var tcrudSetup   = require('./../tcrud-setup');
var debug        = require('debug')('ff:tcrud:ldapjs');

module.exports = {
	registrate: function(key,client) {
		tcrudSetup.pluginLoad(new LdapJSPlugin(key,client));
	}
}

// ------- LdapJSPlugin Object

function LdapJSPlugin(key,client) {
	this.key = key;
	this.client = client;
}

LdapJSPlugin.prototype.configPlugin = function (ctx) {
	ctx.key='ldapjs#'+this.key;
	ctx.description='Adds ldap backend support.';
};

LdapJSPlugin.prototype.createBackend = function() {
	return new LdapJSBackend(this);
}

// -------- LdapJSBackend Object

function LdapJSBackend(plugin) {
	this.plugin = plugin;
}

LdapJSBackend.prototype.getKey = function() {
	return this.plugin.key;
}

// see http://ldapjs.org/client.html#connection-management
LdapJSBackend.prototype.findAll = function(tview,crudType) {
	var self = this;
	return function(data, dataParam, cb) {
		var opts = {
			filter2: '(&(l=Seattle)(email=*@foo.com))',
			scope: 'sub'
		};
		debug('findAll %s',opts);
		var ss = 'ou=users,dc=nss,dc=forwardfire,dc=net';
		console.log("ldap search "+ss);
		self.plugin.client.search(ss, opts, function(err, res) {
			if (err) {
				debug(err);
				cb(err);
				return;
			}
			//var querySql = 'SELECT '+selectField(tview,crudType)+' FROM '+tview.tmeta.tmodel.tid+'';
			var result = [];
			res.on('searchEntry', function(entry) {
				result.push(entry.object);
			});
			res.on('error', function(err) {
				cb(err);
			});
			res.on('end', function(status) {
				cb(err,result);
			});
		});
	};
}

LdapJSBackend.prototype.createNew = function(tview,crudType) {
	var self = this;
	return function(data, dataParam, cb) {
		var entry = {
			cn: 'foo',
			sn: 'bar',
			email: ['foo@bar.com', 'foo1@bar.com'],
			objectclass: 'fooPerson'
		};
		self.plugin.client.add('cn=foo, o=example', entry, function(err) {
			if (err) {
				debug(err);
				cb(err);
			} else {
				cb(err,result.rows);
			}
		});
	};
}

LdapJSBackend.prototype.findOne = function(tview,crudType) {
	var self = this;
	return function(data, dataParam, cb) {
		var querySql = 'SELECT '+selectField(tview,crudType)+' FROM '+tview.tmeta.tmodel.tid+' WHERE '+whereKeys(tview)+'';
		debug('findOne param %s',JSON.stringify(dataParam));
		debug('findOne sql %s',querySql);
		var query = self.db.query(querySql, dataParam, function (err, result) {
			if (err) {
				debug(err);
				cb(err);
			} else {
				cb(err,result.rows[0]);
			}
		});
	};
}

LdapJSBackend.prototype.updateOne = function(tview,crudType) {
	var self = this;
	return function(data, dataParam, cb) {
		var querySql = 'UPDATE '+tview.tmeta.tmodel.tid+' '+updateValues(tview,data)+' WHERE '+whereKeys(tview);
		debug('updateOne param %s',JSON.stringify(dataParam));
		debug('updateOne data %s',JSON.stringify(data));
		debug('updateOne sql %s',querySql);
		var query = self.db.query(querySql, data, function (err, result) {
			if (err) {
				debug(err);
				cb(err);
			} else {
				cb(err,result.rows[0]);
			}
		});
	};
}

LdapJSBackend.prototype.deleteOne = function(tview,crudType) {
	var self = this;
	return function(data, dataParam, cb) {
		var querySql = 'DELETE FROM '+tview.tmeta.tmodel.tid+' WHERE '+whereKeys(tview);
		debug('deleteOne param %s',JSON.stringify(dataParam));
		debug('deleteOne sql %s',querySql);
		var query = self.db.query(querySql, dataParam, function (err, result) {
			if (err) {
				debug(err);
				cb(err);
			} else {
				cb(err,result.rows[0]);
			}
		});
	};
}

LdapJSBackend.prototype.findAllCount = function(tview,crudType) {
	var self = this;
	return function(data, dataParam, cb) {
		var querySql = 'SELECT count(*) FROM '+tview.tmeta.tmodel.tid+' WHERE '+whereKeys(tview);
		debug('findAllCount param %s',JSON.stringify(dataParam));
		debug('findAllCount sql %s',querySql);
		var query = self.db.query(querySql, dataParam, function (err, result) {
			if (err) {
				debug(err);
				cb(err);
			} else {
				cb(err,result.rows[0]);
			}
		});
	};
}