#!/usr/bin/env python3

# MIT License
# Copyright (c) 2023-2024 wunderwuzzi23
# Greetings from Seattle! 

import os
import platform
from ai_model import AIModel, GroqModel, OpenAIModel, OllamaModel, AnthropicModel, AzureOpenAIModel
import sys
import subprocess
import dotenv 
import distro
import yaml
import pyperclip
from termcolor import colored
from colorama import init

def read_config():
  ## Find the executing directory (e.g. in case an alias is set)
  ## So we can find the config file
  yolo_path = os.path.abspath(__file__)
  prompt_path = os.path.dirname(yolo_path)

  config_file = os.path.join(prompt_path, "yolo.yaml")
  with open(config_file, 'r') as file:
    return yaml.safe_load(file)

def get_system_prompt(shell):
  ## Find the executing directory (e.g. in case an alias is set)
  ## So we can find the prompt.txt file
  yolo_path = os.path.abspath(__file__)
  prompt_path = os.path.dirname(yolo_path)

  ## Load the prompt and prep it
  prompt_file = os.path.join(prompt_path, "prompt.txt")
  system_prompt = open(prompt_file,"r").read()
  system_prompt = system_prompt.replace("{shell}", shell)
  system_prompt = system_prompt.replace("{os}", get_os_friendly_name())

  return system_prompt

def ensure_prompt_is_question(prompt):
  if prompt[-1:] != "?" and prompt[-1:] != ".":
    prompt+="?"
  return prompt

def print_usage(config):
  print("Yolo v0.5 - by @wunderwuzzi23 (June 29, 2024)")
  print()
  print("Usage: yolo [-a] list the current directory information")
  print("Argument: -a: Prompt the user before running the command (only useful when safety is off)")
  print()

  print("Current configuration per yolo.yaml:")
  print("* API          : " + str(config["api"]))
  print("* Model        : " + str(config["model"]))
  print("* Temperature  : " + str(config["temperature"]))
  print("* Max. Tokens  : " + str(config["max_tokens"]))
  print("* Safety       : " + str(bool(config["safety"])))
  print("* Command Color: " + str(config["suggested_command_color"]))

def get_os_friendly_name():
  os_name = platform.system()

  if os_name == "Linux":
    return "Linux/"+distro.name(pretty=True)
  elif os_name == "Windows":
    return os_name
  elif os_name == "Darwin":
    return "Darwin/macOS"
  else:
    return os_name

def chat_completion(client, query, config, shell):
  if query == "":
      print ("No user prompt specified.")
      sys.exit(-1)
 
  system_prompt = get_system_prompt(shell)

  response = client.chat(
    model=config["model"],
    messages=[
        {"role": "system", "content": system_prompt},
        {"role": "user", "content": query}
    ],
    temperature=config["temperature"],
    max_tokens=config["max_tokens"])
 
  return response

def check_for_issue(response):
  prefixes = ("sorry", "i'm sorry", "the question is not clear", "i'm", "i am")
  if response.lower().startswith(prefixes):
    print(colored("There was an issue: "+response, 'red'))
    sys.exit(-1)

def check_for_markdown(response):
  if response.count("```",2):
    print(colored("The proposed command contains markdown, so I did not execute the response directly: \n", 'red')+response)
    sys.exit(-1)

def missing_posix_display():
  return 'DISPLAY' not in os.environ or not os.environ["DISPLAY"]

def prompt_user_for_action(config, ask_flag, response):
  print("Command: " + colored(response, config["suggested_command_color"], attrs=['bold']))
  
  modify_snippet = ""
  if bool(config["modify"]) == True:
    modify_snippet = " [m]odify"
    
  copy_to_clipboard_snippet = " [c]opy to clipboard"
  if os.name == "posix" and missing_posix_display():
    if get_os_friendly_name() != "Darwin/macOS":
      copy_to_clipboard_snippet = ""

  if bool(config["safety"]) == True or ask_flag == True:
    prompt_text = f"Execute command? [Y]es [n]o{modify_snippet}{copy_to_clipboard_snippet} ==> "
    print(prompt_text, end = '')
    user_input = input()
    return user_input 
  
  if bool(config["safety"]) == False:
     return "Y"

def eval_user_intent_and_execute(client, config, user_input, command, shell, ask_flag):
  if user_input.upper() not in ["", "Y", "C", "M"]:
    print("No action taken.")
    return
  
  if user_input.upper() == "Y" or user_input == "":
    if shell == "powershell.exe":
      subprocess.run([shell, "/c", command], shell=False)  
    else: 
      # Unix: /bin/bash /bin/zsh: uses -c both Ubuntu and macOS should work, others might not
      subprocess.run([shell, "-c", command], shell=False)
  
  if bool(config["modify"]) and user_input.upper() == "M":
    print("Modify prompt: ", end = '')
    modded_query = input()
    modded_response = chat_completion(client, modded_query, config, shell)
    check_for_issue(modded_response)
    check_for_markdown(modded_response)
    user_intent = prompt_user_for_action(config, ask_flag, modded_response)
    print()
    eval_user_intent_and_execute(client, config, user_intent, modded_response, shell, ask_flag)
  
  if user_input.upper() == "C":
      if os.name == "posix" and missing_posix_display():
        if get_os_friendly_name() != "Darwin/macOS":
          return
      pyperclip.copy(command) 
      print("Copied command to clipboard.")

def main():
  init()  #Enable color output on Windows using colorama
  dotenv.load_dotenv()

  config = read_config()
  client = AIModel.get_model_client(config)

  # Unix based SHELL (/bin/bash, /bin/zsh), otherwise assuming it's Windows
  shell = os.environ.get("SHELL", "powershell.exe") 

  command_start_idx  = 1     # Question starts at which argv index?
  ask_flag = False           # safety switch -a command line argument
  yolo = ""                  # user's answer to safety switch (-a) question y/n

  # Parse arguments and make sure we have at least a single word
  if len(sys.argv) < 2:
    print_usage(config)
    sys.exit(-1)

  # Safety switch via argument -a (local override of global setting)
  # Force Y/n questions before running the command
  if sys.argv[1] == "-a":
    ask_flag = True
    command_start_idx = 2

  # To allow easy/natural use we don't require the input to be a single string.
  # User can just type yolo what is my name? without having to put the question between ''
  arguments = sys.argv[command_start_idx:]
  user_prompt = " ".join(arguments)

  ## core prompting loop logic
  result = chat_completion(client, user_prompt, config, shell) 
  check_for_issue(result)
  check_for_markdown(result)

  users_intent = prompt_user_for_action(config, ask_flag, result)
  print()
  eval_user_intent_and_execute(client, config, users_intent, result, shell, ask_flag)

if __name__ == "__main__":
  main()