/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * 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 should = require("should");
var when = require("when");
var sinon = require("sinon");

var typeRegistry = require("../../../../../red/runtime/nodes/registry/registry");

var Node = require("../../../../../red/runtime/nodes/Node");

var events = require("../../../../../red/runtime/events");

var inherits = require("util").inherits;

describe("red/nodes/registry/registry",function() {

    afterEach(function() {
        typeRegistry.clear();
    });

    function stubSettings(s,available,initialConfig) {
        s.available =  function() {return available;};
        s.set = sinon.spy(function(s,v) { return when.resolve();});
        s.get = function(s) { return initialConfig;};
        return s;
    }

    var settings = stubSettings({},false,null);
    var settingsWithStorageAndInitialConfig = stubSettings({},true,{"node-red":{module:"testModule",name:"testName",version:"testVersion",nodes:{"node":{id:"node-red/testName",name:"test",types:["a","b"],enabled:true}}}});

    var testNodeSet1 = {
        id: "test-module/test-name",
        module: "test-module",
        name: "test-name",
        enabled: true,
        loaded: false,
        config: "configA",
        types: [ "test-a","test-b"]
    };

    var testNodeSet2 = {
        id: "test-module/test-name-2",
        module: "test-module",
        name: "test-name-2",
        enabled: true,
        loaded: false,
        config: "configB",
        types: [ "test-c","test-d"]
    };
    var testNodeSet2WithError = {
        id: "test-module/test-name-2",
        module: "test-module",
        name: "test-name-2",
        enabled: true,
        loaded: false,
        err: "I have an error",
        config: "configC",
        types: [ "test-c","test-d"]
    };




    describe('#init/load', function() {
        it('loads initial config', function(done) {
            typeRegistry.init(settingsWithStorageAndInitialConfig);
            typeRegistry.getNodeList().should.have.lengthOf(0);
            typeRegistry.load();
            typeRegistry.getNodeList().should.have.lengthOf(1);
            done();
        });

        it('migrates legacy format', function(done) {
            var legacySettings = {
                available: function() { return true; },
                set: sinon.stub().returns(when.resolve()),
                get: function() { return {
                    "123": {
                        "name": "72-sentiment.js",
                        "types": [
                            "sentiment"
                        ],
                        "enabled": true
                    },
                    "456": {
                        "name": "20-inject.js",
                        "types": [
                            "inject"
                        ],
                        "enabled": true
                    },
                    "789": {
                        "name": "testModule:a-module.js",
                        "types": [
                            "example"
                        ],
                        "enabled":true,
                        "module":"testModule"
                    }
                 }}
            };
            var expected = JSON.parse('{"node-red":{"name":"node-red","nodes":{"sentiment":{"name":"sentiment","types":["sentiment"],"enabled":true,"module":"node-red"},"inject":{"name":"inject","types":["inject"],"enabled":true,"module":"node-red"}}},"testModule":{"name":"testModule","nodes":{"a-module.js":{"name":"a-module.js","types":["example"],"enabled":true,"module":"testModule"}}}}');
            typeRegistry.init(legacySettings);
            typeRegistry.load();
            legacySettings.set.calledOnce.should.be.true();
            legacySettings.set.args[0][1].should.eql(expected);
            done();
        });
    });


    describe('#addNodeSet', function() {
       it('adds a node set for an unknown module', function() {

           typeRegistry.init(settings);

           typeRegistry.getNodeList().should.have.lengthOf(0);
           typeRegistry.getModuleList().should.eql({});

           typeRegistry.addNodeSet("test-module/test-name",testNodeSet1, "0.0.1");

           typeRegistry.getNodeList().should.have.lengthOf(1);
           var moduleList = typeRegistry.getModuleList();
           moduleList.should.have.a.property("test-module");
           moduleList["test-module"].should.have.a.property("name","test-module");
           moduleList["test-module"].should.have.a.property("version","0.0.1");
           moduleList["test-module"].should.have.a.property("nodes");
           moduleList["test-module"].nodes.should.have.a.property("test-name");

           moduleList["test-module"].nodes["test-name"].should.eql({
                   config: 'configA',
                   id: 'test-module/test-name',
                   module: 'test-module',
                   name: 'test-name',
                   enabled: true,
                   loaded: false,
                   types: [ 'test-a', 'test-b' ]
           });

