import logging
import os
import platform
import shutil
import socket
import string
import subprocess
from datetime import datetime

logger = logging.getLogger()


def launch_url(url):
    logger = logging.getLogger(__name__)

    if shutil.which('xdg-open'):
        opener = 'xdg-open'
    elif shutil.which('open'):
        opener = 'open'
    elif shutil.which('cmd'):
        opener = 'start'
    else:
        error_message = f"No valid launchers found to launch URL: {url}"
        logger.error(error_message)
        raise OSError(error_message)

    try:
        if opener == 'start':
            # For Windows, use 'cmd /c start'
            subprocess.run(['cmd', '/c', 'start', url], shell=False)
        else:
            subprocess.run([opener, url])
    except Exception as e:
        logger.error(f"Failed to launch URL: {url}. Error: {e}")


def file_exists_in_mounts(filepath):
    """
    Check if a file exists in any mounted directory.
    It searches for the file in common mount points like '/Volumes', '/mnt', and '/media'.
    Returns the path to the file in the mount if found, otherwise returns None.

    Example:
    Before: filepath = '/path/to/file.txt'
    After: '/Volumes/ExternalDrive/path/to/file.txt'
    """

    def get_path_components(path):
        path = os.path.normpath(path)
        components = []
        while True:
            path, comp = os.path.split(path)
            if comp:
                components.append(comp)
            else:
                if path:
                    components.append(path)
                break
        components.reverse()
        return components

    # Get path components of the directory of the file
    path_components = get_path_components(os.path.dirname(filepath).strip('/'))

    # Iterate over possible root paths - this may need to be rethought for Windows support
    for root in ['/Volumes', '/mnt', '/media']:
        if os.path.exists(root):
            # Iterate over mounts in the root path
            for mount in os.listdir(root):
                # Since we don't know the home directory, we iterate until we find matching parts of the path
                matching_components = [s for s in path_components if s in mount]
                for component in matching_components:
                    possible_mount_path = os.path.join(root, mount, filepath.split(component)[-1].lstrip('/'))
                    if os.path.exists(possible_mount_path):
                        return possible_mount_path


def get_time_elapsed(start_time=None, end_time=None):

    def strfdelta(tdelta, fmt='%H:%M:%S'):
        days = tdelta.days
        hours, rem = divmod(tdelta.seconds, 3600)
        minutes, seconds = divmod(rem, 60)

        # Using f-strings for formatting
        formatted_str = fmt.replace('%D', f'{days}')
        formatted_str = formatted_str.replace('%H', f'{hours:02d}')
        formatted_str = formatted_str.replace('%M', f'{minutes:02d}')
        formatted_str = formatted_str.replace('%S', f'{seconds:02d}')
        return formatted_str

    # calculate elapsed time
    elapsed_time = None

    if start_time:
        if end_time:
            elapsed_time = end_time - start_time
        else:
            elapsed_time = datetime.now() - start_time

    elapsed_time_string = strfdelta(elapsed_time) if elapsed_time else None
    return elapsed_time_string


def get_file_size_human(file_path):
    size_in_bytes = os.path.getsize(file_path)

    # Convert size to a human-readable format
    if size_in_bytes < 1024:
        return f"{size_in_bytes} B"
    elif size_in_bytes < 1024 ** 2:
        return f"{size_in_bytes / 1024:.2f} KB"
    elif size_in_bytes < 1024 ** 3:
        return f"{size_in_bytes / 1024 ** 2:.2f} MB"
    elif size_in_bytes < 1024 ** 4:
        return f"{size_in_bytes / 1024 ** 3:.2f} GB"
    else:
        return f"{size_in_bytes / 1024 ** 4:.2f} TB"


# Convert path to the appropriate format for the current platform
def system_safe_path(path):
    if platform.system().lower() == "windows":
        return os.path.normpath(path)
    return path.replace("\\", "/")


def current_system_os():
    return platform.system().lower().replace('darwin', 'macos')


def current_system_os_version():
    return platform.mac_ver()[0] if current_system_os() == 'macos' else platform.release().lower()


def current_system_cpu():
    # convert all x86 64 to "x64"
    return platform.machine().lower().replace('amd64', 'x64').replace('x86_64', 'x64')


def resources_dir():
    resource_environment_path = os.environ.get('RESOURCEPATH', None)
    if resource_environment_path:  # running inside resource bundle
        return os.path.join(resource_environment_path, 'resources')
    else:
        return os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))), 'resources')


def copy_directory_contents(src_dir, dst_dir):
    """
    Copy the contents of the source directory (src_dir) to the destination directory (dst_dir).
    """
    for item in os.listdir(src_dir):
        src_path = os.path.join(src_dir, item)
        dst_path = os.path.join(dst_dir, item)
        if os.path.isdir(src_path):
            shutil.copytree(src_path, dst_path, dirs_exist_ok=True)
        else:
            shutil.copy2(src_path, dst_path)


def is_localhost(comparison_hostname):
    # this is necessary because socket.gethostname() does not always include '.local' - This is a sanitized comparison
    try:
        comparison_hostname = comparison_hostname.lower().replace('.local', '')
        local_hostname = socket.gethostname().lower().replace('.local', '')
        return comparison_hostname == local_hostname
    except AttributeError:
        return False


def num_to_alphanumeric(num):
    # List of possible alphanumeric characters
    characters = string.ascii_letters + string.digits

    # Make sure number is positive
    num = abs(num)

    # Convert number to alphanumeric
    result = ""
    while num > 0:
        num, remainder = divmod(num, len(characters))
        result += characters[remainder]

    return result[::-1]  # Reverse the result to get the correct alphanumeric string