const assert = require('node:assert/strict');
const {assertExists} = require('../../../../utils/assertions');
const sinon = require('sinon');
const _ = require('lodash');
const testUtils = require('../../../../utils');
const configUtils = require('../../../../utils/config-utils');
const routerManager = require('../../../../../core/frontend/services/routing').routerManager;
const generateFeed = require('../../../../../core/frontend/services/rss/generate-feed');

describe('RSS: Generate Feed', function () {
    const data = {};
    let baseUrl;
    let routerManagerGetUrlForResourceStub;

    // Static set of posts
    let posts;

    before(function () {
        posts = _.cloneDeep(testUtils.DataGenerator.forKnex.posts);

        posts = _.filter(posts, function filter(post) {
            return post.status === 'published' && post.type === 'post';
        });

        posts[2].meta_description = 'test stuffs';

        _.each(posts, function (post) {
            post.url = '/' + post.slug + '/';
            post.primary_author = {name: 'Joe Bloggs'};

            // data is from fixtures that are inserted directly into the database via knex
            // that means it has raw __GHOST_URL__ values that would typically be modified by the model layer
            // we're not using the model layer here so we need to transform manually
            Object.entries(post).forEach(([key, value]) => {
                if (value && typeof value === 'string') {
                    post[key] = value.replace(/__GHOST_URL__/g, 'http://my-ghost-blog.com');
                }
            });
        });
    });

    afterEach(async function () {
        sinon.restore();
        await configUtils.restore();
    });

    beforeEach(function () {
        routerManagerGetUrlForResourceStub = sinon.stub(routerManager, 'getUrlForResource');

        baseUrl = '/rss/';

        data.safeVersion = '0.6';
        data.title = 'Test Title';
        data.description = 'Testing Desc';
        data.meta = {pagination: {pages: 1}};
    });

    describe('without subdirectory', function () {
        beforeEach(function () {
            configUtils.set({url: 'http://my-ghost-blog.com'});
        });

        it('should get the RSS tags correct', async function () {
            data.posts = [];

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // xml & rss tags
            assert.match(xmlData, /^<\?xml version="1.0" encoding="UTF-8"\?>/);
            assert.match(xmlData, /<rss/);
            assert.match(xmlData, /xmlns:dc="http:\/\/purl.org\/dc\/elements\/1.1\/"/);
            assert.match(xmlData, /xmlns:content="http:\/\/purl.org\/rss\/1.0\/modules\/content\/"/);
            assert.match(xmlData, /xmlns:atom="http:\/\/www.w3.org\/2005\/Atom"/);
            assert.match(xmlData, /version="2.0"/);
            assert.match(xmlData, /xmlns:media="http:\/\/search.yahoo.com\/mrss\/"/);

            // channel tags
            assert.match(xmlData, /<channel><title><!\[CDATA\[Test Title\]\]><\/title>/);
            assert.match(xmlData, /<description><!\[CDATA\[Testing Desc\]\]><\/description>/);
            assert.match(xmlData, /<link>http:\/\/my-ghost-blog.com\/<\/link>/);
            assert.match(xmlData, /<image><url>http:\/\/my-ghost-blog.com\/favicon.png<\/url><title>Test Title<\/title><link>http:\/\/my-ghost-blog.com\/<\/link><\/image>/);
            assert.match(xmlData, /<generator>Ghost 0.6<\/generator>/);
            assert.match(xmlData, /<lastBuildDate>.*?<\/lastBuildDate>/);
            assert.match(xmlData, /<atom:link href="http:\/\/my-ghost-blog.com\/rss\/" rel="self"/);
            assert.match(xmlData, /type="application\/rss\+xml"\/><ttl>60<\/ttl>/);
            assert.match(xmlData, /<\/channel><\/rss>$/);
        });

        it('should get the item tags correct', async function () {
            data.posts = posts;

            _.each(data.posts, function (post) {
                routerManagerGetUrlForResourceStub.withArgs(sinon.match({id: post.id}), {absolute: true}).returns('http://my-ghost-blog.com/' + post.slug + '/');
            });

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // item tags
            assert.match(xmlData, /<item><title><!\[CDATA\[HTML Ipsum\]\]><\/title>/);
            assert.match(xmlData, /<description><!\[CDATA\[<h1>HTML Ipsum Presents<\/h1>/);
            assert.match(xmlData, /<link>http:\/\/my-ghost-blog.com\/html-ipsum\/<\/link>/);
            assert.match(xmlData, /<image><url>http:\/\/my-ghost-blog.com\/favicon.png<\/url><title>Test Title<\/title><link>http:\/\/my-ghost-blog.com\/<\/link><\/image>/);
            assert.match(xmlData, /<guid isPermaLink="false">/);
            assert.match(xmlData, /<\/guid><dc:creator><!\[CDATA\[Joe Bloggs\]\]><\/dc:creator>/);
            assert.match(xmlData, /<pubDate>Thu, 01 Jan 2015/);
            assert.match(xmlData, /<content:encoded><!\[CDATA\[<h1>HTML Ipsum Presents<\/h1>/);
            assert.match(xmlData, /<\/code><\/pre>\]\]><\/content:encoded><\/item>/);
            assert.doesNotMatch(xmlData, /<author>/);

