const assert = require('assert');
const sinon = require('sinon');
const nock = require('nock');
const path = require('path');
const loggingLib = require('@tryghost/logging');
const ExternalMediaInliner = require('../index');

describe('ExternalMediaInliner', function () {
    let logging;
    let GIF1x1;
    let postModelStub;
    let postMetaModelStub;
    let tagModelStub;
    let userModelStub;

    beforeEach(function () {
        // use a 1x1 gif in nock responses because it's really small and easy to work with
        GIF1x1 = Buffer.from('R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==', 'base64');
        logging = {
            info: sinon.stub(loggingLib, 'info'),
            error: sinon.stub(loggingLib, 'error'),
            warn: sinon.stub(loggingLib, 'warn')
        };

        postModelStub = {
            findPage: sinon.stub().resolves({
                data: []
            }),
            edit: sinon.stub().resolves()
        };
        postMetaModelStub = {
            findPage: sinon.stub().resolves({
                data: []
            }),
            edit: sinon.stub().resolves()
        };
        tagModelStub = {
            findPage: sinon.stub().resolves({
                data: []
            }),
            edit: sinon.stub().resolves()
        };
        userModelStub = {
            findPage: sinon.stub().resolves({
                data: []
            }),
            edit: sinon.stub().resolves()
        };
    });

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

    it('Creates an External Media Inliner instance', function () {
        assert.ok(new ExternalMediaInliner({}));
    });

    describe('inline', function () {
        it('inlines image in the post\'s mobiledoc content', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/image.jpg')
                .reply(200, GIF1x1);

            const postModelInstanceStub = {
                id: 'inlined-post-id',
                get: sinon.stub()
                    .withArgs('mobiledoc')
                    .returns(`{"version":"0.3.1","atoms":[],"cards":[["image",{"src":"${imageURL}"}]]}`)
            };
            postModelStub = {
                findPage: sinon.stub().returns({
                    data: [postModelInstanceStub]
                }),
                edit: sinon.stub().resolves()
            };

            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-image.jpg')
                .returns('unique-image.jpg');
            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-image.jpg',
                    saveRaw: () => '/content/images/unique-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(postModelStub.edit.calledOnce);
            assert.ok(postModelStub.edit.calledWith({
                mobiledoc: '{"version":"0.3.1","atoms":[],"cards":[["image",{"src":"__GHOST_URL__/content/images/unique-image.jpg"}]]}'
            }, {
                id: 'inlined-post-id',
                context: {
                    internal: true
                }
            }));
        });

        it('inlines the image from post\'s mobiledoc containing html card', async function () {
            const imageURL = 'https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/39719fcb-5af0-4764-bf8b-d375f37a09e5_1141x860';
            const requestMock = nock('https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com')
                .get('/public/images/39719fcb-5af0-4764-bf8b-d375f37a09e5_1141x860')
                .reply(200, GIF1x1);

            const postModelInstanceStub = {
                id: 'inlined-post-with-htmlcard-id',
                get: sinon.stub()
                    .withArgs('mobiledoc')
                    .returns(`{"version":"0.3.1","atoms":[],"cards":[["html",{"html":"<img src="${imageURL}" alt="Lorem ipsum">"}]],"markups":[],"sections":[[10,0],[1,"p",[]]],"ghostVersion":"4.0"}`)
            };

            postModelStub = {
                findPage: sinon.stub().returns({
                    data: [postModelInstanceStub]
                }),
                edit: sinon.stub().resolves()
            };

            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-image.jpg')
                .returns('unique-image.jpg');
            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-image.jpg',
                    saveRaw: () => '/content/images/unique-image.jpg'
                })
            });

            await inliner.inline(['https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com']);

            assert.ok(requestMock.isDone());
            assert.ok(postModelStub.edit.calledOnce);
            assert.deepEqual(postModelStub.edit.args[0][0], {
                mobiledoc: `{"version":"0.3.1","atoms":[],"cards":[["html",{"html":"<img src="__GHOST_URL__/content/images/unique-image.jpg" alt="Lorem ipsum">"}]],"markups":[],"sections":[[10,0],[1,"p",[]]],"ghostVersion":"4.0"}`
            });
            assert.deepEqual(postModelStub.edit.args[0][1], {
                id: 'inlined-post-with-htmlcard-id',
                context: {
                    internal: true
                }
            });
        });

        it('logs an error when fetching an external media fails', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/image.jpg')
                .reply(404);
            const postModelInstanceStub = {
                id: 'inlined-post-id',
                get: sinon.stub()
                    .withArgs('mobiledoc')
                    .returns(`{"version":"0.3.1","atoms":[],"cards":[["image",{"src":"${imageURL}"}]]}`)
            };

            postModelStub = {
                findPage: sinon.stub().returns({
                    data: [postModelInstanceStub]
                })
            };

