import os
from django.conf import settings
from django.db import models
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User

OS_NAMES = (
        ("aix", "AIX"),
        ("beos", "BeOS"),
        ("debian", "Debian Linux"),
        ("dos", "DOS"),
        ("freebsd", "FreeBSD"),
        ("hpux", "HP/UX"),
        ("mac", "Mac System x."),
        ("macos", "MacOS X"),
        ("mandrake", "Mandrake Linux"),
        ("netbsd", "NetBSD"),
        ("openbsd", "OpenBSD"),
        ("qnx", "QNX"),
        ("redhat", "RedHat Linux"),
        ("solaris", "SUN Solaris"),
        ("suse", "SuSE Linux"),
        ("yellowdog", "Yellow Dog Linux"),
)

ARCHITECTURES = (
    ("alpha", "Alpha"),
    ("hppa", "HPPA"),
    ("ix86", "Intel"),
    ("powerpc", "PowerPC"),
    ("sparc", "Sparc"),
    ("ultrasparc", "UltraSparc"),
)

UPLOAD_TO = getattr(settings,
    "DJANGOPYPI_RELEASE_UPLOAD_TO", 'dist')


class Channel(models.Model):
    name = models.CharField(max_length=255, unique=True)

    class Meta:
        verbose_name = _(u"channel")
        verbose_name_plural = _(u"channels")

    def __unicode__(self):
        return self.name

    @models.permalink
    def get_absolute_url(self):
        return ('djangopypi-channel_show_dists', (), {'channel': self.name})


class Classifier(models.Model):
    name = models.CharField(max_length=255, unique=True)

    class Meta:
        verbose_name = _(u"classifier")
        verbose_name_plural = _(u"classifiers")

    def __unicode__(self):
        return self.name


class Project(models.Model):
    name = models.CharField(max_length=255, unique=True)
    license = models.TextField(blank=True)
    metadata_version = models.CharField(max_length=64, default=1.0)
    author = models.CharField(max_length=128, blank=True)
    home_page = models.URLField(verify_exists=False, blank=True, null=True)
    download_url = models.CharField(max_length=200, blank=True, null=True)
    summary = models.TextField(blank=True)
    description = models.TextField(blank=True)
    author_email = models.CharField(max_length=255, blank=True)
    classifiers = models.ManyToManyField(Classifier)
    owner = models.ForeignKey(User, related_name="projects")
    updated = models.DateTimeField(auto_now=True)

    class Meta:
        verbose_name = _(u"project")
        verbose_name_plural = _(u"projects")

    def __unicode__(self):
        return self.name

    @models.permalink
    def get_absolute_url(self):
        return ('djangopypi-show_links', (), {'dist_name': self.name})

    @models.permalink
    def get_pypi_absolute_url(self):
        return ('djangopypi-pypi_show_links', (), {'dist_name': self.name})

    def get_release(self, version):
        """Return the release object for version, or None"""
        try:
            return self.releases.get(version=version)
        except Release.DoesNotExist:
            return None


class Release(models.Model):
    version = models.CharField(max_length=32)
    distribution = models.FileField(upload_to=UPLOAD_TO)
    md5_digest = models.CharField(max_length=255, blank=True)
    platform = models.CharField(max_length=128, blank=True)
    signature = models.CharField(max_length=128, blank=True)
    filetype = models.CharField(max_length=255, blank=True)
    pyversion = models.CharField(max_length=32, blank=True)
    project = models.ForeignKey(Project, related_name="releases")
    upload_time = models.DateTimeField(auto_now=True)
    channel = models.ForeignKey(Channel, related_name="channels",
                                blank=True, null=True)

    class Meta:
        verbose_name = _(u"release")
        verbose_name_plural = _(u"releases")
        unique_together = ("project", "version", "platform", "distribution", "pyversion")

    def __unicode__(self):
        return u"%s (%s)" % (self.release_name, self.platform)

    @property
    def type(self):
        dist_file_types = {
            'sdist':'Source',
            'bdist_dumb':'"dumb" binary',
            'bdist_rpm':'RPM',
            'bdist_wininst':'MS Windows installer',
            'bdist_egg':'Python Egg',
            'bdist_dmg':'OS X Disk Image'}
        return dist_file_types.get(self.filetype, self.filetype)

    @property
    def filename(self):
        return os.path.basename(self.distribution.name)

    @property
    def release_name(self):
        return u"%s-%s" % (self.project.name, self.version)

    @property
    def path(self):
        return self.distribution.name

    @models.permalink
    def get_absolute_url(self):
        return ('djangopypi-show_version', (), {'dist_name': self.project, 'version': self.version})

    def get_dl_url(self):
        return "%s#md5=%s" % (self.distribution.url, self.md5_digest)