            // basic structure check
            const postEnd = '<\/code><\/pre>\]\]><\/content:encoded>';
            const firstIndex = xmlData.indexOf(postEnd);

            // The first title should be before the first content
            assert(xmlData.indexOf('HTML Ipsum') < firstIndex);
            // The second title should be after the first content
            assert(xmlData.indexOf('Ghostly Kitchen Sink') > firstIndex);
        });

        it('should only return visible tags', async function () {
            const postWithTags = posts[2];
            postWithTags.tags = [
                {name: 'public', visibility: 'public'},
                {name: 'internal', visibility: 'internal'},
                {name: 'visibility'}
            ];

            data.posts = [postWithTags];

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);
            // item tags
            assert.match(xmlData, /<title><!\[CDATA\[Short and Sweet\]\]>/);
            assert.match(xmlData, /<description><!\[CDATA\[test stuff/);
            assert.match(xmlData, /<content:encoded><!\[CDATA\[<!--kg-card-begin: markdown--><h2 id="testing">testing<\/h2>\n/);
            assert.match(xmlData, /<img src="http:\/\/placekitten.com\/500\/200"/);
            assert.match(xmlData, /<media:content url="http:\/\/placekitten.com\/500\/200" medium="image"\/>/);
            assert.match(xmlData, /<category><!\[CDATA\[public\]\]/);
            assert.match(xmlData, /<category><!\[CDATA\[visibility\]\]/);
            assert.doesNotMatch(xmlData, /<category><!\[CDATA\[internal\]\]/);
        });

        it('should not error if author is somehow not present', async function () {
            data.posts = [_.omit(posts[2], 'primary_author')];

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // special/optional tags
            assert.match(xmlData, /<title><!\[CDATA\[Short and Sweet\]\]>/);
            assert.match(xmlData, /<description><!\[CDATA\[test stuff/);
            assert.match(xmlData, /<content:encoded><!\[CDATA\[<!--kg-card-begin: markdown--><h2 id="testing">testing<\/h2>\n/);
            assert.match(xmlData, /<img src="http:\/\/placekitten.com\/500\/200"/);
            assert.match(xmlData, /<media:content url="http:\/\/placekitten.com\/500\/200" medium="image"\/>/);
            assert.doesNotMatch(xmlData, /<dc:creator>/);
        });

        it('should not error if post content is null', async function () {
            data.posts = [Object.assign({}, posts[2], {html: null})];

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // special/optional tags
            assert.match(xmlData, /<title><!\[CDATA\[Short and Sweet\]\]>/);
            assert.match(xmlData, /<description><!\[CDATA\[test stuff/);
            assert.match(xmlData, /<content:encoded\/>/);
            assert.match(xmlData, /<media:content url="http:\/\/placekitten.com\/500\/200" medium="image"\/>/);
            assert.match(xmlData, /<dc:creator>/);
        });

        it('should use meta_description and image where available', async function () {
            data.posts = [posts[2]];

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // special/optional tags
            assert.match(xmlData, /<title><!\[CDATA\[Short and Sweet\]\]>/);
            assert.match(xmlData, /<description><!\[CDATA\[test stuff/);
            assert.match(xmlData, /<content:encoded><!\[CDATA\[<!--kg-card-begin: markdown--><h2 id="testing">testing<\/h2>\n/);
            assert.match(xmlData, /<img src="http:\/\/placekitten.com\/500\/200"/);
            assert.match(xmlData, /<media:content url="http:\/\/placekitten.com\/500\/200" medium="image"\/>/);
        });

        it('should use excerpt when no meta_description is set', async function () {
            data.posts = [posts[0]];

            _.each(data.posts, function (post) {
                routerManagerGetUrlForResourceStub.withArgs(sinon.match({id: post.id}), {absolute: true}).returns('http://my-ghost-blog.com/' + post.slug + '/');
            });

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // special/optional tags
            assert.match(xmlData, /<title><!\[CDATA\[HTML Ipsum\]\]>/);
            assert.match(xmlData, /<description><!\[CDATA\[This is my custom excerpt!/);
        });

        it('should process urls correctly', async function () {
            data.posts = [posts[3]];

            const xmlData = await generateFeed(baseUrl, data);
            assertExists(xmlData);

            // anchor URL - <a href="#nowhere" title="Anchor URL">
            assert.match(xmlData, /<a href="#nowhere" title="Anchor URL">/);

            // relative URL - <a href="/about#nowhere" title="Relative URL">
            assert.match(xmlData, /<a href="http:\/\/my-ghost-blog.com\/about#nowhere" title="Relative URL">/);

            // protocol relative URL - <a href="//somewhere.com\/link#nowhere" title="Protocol Relative URL">
            assert.match(xmlData, /<a href="\/\/somewhere.com\/link#nowhere" title="Protocol Relative URL">/);

            // absolute URL - <a href="http:\/\/somewhere.com\/link#nowhere" title="Absolute URL">
            assert.match(xmlData, /<a href="http:\/\/somewhere.com\/link#nowhere" title="Absolute URL">/);
        });
    });
});
