from osv import osv, fields
import gdata.docs.data
import gdata.docs.client
from gdata.client import RequestError
from gdata.docs.service import DOCUMENT_LABEL

class google_docs_ir_attachment(osv.osv):
    _inherit = 'ir.attachment'

    def _auth(self, cr, uid):
        # check google_base_account
        users_obj = self.pool.get('res.users')
        user = users_obj.browse(cr, uid, [uid])[0]
        if not user.gmail_user or not user.gmail_password: 
            return -2

        # login
        client = gdata.docs.client.DocsClient(source='openerp.com')
        client.ssl = True
        client.http_client.debug = False
        client.ClientLogin(user.gmail_user, user.gmail_password, client.source, service='writely')
        
        return client

    def create_empty_google_doc(self, cr, uid, model, id, context=None):
        #import pdb; pdb.set_trace()
        '''Associate a copy of the gdoc identified by 'gdocs_res_id' to the current entity.
           @param cr: the current row from the database cursor.
           @param uid: the current user ID, for security checks.
           @param model: the current model name.
           @param context: a standard dictionary for contextual values.
           @return the document object.
           @return -2 if the google_base_account hasn't been configured yet.
        '''

        if context is None:
            context={}

        # authenticate
        client = self._auth(cr, uid)
        if client == -2:
            return -2

        if 'type' not in context:
            context['type'] = 'text'

        # create the document in google docs
        if context['type']=='slide':
            local_resource = gdata.docs.data.Resource(gdata.docs.data.PRESENTATION_LABEL)
        elif context['type']=='spreadsheet':
            local_resource = gdata.docs.data.Resource(gdata.docs.data.SPREADSHEET_LABEL)
        else:
            local_resource = gdata.docs.data.Resource(gdata.docs.data.DOCUMENT_LABEL)
        gdocs_resource = client.post(entry=local_resource, uri='https://docs.google.com/feeds/default/private/full/')

        # register into the db
        self.create(cr, uid, {
            'model': context['active_model'], #model,
            'res_id': context['active_id'],
            'type': 'url',
            #'name': TODO pending from the working config
            'url': gdocs_resource.get_alternate_link().href
        })

        return gdocs_resource

    def copy_gdoc(self, cr, uid, model, gdocs_resource_id, context=None):
        if context is None:
            context={}

        client = self._auth(cr, uid)
        if client == -2:
            return -2

        # fetch and copy the original document
        original_resource = client.get_resource_by_id(gdocs_resource_id)
        copy_resource = client.copy_resource(entry=original_resource)

        # register into the db
        self.create(cr, uid, {
            'model': context['active_model'],
            'res_id': context['active_id'],
            'type': 'url',
            #'name': TODO pending from the working config
            'url': copy_resource.get_alternate_link().href
        })

        return copy_resource

    def gdoc_get(self, cr, uid, model, context=None):
        google_docs_config_ref = self.pool.get('google.docs.config')
        google_template_ids = google_docs_config_ref.search(cr, uid, [('model', '=', model)])
        if not google_template_ids:
            # there isn't any template. Create an empty doc.
            return self.create_gdoc(cr, uid, model, context)

        # otherwise, copy document from existing template
        return self.copy_gdoc(cr, uid, model, google_template_ids[0].gdocs_resource_id)

class google_docs_config(osv.osv):
    _name = 'google.docs.config'

    _columns = {
        'model_id': fields.many2one('ir.model', 'Model'),
        'gdocs_resource_id': fields.char('Google resource ID', size=64),
        'name_template': fields.char('GDoc name template ', size=64, help='This is the name which appears on google side'),
        'name': fields.char('Name', size=64, help='This is the attachment\'s name. As well, it appears on the panel.')
        # 'multi': fields.boolean('Multiple documents')
    }

    _defaults = {
        'name_template': 'Google Document'
    }



class google_docs(osv.osv):
    _name = 'google.docs'

    def doc_get(self, cr, uid, model, ids, context=None):# TODO fix logic here
        google_docs_config_ref = self.pool.get('google.docs.config')
        ir_attachment_ref = self.pool.get('ir.attachment')
        google_docs_config = google_docs_config_ref.search(cr, uid, [('model_id', '=', model)])
        
        if not google_docs_config:
            google_document = ir_attachment_ref.create_empty_google_doc(cr, uid, model, ids, context)
        #else:
            

        print google_docs_config

        if not google_docs_config:
            return -1

        

        return 0