import os
import helper.console as console

class SettingEntry:
    def __init__(self, name, env_name=None, default=None, namespace=None, type=str):
        self.name = name
        self.environment = env_name
        self.default = default
        self.value = default
        self.namespace = namespace
        self.read_from_env = False
        self.type = type

        if os.getenv(self.environment) is not None:
            self.read_from_env = True
            self.set(os.getenv(self.environment))

    def __str__(self):
        return '{} => {}'.format(self.name, self.value)

    def __eq__(self, other):
        return self.name == other

    def read_config(self, config):
        if self.namespace in config and self.name in config[self.namespace] and not self.read_from_env:
            self.set(config[self.namespace][self.name])

    def set(self, value):
        self.value = self.type(value)

    def get(self):
        return self.type(self.value)

class Settings:
    # Directory to permanently save the file (ENV: MD_SAVEDIR)
    SaveDir = SettingEntry('saveDir', 'MD_SAVEDIR', '~/Downloads', 'music-downloader', os.path.expanduser)

    # Directory to temporary download the file (ENV: MD_TMP)
    tmpDir = SettingEntry('tmpDir', 'MD_TMP', '~/tmp', 'music-downloader', os.path.expanduser)

    # Minimal debug level (ENV: MD_LOGGING)
    Debuglvl = SettingEntry('debuglvl', 'MD_LOGGING', 0, 'music-downloader', int)

    # Minimal bitrate to auto download the file (ENV: MD_QUALITY)
    MinQuality = SettingEntry('minQuality', 'MD_QUALITY', 300, 'music-downloader', int)

    #Format for downloaded file ID3 comment
    CommentFormat = SettingEntry('saveDir', 'MD_SAVEDIR', '~/Downloads', 'music-downloader')

    @staticmethod
    def import_config(config):
        namespace = 'music-downloader'
        if namespace in config:
            if 'saveDir' in config[namespace]:
                Settings.SaveDir = config[namespace]['saveDir']
            if 'tmpDir' in config[namespace]:
                Settings.tmpDir = config[namespace]['tmpDir']
            if 'debuglvl' in config[namespace]:
                Settings.Debuglvl = config[namespace]['debuglvl']
            if 'minQuality' in config[namespace]:
                Settings.MinQuality = config[namespace]['minQuality']
            if 'commentFormat' in config[namespace]:
                Settings.CommentFormat = config[namespace]['commentFormat']

        if os.getenv('MD_SAVEDIR') is not None:
            Settings.SaveDir = os.getenv('MD_SAVEDIR')
        if os.getenv('MD_TMP') is not None:
            Settings.SaveDir = os.getenv('MD_TMP')
        if os.getenv('MD_LOGGING') is not None:
            Settings.SaveDir = os.getenv('MD_LOGGING')
        if os.getenv('MD_QUALITY') is not None:
            Settings.SaveDir = os.getenv('MD_QUALITY')

        Settings.SaveDir = os.path.expanduser(Settings.SaveDir)
        Settings.tmpDir = os.path.expanduser(Settings.tmpDir)
        Settings.Debuglvl = int(Settings.Debuglvl)