       });

       it('adds a node set to an existing module', function() {

           typeRegistry.init(settings);
           typeRegistry.getNodeList().should.have.lengthOf(0);
           typeRegistry.getModuleList().should.eql({});

           typeRegistry.addNodeSet("test-module/test-name",testNodeSet1, "0.0.1");

           typeRegistry.getNodeList().should.have.lengthOf(1);
           var moduleList = typeRegistry.getModuleList();
           Object.keys(moduleList).should.have.a.lengthOf(1);
           moduleList.should.have.a.property("test-module");
           moduleList["test-module"].should.have.a.property("name","test-module");
           moduleList["test-module"].should.have.a.property("version","0.0.1");
           moduleList["test-module"].should.have.a.property("nodes");

           Object.keys(moduleList["test-module"].nodes).should.have.a.lengthOf(1);
           moduleList["test-module"].nodes.should.have.a.property("test-name");


           typeRegistry.addNodeSet("test-module/test-name-2",testNodeSet2);

           typeRegistry.getNodeList().should.have.lengthOf(2);
           moduleList = typeRegistry.getModuleList();
           Object.keys(moduleList).should.have.a.lengthOf(1);
           Object.keys(moduleList["test-module"].nodes).should.have.a.lengthOf(2);
           moduleList["test-module"].nodes.should.have.a.property("test-name");
           moduleList["test-module"].nodes.should.have.a.property("test-name-2");
       });

       it('doesnt add node set types if node set has an error', function() {
           typeRegistry.init(settings);
           typeRegistry.getNodeList().should.have.lengthOf(0);
           typeRegistry.getModuleList().should.eql({});

           typeRegistry.addNodeSet("test-module/test-name",testNodeSet1, "0.0.1");

           typeRegistry.getTypeId("test-a").should.eql("test-module/test-name");

           should.not.exist(typeRegistry.getTypeId("test-c"));

           typeRegistry.addNodeSet("test-module/test-name-2",testNodeSet2WithError, "0.0.1");

           should.not.exist(typeRegistry.getTypeId("test-c"));
         });
    });

    describe("#enableNodeSet", function() {
        it('throws error if settings unavailable', function() {
            typeRegistry.init(settings);
            /*jshint immed: false */
            (function(){
                typeRegistry.enableNodeSet("test-module/test-name");
            }).should.throw("Settings unavailable");
        });

        it('throws error if module unknown', function() {
            typeRegistry.init(settingsWithStorageAndInitialConfig);
            /*jshint immed: false */
            (function(){
                typeRegistry.enableNodeSet("test-module/unknown");
            }).should.throw("Unrecognised id: test-module/unknown");
        });
        it.skip('enables the node',function(){})

    });
    describe("#disableNodeSet", function() {
        it('throws error if settings unavailable', function() {
            typeRegistry.init(settings);
            /*jshint immed: false */
            (function(){
                typeRegistry.disableNodeSet("test-module/test-name");
            }).should.throw("Settings unavailable");
        });

        it('throws error if module unknown', function() {
            typeRegistry.init(settingsWithStorageAndInitialConfig);
            /*jshint immed: false */
            (function(){
                typeRegistry.disableNodeSet("test-module/unknown");
            }).should.throw("Unrecognised id: test-module/unknown");
        });
        it.skip('disables the node',function(){})
    });

    describe('#getNodeConfig', function() {
        it('returns nothing for an unregistered type config', function(done) {
            typeRegistry.init(settings);
            var config = typeRegistry.getNodeConfig("imaginary-shark");
            (config === null).should.be.true();
            done();
        });
    });

    describe('#saveNodeList',function() {
        it('rejects when settings unavailable',function(done) {
            typeRegistry.init(stubSettings({},false,{}));
            typeRegistry.addNodeSet("test-module/test-name",testNodeSet1, "0.0.1");
            typeRegistry.saveNodeList().otherwise(function(err) {
                done();
            });
        });
        it('saves the list',function(done) {
            var s = stubSettings({},true,{});
            typeRegistry.init(s);
            typeRegistry.addNodeSet("test-module/test-name",testNodeSet1, "0.0.1");
            typeRegistry.addNodeSet("test-module/test-name-2",testNodeSet2WithError, "0.0.1");
            typeRegistry.saveNodeList().then(function() {
                s.set.called.should.be.true();
                s.set.lastCall.args[0].should.eql('nodes');
                var nodes = s.set.lastCall.args[1];
                nodes.should.have.property('test-module');
                for (var n in nodes['test-module'].nodes) {
                    var nn = nodes['test-module'].nodes[n];
                    nn.should.not.have.property('err');
                    nn.should.not.have.property('id');
                }
                done();
            }).otherwise(function(err) {
                done(err);
            });
        });
    });

