'use strict';

// require('../../../support/test-helper');
var assert = require('assert');

var MapConfigAdapter = require('../../../lib/models/mapconfig/adapter');

describe('MapConfigAdapter', function () {
    var user = 'wadus';
    function requestMapConfig () {
        return {
            val: 0
        };
    }
    function params () {
        return {};
    }
    function context () {
        return {};
    }

    function createAdapter (valOperatorFn) {
        return function ValMapConfigAdapter () {
            this.getMapConfig = function (user, requestMapConfig, params, context, callback) {
                requestMapConfig.val = valOperatorFn(requestMapConfig.val);
                return callback(null, requestMapConfig);
            };
        };
    }
    var IncValMapConfigAdapter = createAdapter(function (val) { return val + 1; });
    var Mul2ValMapConfigAdapter = createAdapter(function (val) { return val * 2; });

    function validateMapConfig (adapter, expectedNumAdapters, expectedVal, callback) {
        assert.strictEqual(adapter.adapters.length, expectedNumAdapters);
        adapter.getMapConfig(user, requestMapConfig(), params(), context(), function (err, mapConfig) {
            assert.strictEqual(mapConfig.val, expectedVal);
            return callback(err);
        });
    }

    it('works with no adapters', function (done) {
        var adapter = new MapConfigAdapter();
        validateMapConfig(adapter, 0, 0, done);
    });

    it('works with no adapters as empty array', function (done) {
        var adapter = new MapConfigAdapter([]);
        validateMapConfig(adapter, 0, 0, done);
    });

    it('works with basic adapter', function (done) {
        var adapter = new MapConfigAdapter(new IncValMapConfigAdapter());
        validateMapConfig(adapter, 1, 1, done);
    });

    it('works with basic adapter as array', function (done) {
        var adapter = new MapConfigAdapter([new IncValMapConfigAdapter()]);
        validateMapConfig(adapter, 1, 1, done);
    });

    it('works with several adapters', function (done) {
        var adapter = new MapConfigAdapter(new IncValMapConfigAdapter(), new IncValMapConfigAdapter());
        validateMapConfig(adapter, 2, 2, done);
    });

    it('works with several adapters as array', function (done) {
        var adapter = new MapConfigAdapter([new IncValMapConfigAdapter(), new IncValMapConfigAdapter()]);
        validateMapConfig(adapter, 2, 2, done);
    });

    it('should execute in order 1', function (done) {
        var adapter = new MapConfigAdapter([new Mul2ValMapConfigAdapter(), new IncValMapConfigAdapter()]);
        validateMapConfig(adapter, 2, 1, done);
    });

    it('should execute in order 2', function (done) {
        var adapter = new MapConfigAdapter([new IncValMapConfigAdapter(), new Mul2ValMapConfigAdapter()]);
        validateMapConfig(adapter, 2, 2, done);
    });

    it('should execute in order 3', function (done) {
        var adapter = new MapConfigAdapter([new Mul2ValMapConfigAdapter(), new Mul2ValMapConfigAdapter()]);
        validateMapConfig(adapter, 2, 0, done);
    });

    it('should execute in order 4', function (done) {
        var Mul5ValMapConfigAdapter = createAdapter(function (val) { return val * 5; });
        var adapter = new MapConfigAdapter(
            new IncValMapConfigAdapter(),
            new Mul2ValMapConfigAdapter(),
            new Mul5ValMapConfigAdapter()
        );
        validateMapConfig(adapter, 3, 10, done);
    });
});