import config from "config";

import Model from "../src/db/Model.js";
import ModelFactory from "../src/db/ModelFactory.js";
import {ManyThroughModelRelation, OneModelRelation} from "../src/db/ModelRelation.js";
import MysqlConnectionManager from "../src/db/MysqlConnectionManager.js";
import {ValidationBag} from "../src/db/Validator.js";
import {logger} from "../src/Logger.js";
import {MIGRATIONS} from "../src/TestApp.js";

class FakeDummyModel extends Model {
    public id?: number = undefined;
    public name?: string = undefined;
    public date?: Date = undefined;
    public date_default?: Date = undefined;

    protected init(): void {
        this.setValidation('name').acceptUndefined().between(3, 256);
    }
}

class Post extends Model {
    public id?: number = undefined;
    public author_id?: number = undefined;
    public content?: string = undefined;

    public readonly author = new OneModelRelation(this, Author, {
        localKey: 'author_id',
        foreignKey: 'id',
    });

    protected init(): void {
        this.setValidation('author_id').defined().exists(Author, 'id');
    }
}

class Author extends Model {
    public id?: number = undefined;
    public name?: string = undefined;

    public readonly roles = new ManyThroughModelRelation(this, Role, {
        localKey: 'id',
        foreignKey: 'id',
        pivotTable: 'author_role',
        localPivotKey: 'author_id',
        foreignPivotKey: 'role_id',
    });
}

class Role extends Model {
    public id?: number = undefined;
    public name?: string = undefined;

    public readonly permissions = new ManyThroughModelRelation(this, Permission, {
        localKey: 'id',
        foreignKey: 'id',
        pivotTable: 'role_permission',
        localPivotKey: 'role_id',
        foreignPivotKey: 'permission_id',
    });
}

class Permission extends Model {
    public id?: number = undefined;
    public name?: string = undefined;
}

class AuthorRole extends Model {
    public static get table(): string {
        return 'author_role';
    }

    public author_id?: number = undefined;
    public role_id?: number = undefined;

    protected init(): void {
        this.setValidation('author_id').defined().exists(Author, 'id');
        this.setValidation('role_id').defined().exists(Role, 'id');
    }
}

class RolePermission extends Model {
    public static get table(): string {
        return 'role_permission';
    }

    public role_id?: number = undefined;
    public permission_id?: number = undefined;

    protected init(): void {
        this.setValidation('role_id').defined().exists(Role, 'id');
        this.setValidation('permission_id').defined().exists(Permission, 'id');
    }
}

let fakeDummyModelModelFactory: ModelFactory<FakeDummyModel>;

let postFactory: ModelFactory<Post>;
let authorFactory: ModelFactory<Author>;
let roleFactory: ModelFactory<Role>;
let permissionFactory: ModelFactory<Permission>;

beforeAll(async () => {
    await MysqlConnectionManager.prepare();
    await MysqlConnectionManager.query('DROP DATABASE IF EXISTS ' + config.get<string>('mysql.database'));
    await MysqlConnectionManager.endPool();

    logger.setSettings({minLevel: "trace"});
    MysqlConnectionManager.registerMigrations(MIGRATIONS);
    ModelFactory.register(FakeDummyModel);
    ModelFactory.register(Post);
    ModelFactory.register(Author);
    ModelFactory.register(Role);
    ModelFactory.register(Permission);
    ModelFactory.register(AuthorRole);
    ModelFactory.register(RolePermission);
    await MysqlConnectionManager.prepare();

    // Create FakeDummyModel table
    fakeDummyModelModelFactory = ModelFactory.get(FakeDummyModel);
    postFactory = ModelFactory.get(Post);
    authorFactory = ModelFactory.get(Author);
    roleFactory = ModelFactory.get(Role);
    permissionFactory = ModelFactory.get(Permission);

    await MysqlConnectionManager.query(`DROP TABLE IF EXISTS author_role`);
    await MysqlConnectionManager.query(`DROP TABLE IF EXISTS role_permission`);
    for (const factory of [
        fakeDummyModelModelFactory,
        postFactory,
        authorFactory,
        roleFactory,
        permissionFactory,
    ]) {
        await MysqlConnectionManager.query(`DROP TABLE IF EXISTS ${factory.table}`);
    }

    await MysqlConnectionManager.query(`CREATE TABLE ${fakeDummyModelModelFactory.table}(
            id INT NOT NULL AUTO_INCREMENT,
            name VARCHAR(256),
            date DATETIME,
            date_default DATETIME DEFAULT NOW(),
            PRIMARY KEY(id)
        )`);

