const sinon = require('sinon');
const ObjectId = require('bson-objectid').default;
const _ = require('lodash');
const moment = require('moment');
const assert = require('node:assert/strict');
const testUtils = require('../../../../utils');
const urlUtils = require('../../../../../core/shared/url-utils');
const IndexGenerator = require('../../../../../core/frontend/services/sitemap/site-map-index-generator');
const PostGenerator = require('../../../../../core/frontend/services/sitemap/post-map-generator');
const PageGenerator = require('../../../../../core/frontend/services/sitemap/page-map-generator');
const TagGenerator = require('../../../../../core/frontend/services/sitemap/tags-map-generator');
const UserGenerator = require('../../../../../core/frontend/services/sitemap/user-map-generator');

describe('Generators', function () {
    let generator;

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

    it('max node setting results in the right number of nodes', function () {
        generator = new PostGenerator({maxPerPage: 5});

        for (let i = 0; i < 10; i++) {
            generator.addUrl(`http://my-ghost-blog.com/episode-${i}/`, testUtils.DataGenerator.forKnex.createPost({
                created_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 200,
                updated_at: null,
                published_at: null,
                slug: `episode-${i}`
            }));
        }

        generator.getXml();

        // We end up with 10 nodes
        assert.equal(Object.keys(generator.nodeLookup).length, 10);

        // But only 5 are output in the xml
        assert.equal(generator.siteMapContent.get(1).match(/<loc>/g).length, 5);
    });

    it('default is 50k', function () {
        generator = new PostGenerator();
        assert.equal(generator.maxPerPage, 50000);
    });

    describe('IndexGenerator', function () {
        beforeEach(function () {
            generator = new IndexGenerator({
                types: {
                    posts: new PostGenerator(),
                    pages: new PageGenerator(),
                    tags: new TagGenerator(),
                    authors: new UserGenerator()
                },
                maxPerPage: 5
            });
        });

        describe('fn: getXml', function () {
            it('default', function () {
                generator.types.posts.addUrl('http://my-ghost-blog.com/episode-1/', {id: 'identifier1', staticRoute: true});
                generator.types.pages.addUrl('http://my-ghost-blog.com/home/', {id: 'identifier1', staticRoute: true});
                generator.types.tags.addUrl('http://my-ghost-blog.com/home/', {id: 'identifier1', staticRoute: true});
                generator.types.authors.addUrl('http://my-ghost-blog.com/home/', {id: 'identifier1', staticRoute: true});

                const xml = generator.getXml();

                assert.match(xml, /sitemap-tags.xml/);
                assert.match(xml, /sitemap-posts.xml/);
                assert.match(xml, /sitemap-pages.xml/);
                assert.match(xml, /sitemap-authors.xml/);
            });

            it('does not create entries for pages with no content', function () {
                generator.types.tags.addUrl('http://my-ghost-blog.com/episode-1/', {id: 'identifier1', staticRoute: true});

                const xml = generator.getXml();

                assert.match(xml, /sitemap-tags.xml/);
                assert.doesNotMatch(xml, /sitemap-posts.xml/);
                assert.doesNotMatch(xml, /sitemap-pages.xml/);
                assert.doesNotMatch(xml, /sitemap-authors.xml/);
            });

            it('creates multiple pages when there are too many posts', function () {
                for (let i = 0; i < 10; i++) {
                    generator.types.posts.addUrl(`http://my-ghost-blog.com/episode-${i}/`, testUtils.DataGenerator.forKnex.createPost({
                        created_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 200,
                        updated_at: null,
                        published_at: null,
                        slug: `episode-${i}`
                    }));
                }
                const xml = generator.getXml();

                assert.match(xml, /sitemap-posts.xml/);
                assert.match(xml, /sitemap-posts-2.xml/);
            });
        });
    });

    describe('PostGenerator', function () {
        beforeEach(function () {
            generator = new PostGenerator();
        });

        describe('fn: createNodeFromDatum', function () {
            it('adds an image:image element if post has a cover image', function () {
                const urlNode = generator.createUrlNodeFromDatum('https://myblog.com/test/', testUtils.DataGenerator.forKnex.createPost({
                    feature_image: 'post-100.jpg',
                    page: false,
                    slug: 'test'
                }));

                assert(Array.isArray(urlNode.url));
                assert.equal(urlNode.url.length, 3);