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.equal(logging.error.args[0][0], 'Error downloading remote media: https://img.stockfresh.com/files/f/image.jpg');
        });

        it('logs an error when fetching an external media for simple fields fails', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/simple-image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/simple-image.jpg')
                .reply(500);
            const userModelInstanceStub = {
                id: 'inlined-user-id',
                get: sinon.stub()
                    .withArgs('profile_image')
                    .returns(imageURL)
            };

            userModelStub = {
                findPage: sinon.stub().returns({
                    data: [userModelInstanceStub]
                })
            };

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.equal(logging.error.args[0][0], 'Error downloading remote media: https://img.stockfresh.com/files/f/simple-image.jpg');
        });

        it('logs a warning when no suitable storage adapter found for inlined media extension', async function () {
            const fileURL = 'https://img.stockfresh.com/files/f/inlined.exe';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/inlined.exe')
                .reply(200, GIF1x1);

            const postModelInstanceStub = {
                id: 'inlined-post-id',
                get: sinon.stub()
                    .withArgs('mobiledoc')
                    .returns(`{"version":"0.3.1","atoms":[],"cards":[["image",{"src":"${fileURL}"}]]}`)
            };
            postModelStub = {
                findPage: sinon.stub().returns({
                    data: [postModelInstanceStub]
                }),
                edit: sinon.stub().resolves()
            };
            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.exe').returns(null)
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(logging.warn.calledOnce);
            assert.equal(logging.warn.args[0][0], 'No storage adapter found for file extension: .exe');
        });

        it('logs an error when handling post inlining throws an error', async function (){
            const imageURL = 'https://img.stockfresh.com/files/f/image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/image.jpg')
                .reply(200, GIF1x1);

            postModelStub = {
                id: 'errored-post-id',
                get: sinon.stub()
                    .withArgs('mobiledoc')
                    .returns(`{"version":"0.3.1","atoms":[],"cards":[["image",{"src":"${imageURL}"}]]}`)
            };
            postModelStub = {
                findPage: sinon.stub().returns({
                    data: [postModelStub]
                }),
                edit: sinon.stub().throws(new Error('Error saving the post'))
            };
            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-image.jpg')
                .returns('unique-image.jpg');

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-image.jpg',
                    saveRaw: () => '/content/images/unique-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(postModelStub.edit.calledOnce);
            assert.equal(logging.error.args[0][0], 'Error inlining media for post: errored-post-id');
        });

        it('logs an error when handling tag simple fields inlining throws an error', async function (){
            const imageURL = 'https://img.stockfresh.com/files/f/simple-image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/simple-image.jpg')
                .reply(200, GIF1x1);

            const getMethodStub = sinon.stub();
            getMethodStub.withArgs('feature_image').returns(imageURL);
            getMethodStub.withArgs('og_image').returns(null);
            getMethodStub.withArgs('twitter_image').returns(null);

            const tagModelInstanceStub = {
                id: 'errored-tag-id',
                get: getMethodStub
            };
            tagModelStub.findPage = sinon.stub().returns({
                data: [tagModelInstanceStub]
            });
            tagModelStub.edit = sinon.stub().throws(new Error('Error saving the tag'));
            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-image.jpg')
                .returns('unique-image.jpg');

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-image.jpg',
                    saveRaw: () => '/content/images/unique-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(tagModelStub.edit.calledOnce);
            assert.equal(logging.error.args[0][0], 'Error inlining media for: errored-tag-id');
        });

        it('inlines image in the post\'s feature_image field', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/posts_feature_image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/posts_feature_image.jpg')
                .reply(200, GIF1x1);

            postModelStub = {
                id: 'inlined-post-id',
                get: sinon.stub()
                    .withArgs('feature_image')
                    .returns(imageURL)
            };
            const postModelMock = {
                findPage: sinon.stub().returns({
                    data: [postModelStub]
                }),
                edit: sinon.stub().resolves()
            };
            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-feature-image.jpg')
                .returns('unique-feature-image.jpg');

