##################################################################################################
# Copyright (c) 2012 Brett Dixon
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in 
# the Software without restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the 
# Software, and to permit persons to whom the Software is furnished to do so, 
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all 
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
##################################################################################################


import json
import Queue
import subprocess
import re

from django.db import models
from django.contrib.auth.models import User
from django.core.exceptions import ImproperlyConfigured
from django.conf import settings

from videoThread import VideoThread, parseInfo

from path import path as Path
from PIL import Image as pilImage

FROG_IMAGE_SIZE_CAP = getattr(settings, 'FROG_IMAGE_SIZE_CAP', 5120)
FROG_IMAGE_SMALL_SIZE = getattr(settings, 'FROG_IMAGE_SMALL_SIZE', 600)
FROG_THUMB_SIZE = getattr(settings, 'FROG_THUMB_SIZE', 256)
FROG_UNIQUE_ID = getattr(settings, 'FROG_UNIQUE_ID', None)
FROG_PATH = getattr(settings, 'FROG_PATH', None)
try:
    FROG_SITE_URL = getattr(settings, 'FROG_SITE_URL')
except AttributeError:
    raise ImproperlyConfigured, 'FROG_SITE_URL is required'

gQueue = Queue.Queue()
gVideoThread = VideoThread(gQueue)
gVideoThread.start()

DefaultPrefs = {
    'backgroundColor': '000000',
    'tileCount': 6,
    'batchSize': 300,
    'includeImage': True,
    'includeVideo': True,
}

ROOT = Path(settings.MEDIA_ROOT.replace('\\', '/'))


class Tag(models.Model):
    name = models.CharField(max_length=255, unique=True)
    parent = models.ForeignKey('self', blank=True, null=True)
    artist = models.BooleanField(default=False)

    def __unicode__(self):
        return self.name

    def json(self):
        obj = {
            'id': self.id,
            'name': self.name,
        }

        return obj

    def count(self):
        i = self.image_set.all().count()
        v = self.video_set.all().count()

        return i + v


class Piece(models.Model):
    AssetType = 0
    title = models.CharField(max_length=255, blank=True)
    author = models.ForeignKey(User)
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now_add=True, auto_now=True)
    thumbnail = models.ImageField(upload_to='%Y/%m/%d', max_length=255, blank=True, null=True)
    width = models.IntegerField(default=0)
    height = models.IntegerField(default=0)
    foreign_path = models.TextField(blank=True)
    unique_id = models.CharField(max_length=255, blank=True)
    guid = models.CharField(max_length=16, blank=True)
    tags = models.ManyToManyField(Tag, blank=True)
    deleted = models.BooleanField(default=False)
    hash = models.CharField(max_length=40, blank=True)
    comment_count = models.IntegerField(default=0)

    class Meta:
        abstract = True
        ordering = ["-created", "-id"]

    def __unicode__(self):
        return self.title

    def thumbnail_tag(self):
        if self.thumbnail:
            if self.width / self.height > 1:
                return u'<img src="%s" width="256" />' % self.thumbnail.url
            else:
                return u'<img src="%s" height="256" />' % self.thumbnail.url

        return ''
    thumbnail_tag.allow_tags = True
    thumbnail_tag.short_description = 'Image'

    @staticmethod
    def getUniqueID(path, user):
        if FROG_UNIQUE_ID:
            modparts = FROG_UNIQUE_ID.split('.')
            func = modparts.pop()
            mod = '.'.join(modparts)
            imported = __import__(mod, globals(), locals(), [func])
            uid = getattr(imported, func)(path, user)
        else:
            path = Path(path)
            username = 'Anonymous' if user.is_anonymous() else user.username
            uid = '%s_%s' % (username, path.name)

        return uid

    def getGuid(self):
        return Guid(self.id, self.AssetType)

    def export(self):
        pass

    def getPath(self):
        guid = self.getGuid()
        
        return ROOT / guid.guid[-2:] / guid.guid

    def getFiles(self):
        path = self.getPath()
        allfiles = path.files()

        thumb = Path(self.thumbnail.name).name.replace(self.hash, self.title)
        source = Path(self.source.name).name.replace(self.hash, self.title)
        files = {}
        files[thumb] = ROOT + '/' + self.thumbnail.name
        files[source] = ROOT + '/' + self.source.name
        
        for file_ in allfiles:
            if not re.findall('([0-9A-Za-z]{40}\.\w+)', file_):
                files[file_.name] = file_

        return files

    def serialize(self):
        return json.dumps(self.json())

