import struct
import sys
import os
from argparse import ArgumentParser

try:
    import colorama
    from colorama import Fore, Style
    colorama.init()
    TRESET = Style.RESET_ALL
    TGREEN = Fore.GREEN
    TGREENLIT = Style.BRIGHT + Fore.GREEN
    TYELLOW = Fore.YELLOW
    TYELLOWLIT = Style.BRIGHT + Fore.YELLOW
    TRED = Fore.RED
    TREDLIT = Style.BRIGHT + Fore.RED

except ImportError:
    TRESET = ''
    TGREEN = ''
    TGREENLIT = ''
    TYELLOW = ''
    TYELLOWLIT = ''
    TRED = ''
    TREDLIT = ''

def read_sbyte(f):
    return struct.unpack("b", f.read(1))[0]

def write_sbyte(f):
    struct.unpack("b", f.read(1))

def read_sint16(f):
    return struct.unpack(">h", f.read(4))[0]

def write_sint16(f, val):
    f.write(struct.pack(">h", val))

def read_sint32(f):
    return struct.unpack(">i", f.read(4))[0]

def write_sint32(f, val):
    f.write(struct.pack(">i", val))

def read_float(f):
    return struct.unpack(">f", f.read(4))[0]

def write_float(f, val):
    f.write(struct.pack(">f", val))

def read_double(f):
    return struct.unpack(">d", f.read(4))[0]

def write_double(f, val):
    f.write(struct.pack(">d", val))

def read_ubyte(f):
    return struct.unpack("B", f.read(1))[0]

def write_ubyte(f):
    struct.unpack("B", f.read(1))

def read_uint16(f):
    return struct.unpack(">H", f.read(4))[0]

def write_uint16(f, val):
    f.write(struct.pack(">H", val))

def read_uint32(f):
    return struct.unpack(">I", f.read(4))[0]

def write_uint32(f, val):
    f.write(struct.pack(">I", val))

def read_float(f):
    return struct.unpack(">f", f.read(4))[0]

def write_float(f, val):
    f.write(struct.pack(">f", val))

def read_double(f):
    return struct.unpack(">d", f.read(4))[0]

def write_double(f, val):
    f.write(struct.pack(">d", val))

def color_text(text: str, textToColor: list=[('', None)], defaultColor: str=None):
    currentColor = None
    formattedText = ''

    format = False
    for itemPair in textToColor:
        if itemPair[0] != '' and itemPair[1] is not None:
            format = True
            break

    if not format:
        return defaultColor + text + TRESET

    for char in text:
        handled = False
        for itemPair in textToColor:
            if (char in itemPair[0] or '\*' in itemPair[0]) and itemPair[1] is not None:
                if currentColor != itemPair[1]:
                    formattedText += TRESET
                    formattedText += itemPair[1]
                    currentColor = itemPair[1]
                handled = True

            elif defaultColor is not None:
                formattedText += TRESET
                formattedText += defaultColor
                currentColor = defaultColor

            elif currentColor is not None:
                formattedText += TRESET
                currentColor = None

            if handled:
                break

        formattedText += char

    return formattedText + TRESET

class CommandLineParser(ArgumentParser):
    
    def error(self, message: str, prefix: str=None, print_usage=True, exit=True):
        if print_usage:
            self.print_usage(sys.stderr)

        if prefix is None:
            if exit:
                self.exit(2, f'{self.prog}: error: {message}\n')
            else:
                self._print_message(f'{self.prog}: error: {message}\n')
        else:
            if exit:
                self.exit(2, f'{prefix} {message}\n')
            else:
                self._print_message(f'{prefix} {message}\n')