#!/usr/bin/env python3.12
# pylint: disable=bare-except, broad-exception-caught, invalid-name

import logging
import traceback
import regex
import json

from aiohttp import ClientSession, ClientTimeout
from fastapi import FastAPI, Request, HTTPException, BackgroundTasks
from pydantic import BaseModel


class ValidAISongRequest(BaseModel):
    """
    - **a**: artist
    - **s**: track title
    """
    
    a: str
    s: str
    
class ValidHookSongRequest(BaseModel):
    """
    - **a**: artist
    - **s**: track title
    - **hook**: hook to return
    """

    a: str
    s: str
    hook: str | None = ""    

# pylint: enable=bad-indentation

class AI(FastAPI):
    """AI Endpoints"""
    def __init__(self, app: FastAPI, my_util, constants, glob_state):  # pylint: disable=super-init-not-called
        self.app = app
        self.util = my_util
        self.constants = constants
        self.glob_state = glob_state
        self.url_clean_regex = regex.compile(r'^\/ai\/(openai|base)\/')
        self.endpoints = {
            "ai/openai": self.ai_openai_handler,
            "ai/base": self.ai_handler,
            "ai/song": self.ai_song_handler,
            "ai/hook": self.ai_hook_handler,
            #tbd
        }
        
        for endpoint, handler in self.endpoints.items():
            app.add_api_route(f"/{endpoint}/", handler, methods=["POST"] if not endpoint == "testy" else ["POST", "GET"])
            
    
    async def respond_via_webhook(self, data: ValidHookSongRequest, originalRequest: Request):
        """Respond via Webhook"""
        try:
            logging.debug("Request received: %s", data)
            data2 = data.copy()
            del data2.hook
            response = await self.ai_song_handler(data2, originalRequest)
            if not response.get('resp'):
                logging.critical("NO RESP!")
                return            
            response = response.get('resp')
            hook_data = {
                'username': 'Claude',
                "embeds": [{
                    "title": "Claude's Feedback",
                    "description": response,
                    "footer": {
                        "text": "Current model: claude-3-haiku-20240307",
                    }
                }]
            }
            
            async with ClientSession() as session:
                async with session.post(data.hook, json=hook_data,
                            timeout=ClientTimeout(connect=5, sock_read=5), headers={
                                'content-type': 'application/json; charset=utf-8',}) as request:
                    request.raise_for_status()
                    return True
        except:
            traceback.print_exc()
            return False

    async def ai_handler(self, request: Request):
        """
        /ai/base/
        AI BASE Request
        (Requires key)
        """
        
        if not self.util.check_key(request.url.path, request.headers.get('X-Authd-With')):
            raise HTTPException(status_code=403, detail="Unauthorized")
        
        local_llm_headers = {
            'Authorization': f'Bearer {self.constants.LOCAL_LLM_KEY}'
        }
        
        forward_path = self.url_clean_regex.sub('', request.url.path)
        try:
            async with ClientSession() as session:
                async with await session.post(f'{self.constants.LOCAL_LLM_BASE}/{forward_path}',
                                  json=await request.json(),
                                  headers=local_llm_headers,
                                  timeout=ClientTimeout(connect=15, sock_read=30)) as out_request:
                    await self.glob_state.increment_counter('ai_requests')
                    response = await out_request.json()
                    return response
        except Exception as e: # pylint: disable=broad-exception-caught
            logging.error("Error: %s", e)
            return {
                'err': True,
                'errorText': 'General Failure'
            }

    async def ai_openai_handler(self, request: Request):
        """
        /ai/openai/
        AI Request
        (Requires key)
        """
        
        if not self.util.check_key(request.url.path, request.headers.get('X-Authd-With')):
            raise HTTPException(status_code=403, detail="Unauthorized")
        
        """
        TODO: Implement Claude
        Currently only routes to local LLM
        """
        
        local_llm_headers = {
            'Authorization': f'Bearer {self.constants.LOCAL_LLM_KEY}'
        }
        forward_path = self.url_clean_regex.sub('', request.url.path)
        try:
            async with ClientSession() as session:
                async with await session.post(f'{self.constants.LOCAL_LLM_HOST}/{forward_path}',
                                  json=await request.json(),
                                  headers=local_llm_headers,
                                  timeout=ClientTimeout(connect=15, sock_read=30)) as out_request:
                    await self.glob_state.increment_counter('ai_requests')
                    response = await out_request.json()
                    return response
        except Exception as e: # pylint: disable=broad-exception-caught
            logging.error("Error: %s", e)
            return {
                'err': True,
                'errorText': 'General Failure'
            }

    async def ai_hook_handler(self, data: ValidHookSongRequest, request: Request, background_tasks: BackgroundTasks):
        """AI Hook Handler"""
        background_tasks.add_task(self.respond_via_webhook, data, request)
        return {
            'success': True,
        }

    async def ai_song_handler(self, data: ValidAISongRequest, request: Request):
        """
        /ai/song/
        AI (Song Info) Request [Public]
        """
        ai_prompt = "You are a helpful assistant who will provide tidbits of info on songs the user may listen to."
        ai_question = f"I am going to listen to the song \"{data.s}\" by \"{data.a}\"."
        local_llm_headers = {
            'x-api-key': self.constants.CLAUDE_API_KEY,
            'anthropic-version': '2023-06-01',
            'content-type': 'application/json',
        }

        request_data = {
            'model': 'claude-3-haiku-20240307',
            'max_tokens': 512,
            'temperature': 0.6,
            'system': ai_prompt,
            'messages': [
                {
                    "role": "user",
                    "content": ai_question.strip(),
                }
            ]
        }

        try:
            async with ClientSession() as session:
                async with await session.post('https://api.anthropic.com/v1/messages',
                                        json=request_data,
                                        headers=local_llm_headers,
                                        timeout=ClientTimeout(connect=15, sock_read=30)) as request:
                    await self.glob_state.increment_counter('claude_ai_requests')
                    response = await request.json()
                    logging.debug("Response: %s",
                                  response)
                    if response.get('type') == 'error':
                        error_type = response.get('error').get('type')
                        error_message = response.get('error').get('message')
                        result = {
                            'resp': f"{error_type} error ({error_message})"
                        }
                    else:
                        result = {
                            'resp': response.get('content')[0].get('text').strip()
                        }
                        return result
        except Exception as e: # pylint: disable=broad-exception-caught
            logging.error("Error: %s", e)
            return {
                'err': True,
                'errorText': 'General Failure'
            }