    def tagArtist(self, tag=None):
        ## -- First remove any artist tags
        for n in self.tags.filter(artist=True):
            self.tags.remove(n)
        self.save()
        if tag is None:
            tag = Tag.objects.get_or_create(name=self.author.first_name.lower() + ' ' + self.author.last_name.lower(), defaults={'artist': True})[0]
        
        self.tags.add(tag)
        self.save()

    def json(self):
        obj = {
            'id': self.id,
            'title': self.title,
            'author': {
                'first': self.author.first_name,
                'last': self.author.last_name,
                'username': self.author.username,
                'email': self.author.email,
            },
            'created': self.created.isoformat(),
            'modified': self.modified.isoformat(),
            'width': self.width,
            'height': self.height,
            'guid': self.guid,
            'deleted': self.deleted,
            'hash': self.hash,
            'tags': [tag.json() for tag in self.tags.all()],
            'thumbnail': self.thumbnail.url if self.thumbnail else '',
            'comment_count': self.comment_count,
        }

        return obj


class Image(Piece):
    AssetType = 1
    source = models.ImageField(upload_to='%Y/%m/%d', width_field='width', height_field='height', max_length=255, blank=True, null=True)
    image = models.ImageField(upload_to='%Y/%m/%d', max_length=255, blank=True, null=True)
    small = models.ImageField(upload_to='%Y/%m/%d', max_length=255, blank=True, null=True)

    def export(self, hashVal, hashPath, tags=None, galleries=None):
        '''
        The export function needs to:
        - Move source image to asset folder
        - Rename to guid.ext
        - Save thumbnail, small, and image versions
        '''
        
        self.source = hashPath.replace('\\', '/').replace(ROOT, '')
        galleries = galleries or []
        tags = tags or []

        imagefile = Path(ROOT + self.source.name)
        
        workImage = pilImage.open(imagefile)

        if imagefile.ext in ('.tif', '.tiff'):
            png = imagefile.parent / imagefile.namebase + '.png'
            workImage.save(png)
            workImage = pilImage.open(png)
            imagefile.move(imagefile.replace(self.hash, self.title))
            self.source = png.replace(ROOT, '')

        formats = [
            ('image', FROG_IMAGE_SIZE_CAP),
            ('small', FROG_IMAGE_SMALL_SIZE),
            ('thumbnail', FROG_THUMB_SIZE),
        ]
        for i,n in enumerate(formats):
            if workImage.size[0] > n[1] or workImage.size[1] > n[1]:
                workImage.thumbnail((n[1], n[1]), pilImage.ANTIALIAS)
                setattr(self, n[0], self.source.name.replace(hashVal, '_' * i + hashVal))
                workImage.save(ROOT + getattr(self, n[0]).name)
            else:
                setattr(self, n[0], self.source)

        for gal in galleries:
            g = Gallery.objects.get(pk=int(gal))
            g.images.add(self)

        self.tagArtist()

        for tagName in tags:
            tag = Tag.objects.get_or_create(name=tagName)[0]
            self.tags.add(tag)

        if not self.guid:
            self.guid = self.getGuid().guid
        self.save()

    def json(self):
        obj = super(Image, self).json()
        obj['source'] = self.source.url if self.source else ''
        obj['image'] = self.image.url if self.image else ''
        obj['small'] = self.small.url if self.small else ''

        return obj


class Video(Piece):
    AssetType = 2
    source = models.FileField(upload_to='%Y/%m/%d', max_length=255, blank=True, null=True)
    video = models.FileField(upload_to='%Y/%m/%d', max_length=255, blank=True, null=True)
    video_thumbnail = models.FileField(upload_to='%Y/%m/%d', max_length=255, blank=True, null=True)

    def export(self, hashVal, hashPath, tags=None, galleries=None):
        '''
        The export function needs to:
        - Move source image to asset folder
        - Rename to guid.ext
        - Save thumbnail, video_thumbnail, and MP4 versions.  If the source is already h264, then only transcode the thumbnails
        '''

        self.source = hashPath.replace('\\', '/').replace(ROOT, '')
        galleries = galleries or []
        tags = tags or []

        ## -- Get info
        cmd = '%s -i "%s"' % (settings.FFMPEG, hashPath)
        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
        infoString = proc.stdout.readlines()
        videodata = parseInfo(infoString)
        
        self.width = int(videodata['video'][0]['width'])
        self.height = int(videodata['video'][0]['height'])

