/**
 * Copyright 2014, 2015 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var log;
var redNodes;
var settings;

module.exports = {
    init: function(runtime) {
        settings = runtime.settings;
        redNodes = runtime.nodes;
        log = runtime.log;
    },
    get: function(req,res) {
        var id = req.params.id;
        var flow = redNodes.getFlow(id);
        if (flow) {
            log.audit({event: "flow.get",id:id},req);
            res.json(flow);
        } else {
            log.audit({event: "flow.get",id:id,error:"not_found"},req);
            res.status(404).end();
        }
    },
    post: function(req,res) {
        var flow = req.body;
        redNodes.addFlow(flow).then(function(id) {
            log.audit({event: "flow.add",id:id},req);
            res.json({id:id});
        }).otherwise(function(err) {
            log.audit({event: "flow.add",error:err.code||"unexpected_error",message:err.toString()},req);
            res.status(400).json({error:err.code||"unexpected_error", message:err.toString()});
        })

    },
    put: function(req,res) {
        var id = req.params.id;
        var flow = req.body;
        try {
            redNodes.updateFlow(id,flow).then(function() {
                log.audit({event: "flow.update",id:id},req);
                res.json({id:id});
            }).otherwise(function(err) {
                log.audit({event: "flow.update",error:err.code||"unexpected_error",message:err.toString()},req);
                res.status(400).json({error:err.code||"unexpected_error", message:err.toString()});
            })
        } catch(err) {
            if (err.code === 404) {
                log.audit({event: "flow.update",id:id,error:"not_found"},req);
                res.status(404).end();
            } else {
                log.audit({event: "flow.update",error:err.code||"unexpected_error",message:err.toString()},req);
                res.status(400).json({error:err.code||"unexpected_error", message:err.toString()});
            }
        }
    },
    delete: function(req,res) {
        var id = req.params.id;
        try {
            redNodes.removeFlow(id).then(function() {
                log.audit({event: "flow.remove",id:id},req);
                res.status(204).end();
            })
        } catch(err) {
            if (err.code === 404) {
                log.audit({event: "flow.remove",id:id,error:"not_found"},req);
                res.status(404).end();
            } else {
                log.audit({event: "flow.remove",id:id,error:err.code||"unexpected_error",message:err.toString()},req);
                res.status(400).json({error:err.code||"unexpected_error", message:err.toString()});
            }
        }
    }
}
