var _ = require('underscore')
  , HTTPResult = require('../util/http-result')
  , validator = require('../util/validator')
  , CouchDB = require('../util/couch')
  , objF = require('../util/object')
  ;

var schema = require('./couchdb-schema');

module.exports = function(couchServerURL,dbName) {
    var server = new CouchDB(couchServerURL,dbName);
    var designRe = /^_design\//;

    return server.get('/_all_docs')
    .then(function(allDocs){
        return _.chain(allDocs.rows)
        .filter(function(doc){
            return doc.id.match(designRe) === null;
        })
        .reduce(function(memo, doc){
            return memo.then(function(result){
                return server.get(doc.id)
                .then(function(doc){
                    var valid = validator(doc,schema);
                    result[doc._id] = valid;
                    return result;
                });
            });
        }, new HTTPResult(200,{}))
        .value();
    }).then(function(result){
        return server.get('_design/questions/_view/all_variables')
        .then(function(variables){
            var dups = objF.findDuplicates(
                variables.rows,
                function(row){ return row.key; });
            result._duplicateVariables = _.groupBy(
                dups,
                function(dup){ return dup.key; });
            return result;
        });
    });
};