#!/usr/local/bin/python

import glob
import filecmp
import hashlib
import os.path
import platform
import copy
import sys
import shutil
import operator
import json
import datetime
import math
import logging as log

from os.path import normpath
import os

import inspect

StartTime = datetime.datetime.now()
EndTime = datetime.datetime.now()

# --- Strings

def ToUpper(string):
    return string.upper()

def InsertStringInFilePath(file_path, string, file_extension):
    ext_len = len(file_extension) + 1
    file_path_p = file_path[:-ext_len] + '-' + string + file_path[-ext_len:]
    return file_path_p

# --- Strings

def LoadClassFromModule(module_name, class_name):

    __module = __import__(module_name)
    if __module:
        __class = getattr(__module, class_name)

        if __class:    
            return __class
        else:
            log.error("No class " + class_name + " found inside module " + module_name)
            return None
    else:
        log.error("No module " + module_name + " found")
        return None

def LoadFunctionFromModule(module_name, function_name):

    __module = __import__(module_name)
    if __module:
        __function = getattr(__module, function_name)

        if __function:    
            return __function
        else:
            log.error("No function " + function_name + " found inside module " + module_name)
            return None
    else:
        log.error("No module " + module_name + " found")
        return None

def Log2(x):
    return math.log(x, 2)

def FormatFloatNumber(num, i_format = '{:0>5d}', d_format = '{:.2f}' ):
    
    __str = i_format.format(int(num)) 
    __str = __str + d_format.format(num - int(num))[1:]

    return __str

def GetPlatform():
    return sys.platform

def GetOsName():
    return os.name

def GetPlatformSystem():
    return platform.system()

def IsOsLinux():
    return GetPlatformSystem() == "Linux"

def IsOsDos():
    return GetPlatformSystem() == "Windows"

def IsOsMac():
    return GetPlatformSystem() == "Darwin"

def GetNullFile():

    if IsOsDos():
        return "NUL"
    else:
        return "/dev/null"

def CompareFiles(file1, file2):
    return filecmp.cmp(file1, file2)

def AppendFile(file, text):    
    return open(file, "a").write(text + "\n")

def WriteFile(file, text):    
    return open(file, "w").write(text)

def ReadFile(file):    
    AssertFileExists(file)
    return open(file, "r").read()

def GenerateUniqueFileName(filename):

  from hashlib import md5
  from time import localtime

  return "%s_%s" % (md5(str(localtime())).hexdigest(), filename)

def FindInHash(key, hash, default):
    if key not in hash.keys():
        hash.update( { key : copy.deepcopy(default) } )

    return hash[key]

def GetJsonString(object):
    return json.dumps(object)

def WriteJsonFile(filepath, object):

    log.info("Writing JSON file " + filepath)

    json.dump(object, open(filepath, 'w'), indent = 4, )

def ReadJsonString(string):

    log.info("Reading JSON string: " + string)

    return json.loads(string)

def ReadJsonFile(filepath):

    log.info("Reading JSON file " + filepath)

    return ReadJsonString(ReadFile(filepath))

def LoadPythonFile(file_path):
    AssertFileExists(file_path)
    
    if globals is None:
        globals = {}
    globals.update({
        "__file__": file_path,
        "__name__": "__main__",
    })
    with open(file_path, 'rb') as file_path:
        exec(compile(file_path.read(), file_path, 'exec'), globals, locals)    


def Assert(condition, message = None):
    
    if condition == False:        
        if message == None:
            log.fatal("Assert Failed")
        else:
            log.fatal("Assert Failed: " + message)

def GetAbsoluteFilePaths( dir_path, file_names ):

    __file_path_list = []

    for __file_name in file_names:
        __file_path = dir_path + "/" + __file_name
        AssertFileExists(__file_path)

