"""
description:
    `manager_util` is the lightest module shared across the prestartup_script, main code, and cm-cli of ComfyUI-Manager.
"""
import traceback

import aiohttp
import json
import threading
import os
import subprocess
import sys
import re
import logging
import platform
import shlex
import time
from functools import lru_cache


cache_lock = threading.Lock()
session_lock = threading.Lock()

comfyui_manager_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
cache_dir = os.path.join(comfyui_manager_path, '.cache')  # This path is also updated together in **manager_core.update_user_directory**.

use_uv = False
bypass_ssl = False

def is_manager_pip_package():
    return not os.path.exists(os.path.join(comfyui_manager_path, '..', 'custom_nodes'))

def add_python_path_to_env():
    if platform.system() != "Windows":
        sep = ':'
    else:
        sep = ';'

    os.environ['PATH'] = os.path.dirname(sys.executable)+sep+os.environ['PATH']


@lru_cache(maxsize=2)
def get_pip_cmd(force_uv=False):
    """
    Get the base pip command, with automatic fallback to uv if pip is unavailable.

    Args:
        force_uv (bool): If True, use uv directly without trying pip

    Returns:
        list: Base command for pip operations
    """
    embedded = 'python_embeded' in sys.executable

    # Try pip first (unless forcing uv)
    if not force_uv:
        try:
            test_cmd = [sys.executable] + (['-s'] if embedded else []) + ['-m', 'pip', '--version']
            subprocess.check_output(test_cmd, stderr=subprocess.DEVNULL, timeout=5)
            return [sys.executable] + (['-s'] if embedded else []) + ['-m', 'pip']
        except Exception:
            logging.warning("[ComfyUI-Manager] python -m pip not available. Falling back to uv.")

    # Try uv (either forced or pip failed)
    import shutil

    # Try uv as Python module
    try:
        test_cmd = [sys.executable] + (['-s'] if embedded else []) + ['-m', 'uv', '--version']
        subprocess.check_output(test_cmd, stderr=subprocess.DEVNULL, timeout=5)
        logging.info("[ComfyUI-Manager] Using uv as Python module for pip operations.")
        return [sys.executable] + (['-s'] if embedded else []) + ['-m', 'uv', 'pip']
    except Exception:
        pass

    # Try standalone uv
    if shutil.which('uv'):
        logging.info("[ComfyUI-Manager] Using standalone uv for pip operations.")
        return ['uv', 'pip']

    # Nothing worked
    logging.error("[ComfyUI-Manager] Neither python -m pip nor uv are available. Cannot proceed with package operations.")
    raise Exception("Neither pip nor uv are available for package management")


def make_pip_cmd(cmd):
    """
    Create a pip command by combining the cached base pip command with the given arguments.

    Args:
        cmd (list): List of pip command arguments (e.g., ['install', 'package'])

    Returns:
        list: Complete command list ready for subprocess execution
    """
    global use_uv
    base_cmd = get_pip_cmd(force_uv=use_uv)
    return base_cmd + cmd


# DON'T USE StrictVersion - cannot handle pre_release version
# try:
#     from distutils.version import StrictVersion
# except Exception:
#     print(f"[ComfyUI-Manager]  'distutils' package not found. Activating fallback mode for compatibility.")
class StrictVersion:
    def __init__(self, version_string):
        self.version_string = version_string
        self.major = 0
        self.minor = 0
        self.patch = 0
        self.pre_release = None
        self.parse_version_string()

    def parse_version_string(self):
        parts = self.version_string.split('.')
        if not parts:
            raise ValueError("Version string must not be empty")

        self.major = int(parts[0])
        self.minor = int(parts[1]) if len(parts) > 1 else 0
        self.patch = int(parts[2]) if len(parts) > 2 else 0

        # Handling pre-release versions if present
        if len(parts) > 3:
            self.pre_release = parts[3]

    def __str__(self):
        version = f"{self.major}.{self.minor}.{self.patch}"
        if self.pre_release:
            version += f"-{self.pre_release}"
        return version

    def __eq__(self, other):
        return (self.major, self.minor, self.patch, self.pre_release) == \
            (other.major, other.minor, other.patch, other.pre_release)

    def __lt__(self, other):
        if (self.major, self.minor, self.patch) == (other.major, other.minor, other.patch):
            return self.pre_release_compare(self.pre_release, other.pre_release) < 0
        return (self.major, self.minor, self.patch) < (other.major, other.minor, other.patch)

