import json
from copy import deepcopy
from pathlib import Path
from os import makedirs
from deezer import TrackFormats
import deemix.utils.localpaths as localpaths

class OverwriteOption():
    """Should the lib overwrite files?"""
    OVERWRITE = 'y' # Yes, overwrite the file
    DONT_OVERWRITE = 'n' # No, don't overwrite the file
    DONT_CHECK_EXT = 'e' # No, and don't check for extensions
    KEEP_BOTH = 'b' # No, and keep both files
    ONLY_TAGS = 't' # Overwrite only the tags

class FeaturesOption():
    """What should I do with featured artists?"""
    NO_CHANGE = "0" # Do nothing
    REMOVE_TITLE = "1" # Remove from track title
    REMOVE_TITLE_ALBUM = "3" # Remove from track title and album title
    MOVE_TITLE = "2" # Move to track title

DEFAULTS = {
  "albumNameTemplate": "%artist% - %album%",
  "albumTracknameTemplate": "%tracknumber% - %title%",
  "albumVariousArtists": True,
  "artistCasing": "nothing",
  "artistImageTemplate": "folder",
  "artistNameTemplate": "%artist%",
  "coverImageTemplate": "cover",
  "createAlbumFolder": True,
  "createArtistFolder": False,
  "createCDFolder": True,
  "createM3U8File": False,
  "createPlaylistFolder": True,
  "createSingleFolder": False,
  "createStructurePlaylist": False,
  "dateFormat": "Y-M-D",
  "downloadLocation": str(localpaths.getMusicFolder()),
  "embeddedArtworkPNG": False,
  "embeddedArtworkSize": 800,
  "executeCommand": "",
  "fallbackBitrate": False,
  "fallbackISRC": False,
  "fallbackSearch": False,
  "featuredToTitle": FeaturesOption.NO_CHANGE,
  "feelingLucky": False,
  "illegalCharacterReplacer": "_",
  "jpegImageQuality": 90,
  "localArtworkFormat": "jpg",
  "localArtworkSize": 1400,
  "logErrors": True,
  "logSearched": False,
  "maxBitrate": TrackFormats.MP3_320,
  "overwriteFile": OverwriteOption.DONT_OVERWRITE,
  "paddingSize": "0",
  "padTracks": True,
  "playlistFilenameTemplate": "playlist",
  "playlistNameTemplate": "%playlist%",
  "playlistTracknameTemplate": "%position% - %artist% - %title%",
  "queueConcurrency": 3,
  "removeAlbumVersion": False,
  "removeDuplicateArtists": True,
  "saveArtwork": True,
  "saveArtworkArtist": False,
  "syncedLyrics": False,
  "tags": {
    "album": True,
    "albumArtist": True,
    "artist": True,
    "artists": True,
    "barcode": True,
    "bpm": True,
    "composer": False,
    "copyright": False,
    "cover": True,
    "coverDescriptionUTF8": False,
    "date": True,
    "discNumber": True,
    "discTotal": False,
    "explicit": False,
    "genre": True,
    "involvedPeople": False,
    "isrc": True,
    "label": True,
    "length": True,
    "lyrics": False,
    "multiArtistSeparator": "default",
    "rating": False,
    "replayGain": False,
    "saveID3v1": True,
    "savePlaylistAsCompilation": False,
    "singleAlbumArtist": False,
    "source": False,
    "syncedLyrics": False,
    "title": True,
    "trackNumber": True,
    "trackTotal": False,
    "useNullSeparator": False,
    "year": True,
  },
  "titleCasing": "nothing",
  "tracknameTemplate": "%artist% - %title%",
}

def save(settings, configFolder=None):
    configFolder = Path(configFolder or localpaths.getConfigFolder())
    makedirs(configFolder, exist_ok=True) # Create config folder if it doesn't exsist

    with open(configFolder / 'config.json', 'w', encoding="utf-8") as configFile:
        json.dump(settings, configFile, indent=2)

def load(configFolder=None):
    configFolder = Path(configFolder or localpaths.getConfigFolder())
    makedirs(configFolder, exist_ok=True) # Create config folder if it doesn't exsist
    if not (configFolder / 'config.json').is_file(): save(DEFAULTS, configFolder) # Create config file if it doesn't exsist

    # Read config file
    with open(configFolder / 'config.json', 'r', encoding="utf-8") as configFile:
        try:
            settings = json.load(configFile)
        except json.decoder.JSONDecodeError:
            save(DEFAULTS, configFolder)
            settings = deepcopy(DEFAULTS)
        except Exception:
            settings = deepcopy(DEFAULTS)

    if check(settings) > 0:
        try:
            save(settings, configFolder) # Check the settings and save them if something changed
        except:
            print(f"Error saving config file {configFile.name}, continuing without saving.") 
    return settings

def check(settings):
    changes = 0
    for i_set in DEFAULTS:
        if not i_set in settings or not type(settings[i_set] is type(DEFAULTS[i_set])):
            settings[i_set] = DEFAULTS[i_set]
            changes += 1
    for i_set in DEFAULTS['tags']:
        if not i_set in settings['tags'] or not isinstance(settings['tags'][i_set], type(DEFAULTS['tags'][i_set])):
            settings['tags'][i_set] = DEFAULTS['tags'][i_set]
            changes += 1
    if settings['downloadLocation'] == "":
        settings['downloadLocation'] = DEFAULTS['downloadLocation']
        changes += 1
    for template in ['tracknameTemplate', 'albumTracknameTemplate', 'playlistTracknameTemplate', 'playlistNameTemplate', 'artistNameTemplate', 'albumNameTemplate', 'playlistFilenameTemplate', 'coverImageTemplate', 'artistImageTemplate', 'paddingSize']:
        if settings[template] == "":
            settings[template] = DEFAULTS[template]
            changes += 1
    return changes