            const inliner = new ExternalMediaInliner({
                PostModel: postModelMock,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-feature-image.jpg',
                    saveRaw: () => '/content/images/unique-feature-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(postModelMock.edit.calledOnce);
            assert.ok(postModelMock.edit.calledWith({
                feature_image: '__GHOST_URL__/content/images/unique-feature-image.jpg'
            }, {
                id: 'inlined-post-id',
                context: {
                    internal: true
                }
            }));
        });

        it('inlines og_image image in posts_meta table', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/posts_meta_image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/posts_meta_image.jpg')
                .reply(200, GIF1x1);

            const getMethodStub = sinon.stub();
            getMethodStub.withArgs('og_image').returns(imageURL);
            getMethodStub.withArgs('twitter_image').returns(null);
            const postsMetaModelInstanceStub = {
                id: 'inlined-post-meta-id',
                get: getMethodStub
            };

            postMetaModelStub.findPage = sinon.stub().resolves({
                data: [postsMetaModelInstanceStub]
            });
            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-feature-image.jpg')
                .returns('unique-feature-image.jpg');

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-posts-meta-image.jpg',
                    saveRaw: () => '/content/images/unique-posts-meta-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(postMetaModelStub.edit.calledOnce);
            assert.deepEqual(postMetaModelStub.edit.args[0][0], {
                og_image: '__GHOST_URL__/content/images/unique-posts-meta-image.jpg'
            });
            assert.deepEqual(postMetaModelStub.edit.args[0][1], {
                id: 'inlined-post-meta-id',
                context: {
                    internal: true
                }
            });
        });

        it('inlines twitter_image image in tags table', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/tag_twitter_image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/tag_twitter_image.jpg')
                .reply(200, GIF1x1);

            const getMethodStub = sinon.stub();
            getMethodStub.withArgs('twitter_image').returns(imageURL);
            getMethodStub.returns(null);
            const tagModelInstanceStub = {
                id: 'inlined-tag-id',
                get: getMethodStub
            };

            tagModelStub.findPage = sinon.stub().resolves({
                data: [tagModelInstanceStub]
            });
            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/unique-tag-twitter-image.jpg')
                .returns('unique-tag-twitter-image.jpg');

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/unique-tag-twitter-image.jpg',
                    saveRaw: () => '/content/images/unique-tag-twitter-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(tagModelStub.edit.calledOnce);
            assert.deepEqual(tagModelStub.edit.args[0][0], {
                twitter_image: '__GHOST_URL__/content/images/unique-tag-twitter-image.jpg'
            });
            assert.deepEqual(tagModelStub.edit.args[0][1], {
                id: 'inlined-tag-id',
                context: {
                    internal: true
                }
            });
        });

        it('inlines cover_image image in users table', async function () {
            const imageURL = 'https://img.stockfresh.com/files/f/user_cover_image.jpg';
            const requestMock = nock('https://img.stockfresh.com')
                .get('/files/f/user_cover_image.jpg')
                .reply(200, GIF1x1);

            const getMethodStub = sinon.stub();
            getMethodStub.withArgs('cover_image').returns(imageURL);
            getMethodStub.returns(null);
            const userModelInstanceStub = {
                id: 'inlined-user-id',
                get: getMethodStub
            };

            userModelStub.findPage = sinon.stub().resolves({
                data: [userModelInstanceStub]
            });
            sinon.stub(path, 'relative')
                .withArgs('/content/images', '/content/images/user-cover-image.jpg')
                .returns('user-cover-image.jpg');

            const inliner = new ExternalMediaInliner({
                PostModel: postModelStub,
                PostMetaModel: postMetaModelStub,
                TagModel: tagModelStub,
                UserModel: userModelStub,
                getMediaStorage: sinon.stub().withArgs('.jpg').returns({
                    getTargetDir: () => '/content/images',
                    getUniqueFileName: () => '/content/images/user-cover-image.jpg',
                    saveRaw: () => '/content/images/user-cover-image.jpg'
                })
            });

            await inliner.inline(['https://img.stockfresh.com']);

            assert.ok(requestMock.isDone());
            assert.ok(userModelStub.edit.calledOnce);
            assert.deepEqual(userModelStub.edit.args[0][0], {
                cover_image: '__GHOST_URL__/content/images/user-cover-image.jpg'
            });
            assert.deepEqual(userModelStub.edit.args[0][1], {
                id: 'inlined-user-id',
                context: {
                    internal: true
                }
            });
        });
    });
});