        __file_path_list.append(__file_path)

    return __file_path_list

def GetFileExt(x):
    x = os.path.splitext(x)[1] # Get extension

    return x[1:]

def GetFilePathWithoutExt(x):
    x = os.path.splitext(x)[0] # Remove extension
    return x

def GetFileBaseName(x):
    x = os.path.basename( x ) # Remove complete path and only get file name
    x = os.path.splitext(x)[0] # Remove extension
    return x

def GetDirBaseName(x):
    return os.path.basename( os.path.dirname(x) ) # Remove complete path and only get file name

def GetFileName(x):
    x = os.path.basename( x ) # Remove complete path and only get file name
    return x

def AssertFileExists(file, msg=None):
    if msg is None:
        msg = "File " + str(file) + " does not exist"
    Assert(FileExists(file), msg)

def AssertFileDoesNotExist(file):
    Assert(FileExists(file) == False, "File " + str(file) + " does not exist" )

def AssertDirExists(dir):
    Assert(DirExists(dir), "Directory " + str(dir) + " does not exist" )

def GetFileSize(file):
    return os.path.getsize(file)

def IsEmptyFile(file):
    if GetFileSize(file) == 0:
        return True
    else:
        return False

def RemoveFileIfEmpty(file):
    if IsEmptyFile(file):
        RemoveFile(file)

def RemoveFile(file):

    if FileExists(file):
        os.remove(file)

    log.info( 'RemoveFile ' + file )

def CopyFileSafe(old_file, new_file):
    AssertFileExists(old_file)

    if FileExists(new_file):
        log.fatal("File " + new_file + " already exists. Cannot overwrite it.")

    shutil.copy(old_file, new_file)

    log.info( 'CopyFileSafe ' + old_file + " to " + new_file )   
         
def CopyFile(old_file, new_file):
    AssertFileExists(old_file)

    shutil.copy(old_file, new_file)

    log.info( 'CopyFile ' + old_file + " to " + new_file )    

def MoveFile(old_file, new_file):
    AssertFileExists(old_file)

    log.info( 'MoveFile ' + old_file + " to " + new_file )    

    os.rename( old_file, new_file)

def MoveDir(old_dir, new_dir):
    AssertDirExists(old_dir)

    log.info( 'MoveDir ' + old_dir + " to " + new_dir )    

    os.rename( old_dir, new_dir)

def RemoveDir(dir):

    if os.path.isdir(dir) == True:
        log.info( 'RemoveDir ' + dir )
        shutil.rmtree(dir)

def GetExecutableFilePath(file_path):
    
    if IsOsDos():

        if GetFileExt( file_path ) != "exe":
            return file_path + ".exe"
        else:
            return file_path
    else:
        return file_path

def FileExists(file):
    if file is None or file == "":
        return False

    if os.path.isfile(file):
        return True
    else:
        return False

def DirExists(dir):
    
    if os.path.isdir(dir):
        return True
    else:
        return False

def GetRealPath(x):
    return os.path.realpath(x)

def GetFullPath(file_or_dir):
    if DirExists(file_or_dir):
        file_or_dir = os.path.realpath(file_or_dir)
        if file_or_dir[-1] == '/':
            return file_or_dir
        else:
            return file_or_dir + "/"

    elif FileExists(file_or_dir):
        return os.path.realpath(file_or_dir)

    return file_or_dir

def GetParentDir(dir):
    return GetFullPath( os.path.normpath(os.path.join(dir, "..")) )

def GetCurrentDir():
    return GetFullPath( os.getcwd() )

def ChangeDir(dir, quiet = False):
    
    os.chdir( dir )

    if quiet == False:
        log.info ('ChangeDir ' + dir )

def MakeFreshDir(dir):
    
    if os.path.isdir(dir) == True:
        RemoveDir(dir)

    MakeDir(dir)

def MakeFreshDirRecursive(path):
    
    RemoveDir(path)
    MakeDirRecursive(path)

def MakeDir(dir):
    
    if os.path.isdir(dir) == False:
        os.mkdir(dir)
        
        log.info ('MakeDir ' + dir )

def MakeDirRecursive(path):

    sub_path = os.path.dirname(path)

    if not DirExists(sub_path) and sub_path != "":
        MakeDirRecursive(sub_path)

    if not DirExists(path) and path != "":
        MakeDir(path)

def GetDirName(x):
    x = os.path.basename( normpath(x) ) # Remove complete path and only get file name
    return x

def GetFileListInDir(dir_path, file_ext, recursive = True):
    
    AssertDirExists(dir_path)

    __file_list = []

    if recursive:
        for __sub_dir_path, __dirs, __files in os.walk(dir_path):

            for __file_name in __files:

                __file_path = FormatFilePath( __sub_dir_path + '/' + __file_name )
                __file_ext  = GetFileExt( __file_path )

                if __file_ext.upper() == file_ext.upper():
                    __file_list.append( GetFullPath(__file_path) )
    else:
        __file_list = glob.glob(os.path.join( dir_path, '*.' + file_ext  ))

    return __file_list

def BuildFileList(file_or_folder_list, file_ext):
    