    describe('#removeModule',function() {
        it('throws error for unknown module', function() {
            var s = stubSettings({},true,{});
            typeRegistry.init(s);
            /*jshint immed: false */
            (function(){
                typeRegistry.removeModule("test-module/unknown");
            }).should.throw("Unrecognised module: test-module/unknown");
        });
        it('throws error for unavaiable settings', function() {
            var s = stubSettings({},false,{});
            typeRegistry.init(s);
            /*jshint immed: false */
            (function(){
                typeRegistry.removeModule("test-module/unknown");
            }).should.throw("Settings unavailable");
        });
        it('removes a known module', function() {
            var s = stubSettings({},true,{});
            typeRegistry.init(s);
            typeRegistry.addNodeSet("test-module/test-name",testNodeSet1, "0.0.1");
            var moduleList = typeRegistry.getModuleList();
            moduleList.should.have.a.property("test-module");
            typeRegistry.getNodeList().should.have.lengthOf(1);

            var info = typeRegistry.removeModule('test-module');
            moduleList = typeRegistry.getModuleList();
            moduleList.should.not.have.a.property("test-module");
            typeRegistry.getNodeList().should.have.lengthOf(0);
        });
    });

    describe('#get[All]NodeConfigs', function() {
        it('returns node config', function() {
            typeRegistry.init(settings,{
                getNodeHelp: function(config) { return "HE"+config.name+"LP" }
            });
            typeRegistry.addNodeSet("test-module/test-name",{
                id: "test-module/test-name",
                module: "test-module",
                name: "test-name",
                enabled: true,
                loaded: false,
                config: "configA",
                types: [ "test-a","test-b"]
            }, "0.0.1");
            typeRegistry.getNodeConfig("test-module/test-name").should.eql('configAHEtest-nameLP');
            typeRegistry.getAllNodeConfigs().should.eql('configAHEtest-nameLP');

            typeRegistry.addNodeSet("test-module/test-name-2",{
                id: "test-module/test-name-2",
                module: "test-module",
                name: "test-name-2",
                enabled: true,
                loaded: false,
                config: "configB",
                types: [ "test-a","test-b"]
            }, "0.0.1");
            typeRegistry.getNodeConfig("test-module/test-name-2").should.eql('configBHEtest-name-2LP');
            typeRegistry.getAllNodeConfigs().should.eql('configAHEtest-nameLPconfigBHEtest-name-2LP');
        });
    });
    describe('#getModuleInfo', function() {
        it('returns module info', function() {
            typeRegistry.init(settings,{});
            typeRegistry.addNodeSet("test-module/test-name",{
                id: "test-module/test-name",
                module: "test-module",
                name: "test-name",
                enabled: true,
                loaded: false,
                config: "configA",
                types: [ "test-a","test-b"],
                file: "abc"
            }, "0.0.1");
            var moduleInfo = typeRegistry.getModuleInfo("test-module");
            moduleInfo.should.have.a.property('name','test-module');
            moduleInfo.should.have.a.property('version','0.0.1');
            moduleInfo.should.have.a.property('nodes');
            moduleInfo.nodes.should.have.a.lengthOf(1);
            moduleInfo.nodes[0].should.have.a.property('id','test-module/test-name');
            moduleInfo.nodes[0].should.not.have.a.property('file');
        });
    });
    describe('#getNodeInfo', function() {
        it('returns node info', function() {
            typeRegistry.init(settings,{});
            typeRegistry.addNodeSet("test-module/test-name",{
                id: "test-module/test-name",
                module: "test-module",
                name: "test-name",
                enabled: true,
                loaded: false,
                config: "configA",
                types: [ "test-a","test-b"],
                file: "abc"
            }, "0.0.1");
            var nodeSetInfo = typeRegistry.getNodeInfo("test-module/test-name");
            nodeSetInfo.should.have.a.property('id',"test-module/test-name");
            nodeSetInfo.should.not.have.a.property('config');
            nodeSetInfo.should.not.have.a.property('file');
        });
    });
    describe('#getFullNodeInfo', function() {
        it('returns node info', function() {
            typeRegistry.init(settings,{});
            typeRegistry.addNodeSet("test-module/test-name",{
                id: "test-module/test-name",
                module: "test-module",
                name: "test-name",
                enabled: true,
                loaded: false,
                config: "configA",
                types: [ "test-a","test-b"],
                file: "abc"