    await MysqlConnectionManager.query(`CREATE TABLE ${authorFactory.table}(
            id INT NOT NULL AUTO_INCREMENT,
            name VARCHAR(64),
            PRIMARY KEY(id)
        )`);
    await MysqlConnectionManager.query(`CREATE TABLE ${postFactory.table}(
            id INT NOT NULL AUTO_INCREMENT,
            author_id INT NOT NULL,
            content VARCHAR(512),
            PRIMARY KEY(id),
            FOREIGN KEY post_author_fk (author_id) REFERENCES ${authorFactory.table} (id)
        )`);
    await MysqlConnectionManager.query(`CREATE TABLE ${roleFactory.table}(
            id INT NOT NULL AUTO_INCREMENT,
            name VARCHAR(64),
            PRIMARY KEY(id)
        )`);
    await MysqlConnectionManager.query(`CREATE TABLE ${permissionFactory.table}(
            id INT NOT NULL AUTO_INCREMENT,
            name VARCHAR(64),
            PRIMARY KEY(id)
        )`);

    await MysqlConnectionManager.query(`CREATE TABLE author_role(
            id INT NOT NULL AUTO_INCREMENT,
            author_id INT NOT NULL,
            role_id INT NOT NULL,
            PRIMARY KEY(id),
            FOREIGN KEY author_role_author_fk (author_id) REFERENCES ${authorFactory.table} (id),
            FOREIGN KEY author_role_role_fk (role_id) REFERENCES ${roleFactory.table} (id)
        )`);
    await MysqlConnectionManager.query(`CREATE TABLE role_permission(
            id INT NOT NULL AUTO_INCREMENT,
            role_id INT NOT NULL,
            permission_id INT NOT NULL,
            PRIMARY KEY(id),
            FOREIGN KEY role_permission_role_fk (role_id) REFERENCES ${roleFactory.table} (id),
            FOREIGN KEY role_permission_permission_fk (permission_id) REFERENCES ${permissionFactory.table} (id)
        )`);


    /// SEED ///

    // permissions
    createPostPermission = Permission.create({name: 'create-post'});
    await createPostPermission.save();

    moderatePostPermission = Permission.create({name: 'moderate-post'});
    await moderatePostPermission.save();

    viewLogsPermission = Permission.create({name: 'view-logs'});
    await viewLogsPermission.save();


    // roles
    guestRole = Role.create({name: 'guest'});
    await guestRole.save();
    await RolePermission.create({role_id: guestRole.id, permission_id: createPostPermission.id}).save();

    moderatorRole = Role.create({name: 'moderator'});
    await moderatorRole.save();
    await RolePermission.create({role_id: moderatorRole.id, permission_id: createPostPermission.id}).save();
    await RolePermission.create({role_id: moderatorRole.id, permission_id: moderatePostPermission.id}).save();

    adminRole = Role.create({name: 'admin'});
    await adminRole.save();
    await RolePermission.create({role_id: adminRole.id, permission_id: createPostPermission.id}).save();
    await RolePermission.create({role_id: adminRole.id, permission_id: moderatePostPermission.id}).save();
    await RolePermission.create({role_id: adminRole.id, permission_id: viewLogsPermission.id}).save();


    // authors
    glimmerAuthor = Author.create({name: 'glimmer'});
    await glimmerAuthor.save();
    await AuthorRole.create({author_id: glimmerAuthor.id, role_id: guestRole.id}).save();

    bowAuthor = Author.create({name: 'bow'});
    await bowAuthor.save();
    await AuthorRole.create({author_id: bowAuthor.id, role_id: moderatorRole.id}).save();

    adoraAuthor = Author.create({name: 'adora'});
    await adoraAuthor.save();
    await AuthorRole.create({author_id: adoraAuthor.id, role_id: adminRole.id}).save();


    // posts
    post1 = Post.create({author_id: glimmerAuthor.id, content: 'I\'m the queen now and you\'ll do as I order.'});
    await post1.save();

    post2 = Post.create({author_id: adoraAuthor.id, content: 'But you\'re wrong!'});
    await post2.save();

    post3 = Post.create({author_id: bowAuthor.id, content: 'Come on guys, let\'s talk this through.'});
    await post3.save();
});

afterAll(async () => {
    await MysqlConnectionManager.endPool();
});

describe('Model', () => {
    it('should construct properly', () => {
        const date = new Date(888);
        const model = fakeDummyModelModelFactory.create({
            name: 'a_name',
            date: date,
            non_existing_property: 'dropped_value',
        }, true);

        expect(model.id).toBeUndefined();
        expect(model.name).toBe('a_name');
        expect(model.date).toBe(date);
        expect(model.date_default).toBeUndefined();
        expect(model.non_existing_property).toBeUndefined();
    });

    it('should have a proper table name', () => {
        expect(fakeDummyModelModelFactory.table).toBe('fake_dummy_models');
        expect(FakeDummyModel.table).toBe('fake_dummy_models');
        expect(FakeDummyModel.create({}).table).toBe('fake_dummy_models');
    });

    it('should insert properly', async () => {
        const date = new Date(569985);
        const insertInstance: FakeDummyModel | null = fakeDummyModelModelFactory.create({
            name: 'name1',
            date: date,
        }, true);


