from django.core.files.base import ContentFile
from django.contrib.staticfiles.finders import AppDirectoriesFinder
from django.contrib.staticfiles.storage import AppStaticStorage,staticfiles_storage
from . import source,JavascriptGenerator
import os
import sys
from django.conf import settings
class BeardJSStorage(AppStaticStorage):
    prefix = None
    source_dir = 'templates'

    def __init__(self, app, *args, **kwargs):
        super(BeardJSStorage, self).__init__(app, *args, **kwargs)
    def _open(self, name, mode='rb'):
        if not name.endswith('.js'): raise NotImplementedError()
        if not name.startswith('beard/'): raise NotImplementedError()
        if not mode.startswith('r'): raise NotImplementedError()
        name=name[6:-3]
        text = open(self.path(name+'.beard'), mode).read()
        return ContentFile(source(text,JavascriptGenerator(name)))
    def _save(self, name, content):
        raise NotImplementedError()
class Finder(AppDirectoriesFinder):
    storage_class = BeardJSStorage
    def __init__(self, apps=None, *args, **kwargs):
        super(Finder, self).__init__(apps,*args, **kwargs)

    def list(self, ignore_patterns):
        beards=[]
        for name,storage in super(Finder,self).list(ignore_patterns):
            if name.endswith('.beard'):
                beards.append(('beard/'+name[:-6]+'.js',storage))
        return beards
    def find(self, opath, all=False):
        if all:
           raise NotImplementedError()
        path=opath[6:-3]+'.beard'
        abspath=super(Finder,self).find(path)
        text = open(abspath).read()
        template=source(text,JavascriptGenerator(path[:-6]))
        dir=os.path.join(settings.STATIC_ROOT,os.path.dirname(path))
        try:
           os.makedirs(dir)
        except OSError:
           pass
        staticpath=os.path.join(settings.STATIC_ROOT,opath)
        f=open(staticpath,'w')
        f.write(template)
        f.close()
        
        return staticpath