import base64
import os
import queue
import re
import logging
from io import BytesIO
from subprocess import PIPE
from typing import Optional, Union

import jupyter_client
from PIL import Image

# 获取模块级 logger
logger = logging.getLogger(__name__)

IPYKERNEL = os.environ.get('IPYKERNEL', 'chatglm3')


class CodeKernel(object):
    def __init__(self,
                 kernel_name='kernel',
                 kernel_id=None,
                 kernel_config_path="",
                 python_path=None,
                 ipython_path=None,
                 init_file_path="./startup.py",
                 verbose=1):

        self.kernel_name = kernel_name
        self.kernel_id = kernel_id
        self.kernel_config_path = kernel_config_path
        self.python_path = python_path
        self.ipython_path = ipython_path
        self.init_file_path = init_file_path
        self.verbose = verbose

        if python_path is None and ipython_path is None:
            env = None
        else:
            env = {"PATH": self.python_path + ":$PATH",
                   "PYTHONPATH": self.python_path}

        # Initialize the backend kernel
        self.kernel_manager = jupyter_client.KernelManager(kernel_name=IPYKERNEL,
                                                           connection_file=self.kernel_config_path,
                                                           exec_files=[
                                                               self.init_file_path],
                                                           env=env)
        if self.kernel_config_path:
            self.kernel_manager.load_connection_file()
            self.kernel_manager.start_kernel(stdout=PIPE, stderr=PIPE)
            logger.info("Backend kernel started with the configuration: %s", 
                self.kernel_config_path)
        else:
            self.kernel_manager.start_kernel(stdout=PIPE, stderr=PIPE)
            logger.info("Backend kernel started with the configuration: %s", 
                self.kernel_manager.connection_file)

        if verbose:
            logger.debug(self.kernel_manager.get_connection_info())

        # Initialize the code kernel
        self.kernel = self.kernel_manager.blocking_client()
        # self.kernel.load_connection_file()
        self.kernel.start_channels()
        logger.info("Code kernel started.")

    def execute(self, code):
        self.kernel.execute(code)
        try:
            shell_msg = self.kernel.get_shell_msg(timeout=40)
            io_msg_content = self.kernel.get_iopub_msg(timeout=40)['content']
            while True:
                msg_out = io_msg_content
                # Poll the message
                try:
                    io_msg_content = self.kernel.get_iopub_msg(timeout=40)[
                        'content']
                    if 'execution_state' in io_msg_content and io_msg_content['execution_state'] == 'idle':
                        break
                except queue.Empty:
                    break

            return shell_msg, msg_out
        except Exception as e:
            logger.error("执行代码时出错: %s", str(e), exc_info=True)
            return None

    def execute_interactive(self, code, verbose=False):
        shell_msg = self.kernel.execute_interactive(code)
        if shell_msg is queue.Empty:
            if verbose:
                logger.warning("Timeout waiting for shell message.")
        self.check_msg(shell_msg, verbose=verbose)

        return shell_msg

    def inspect(self, code, verbose=False):
        msg_id = self.kernel.inspect(code)
        shell_msg = self.kernel.get_shell_msg(timeout=30)
        if shell_msg is queue.Empty:
            if verbose:
                logger.warning("Timeout waiting for shell message.")
        self.check_msg(shell_msg, verbose=verbose)

        return shell_msg

    def get_error_msg(self, msg, verbose=False) -> Optional[str]:
        if msg['content']['status'] == 'error':
            try:
                error_msg = msg['content']['traceback']
            except BaseException:
                try:
                    error_msg = msg['content']['traceback'][-1].strip()
                except BaseException:
                    error_msg = "Traceback Error"
            if verbose:
                logger.error("Error: %s", error_msg)
            return error_msg
        return None

    def check_msg(self, msg, verbose=False):
        status = msg['content']['status']
        if status == 'ok':
            if verbose:
                logger.info("Execution succeeded.")
        elif status == 'error':
            for line in msg['content']['traceback']:
                if verbose:
                    logger.error(line)

    def shutdown(self):
        # Shutdown the backend kernel
        self.kernel_manager.shutdown_kernel()
        logger.info("Backend kernel shutdown.")
        # Shutdown the code kernel
        self.kernel.shutdown()
        logger.info("Code kernel shutdown.")

    def restart(self):
        # Restart the backend kernel
        self.kernel_manager.restart_kernel()
        # logger.info("Backend kernel restarted.")

    def interrupt(self):
        # Interrupt the backend kernel
        self.kernel_manager.interrupt_kernel()
        # logger.info("Backend kernel interrupted.")

    def is_alive(self):
        return self.kernel.is_alive()


def b64_2_img(data):
    buff = BytesIO(base64.b64decode(data))
    return Image.open(buff)


def clean_ansi_codes(input_string):
    ansi_escape = re.compile(r'(\x9B|\x1B\[|\u001b\[)[0-?]*[ -/]*[@-~]')
    return ansi_escape.sub('', input_string)


def execute(code, kernel: CodeKernel) -> tuple[str, Union[str, Image.Image]]:
    res = ""
    res_type = None
    code = code.replace("<|observation|>", "")
    code = code.replace("<|assistant|>interpreter", "")
    code = code.replace("<|assistant|>", "")
    code = code.replace("<|user|>", "")
    code = code.replace("<|system|>", "")
    msg, output = kernel.execute(code)

    if msg['metadata']['status'] == "timeout":
        return res_type, 'Timed out'
    elif msg['metadata']['status'] == 'error':
        return res_type, clean_ansi_codes('\n'.join(kernel.get_error_msg(msg, verbose=True)))

    if 'text' in output:
        res_type = "text"
        res = output['text']
    elif 'data' in output:
        for key in output['data']:
            if 'image/png' in key:
                res_type = "image"
                res = output['data'][key]
                break
            elif 'text/plain' in key:
                res_type = "text"
                res = output['data'][key]

    if res_type == "image":
        return res_type, b64_2_img(res)
    elif res_type == "text" or res_type == "traceback":
        res = res

    return res_type, res


def extract_code(text: str) -> str:
    pattern = r'```([^\n]*)\n(.*?)```'
    matches = re.findall(pattern, text, re.DOTALL)
    return matches[-1][1]