    __file_list = []

    for __file_or_folder in file_or_folder_list:

        if DirExists( __file_or_folder ):
            # Add all files in directory to the project
            __file_list_in_dir = GetFileListInDir( __file_or_folder, file_ext )

            for __file in __file_list_in_dir:
                __file_list.append( __file )

        elif GetFileExt(__file_or_folder).upper() == file_ext.upper():
            __file_list.append( GetFullPath(__file_or_folder) )

    return __file_list

# --- Other functions

def QuietExit(retcode = 0):
    sys.exit(retcode)

def Exit(retcode = 0):
    if retcode != 0:
        log.fatal("Exit with return code: " + str(retcode))
    else:
        QuietExit(0)

def Clip(x, min, max):
    if x > max:
        return max
    elif x < min:
        return min
    else:
        return x

def Sign(x):
    if x > 0:
        return 1
    elif x < 0:
        return -1
    else:
        return 0

def GetFileResolution(filepath):
    input_dir = os.path.dirname(os.path.realpath(filepath))
    input_dir_basename = os.path.basename( FormatDirPath( input_dir ) )

    file_basename = os.path.basename( filepath ) # Remove complete path and only get file name
    file_basename = os.path.splitext(file_basename)[0] # Remove extension
    
    itemslist = file_basename.split("_")

    # Try to get resolution from file name    
    if len(itemslist) > 1:
        resolution = itemslist[-1]

        if resolution.find('x') >= 0 :
            itemslist = resolution.split('x');            

            if len(itemslist) > 1:
                return int(itemslist[0]), int(itemslist[1])

    # Try to get resolution from parent folder name
    if input_dir_basename.find('x') >= 0 :
        itemslist = input_dir_basename.split('x');

        if len(itemslist) > 1:
            return int(itemslist[0]), int(itemslist[1])

    return 3000, 3000 # -- Default resolution

def WriteFolderMd5Sum(input_dir, file_ext, output_file, output_full_paths = False ):

    __md5sum_list = GetFolderMd5Sum( input_dir, file_ext )
    
    __md5_text = ""

    for __file_md5sum in __md5sum_list:

        __md5_text = __md5_text + __file_md5sum['md5sum']

        if output_full_paths:
            __md5_text = __md5_text + " " + __file_md5sum['file_path']
        else:
            __md5_text = __md5_text + " " + __file_md5sum['file_name']

        __md5_text = __md5_text + "\n"

    WriteFile( output_file, __md5_text )

    return __md5sum_list

def GetFolderMd5Sum(input_dir, file_ext ):

    __md5sum_list = []

    for __sub_dir_path, __dirs, __files in os.walk(input_dir):

        for __file_name in __files:

            __file_path = FormatFilePath( __sub_dir_path + '/' + __file_name )

            if GetFileExt(__file_path) == file_ext.lower() or GetFileExt(__file_path) == file_ext.upper():

                __md5sum_list.append( { 'file_path' : __file_path, 'file_name' : __file_name, 'md5sum' : GetFileMd5Sum(__file_path) } )

    return __md5sum_list

def GetFileMd5Sum(file_path, block_size = 256*128 ):
    md5 = hashlib.md5()

    with open(file_path,'rb') as f: 
        for chunk in iter(lambda: f.read(block_size), b''): 
             md5.update(chunk)

    return md5.hexdigest()

def FormatFilePath(file_path):
    file_path = file_path.rstrip('\\') # Remove \\ at the end
    file_path = file_path.rstrip('/')  # Remove / at the end
    
    file_path = file_path.replace('\\','/') # Replace backslash with forward slash

    # Convert relative path to absolute path
    file_path = os.path.abspath(file_path)

    file_path = file_path.replace('\\','/') # Replace backslash with forward slash

    # -- Make sure file_path exists before returning correct path
    AssertFileExists(file_path)

    return file_path

def GetAllSubDirs(dir_path):
    return [GetFullPath(dir_path + o) for o in os.listdir(dir_path) if os.path.isdir(os.path.join(dir_path,o))]