    @staticmethod
    def pre_release_compare(pre1, pre2):
        if pre1 == pre2:
            return 0
        if pre1 is None:
            return 1
        if pre2 is None:
            return -1
        return -1 if pre1 < pre2 else 1

    def __le__(self, other):
        return self == other or self < other

    def __gt__(self, other):
        return not self <= other

    def __ge__(self, other):
        return not self < other

    def __ne__(self, other):
        return not self == other


def simple_hash(input_string):
    hash_value = 0
    for char in input_string:
        hash_value = (hash_value * 31 + ord(char)) % (2**32)

    return hash_value


def is_file_created_within_one_day(file_path):
    if not os.path.exists(file_path):
        return False

    file_creation_time = os.path.getctime(file_path)
    current_time = time.time()
    time_difference = current_time - file_creation_time

    return time_difference <= 86400


async def get_data(uri, silent=False):
    if not silent:
        print(f"FETCH DATA from: {uri}", end="")

    if uri.startswith("http"):
        async with aiohttp.ClientSession(trust_env=True, connector=aiohttp.TCPConnector(verify_ssl=not bypass_ssl)) as session:
            headers = {
                'Cache-Control': 'no-cache',
                'Pragma': 'no-cache',
                'Expires': '0'
            }
            async with session.get(uri, headers=headers) as resp:
                json_text = await resp.text()
    else:
        with cache_lock:
            with open(uri, "r", encoding="utf-8") as f:
                json_text = f.read()

    try:
        json_obj = json.loads(json_text)
    except Exception as e:
        logging.error(f"[ComfyUI-Manager] An error occurred while fetching '{uri}': {e}")

        return {}

    if not silent:
        print(" [DONE]")

    return json_obj


def get_cache_path(uri):
    cache_uri = str(simple_hash(uri)) + '_' + os.path.basename(uri).replace('&', "_").replace('?', "_").replace('=', "_")
    return os.path.join(cache_dir, cache_uri+'.json')


def get_cache_state(uri):
    cache_uri = get_cache_path(uri)

    if not os.path.exists(cache_uri):
        return "not-cached"
    elif is_file_created_within_one_day(cache_uri):
        return "cached"

    return "expired"


def save_to_cache(uri, json_obj, silent=False):
    cache_uri = get_cache_path(uri)

    with cache_lock:
        with open(cache_uri, "w", encoding='utf-8') as file:
            json.dump(json_obj, file, indent=4, sort_keys=True)
            if not silent:
                logging.info(f"[ComfyUI-Manager] default cache updated: {uri}")


async def get_data_with_cache(uri, silent=False, cache_mode=True, dont_wait=False, dont_cache=False):
    cache_uri = get_cache_path(uri)

    if cache_mode and dont_wait:
        # NOTE: return the cache if possible, even if it is expired, so do not cache
        if not os.path.exists(cache_uri):
            logging.error(f"[ComfyUI-Manager] The network connection is unstable, so it is operating in fallback mode: {uri}")

            return {}
        else:
            if not is_file_created_within_one_day(cache_uri):
                logging.error(f"[ComfyUI-Manager] The network connection is unstable, so it is operating in outdated cache mode: {uri}")

            return await get_data(cache_uri, silent=silent)

    if cache_mode and is_file_created_within_one_day(cache_uri):
        json_obj = await get_data(cache_uri, silent=silent)
    else:
        json_obj = await get_data(uri, silent=silent)
        if not dont_cache:
            with cache_lock:
                with open(cache_uri, "w", encoding='utf-8') as file:
                    json.dump(json_obj, file, indent=4, sort_keys=True)
                    if not silent:
                        logging.info(f"[ComfyUI-Manager] default cache updated: {uri}")

    return json_obj


def sanitize_tag(x):
    return x.replace('<', '&lt;').replace('>', '&gt;')


def extract_package_as_zip(file_path, extract_path):
    import zipfile
    try:
        with zipfile.ZipFile(file_path, "r") as zip_ref:
            zip_ref.extractall(extract_path)
            extracted_files = zip_ref.namelist()
        logging.info(f"Extracted zip file to {extract_path}")
        return extracted_files
    except zipfile.BadZipFile:
        logging.error(f"File '{file_path}' is not a zip or is corrupted.")
        return None


