# Copyright 2020 (c) Anna Schumaker.
import datetime
import mutagen
import re

class Track:
    def __init__(self, trackid, filepath):
        self.trackid = trackid
        self.filepath = filepath
        self.tags = { "lastplayed" : None, "playcount" : 0 }

        f = mutagen.File(filepath)
        self.tags["album"] = f.get("album", ["Unknown Album"])[0]
        self.tags["artist"] = f.get("artist", ["Unknown Artist"])[0]
        self.tags["artist"] = f.get("albumartist", [self.tags["artist"]])[0]
        self.tags["discnumber"] = int(f.get("discnumber", [1])[0])
        self.tags["genre"] = f.get("genre", [ "" ])[0]
        self.tags["genre"] = [ g.strip() for g in re.split(",|;|/|:", self.tags["genre"]) ]
        self.tags["length"] = int(f.info.length)
        self.tags["title"] = f.get("title", [""])[0]
        self.tags["tracknumber"] = int(f.get("tracknumber", [0])[0])
        self.tags["year"] = f.get("date", ["0"])[0]
        self.tags["year"] = f.get("originalyear", [self.tags["year"]])[0]
        self.tags["year"] = int(re.match("\d+", self.tags["year"]).group(0))

    def __getitem__(self, item):
        tag = self.tags.get(item, None)
        if item == "length":
            (m, s) = divmod(tag, 60)
            return f"{m}:{s:02}"
        elif item in ("discnumber", "tracknumber"):
            return f"{tag:02}"
        elif item == "lastplayed":
            return "Never" if tag == None else str(tag)
        elif item == "genre":
            return ", ".join(self.tags["genre"])
        return None if tag == None else str(tag)

    def genres(self):
        for g in self.tags["genre"]:
            yield g

    def played(self):
        self.tags["playcount"] += 1
        self.tags["lastplayed"] = datetime.date.today()