describe('iD.presetIndex', function () {
    var savedPresets, savedAreaKeys, server;

    before(function () {
        savedPresets = iD.data.presets;
        savedAreaKeys = iD.areaKeys;
    });

    after(function () {
        iD.data.presets = savedPresets;
        iD.setAreaKeys(savedAreaKeys);
    });

    describe('#match', function () {
        var testPresets = {
            presets: {
                point: { tags: {}, geometry: ['point'] },
                line: { tags: {}, geometry: ['line'] },
                vertex: { tags: {}, geometry: ['vertex'] },
                residential: { tags: { highway: 'residential' }, geometry: ['line'] },
                park: { tags: { leisure: 'park' }, geometry: ['point', 'area'] }
            }
        };

        it('returns a collection containing presets matching a geometry and tags', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var way = iD.osmWay({ tags: { highway: 'residential' } });
            var graph = iD.coreGraph([way]);

            expect(presets.match(way, graph).id).to.eql('residential');
        });

        it('returns the appropriate fallback preset when no tags match', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var point = iD.osmNode();
            var line = iD.osmWay({ tags: { foo: 'bar' } });
            var graph = iD.coreGraph([point, line]);

            expect(presets.match(point, graph).id).to.eql('point');
            expect(presets.match(line, graph).id).to.eql('line');
        });

        it('matches vertices on a line as vertices', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var point = iD.osmNode({ tags: { leisure: 'park' } });
            var line = iD.osmWay({ nodes: [point.id], tags: { 'highway': 'residential' } });
            var graph = iD.coreGraph([point, line]);

            expect(presets.match(point, graph).id).to.eql('vertex');
        });

        it('matches vertices on an addr:interpolation line as points', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var point = iD.osmNode({ tags: { leisure: 'park' } });
            var line = iD.osmWay({ nodes: [point.id], tags: { 'addr:interpolation': 'even' } });
            var graph = iD.coreGraph([point, line]);

            expect(presets.match(point, graph).id).to.eql('park');
        });
    });


    describe('#areaKeys', function () {
        var testPresets = {
            presets: {
                'amenity/fuel/shell': { tags: { 'amenity': 'fuel' }, geometry: ['point', 'area'], suggestion: true },
                'highway/foo': { tags: { 'highway': 'foo' }, geometry: ['area'] },
                'leisure/track': { tags: { 'leisure': 'track' }, geometry: ['line', 'area'] },
                'natural': { tags: { 'natural': '*' }, geometry: ['point', 'vertex', 'area'] },
                'natural/peak': { tags: { 'natural': 'peak' }, geometry: ['point', 'vertex'] },
                'natural/tree_row': { tags: { 'natural': 'tree_row' }, geometry: ['line'] },
                'natural/wood': { tags: { 'natural': 'wood' }, geometry: ['point', 'area'] }
            }
        };

        it('whitelists keys for presets with area geometry', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys()).to.include.keys('natural');
        });

        it('blacklists key-values for presets with a line geometry', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys().natural).to.include.keys('tree_row');
            expect(presets.areaKeys().natural.tree_row).to.be.true;
        });

        it('blacklists key-values for presets with both area and line geometry', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys().leisure).to.include.keys('track');
        });

        it('does not blacklist key-values for presets with neither area nor line geometry', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys().natural).not.to.include.keys('peak');
        });

        it('does not blacklist generic \'*\' key-values', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys().natural).not.to.include.keys('natural');
        });

        it('ignores keys like \'highway\' that are assumed to be lines', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys()).not.to.include.keys('highway');
        });

        it('ignores suggestion presets', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            expect(presets.areaKeys()).not.to.include.keys('amenity');
        });
    });

    describe('#build', function () {
        it('builds presets from provided', function () {
            var surfShop = iD.osmNode({ tags: { amenity: 'shop', 'shop:type': 'surf' } });
            var graph = iD.coreGraph([surfShop]);
            var presets = iD.coreContext().presets();
            var morePresets = {
                presets: {
                    'amenity/shop/surf': {
                        tags: { amenity: 'shop', 'shop:type': 'surf' },
                        geometry: ['point', 'area']
                    }
                }
            };

            expect(presets.match(surfShop, graph)).to.eql(undefined); // no surfshop preset yet...
            presets.build(morePresets, true);
            expect(presets.match(surfShop, graph).addTags).to.eql({ amenity: 'shop', 'shop:type': 'surf' });
        });

        it('configures presets\' initial visibility', function () {
            var surfShop = iD.osmNode({ tags: { amenity: 'shop', 'shop:type': 'surf' } });
            var firstStreetJetty = iD.osmNode({ tags: { man_made: 'jetty' } });
            var entities = [surfShop, firstStreetJetty];
            var graph = iD.coreGraph(entities);
            var presets = iD.coreContext().presets();
            var morePresets = {
                presets: {
                    'amenity/shop/surf': {
                        tags: { amenity: 'shop', 'shop:type': 'surf' },
                        geometry: ['point', 'area']
                    },
                    'man_made/jetty': {
                        tags: { man_made: 'jetty' },
                        geometry: ['point']
                    }
                }
            };

