# -*- coding: utf-8 -*-

'''

Created on Mar 13, 2012

@author: ymh and tc

'''

from django.core.cache import cache

from django.core.exceptions import ValidationError

from django.http.response import Http404

from django.shortcuts import get_object_or_404

from django.utils.encoding import smart_str

from renkanmanager.models import Renkan

import math

import hashlib

import re

import uuid

import logging

logger = logging.getLogger(__name__)

def fix_cache_key(key):

    cache_key = re.sub(r'\s+', '-', key)

    cache_key = smart_str(cache_key)

    if len(cache_key) > (250-(2+len(cache.key_prefix)+len(str(cache.version)))-33):

        cache_key = cache_key[:(250-(2+len(cache.key_prefix)+len(str(cache.version)))-33)] + '-' + hashlib.md5(cache_key).hexdigest()

    return cache_key

class NodePlacer():

    cat_nb_nodes = {}

    def init(self, cat_nb_nodes_initial):

        raise NotImplementedError( "Should have implemented init" )

    def get_place(self, category):

        if not category or category not in self.cat_nb_nodes:

            raise Http404

        return self.cat_nb_nodes[category].pop(0)

class LineNodePlacer(NodePlacer): #vertical lines

    max_length = 0

    def init(self, cat_nb_nodes_initial):

        for c in cat_nb_nodes_initial:

            nb = cat_nb_nodes_initial[c]

            if isinstance(cat_nb_nodes_initial[c], tuple):

                _, nb = nb

            self.max_length = nb if nb > self.max_length else self.max_length

        for i_cat,c in enumerate(cat_nb_nodes_initial):

            self.cat_nb_nodes[c] = []

            order = i_cat

            nb = cat_nb_nodes_initial[c]

            if isinstance(cat_nb_nodes_initial[c], tuple):

                order, nb = nb

            offset = float(self.max_length - nb) / 2

            for i in xrange(nb):

                if c=="northwest":

                    self.cat_nb_nodes[c].append({ "x": order*500, "y": offset })

                else:

                    self.cat_nb_nodes[c].append({ "x": order*500, "y": 100*(i+offset) })

class HorLineNodePlacer(NodePlacer): #horizontal lines

    max_length = 0

    def init(self, cat_nb_nodes_initial):

        for c in cat_nb_nodes_initial:

            nb = cat_nb_nodes_initial[c]

            if isinstance(cat_nb_nodes_initial[c], tuple):

                _, nb = nb

            self.max_length = nb if nb > self.max_length else self.max_length

        for i_cat,c in enumerate(cat_nb_nodes_initial):

            self.cat_nb_nodes[c] = []

            order = i_cat

            nb = cat_nb_nodes_initial[c]

            if isinstance(cat_nb_nodes_initial[c], tuple):

                order, nb = nb

            offset = float(self.max_length - nb) / 2

            for i in xrange(nb):

                if c=="northwest":

                    self.cat_nb_nodes[c].append({ "x": offset, "y": order*500 })

                else:

                    if (i%2) == 0:

                        self.cat_nb_nodes[c].append({ "x": 100*(i+offset), "y": order*500 })

                    else:

                        self.cat_nb_nodes[c].append({ "x": 100*(i+offset), "y": order*450 })

class CircleNodePlacer(NodePlacer):

    def init(self, cat_nb_nodes_initial):

        for i_cat,c in enumerate(cat_nb_nodes_initial):

            self.cat_nb_nodes[c] = []

            order = i_cat

            nb = cat_nb_nodes_initial[c]

            if isinstance(cat_nb_nodes_initial[c], tuple):

                order, nb = nb

            order -= 1

            for i in xrange(nb):

                radius = (order*500) if order>0 else 100

                angle = 2 * math.pi * i / nb

                if c=="northwest":

                    self.cat_nb_nodes[c].append({ "x": -radius, "y": -radius })

                else:

                    self.cat_nb_nodes[c].append({ "x": radius*math.cos(angle), "y": radius*math.sin(angle) })

def renkan_copier(user, old_rk_id):

    old_rk = get_object_or_404(Renkan, rk_id=old_rk_id)

    rk = Renkan()

    rk.rk_id = unicode(uuid.uuid1())

    rk.owner = user

    rk.content = old_rk.content

    #TODO : update title and uuid in the content's json data

    rk.title = old_rk.title + " (copy)"

    rk.save()

    return rk

def renkan_deleter(user, rk_id):

    rk = get_object_or_404(Renkan, rk_id=rk_id)

    if rk.owner==user:

        rk.delete()

    else:

        raise ValidationError("You are not allowed to remove this renkan")