from django.db import models
from django.conf import settings


class Song(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, blank=True, null=True, db_index=True)
    artist = models.CharField(max_length=200, db_index=True, help_text="track artist")
    title = models.CharField(max_length=200, db_index=True, help_text="track title")
    hash = models.CharField(max_length=64, help_text="track file's SHA256 hash")
    duration = models.IntegerField(help_text="track duration in seconds")
    rg_gain = models.DecimalField(
        max_digits=9, decimal_places=6, blank=True, null=True, help_text="replaygain gain level"
    )
    rg_peak = models.DecimalField(
        max_digits=9, decimal_places=6, blank=True, null=True, help_text="replaygain peak level"
    )
    old_id = models.TextField(blank=True, null=True, default=None)
    deleted = models.BooleanField(
        verbose_name="unlisted", default=False, db_index=True, help_text="hide this song from the search listings"
    )

    def report(self, user, note):
        report_note = ReportNote(song=self, user=user, note=note)
        report_note.save()

    def __str__(self):
        return self.artist + " - " + self.title


class ReportNote(models.Model):
    song = models.ForeignKey(Song, on_delete=models.CASCADE, blank=False, null=False, db_index=True)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, blank=True, null=True, db_index=True)
    note = models.TextField(verbose_name="reason", blank=True, help_text="reason for edit request")

    def __str__(self):
        return "{song.artist} - {song.title}: '{note}'".format(song=self.song, note=self.note)