const EmailEventStorage = require('../lib/email-event-storage');
const {EmailDeliveredEvent, EmailOpenedEvent, EmailBouncedEvent, EmailTemporaryBouncedEvent, EmailUnsubscribedEvent, SpamComplaintEvent} = require('@tryghost/email-events');
const sinon = require('sinon');
const assert = require('assert');

function stubDb() {
    const db = {
        knex: function () {
            return this;
        },
        where: function () {
            return this;
        },
        whereNull: function () {
            return this;
        },
        update: sinon.stub().resolves()
    };
    db.knex.raw = function () {
        return this;
    };
    return db;
}

describe('Email event storage', function () {
    describe('Constructor', function () {
        it('doesn\'t throw', function () {
            new EmailEventStorage({});
        });
    });

    it('Handles email delivered events', async function () {
        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailDeliveredEvent) {
                    handler(EmailDeliveredEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456',
                        emailRecipientId: '789'
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const db = stubDb();
        const eventHandler = new EmailEventStorage({db});
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        sinon.assert.calledOnce(db.update);
        assert(!!db.update.firstCall.args[0].delivered_at);
    });

    it('Handles email opened events', async function () {
        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailOpenedEvent) {
                    handler(EmailOpenedEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456',
                        emailRecipientId: '789'
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const db = stubDb();
        const eventHandler = new EmailEventStorage({db});
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        sinon.assert.calledOnce(db.update);
        assert(!!db.update.firstCall.args[0].opened_at);
    });

    it('Handles email permanent bounce events with update', async function () {
        let waitPromise;

        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailBouncedEvent) {
                    waitPromise = handler(EmailBouncedEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456',
                        emailRecipientId: '789',
                        error: {
                            message: 'test',
                            code: 500,
                            enhancedCode: '5.5.5'
                        }
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const db = stubDb();
        const existing = {
            id: 1,
            get: (key) => {
                if (key === 'severity') {
                    return 'temporary';
                }
                if (key === 'failed_at') {
                    return new Date(-5);
                }
            },
            save: sinon.stub().resolves()
        };
        const EmailRecipientFailure = {
            transaction: async function (callback) {
                return await callback(1);
            },
            findOne: sinon.stub().resolves(existing)
        };

        const eventHandler = new EmailEventStorage({
            db,
            models: {
                EmailRecipientFailure
            }
        });
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        await waitPromise;
        sinon.assert.calledOnce(db.update);
        assert(!!db.update.firstCall.args[0].failed_at);
        assert(existing.save.calledOnce);
    });

    it('Handles email permanent bounce events with insert', async function () {
        let waitPromise;

        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailBouncedEvent) {
                    waitPromise = handler(EmailBouncedEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456',
                        emailRecipientId: '789',
                        error: {
                            message: 'test',
                            code: 500,
                            enhancedCode: '5.5.5'
                        }
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const db = stubDb();
        const EmailRecipientFailure = {
            transaction: async function (callback) {
                return await callback(1);
            },
            findOne: sinon.stub().resolves(undefined),
            add: sinon.stub().resolves()
        };

        const eventHandler = new EmailEventStorage({
            db,
            models: {
                EmailRecipientFailure
            }
        });
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        await waitPromise;
        sinon.assert.calledOnce(db.update);
        assert(!!db.update.firstCall.args[0].failed_at);
        assert(EmailRecipientFailure.add.calledOnce);
    });

    it('Handles email permanent bounce events with skipped update', async function () {
        let waitPromise;

        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailBouncedEvent) {
                    waitPromise = handler(EmailBouncedEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456',
                        emailRecipientId: '789',
                        error: {
                            message: 'test',
                            code: 500,
                            enhancedCode: '5.5.5'
                        }
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const db = stubDb();
        const existing = {
            id: 1,
            get: (key) => {
                if (key === 'severity') {
                    return 'permanent';
                }
                if (key === 'failed_at') {
                    return new Date(-5);
                }
            },
            save: sinon.stub().resolves()
        };
        const EmailRecipientFailure = {
            transaction: async function (callback) {
                return await callback(1);
            },
            findOne: sinon.stub().resolves(existing)
        };

        const eventHandler = new EmailEventStorage({
            db,
            models: {
                EmailRecipientFailure
            }
        });
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        await waitPromise;
        sinon.assert.calledOnce(db.update);
        assert(!!db.update.firstCall.args[0].failed_at);
        assert(EmailRecipientFailure.findOne.called);
        assert(!existing.save.called);
    });

    it('Handles email temporary bounce events with update', async function () {
        let waitPromise;

        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailTemporaryBouncedEvent) {
                    waitPromise = handler(EmailTemporaryBouncedEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456',
                        emailRecipientId: '789',
                        error: {
                            message: 'test',
                            code: 500,
                            enhancedCode: '5.5.5'
                        }
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const existing = {
            id: 1,
            get: (key) => {
                if (key === 'severity') {
                    return 'temporary';
                }
                if (key === 'failed_at') {
                    return new Date(-5);
                }
            },
            save: sinon.stub().resolves()
        };
        const EmailRecipientFailure = {
            transaction: async function (callback) {
                return await callback(1);
            },
            findOne: sinon.stub().resolves(existing)
        };

        const eventHandler = new EmailEventStorage({
            models: {
                EmailRecipientFailure
            }
        });
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        await waitPromise;
        assert(existing.save.calledOnce);
    });

    it('Handles unsubscribe', async function () {
        let waitPromise;

        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === EmailUnsubscribedEvent) {
                    waitPromise = handler(EmailUnsubscribedEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456'
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const update = sinon.stub().resolves();

        const eventHandler = new EmailEventStorage({
            membersRepository: {
                update
            }
        });
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        await waitPromise;
        assert(update.calledOnce);
        assert(update.firstCall.args[0].newsletters.length === 0);
    });

    it('Handles complaints', async function () {
        let waitPromise;

        const DomainEvents = {
            subscribe: async (type, handler) => {
                if (type === SpamComplaintEvent) {
                    waitPromise = handler(SpamComplaintEvent.create({
                        email: 'example@example.com',
                        memberId: '123',
                        emailId: '456'
                    }, new Date(0)));
                }
            }
        };

        const subscribeSpy = sinon.spy(DomainEvents, 'subscribe');
        const EmailSpamComplaintEvent = {
            add: sinon.stub().resolves()
        };

        const eventHandler = new EmailEventStorage({
            models: {
                EmailSpamComplaintEvent
            }
        });
        eventHandler.listen(DomainEvents);
        sinon.assert.callCount(subscribeSpy, 6);
        await waitPromise;
        assert(EmailSpamComplaintEvent.add.calledOnce);
    });
});