from django.db import models
from pygments.lexers import get_all_lexers
from pygments.styles import get_all_styles

LEXERS = [item for item in get_all_lexers() if item[1]]
LANGUAGE_CHOICES = sorted([(item[1][0], item[0]) for item in LEXERS])
STYLE_CHOICES = sorted((item, item) for item in get_all_styles())


class Snippet(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    owner = models.ForeignKey('auth.User', related_name='snippets', on_delete=models.CASCADE)
    title = models.CharField(max_length=100, blank=True, default='')
    code = models.TextField(help_text="code model help text")
    linenos = models.BooleanField(default=False)
    language = models.CharField(choices=LANGUAGE_CHOICES, default='python', max_length=100)
    style = models.CharField(choices=STYLE_CHOICES, default='friendly', max_length=100)

    class Meta:
        ordering = ('created',)


class SnippetViewer(models.Model):
    snippet = models.ForeignKey(Snippet, on_delete=models.CASCADE, related_name='viewers')
    viewer = models.ForeignKey('auth.User', related_name='snippet_views', on_delete=models.CASCADE)