            presets.build(morePresets, false);
            entities.forEach(function (entity) {
                var preset = presets.match(entity, graph);
                expect(preset.visible()).to.be.false;
            });
        });
    });

    describe('expected matches', function () {
        var testPresets = {
            presets: {
                area: { name: 'Area', tags: {}, geometry: ['area'] },
                line: { name: 'Line', tags: {}, geometry: ['line'] },
                point: { name: 'Point', tags: {}, geometry: ['point'] },
                vertex: { name: 'Vertex', tags: {}, geometry: ['vertex'] },
                relation: { name: 'Relation', tags: {}, geometry: ['relation'] },
                building: { name: 'Building', tags: { building: 'yes' }, geometry: ['area'] },
                'type/multipolygon': {
                    name: 'Multipolygon',
                    geometry: ['area', 'relation'],
                    tags: { 'type': 'multipolygon' },
                    searchable: false,
                    matchScore: 0.1
                },
                address: {
                    name: 'Address',
                    geometry: ['point', 'vertex', 'area'],
                    tags: { 'addr:*': '*' },
                    matchScore: 0.15
                },
                'highway/pedestrian_area': {
                    name: 'Pedestrian Area',
                    geometry: ['area'],
                    tags: { highway: 'pedestrian', area: 'yes' }
                }
            }
        };

        it('prefers building to multipolygon', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var relation = iD.osmRelation({ tags: { type: 'multipolygon', building: 'yes' } });
            var graph = iD.coreGraph([relation]);
            expect(presets.match(relation, graph).id).to.eql('building');
        });

        it('prefers building to address', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var way = iD.osmWay({ tags: { area: 'yes', building: 'yes', 'addr:housenumber': '1234' } });
            var graph = iD.coreGraph([way]);
            expect(presets.match(way, graph).id).to.eql('building');
        });

        it('prefers pedestrian to area', function () {
            iD.data.presets = testPresets;
            var presets = iD.coreContext().presets();
            var way = iD.osmWay({ tags: { area: 'yes', highway: 'pedestrian' } });
            var graph = iD.coreGraph([way]);
            expect(presets.match(way, graph).id).to.eql('highway/pedestrian_area');
        });
    });


    describe('#fromExternal', function () {
        var morePresets = {
            presets: {
                '8bc64d6d': {
                    'name': 'Surf Shop',
                    'geometry': ['area', 'point'],
                    'fields': ['2161a712'],
                    'tags': { 'amenity': 'shop', 'shop:type': 'surf' },
                    'matchScore': 0.99
                }
            },
            'fields': {
                '2161a712': {
                    'key': 'building',
                    'label': 'Building',
                    'overrideLabel': 'Building',
                    'type': 'text'
                }
            }
        };

        beforeEach(function () {
            server = sinon.fakeServer.create();
        });

        afterEach(function () {
            server.restore();
        });

        it('builds presets w/external sources set to visible', function () {
            var surfShop = iD.osmNode({ tags: { amenity: 'shop', 'shop:type': 'surf' } });
            var graph = iD.coreGraph([surfShop]);
            var url = 'https://fakemaprules.io/fake.json';

            // no exernal presets yet
            expect(iD.coreContext().presets().match(surfShop, graph).id).to.eql('point');

            // reset graph...
            graph = iD.coreGraph([surfShop]);

            // add the validations query param...
            iD.coreContext().presets().fromExternal(url, function (externalPresets) {
                expect(externalPresets.match(surfShop, graph).id).to.eql('8bc64d6d');
            });

            server.respondWith('GET', /fake\.json/,
                [200, { 'Content-Type': 'application/json' }, JSON.stringify(morePresets)]
            );
            server.respond();
        });

        it('makes only the external presets initially visible', function () {
            var url = 'https://fakemaprules.io/fake.json';

            iD.coreContext().presets().fromExternal(url, function(externalPresets) {
                var external = externalPresets.collection.reduce(function(presets, preset) {
                    if (!preset.hasOwnProperty('members') && preset.visible()) {
                        presets.push(preset.id);
                    }
                    return presets;
                }, []);

                var morePresetKeys = Object.keys(morePresets.presets);
                expect(morePresetKeys.length).to.eql(external.length);

                morePresetKeys.forEach(function(presetID) {
                    expect(external.indexOf(presetID)).to.be.at.least(0);
                });
            });

            server.respondWith('GET', /fake\.json/,
                [200, { 'Content-Type': 'application/json' }, JSON.stringify(morePresets)]
            );
            server.respond();
        });
    });

});