytes = path.write_text(text)
            return {"bytes": n_bytes}
        match args:
            case {"action": "write", "path": path_str, "content": content}:
                return path_helper(path_str, lambda path: inner(path, content))

    
    def tldr(args):
        '{"action": "tldr", "program": PROGRAM} - read tldr docs for PROGRAM'
        match args:
            case {"action": "tldr", "program": program_str}:
                try:
                    # Run man command and capture output
                    # -P cat is used to avoid paging and just print the text
                    result = subprocess.run(
                        ["tldr", program_str],
                        capture_output=True,
                        text=True,
                        check=True
                    )
                    return {"status": "success", "content": result.stdout}
                except subprocess.CalledProcessError:
                    return {"status": "error", "reason": f"Tldr for '{program_str}' not found."}
                except Exception as e:
                    return {"status": "error", "reason": f"An unexpected error occurred: {e}"}

    actions = [ls, read, write, tldr]

    state = state + ({"role": "system",
                      "content": f"""You are an autonomous coding agent that can help with programming tasks.
You can explore repositories, read files, search for information, and make changes to code.

You have access to the following actions.
{'\n'.join(map(lambda f: '* ' + f.__doc__, actions))}
* RESPONSE - send non-json text RESPONSE to the user once the task is complete
"""},)

    state = state + ({"role": "system", "content": "Analyze the following user-given task and break it down into steps."},)

    return inner_query_agent(actions, query, state)
    

def main():

    state = ()

    while True:
        
        query = input("> ").strip()

        (response, state) = query_agent(query, state)
        
        print(response)
        

if __name__ == "__main__":
    main()