pip_map = None


def get_installed_packages(renew=False):
    global pip_map

    if renew or pip_map is None:
        try:
            result = subprocess.check_output(make_pip_cmd(['list']), universal_newlines=True)

            pip_map = {}
            for line in result.split('\n'):
                x = line.strip()
                if x:
                    y = line.split()
                    if y[0] == 'Package' or y[0].startswith('-'):
                        continue

                    normalized_name = y[0].lower().replace('-', '_')
                    pip_map[normalized_name] = y[1]
        except subprocess.CalledProcessError:
            logging.error("[ComfyUI-Manager] Failed to retrieve the information of installed pip packages.")
            return {}

    return pip_map


def clear_pip_cache():
    global pip_map
    pip_map = None


def parse_requirement_line(line):
    tokens = shlex.split(line)
    if not tokens:
        return None

    package_spec = tokens[0]

    pattern = re.compile(
        r'^(?P<package>[A-Za-z0-9_.+-]+)'
        r'(?P<operator>==|>=|<=|!=|~=|>|<)?'
        r'(?P<version>[A-Za-z0-9_.+-]*)$'
    )
    m = pattern.match(package_spec)
    if not m:
        return None

    package = m.group('package')
    operator = m.group('operator') or None
    version = m.group('version') or None

    index_url = None
    if '--index-url' in tokens:
        idx = tokens.index('--index-url')
        if idx + 1 < len(tokens):
            index_url = tokens[idx + 1]

    res = {'package': package}

    if operator is not None:
        res['operator'] = operator

    if version is not None:
        res['version'] = StrictVersion(version)

    if index_url is not None:
        res['index_url'] = index_url

    return res


torch_torchvision_torchaudio_version_map = {
    '2.7.0': ('0.22.0', '2.7.0'),
    '2.6.0': ('0.21.0', '2.6.0'),
    '2.5.1': ('0.20.0', '2.5.0'),
    '2.5.0': ('0.20.0', '2.5.0'),
    '2.4.1': ('0.19.1', '2.4.1'),
    '2.4.0': ('0.19.0', '2.4.0'),
    '2.3.1': ('0.18.1', '2.3.1'),
    '2.3.0': ('0.18.0', '2.3.0'),
    '2.2.2': ('0.17.2', '2.2.2'),
    '2.2.1': ('0.17.1', '2.2.1'),
    '2.2.0': ('0.17.0', '2.2.0'),
    '2.1.2': ('0.16.2', '2.1.2'),
    '2.1.1': ('0.16.1', '2.1.1'),
    '2.1.0': ('0.16.0', '2.1.0'),
    '2.0.1': ('0.15.2', '2.0.1'),
    '2.0.0': ('0.15.1', '2.0.0'),
}


def torch_rollback(prev):
    spec = prev.split('+')
    if len(spec) > 1:
        platform = spec[1]
    else:
        cmd = make_pip_cmd(['install', '--force', 'torch', 'torchvision', 'torchaudio'])
        subprocess.check_output(cmd, universal_newlines=True)
        logging.error(cmd)
        return

    torch_ver = StrictVersion(spec[0])
    torch_ver = f"{torch_ver.major}.{torch_ver.minor}.{torch_ver.patch}"
    torch_torchvision_torchaudio_ver = torch_torchvision_torchaudio_version_map.get(torch_ver)

    if torch_torchvision_torchaudio_ver is None:
        cmd = make_pip_cmd(['install', '--pre', 'torch', 'torchvision', 'torchaudio',
                            '--index-url', f"https://download.pytorch.org/whl/nightly/{platform}"])
        logging.info("[ComfyUI-Manager] restore PyTorch to nightly version")
    else:
        torchvision_ver, torchaudio_ver = torch_torchvision_torchaudio_ver
        cmd = make_pip_cmd(['install', f'torch=={torch_ver}', f'torchvision=={torchvision_ver}', f"torchaudio=={torchaudio_ver}",
                            '--index-url', f"https://download.pytorch.org/whl/{platform}"])
        logging.info(f"[ComfyUI-Manager] restore PyTorch to {torch_ver}+{platform}")

    subprocess.check_output(cmd, universal_newlines=True)


class PIPFixer:
    def __init__(self, prev_pip_versions, comfyui_path, manager_files_path):
        self.prev_pip_versions = { **prev_pip_versions }
        self.comfyui_path = comfyui_path
        self.manager_files_path = manager_files_path

    def fix_broken(self):
        new_pip_versions = get_installed_packages(True)