        // Insert
        expect(insertInstance.exists()).toBeFalsy();
        await insertInstance.save();
        expect(insertInstance.exists()).toBeTruthy();

        expect(insertInstance.id).toBe(1); // Auto id from insert
        expect(insertInstance.name).toBe('name1');
        expect(insertInstance.date?.getTime()).toBeCloseTo(date.getTime(), -4);
        expect(insertInstance.date_default).toBeDefined();

        // Check that row exists in DB
        const retrievedInstance = await FakeDummyModel.getById(1);
        expect(retrievedInstance).toBeDefined();
        expect(retrievedInstance?.id).toBe(1);
        expect(retrievedInstance?.name).toBe('name1');
        expect(retrievedInstance?.date?.getTime()).toBeCloseTo(date.getTime(), -4);
        expect(retrievedInstance?.date_default).toBeDefined();

        const failingInsertModel = fakeDummyModelModelFactory.create({
            name: 'a',
        }, true);
        await expect(failingInsertModel.save()).rejects.toBeInstanceOf(ValidationBag);
    });

    it('should update properly', async () => {
        const insertModel = fakeDummyModelModelFactory.create({
            name: 'update',
        }, true);
        await insertModel.save();

        const preUpdatedModel = await FakeDummyModel.getById(insertModel.id);
        expect(preUpdatedModel).not.toBeNull();
        expect(preUpdatedModel?.name).toBe(insertModel.name);

        // Update model
        if (preUpdatedModel) {
            preUpdatedModel.name = 'updated_name';
            await preUpdatedModel.save();
        }

        const postUpdatedModel = await FakeDummyModel.getById(insertModel.id);
        expect(postUpdatedModel).not.toBeNull();
        expect(postUpdatedModel?.id).toBe(insertModel.id);
        expect(postUpdatedModel?.name).not.toBe(insertModel.name);
        expect(postUpdatedModel?.name).toBe(preUpdatedModel?.name);
    });

    it('should delete properly', async () => {
        const insertModel = fakeDummyModelModelFactory.create({
            name: 'delete',
        }, true);
        await insertModel.save();

        const preDeleteModel = await FakeDummyModel.getById(insertModel.id);
        expect(preDeleteModel).not.toBeNull();

        await preDeleteModel?.delete();

        const postDeleteModel = await FakeDummyModel.getById(insertModel.id);
        expect(postDeleteModel).toBeNull();
    });
});

let createPostPermission: Permission;
let moderatePostPermission: Permission;
let viewLogsPermission: Permission;
let guestRole: Role;
let moderatorRole: Role;
let adminRole: Role;
let glimmerAuthor: Author;
let bowAuthor: Author;
let adoraAuthor: Author;
let post1: Post;
let post2: Post;
let post3: Post;

describe('ModelRelation', () => {
    test('Query and check relations', async () => {
        const posts = await Post.select()
            .with('author.roles.permissions')
            .sortBy('id', 'ASC')
            .get();

        expect(posts.length).toBe(3);

        async function testPost(
            post: Post,
            originalPost: Post,
            expectedAuthor: Author,
            expectedRoles: Role[],
            expectedPermissions: Permission[],
        ) {
            console.log('Testing post', post);
            expect(post.id).toBe(originalPost.id);
            expect(post.content).toBe(originalPost.content);

            const actualAuthor = await post.author.get();
            expect(actualAuthor).not.toBeNull();
            expect(await post.author.has(expectedAuthor)).toBeTruthy();
            expect(actualAuthor?.equals(expectedAuthor)).toBe(true);

            const authorRoles = await actualAuthor?.roles.get() || [];
            console.log('Roles:');
            expect(authorRoles.map(r => r.id)).toStrictEqual(expectedRoles.map(r => r.id));

            const authorPermissions = (await Promise.all(authorRoles.map(async r => await r.permissions.get())))
                .flatMap(p => p);
            console.log('Permissions:');
            expect(authorPermissions.map(p => p.id)).toStrictEqual(expectedPermissions.map(p => p.id));
        }

        await testPost(posts[0], post1, glimmerAuthor,
            [guestRole],
            [createPostPermission]);
        await testPost(posts[1], post2, adoraAuthor,
            [adminRole],
            [createPostPermission, moderatePostPermission, viewLogsPermission]);
        await testPost(posts[2], post3, bowAuthor,
            [moderatorRole],
            [createPostPermission, moderatePostPermission]);
    });
});