var express = require("express")
  , HTTPResult = require("../util/http-result")
  , etags = require("../util/etags")
  , cryptoken = require("../util/crypto-token")
  , _ = require('underscore')
  ;

module.exports = function(couch,schema) {
    var exports = {};

    var util = require('./util')(couch,schema);
    var app = exports.app = express();

    var getResponsesBySurveyRunId = exports.getResponsesBySurveyRunId = function(surveyRunId) {
        return couch.get('_design/responses/_view/by_surveyrun',
                         {query:{key:surveyRunId,reduce:false,include_docs:true}})
        .handle({
            '-1': _.identity,
            200: util.handleRowDocs,
            default: util.handleUnknownResponse
        });
    };

    app.get('/',
        util.ensureMIME(util.JSON_MIME),
        function(req,res){
            var hr;
            if ( 'surveyRunId' in req.query ) {
                hr = getResponsesBySurveyRunId(req.query.surveyRunId);
            } else {
                hr = util.getDocumentsOfType('Response');
            }
            hr.handle({'-1': util.handleException})
              .handle(res.send.bind(res));
        });
    app.get('/:id',
        util.ensureMIME(util.JSON_MIME),
        util.makeDocGet_id('Response'));
    app.post('/api/responses',
        util.ensureMIME(util.JSON_MIME),
        function (req,res) {
            var doc = req.body;
            cryptoken()
            .then(function(token) {
                doc.secret = token;
                return util.postDocument('Response',doc);
            })
            .handle({'-1': util.handleException})
            .handle(res.send.bind(res));
        });
    app.put('/:id',
        util.ensureMIME(util.JSON_MIME),
        function (req,res) {
            var id = req.params.id;
            var doc = req.body;
            var rev = etags.parse(req.header('If-Match'))[0] || (doc && doc._rev);
            var hr;
            if ( typeof doc.secret === 'undefined' ) {
                hr = util.randomToken()
                .handle({
                    201: function(token) {
                        doc.secret = token;
                        return util.putDocument(id,rev,'Response',doc);
                    }
                });
            } else {
                hr = util.putDocument(id,rev,'Response',doc);
            }
            hr.handle({'-1': util.handleException})
              .handle(res.send.bind(res));
        });
    app.delete('/:id',
        util.ensureMIME(util.JSON_MIME),
        util.makeDocDel_id('Response'));
    return exports;
};