        ## -- Save thumbnail and put into queue
        thumbnail = hashPath.parent / ("_%s.jpg" % hashVal)
        cmd = '%s -i "%s" -ss 1 -vframes 1 "%s"' % (
            settings.FFMPEG,
            hashPath,
            thumbnail
        )
        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
        proc.communicate()

        self.thumbnail = thumbnail.replace('\\', '/').replace(ROOT, '')

        for gal in galleries:
            g = Gallery.objects.get(pk=int(gal))
            g.videos.add(self)

        artistTag = Tag.objects.get_or_create(name=self.author.first_name + ' ' + self.author.last_name)[0]
        self.tags.add(artistTag)

        for tagName in tags:
            tag = Tag.objects.get_or_create(name=tagName)[0]
            self.tags.add(tag)

        if not self.guid:
            self.guid = self.getGuid().guid

        ## -- Set the temp video while processing
        self.video = 'frog/i/queued.mp4'
        queuedvideo = VideoQueue.objects.get_or_create(video=self)[0]
        queuedvideo.save()

        self.save()

        gQueue.put(self)

    def json(self):
        obj = super(Video, self).json()
        obj['source'] = self.source.url if self.source else ''
        obj['video'] = self.video.url if self.video else ''
        obj['video_thumbnail'] = self.video_thumbnail.url if self.video_thumbnail else ''

        return obj


class VideoQueue(models.Model):
    QUEUED, PROCESSING, COMPLETED, ERROR = (0, 1, 2, 3)
    STATUS = (
        (QUEUED, 'Queued'),
        (PROCESSING, 'Processing'),
        (COMPLETED, 'Completed'),
        (ERROR, 'Error'),
    )

    video = models.OneToOneField(Video, related_name='queue')
    status = models.SmallIntegerField(default=QUEUED, choices=STATUS)
    message = models.TextField(blank=True, null=True)

    def setStatus(self, status):
        self.status = status
        self.save()

    def setMessage(self, message):
        self.message = message
        self.save()


class Gallery(models.Model):
    PUBLIC, PRIVATE, PERSONAL = (0, 1, 2)
    SECURITY_LEVEL = (
        (PUBLIC, 'Public'),
        (PRIVATE, 'Private'),
        (PERSONAL, 'Personal'),
    )
    title = models.CharField(max_length=128)
    images = models.ManyToManyField(Image, blank=True, null=True)
    videos = models.ManyToManyField(Video, blank=True, null=True)
    security = models.SmallIntegerField(default=PUBLIC, choices=SECURITY_LEVEL)
    owner = models.ForeignKey(User, default=1)
    description = models.TextField(default="", blank=True)
    uploads = models.BooleanField(default=True)
    parent = models.ForeignKey('self', null=True, blank=True)

    class Meta:
        verbose_name_plural = "Galleries"

    def __unicode__(self):
        return self.title

    def json(self):
        obj = {
            'id': self.id,
            'title': self.title,
            'security': self.security,
            'image_count': self.images.count(),
            'video_count': self.videos.count(),
            'owner': {'id': self.owner.id, 'name': self.owner.get_full_name()},
            'description': self.description,
            'uploads': self.uploads,
            'iconCls': 'gallery-nav',
            'values': [g.json() for g in self.gallery_set.all()],
            'parent': self.parent.id if self.parent else None,
        }

        return obj


class UserPref(models.Model):
    user = models.ForeignKey(User, related_name='frog_prefs')
    data = models.TextField(default='{}')

    def json(self):
        return json.loads(self.data)

    def setKey(self, key, val):
        data = json.loads(self.data)
        keys = key.split('.')
        keys.reverse()
        name = data
        while keys:
            root = keys.pop()
            name.setdefault(root, {})
            if len(keys) == 0:
                name[root] = val
            else:
                name = name[root]
        self.data = json.dumps(data)
        
        self.save()


class Guid(object):
    AssetTypes = {
        1: 1152921504606846976L,
        2: 2305843009213693952L,
    }
    def __init__(self, obj_id, type_id=1):
        if isinstance(obj_id, str):
            self.int = int(obj_id, 16)
            self.guid = obj_id[2:] if obj_id[1] == 'x' else obj_id
        elif isinstance(obj_id, long) or isinstance(obj_id, int):
            self.int = self.AssetTypes[type_id] + obj_id
            self.guid = hex(self.int)[2:-1]
        else:
            self.int = 0
            self.guid = ''


class RSSStorage(models.Model):
    date = models.DateTimeField(auto_now_add=True)
    interval = models.CharField(max_length=6)
    data = models.TextField()
    gallery = models.ForeignKey(Gallery, related_name='rss_storage')
