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import wsgiref.handlers, os, sys, re, logging, urllib, md5
from google.appengine.ext.webapp import template
from google.appengine.api import users, urlfetch, memcache
from google.appengine.ext import webapp, db

inner_counter = ['visit_url_record','url_record','visit_host_record','host_record']

ga = """
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-95317-5");
pageTracker._trackPageview();
} catch(err) {}</script>
"""

class UrlRecord(db.Model):
    host = db.StringProperty()
    url = db.StringProperty()
    title = db.TextProperty()
    count = db.IntegerProperty()
    created = db.DateTimeProperty(auto_now_add=True)
    updated = db.DateTimeProperty(auto_now=True)

class VisitRecord(db.Model):
    url = db.StringProperty()
    created = db.DateTimeProperty(auto_now_add=True)
    updated = db.DateTimeProperty(auto_now=True)
    user_agent = db.StringProperty()
    address = db.StringProperty()
    
class Counter(db.Model):
    created = db.DateTimeProperty(auto_now_add=True)
    updated = db.DateTimeProperty(auto_now=True)
    type = db.BooleanProperty()
    name = db.StringProperty()
    value= db.IntegerProperty()

class LocalUser(db.Model):
    user = db.UserProperty()
    created = db.DateTimeProperty(auto_now_add=True)
    updated = db.DateTimeProperty(auto_now=True)
    

def add_count(name, delta):
    counter = Counter.all().filter('name =', name).get()
    if counter is None:
        if name in inner_counter:
            counter = Counter(name=name, value=delta, type=True)
        else:
            counter = Counter(name=name, value=delta, type=False)
    else:
        counter.value += delta
    counter.put()

def get_count(name):
    counter = Counter.all().filter('name =', name).get()
    if counter is None:
        if name in inner_counter:
            counter = Counter(name=name, value=0, type=True)
        else:
            counter = Counter(name=name, value=0, type=False)
        counter.put()
    return counter.value
template_values = {}
class MainPage(webapp.RequestHandler):
    def get(self):
        db.delete(Counter.all().fetch(100))
        db.delete(UrlRecord.all().fetch(100))
        db.delete(VisitRecord.all().fetch(100))
        try:
            for k,v in self.request.headers.items():
                logging.info('%s = %s ' %(k,v))
        except:
            pass
        uri = self.request.uri
        host = '%s://%s/' % (self.request.scheme, self.request.host)
        if uri.find('?') != -1:
            uri = urllib.unquote(uri.split('?')[0]) + '?' + uri.split('?')[-1]
        else:
            uri = urllib.unquote(self.request.uri)
        url_list = uri.split('/')
        local_host = '/'.join(url_list[0:4]) + '/'
        path = os.path.join(os.path.dirname(__file__), 'index.html')
        if uri == host:
            self.response.out.write(template.render(path, template_values))
            self.response.out.write(ga)
            return
        else:
            remote_host = 'http://' + url_list[3] + '.blogspot.com/'
        url = (remote_host + '/'.join(url_list[4:]))
        logging.debug(unicode(url, 'utf-8'))
        result = None
        m_s = None
        try:
            m = md5.new()
            m.update(unicode(url, 'utf-8'))
            m_s = m.hexdigest()
            result = memcache.get(m_s)
        except:
            pass
        if result is None:
            try:
                result = urlfetch.fetch(url, headers=self.request.headers)
            except:
                template_values['error_msg'] = '[%s]' % url
                self.response.out.write(template.render(path, template_values))
                return
            if result.status_code == 200:
                self.response.headers = result.headers
                if result.headers['Content-Type'].find('image') != -1:
                    self.response.out.write(result.content)
                    if m_s is not None:
                        memcache.add(m_s,result)
                    return
                if result.headers['Content-Type'].find('html') != -1:
                    self.response.out.write(self.replace(result.content,{remote_host:local_host,}))
                    self.response.out.write(ga)
            else:
                template_values['error_msg'] = '[%s]' % url
                self.response.out.write(template.render(path, template_values))
        else:
           self.response.headers = result.headers   
           self.response.out.write(result.content)    
    def post(self):
        stuff_url = self.request.get('stuff_url')
        if stuff_url == '':
            self.redirect('/')
        else:
            self.redirect('/%s' % stuff_url)
        pass
       
        
    def replace(self,content,replace_str_dict={}):
        for k,v in replace_str_dict.items():
            content = content.replace(k,v)
        return content
    
def main():
    application = webapp.WSGIApplication(
                                       [('/.*', MainPage),],
                                       debug=False)
    wsgiref.handlers.CGIHandler().run(application)

if __name__ == "__main__":
    main()