        # remove `comfy` python package
        try:
            if 'comfy' in new_pip_versions:
                cmd = make_pip_cmd(['uninstall', 'comfy'])
                subprocess.check_output(cmd, universal_newlines=True)

                logging.warning("[ComfyUI-Manager] 'comfy' python package is uninstalled.\nWARN: The 'comfy' package is completely unrelated to ComfyUI and should never be installed as it causes conflicts with ComfyUI.")
        except Exception as e:
            logging.error("[ComfyUI-Manager] Failed to uninstall `comfy` python package")
            logging.error(e)

        # fix torch - reinstall torch packages if version is changed
        try:
            if 'torch' not in self.prev_pip_versions or 'torchvision' not in self.prev_pip_versions or 'torchaudio' not in self.prev_pip_versions:
                logging.error("[ComfyUI-Manager] PyTorch is not installed")
            elif self.prev_pip_versions['torch'] != new_pip_versions['torch'] \
                or self.prev_pip_versions['torchvision'] != new_pip_versions['torchvision'] \
                or self.prev_pip_versions['torchaudio'] != new_pip_versions['torchaudio']:
                    torch_rollback(self.prev_pip_versions['torch'])
        except Exception as e:
            logging.error("[ComfyUI-Manager] Failed to restore PyTorch")
            logging.error(e)

        # fix opencv
        try:
            ocp = new_pip_versions.get('opencv-contrib-python')
            ocph = new_pip_versions.get('opencv-contrib-python-headless')
            op = new_pip_versions.get('opencv-python')
            oph = new_pip_versions.get('opencv-python-headless')

            versions = [ocp, ocph, op, oph]
            versions = [StrictVersion(x) for x in versions if x is not None]
            versions.sort(reverse=True)

            if len(versions) > 0:
                # upgrade to maximum version
                targets = []
                cur = versions[0]
                if ocp is not None and StrictVersion(ocp) != cur:
                    targets.append('opencv-contrib-python')
                if ocph is not None and StrictVersion(ocph) != cur:
                    targets.append('opencv-contrib-python-headless')
                if op is not None and StrictVersion(op) != cur:
                    targets.append('opencv-python')
                if oph is not None and StrictVersion(oph) != cur:
                    targets.append('opencv-python-headless')

                if len(targets) > 0:
                    for x in targets:
                        cmd = make_pip_cmd(['install', f"{x}=={versions[0].version_string}"])
                        subprocess.check_output(cmd, universal_newlines=True)

                    logging.info(f"[ComfyUI-Manager] 'opencv' dependencies were fixed: {targets}")
        except Exception as e:
            logging.error("[ComfyUI-Manager] Failed to restore opencv")
            logging.error(e)

        # fix missing frontend
        try:
            # NOTE: package name in requirements is 'comfyui-frontend-package'
            #       but, package name from `pip freeze` is 'comfyui_frontend_package'
            #       but, package name from `uv pip freeze` is 'comfyui-frontend-package'
            #
            #       get_installed_packages returns normalized name (i.e. comfyui_frontend_package)
            if 'comfyui_frontend_package' not in new_pip_versions:
                requirements_path = os.path.join(self.comfyui_path, 'requirements.txt')

                with open(requirements_path, 'r') as file:
                    lines = file.readlines()
                
                front_line = next((line.strip() for line in lines if line.startswith('comfyui-frontend-package')), None)
                if front_line is None:
                    logging.info("[ComfyUI-Manager] Skipped fixing the 'comfyui-frontend-package' dependency because the ComfyUI is outdated.")
                else:
                    cmd = make_pip_cmd(['install', front_line])
                    subprocess.check_output(cmd , universal_newlines=True)
                    logging.info("[ComfyUI-Manager] 'comfyui-frontend-package' dependency were fixed")
        except Exception as e:
            logging.error("[ComfyUI-Manager] Failed to restore comfyui-frontend-package")
            logging.error(e)

