# -*- coding: utf-8 -*-
from openerp import http
from openerp.http import request
from openerp.report import render_report
from werkzeug.wrappers import Response
from werkzeug.datastructures import Headers
from gzip import GzipFile
from StringIO import StringIO as IO
import json
import logging
import base64

LOGGER = logging.getLogger(__name__)
GZIP_COMPRESSION_LEVEL = 9

class PrintEngineController(http.Controller):

    '''
    '''
    def make_info_log(self, log):
        LOGGER.info('[INFO] {}'.format(log))

    '''
        Make GZIP to JSON response
    '''
    def make_gzip_response(self, data=None, status=200):
        gzip_buffer = IO()
        with GzipFile(mode='wb', compresslevel=GZIP_COMPRESSION_LEVEL, fileobj=gzip_buffer) as gzip_file:
            gzip_file.write(json.dumps(data))
        
        contents = gzip_buffer.getvalue()
        gzip_buffer.close()

        headers = Headers()
        headers.add('Content-Encoding', 'gzip')
        headers.add('Vary', 'Accept-Encoding')
        headers.add('Content-Length', len(contents))

        return Response(contents, status=status, headers=headers, content_type='application/json')
 
    '''
    '''
    @http.route('/print_engine/update_printers', auth='user', type='json', methods=['POST'], cors='*')
    def printers_update(self, **kw):

        import pdb; pdb.set_trace()
        return True

    '''
    '''
    @http.route('/print_engine/socket_config', auth='user', type='json')
    def socket_config(self, **kw):
        settings_obj = request.env['print.engine.settings']
        settings = settings_obj.search([])
        
        return {
            'host': settings.host or None,
            'port': settings.port or None,
            'path': settings.path or None
        }

    '''
    '''
    @http.route('/print_engine/get_pdf', auth='user', type='json')
    def get_pdf(self, **kw):
        ctx = request.context

        ir_action = request.env['ir.actions.report.xml'].browse(ctx.get('params').get('action'))
        res_ids = request.env[ctx.get('active_model')].browse(ctx.get('active_ids'))

        if ir_action.report_type in ['qweb-html', 'qweb-pdf']:
            result, format = request.env['report'].get_pdf(res_ids, ir_action.report_name), 'pdf'
        else:
            # TODO: mejorar el renderización de reportes rml de la api v7 a v8
            result, format = render_report(request._cr, request.uid, [res_ids.id], ir_action.report_name, {'model': ctx.get('active_model')}, ctx)

        encoded_result = base64.b64encode(result)

        return {
            'data': 'data:application/%s;base64,%s' % (format, encoded_result)
        }