                /**
                 * A urlNode looks something like:
                 * { url:
                 *   [ { loc: 'http://127.0.0.1:2369/author/' },
                 *     { lastmod: '2014-12-22T11:54:00.100Z' },
                 *     { 'image:image': [
                 *       { 'image:loc': 'post-100.jpg' },
                 *       { 'image:caption': 'post-100.jpg' }
                 *     ] }
                 *  ] }
                 */
                const flatNode = _.extend.apply(_, urlNode.url);
                assert('loc' in flatNode);
                assert('lastmod' in flatNode);
                assert('image:image' in flatNode);
            });
        });

        describe('fn: hasCanonicalUrl', function () {
            it('can check for canonical url', function () {
                const isCanonical = generator.hasCanonicalUrl(testUtils.DataGenerator.forKnex.createPost({
                    page: false,
                    slug: 'some-cool-page',
                    canonical_url: 'https://myblog.com/test/'
                }
                ));
                assert.equal(isCanonical, true);
            });
            it('returns false if no canonical url', function () {
                const isCanonical = generator.hasCanonicalUrl(testUtils.DataGenerator.forKnex.createPost({
                    page: false,
                    slug: 'some-cool-page',
                    canonical_url: null
                }
                ));
                assert.equal(isCanonical, false);
            });
        });

        describe('fn: addUrl', function () {
            it('does not include posts containing canonical_url', function () {
                generator.addUrl('https://myblog.com/test2/', testUtils.DataGenerator.forKnex.createPost({
                    page: false,
                    slug: 'test2',
                    canonical_url: null
                }));
                generator.addUrl('https://myblog.com/test/', testUtils.DataGenerator.forKnex.createPost({
                    page: false,
                    slug: 'test',
                    canonical_url: 'https://external.com/test/'
                }));
                const xml = generator.getXml();
                assert.doesNotMatch(xml, /https:\/\/external.com\/test\//);
            });
        });

        describe('fn: getXml', function () {
            let urlUtilsUrlForStub;

            beforeEach(function () {
                urlUtilsUrlForStub = sinon.stub(urlUtils, 'urlFor');
            });

            it('get cached xml', function () {
                sinon.spy(generator, 'generateXmlFromNodes');
                generator.siteMapContent.set(1, 'something');
                assert.equal(generator.getXml(), 'something');
                generator.siteMapContent.clear();
                sinon.assert.notCalled(generator.generateXmlFromNodes);
            });

            it('compare content output', function () {
                let idxFirst;
                let idxSecond;
                let idxThird;

                urlUtilsUrlForStub.withArgs('image', {image: 'post-100.jpg'}, true).returns('http://my-ghost-blog.com/images/post-100.jpg');
                urlUtilsUrlForStub.withArgs('image', {image: 'post-200.jpg'}, true).returns('http://my-ghost-blog.com/images/post-200.jpg');
                urlUtilsUrlForStub.withArgs('image', {image: 'post-300.jpg'}, true).returns('http://my-ghost-blog.com/images/post-300.jpg');
                urlUtilsUrlForStub.withArgs('sitemap_xsl', true).returns('http://my-ghost-blog.com/sitemap.xsl');

                generator.addUrl('http://my-ghost-blog.com/url/100/', testUtils.DataGenerator.forKnex.createPost({
                    feature_image: 'post-100.jpg',
                    created_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 100,
                    updated_at: null,
                    published_at: null,
                    slug: '100'
                }));

                generator.addUrl('http://my-ghost-blog.com/url/200/', testUtils.DataGenerator.forKnex.createPost({
                    created_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 200,
                    updated_at: null,
                    published_at: null,
                    slug: '200'
                }));

                generator.addUrl('http://my-ghost-blog.com/url/300/', testUtils.DataGenerator.forKnex.createPost({
                    created_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 300,
                    feature_image: 'post-300.jpg',
                    updated_at: null,
                    published_at: null,
                    slug: '300'
                }));

                const xml = generator.getXml();

                assert(xml.includes('<loc>http://my-ghost-blog.com/url/100/</loc>'));
                assert(xml.includes('<loc>http://my-ghost-blog.com/url/200/</loc>'));
                assert(xml.includes('<loc>http://my-ghost-blog.com/url/300/</loc>'));

                assert(xml.includes('<image:loc>http://my-ghost-blog.com/images/post-100.jpg</image:loc>'));
                // This should NOT be present
                assert(!xml.includes('<image:loc>http://my-ghost-blog.com/images/post-200.jpg</image:loc>'));
                assert(xml.includes('<image:loc>http://my-ghost-blog.com/images/post-300.jpg</image:loc>'));

                // Validate order newest to oldest
                idxFirst = xml.indexOf('<loc>http://my-ghost-blog.com/url/300/</loc>');
                idxSecond = xml.indexOf('<loc>http://my-ghost-blog.com/url/200/</loc>');
                idxThird = xml.indexOf('<loc>http://my-ghost-blog.com/url/100/</loc>');

                assert(idxFirst < idxSecond);
                assert(idxSecond < idxThird);
            });

            it('creates multiple pages when there are too many posts', function () {
                generator.maxPerPage = 5;
                urlUtilsUrlForStub.withArgs('sitemap_xsl', true).returns('http://my-ghost-blog.com/sitemap.xsl');
                for (let i = 0; i < 10; i++) {
                    generator.addUrl(`http://my-ghost-blog.com/episode-${i}/`, testUtils.DataGenerator.forKnex.createPost({
                        created_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 200,
                        updated_at: null,
                        published_at: null,
                        slug: `episode-${i}`
                    }));
                }