def FindAllFiles(dir_path, file_extension):    
    res = []
    for file_name in os.listdir(dir_path):
        file_path = GetFullPath(dir_path) + file_name
        if FileExists(file_path) and GetFileExt(file_path).upper() == file_extension.upper():
            res.append(file_path)
    return res
    
def FormatDirPath(dir_path, directory_must_exist = True):
    
    dir_path = dir_path.rstrip('\\') # Remove \\ at the end
    dir_path = dir_path.rstrip('/')  # Remove / at the end
    
    dir_path = dir_path.replace('\\','/') # Replace backslash with forward slash

    dir_path = os.path.abspath(dir_path)

    dir_path = dir_path.replace('\\','/') # Replace backslash with forward slash

    if directory_must_exist:
        # -- Make sure directory exists before returning correct path
        AssertDirExists(dir_path)

    return dir_path

def IsNumpyArray(x):
    return operator.isNumberType(x)

def IsInsidePackage():
    # Always assuming that root git dir is two levels over common directory
    git_dir = GetParentDir(__file__) + "/../../" + ".git"
    return DirExists(git_dir) == False

def CheckForCommands( command_list, verbsoe = True ):

    for __command in command_list:

        if GetFullPathOfCommand(__command) == None:
            
            if verbsoe:
                log.fatal("Command " + __command + " not found. Check if these apps are installed: " + str(command_list))

            return False

    return True

def GetFullPathOfCommand(command):

    __command = ""
    if IsOsDos():
        __command = "where.exe " + command
    else:
        __command = "which " + command

    __output = ExecuteCommand(__command, True)

    if __output["returncode"]:
        return None
    else:
        __path =  __output['stdout'].strip()
        
        log.info("Found " + command + ": " + __path)

        return FormatFilePath(__path)

def IsMyFunction(function_name):
    if (not function_name.startswith('_')) and inspect.isfunction(globals()[function_name]):
        return True
    else:
        return False

def GetFunctionArguments(function_name):

    if not inspect.getargspec(globals()[function_name]).args:
        return "()"
    else:
        __arg_info = inspect.getargspec(globals()[function_name])

        if __arg_info.defaults:

            __defaults_len = len(__arg_info.defaults)
            for __index in range(__defaults_len):
                __arg_list_index = len(__arg_info.args) - __index - 1
                __arg_info.args[__arg_list_index] = str(__arg_info.args[__arg_list_index]) + " = " + str(__arg_info.defaults[__defaults_len - __index - 1])

        return str(__arg_info.args)

def PrintFunctions(template = None):
    
    if template:
        print("Printing all available functions with word " + template)
    else:
        print("Printing all available functions")

    __count = 0
    for __function_name in globals().keys():
    
        if IsMyFunction(__function_name):

            if (template == None) or (template != None and __function_name.find(template) >= 0):            
                print(__function_name + GetFunctionArguments(__function_name))
                __count = __count + 1

    print(str(__count) + " Functions Found")

def ConvertStringArgumentToObject(argument):

    if argument == "None":
        return None

    if argument == "True":
        return True

    if argument == "False":
        return False

    try:
        return float(argument)
    except:
        pass

    try:        
        return int(argument)
    except:
        pass

    return argument

def GetModelDirPath(model_dir_path, source_dir_path):

    if DirExists(model_dir_path):
        return FormatDirPath(model_dir_path, True)

    model_dir_path = FormatDirPath(source_dir_path, False) + "/" + "models"
    if DirExists(model_dir_path):
        return FormatDirPath(model_dir_path, True)

    model_dir_path = os.environ.get('ROLL_MODELS_DIR')
    if model_dir_path is not None:
        if DirExists(model_dir_path):
            return FormatDirPath(model_dir_path, True)

    log.fatal("Could not find model directory - please make sure to specify model_dir_path")
    return ""

def GetFontsDirPath(fonts_dir_path, source_dir_path):

    if DirExists(fonts_dir_path):
        return FormatDirPath(fonts_dir_path, True)

    fonts_dir_path = FormatDirPath(source_dir_path, False) + "/" + "fonts"
    if DirExists(fonts_dir_path):
        return FormatDirPath(fonts_dir_path, True)

    fonts_dir_path = os.environ.get('ROLL_FONTS_DIR')
    if fonts_dir_path is not None:
        if DirExists(fonts_dir_path):
            return FormatDirPath(fonts_dir_path, True)

    log.fatal("Could not find fonts directory - please make sure to specify fonts_dir_path")
    return ""