import json
import os

import qt_ui.uiconstants as CONST

global __theme_index

THEME_PREFERENCES_FILE_PATH = "liberation_theme.json"

DEFAULT_THEME_INDEX = 1


def init():
    global __theme_index

    __theme_index = DEFAULT_THEME_INDEX
    print("init setting theme index to " + str(__theme_index))

    if os.path.isfile(THEME_PREFERENCES_FILE_PATH):
        try:
            with(open(THEME_PREFERENCES_FILE_PATH)) as prefs:
                pref_data = json.loads(prefs.read())
                __theme_index = pref_data["theme_index"]
                print(__theme_index)
                set_theme_index(__theme_index)
                save_theme_config()
                print("file setting theme index to " + str(__theme_index))
        except:
            # is this necessary?
            set_theme_index(DEFAULT_THEME_INDEX)
            print("except setting theme index to " + str(__theme_index))
    else:
        # is this necessary?
        set_theme_index(DEFAULT_THEME_INDEX)
        print("else setting theme index to " + str(__theme_index))


# set theme index then use save_theme_config to save to file
def set_theme_index(x):
    global __theme_index
    __theme_index = x


# get theme index to reference other theme properties(themeName, themeFile, themeIcons)
def get_theme_index():
    global __theme_index
    return __theme_index


# get theme name based on current index
def get_theme_name():
    theme_name = CONST.THEMES[get_theme_index()]['themeName']
    return theme_name


# get theme icon sub-folder name based on current index
def get_theme_icons():
    theme_icons = CONST.THEMES[get_theme_index()]['themeIcons']
    return str(theme_icons)


# get theme stylesheet css based on current index
def get_theme_css_file():
    theme_file = CONST.THEMES[get_theme_index()]['themeFile']
    return str(theme_file)


# save current theme index to json file
def save_theme_config():
    pref_data = {
        "theme_index": get_theme_index()
    }
    with(open(THEME_PREFERENCES_FILE_PATH, "w")) as prefs:
        prefs.write(json.dumps(pref_data))