import os
import re
import shutil
from functools import partial
from http.server import HTTPServer, SimpleHTTPRequestHandler
from pathlib import Path

from PIL import Image


def read_file(file_path):
    with open(file_path, 'r') as f:
        file_content = f.read()
    return file_content


def write_file(file_path, content):
    os.makedirs(os.path.dirname(file_path), exist_ok=True)
    with open(file_path, 'w') as f:
        f.write(content)


def copy_file(src, dst):
    os.makedirs(os.path.dirname(dst), exist_ok=True)
    shutil.copy2(src, dst)


# Функция для запуска веб-сервера
def start_httpd(directory: Path, port: int = 8000, interface: str = 'localhost'):
    print(f"Listen on http://{interface}:{port}, serving from '{directory}' directory...")
    handler = partial(SimpleHTTPRequestHandler, directory=directory)
    httpd = HTTPServer((interface, port), handler)
    httpd.serve_forever()


# Функция для генерации jpeg миниатюры
def create_thumbnail(source_path, dest_path, size):  
    with Image.open(source_path) as img:
        if img.mode != "RGB":
            img = img.convert("RGB")
        img.thumbnail((size, size))
        img.save(dest_path, "JPEG", optimize=True, quality=80)


# This function was writenn in 2014 by some good guy: https://github.com/bmcculley/minify/blob/master/cssmin.py
def minify_css(saveFileName, css):
    os.makedirs(os.path.dirname(saveFileName), exist_ok=True)
    # remove comments - this will break a lot of hacks :-P
    css = re.sub( r'\s*/\*\s*\*/', "$$HACK1$$", css ) # preserve IE<6 comment hack
    css = re.sub( r'/\*[\s\S]*?\*/', "", css )
    css = css.replace( "$$HACK1$$", '/**/' ) # preserve IE<6 comment hack

    # url() doesn't need quotes
    css = re.sub( r'url\((["\'])([^)]*)\1\)', r'url(\2)', css )

    # spaces may be safely collapsed as generated content will collapse them anyway
    css = re.sub( r'\s+', ' ', css )

    # shorten collapsable colors: #aabbcc to #abc
    css = re.sub( r'#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3(\s|;)', r'#\1\2\3\4', css )

    # fragment values can loose zeros
    css = re.sub( r':\s*0(\.\d+([cm]m|e[mx]|in|p[ctx]))\s*;', r':\1;', css )

    for rule in re.findall( r'([^{]+){([^}]*)}', css ):

        # we don't need spaces around operators
        selectors = [re.sub( r'(?<=[\[\(>+=])\s+|\s+(?=[=~^$*|>+\]\)])', r'', selector.strip() ) for selector in rule[0].split( ',' )]

        # order is important, but we still want to discard repetitions
        properties = {}
        porder = []
        for prop in re.findall( '(.*?):(.*?)(;|$)', rule[1] ):
            key = prop[0].strip().lower()
            if key not in porder: porder.append( key )
            properties[ key ] = prop[1].strip()

        # output rule if it contains any declarations
        if properties:
            f = open(saveFileName,'a')
            f.write( "%s{%s}" % ( ','.join( selectors ), ''.join(['%s:%s;' % (key, properties[key]) for key in porder])[:-1] ) )
            f.close()