                const pages = [generator.getXml(), generator.getXml(2)];

                for (let i = 0; i < 10; i++) {
                    const pageIndex = Math.floor(i / 5);
                    assert(pages[pageIndex].includes(`<loc>http://my-ghost-blog.com/episode-${i}/</loc>`));
                }
            });

            it('shouldn\'t break with out of bounds pages', function () {
                assert.equal(generator.getXml(-1), null);
                assert.equal(generator.getXml(99999), null);
                assert.equal(generator.getXml(0), null);
            });
        });

        describe('fn: updateURL', function () {
            it('updates existing url', function () {
                const postDatumToUpdate = testUtils.DataGenerator.forKnex.createPost({
                    updated_at: (Date.UTC(2014, 11, 22, 12) - 360000) + 100
                });

                generator.addUrl('http://my-ghost-blog.com/url/100/', postDatumToUpdate);

                assert.equal(generator.nodeLookup[postDatumToUpdate.id].url[0].loc, 'http://my-ghost-blog.com/url/100/');

                const postWithUpdatedDatum = Object.assign({}, {
                    updated_at: (Date.UTC(2023, 11, 22, 12) - 360000)
                }, postDatumToUpdate);
                const updatedISOString = moment(postWithUpdatedDatum.updated_at).toISOString();
                generator.updateURL(postWithUpdatedDatum);

                assert.equal(generator.nodeLookup[postDatumToUpdate.id].url[0].loc, 'http://my-ghost-blog.com/url/100/');
                assert.equal(generator.nodeLookup[postDatumToUpdate.id].url[1].lastmod, updatedISOString);
            });

            it('does not thrown when trying to update a non-existing url', function () {
                const postDatumToUpdate = testUtils.DataGenerator.forKnex.createPost();
                generator.updateURL(postDatumToUpdate);

                assert.equal(generator.nodeLookup[postDatumToUpdate.id], undefined);
            });
        });

        describe('fn: removeUrl', function () {
            let post;

            beforeEach(function () {
                post = testUtils.DataGenerator.forKnex.createPost();
                generator.nodeLookup[post.id] = 'node';
            });

            afterEach(function () {
                generator.nodeLookup = {};
                generator.nodeTimeLookup = {};
            });

            it('remove none existend url', function () {
                generator.removeUrl('https://myblog.com/blog/podcast/featured/', testUtils.DataGenerator.forKnex.createPost());
                assert.equal(Object.keys(generator.nodeLookup).length, 1);
            });

            it('remove existing url', function () {
                generator.removeUrl('https://myblog.com/blog/test/', post);
                assert.equal(Object.keys(generator.nodeLookup).length, 0);
            });
        });
    });

    describe('PageGenerator', function () {
        beforeEach(function () {
            generator = new PageGenerator();
        });

        describe('fn: getXml', function () {
            it('add', function () {
                generator.addUrl('http://my-ghost-blog.com/home/', {id: 'identifier1', staticRoute: true});
                generator.addUrl('http://my-ghost-blog.com/magic/', {id: 'identifier2', staticRoute: false});
                generator.addUrl('http://my-ghost-blog.com/subscribe/', {id: ObjectId().toHexString(), page: 1});

                generator.getXml();

                assert(generator.siteMapContent.get(1).includes('<loc>http://my-ghost-blog.com/home/</loc>'));
                assert(generator.siteMapContent.get(1).includes('<loc>http://my-ghost-blog.com/magic/</loc>'));
                assert(generator.siteMapContent.get(1).includes('<loc>http://my-ghost-blog.com/subscribe/</loc>'));

                // <loc> should exist exactly one time
                assert.equal(generator.siteMapContent.get(1).match(/<loc>/g).length, 3);
            });
            it('does not include pages containing canonical_url', function () {
                generator.addUrl('https://myblog.com/test2/', testUtils.DataGenerator.forKnex.createPost({
                    page: true,
                    slug: 'test2',
                    canonical_url: null
                }));
                generator.addUrl('https://myblog.com/test/', testUtils.DataGenerator.forKnex.createPost({
                    page: true,
                    slug: 'test',
                    canonical_url: 'https://external.com/test/'
                }));
                const xml = generator.getXml();
                assert.doesNotMatch(xml, /https:\/\/external.com\/test\//);
            });
        });
    });

    describe('UserGenerator', function () {
        beforeEach(function () {
            generator = new UserGenerator();
        });

        describe('fn: validateImageUrl', function () {
            it('image url is localhost', function () {
                assert.equal(generator.validateImageUrl('http://localhost:2368/content/images/1.jpg'), true);
            });

            it('image url is https', function () {
                assert.equal(generator.validateImageUrl('https://myblog.com/content/images/1.png'), true);
            });

            it('image url is external', function () {
                assert.equal(generator.validateImageUrl('https://myblog.com/1.jpg'), true);
            });

            it('no host', function () {
                assert.equal(generator.validateImageUrl('/content/images/1.jpg'), false);
            });
        });
    });
});