            }, "0.0.1");
            var nodeSetInfo = typeRegistry.getFullNodeInfo("test-module/test-name");
            nodeSetInfo.should.have.a.property('id',"test-module/test-name");
            nodeSetInfo.should.have.a.property('config');
            nodeSetInfo.should.have.a.property('file');
        });
    });
    describe('#cleanModuleList', function() {
        it.skip("cleans the module list");
    });
    describe('#getNodeList', function() {
        it("returns a filtered list", function() {
            typeRegistry.init(settings,{});
            typeRegistry.addNodeSet("test-module/test-name",{
                id: "test-module/test-name",
                module: "test-module",
                name: "test-name",
                enabled: true,
                loaded: false,
                config: "configA",
                types: [ "test-a","test-b"],
                file: "abc"
            }, "0.0.1");
            typeRegistry.addNodeSet("test-module/test-name-2",{
                id: "test-module/test-name-2",
                module: "test-module",
                name: "test-name-2",
                enabled: true,
                loaded: false,
                config: "configB",
                types: [ "test-c","test-d"],
                file: "def"
            }, "0.0.1");
            var filterCallCount = 0;
            var filteredList = typeRegistry.getNodeList(function(n) { filterCallCount++; return n.name === 'test-name-2';});
            filterCallCount.should.eql(2);
            filteredList.should.have.a.lengthOf(1);
            filteredList[0].should.have.a.property('id',"test-module/test-name-2");
        });
    });

    describe('#registerNodeConstructor', function() {
        var TestNodeConstructor;
        beforeEach(function() {
            TestNodeConstructor = function TestNodeConstructor() {
            };
            sinon.stub(events,'emit');
        });
        afterEach(function() {
            events.emit.restore();
        });
        it('registers a node constructor', function() {
            typeRegistry.registerNodeConstructor('node-set','node-type',TestNodeConstructor);
            events.emit.calledOnce.should.be.true();
            events.emit.lastCall.args[0].should.eql('type-registered');
            events.emit.lastCall.args[1].should.eql('node-type');
        })
        it('throws error on duplicate node registration', function() {
            typeRegistry.registerNodeConstructor('node-set','node-type',TestNodeConstructor);
            events.emit.calledOnce.should.be.true();
            events.emit.lastCall.args[0].should.eql('type-registered');
            events.emit.lastCall.args[1].should.eql('node-type');
            /*jshint immed: false */
            (function(){
                typeRegistry.registerNodeConstructor('node-set','node-type',TestNodeConstructor);
            }).should.throw("node-type already registered");
            events.emit.calledOnce.should.be.true();
        });
        it('extends a constructor with the Node constructor', function() {
            TestNodeConstructor.prototype.should.not.be.an.instanceOf(Node);
            typeRegistry.registerNodeConstructor('node-set','node-type',TestNodeConstructor);
            TestNodeConstructor.prototype.should.be.an.instanceOf(Node);
        });
        it('does not override a constructor\'s prototype', function() {
            function Foo(){};
            inherits(TestNodeConstructor,Foo);
            TestNodeConstructor.prototype.should.be.an.instanceOf(Foo);
            TestNodeConstructor.prototype.should.not.be.an.instanceOf(Node);

            typeRegistry.registerNodeConstructor('node-set','node-type',TestNodeConstructor);

            TestNodeConstructor.prototype.should.be.an.instanceOf(Node);
            TestNodeConstructor.prototype.should.be.an.instanceOf(Foo);

            typeRegistry.registerNodeConstructor('node-set','node-type2',TestNodeConstructor);
            TestNodeConstructor.prototype.should.be.an.instanceOf(Node);
            TestNodeConstructor.prototype.should.be.an.instanceOf(Foo);
        });
    });

});