        # restore based on custom list
        pip_auto_fix_path = os.path.join(self.manager_files_path, "pip_auto_fix.list")
        if os.path.exists(pip_auto_fix_path):
            with open(pip_auto_fix_path, 'r', encoding="UTF-8", errors="ignore") as f:
                fixed_list = []

                for x in f.readlines():
                    try:
                        parsed = parse_requirement_line(x)
                        need_to_reinstall = True

                        normalized_name = parsed['package'].lower().replace('-', '_')
                        if normalized_name in new_pip_versions:
                            if 'version' in parsed and 'operator' in parsed:
                                cur = StrictVersion(new_pip_versions[normalized_name])
                                dest = parsed['version']
                                op = parsed['operator']
                                if cur == dest:
                                    if op in ['==', '>=', '<=']:
                                        need_to_reinstall = False
                                elif cur < dest:
                                    if op in ['<=', '<', '~=', '!=']:
                                        need_to_reinstall = False
                                elif cur > dest:
                                    if op in ['>=', '>', '~=', '!=']:
                                        need_to_reinstall = False

                        if need_to_reinstall:
                            cmd_args = ['install']
                            if 'version' in parsed and 'operator' in parsed:
                                cmd_args.append(parsed['package']+parsed['operator']+parsed['version'].version_string)

                            if 'index_url' in parsed:
                                cmd_args.append('--index-url')
                                cmd_args.append(parsed['index_url'])

                            cmd = make_pip_cmd(cmd_args)
                            subprocess.check_output(cmd, universal_newlines=True)

                            fixed_list.append(parsed['package'])
                    except Exception as e:
                        traceback.print_exc()
                        logging.error(f"[ComfyUI-Manager] Failed to restore '{x}'")
                        logging.error(e)

                if len(fixed_list) > 0:
                    logging.info(f"[ComfyUI-Manager] dependencies in pip_auto_fix.json were fixed: {fixed_list}")

def sanitize(data):
    return data.replace("<", "&lt;").replace(">", "&gt;")


def sanitize_filename(input_string):
    result_string = re.sub(r'[^a-zA-Z0-9_]', '_', input_string)
    return result_string


def robust_readlines(fullpath):
    import chardet
    try:
        with open(fullpath, "r") as f:
            return f.readlines()
    except Exception:
        encoding = None
        with open(fullpath, "rb") as f:
            raw_data = f.read()
            result = chardet.detect(raw_data)
            encoding = result['encoding']

        if encoding is not None:
            with open(fullpath, "r", encoding=encoding) as f:
                return f.readlines()

        print(f"[ComfyUI-Manager] Failed to recognize encoding for: {fullpath}")
        return []


def restore_pip_snapshot(pips, options):
    non_url = []
    local_url = []
    non_local_url = []

    for k, v in pips.items():
        # NOTE: skip torch related packages
        if k.startswith("torch==") or k.startswith("torchvision==") or k.startswith("torchaudio==") or k.startswith("nvidia-"):
            continue

        if v == "":
            non_url.append(k)
        else:
            if v.startswith('file:'):
                local_url.append(v)
            else:
                non_local_url.append(v)


    # restore other pips
    failed = []
    if '--pip-non-url' in options:
        # try all at once
        res = 1
        try:
            res = subprocess.check_output(make_pip_cmd(['install'] + non_url))
        except Exception:
            pass

        # fallback
        if res != 0:
            for x in non_url:
                res = 1
                try:
                    res = subprocess.check_output(make_pip_cmd(['install', '--no-deps', x]))
                except Exception:
                    pass

                if res != 0:
                    failed.append(x)

    if '--pip-non-local-url' in options:
        for x in non_local_url:
            res = 1
            try:
                res = subprocess.check_output(make_pip_cmd(['install', '--no-deps', x]))
            except Exception:
                pass

            if res != 0:
                failed.append(x)

    if '--pip-local-url' in options:
        for x in local_url:
            res = 1
            try:
                res = subprocess.check_output(make_pip_cmd(['install', '--no-deps', x]))
            except Exception:
                pass

            if res != 0:
                failed.append(x)

    print(f"Installation failed for pip packages: {failed}")