import {beforeAll, beforeEach, describe, expect, it, Mock, vi} from "vitest";
import {Request, Response} from "express";
import {setupTestApp} from "../setup-tests";
import {NotFoundException} from "../../src/exceptions/not-found-exception";
import {
    createTeacherHandler,
    deleteTeacherHandler,
    getAllTeachersHandler, getStudentJoinRequestHandler, getTeacherClassHandler,
    getTeacherHandler, getTeacherQuestionHandler, getTeacherStudentHandler, updateStudentJoinRequestHandler
} from "../../src/controllers/teachers";
import {BadRequestException} from "../../src/exceptions/bad-request-exception";
import {EntityAlreadyExistsException} from "../../src/exceptions/entity-already-exists-exception";
import {getStudentRequestHandler} from "../../src/controllers/students";

describe('Teacher controllers', () => {
    let req: Partial<Request>;
    let res: Partial<Response>;

    let jsonMock: Mock;
    let statusMock: Mock;

    beforeAll(async () => {
        await setupTestApp();
    });

    beforeEach(() => {
        jsonMock = vi.fn();
        statusMock = vi.fn().mockReturnThis();
        res = {
            json: jsonMock,
            status: statusMock,
        };
    });

    it('Get teacher', async () => {
        req = { params: { username: 'FooFighters' }};

        await getTeacherHandler(req as Request, res as Response);

        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ teacher: expect.anything() }));
    });

    it('Teacher not found', async () => {
        req = {params: {username: 'doesnotexist'}};

        await expect(() => getTeacherHandler(req as Request, res as Response))
            .rejects
            .toThrow(NotFoundException);
    });

    it('No username', async () => {
        req = { params: {} };

        await expect(() => getTeacherHandler(req as Request, res as Response))
            .rejects
            .toThrowError(BadRequestException);
    });

    it('Create and delete teacher', async () => {
        req = {
            body: {
                username: 'coolteacher',
                firstName: 'New',
                lastName: 'Teacher'
            }
        };

        await createTeacherHandler(req as Request, res as Response);

        expect(statusMock).toHaveBeenCalledWith(201);

        req = { params: { username: 'coolteacher' } };

        await deleteTeacherHandler(req as Request, res as Response);

        expect(statusMock).toHaveBeenCalledWith(200);
    });

    it('Create duplicate student', async () => {
        req = {
            body: {
                username: 'FooFighters',
                firstName: 'Dave',
                lastName: 'Grohl',
            }
        };

        await expect(() => createTeacherHandler(req as Request, res as Response))
            .rejects
            .toThrowError(EntityAlreadyExistsException);
    });

    it('Create teacher no body', async () => {
        req = { body: {} };

        await expect(() => createTeacherHandler(req as Request, res as Response))
            .rejects
            .toThrowError(BadRequestException);
    });

    it('Teacher list', async () => {
        req = { query: { full: 'true' } };

        await getAllTeachersHandler(req as Request, res as Response);

        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ teachers: expect.anything() }));

        const result = jsonMock.mock.lastCall?.[0];

        const teacherUsernames = result.teachers.map((s: any) => s.username);
        expect(teacherUsernames).toContain('FooFighters');

        expect(result.teachers).toHaveLength(4);
    });

    it('Deleting non-existent student', async () => {
        req = { params: { username: 'doesnotexist' } };

        await expect(() => deleteTeacherHandler(req as Request, res as Response))
            .rejects
            .toThrow(NotFoundException);
    });


    it('Get teacher classes', async () => {
        req = {
            params: { username: 'FooFighters' },
            query: { full: 'true' },
        };

        await getTeacherClassHandler(req as Request, res as Response);

        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ classes: expect.anything() }));

        const result = jsonMock.mock.lastCall?.[0];
        // console.log('[TEACHER CLASSES]', result);
        expect(result.classes.length).toBeGreaterThan(0);
    });

    it('Get teacher students', async () => {
        req = {
            params: { username: 'FooFighters' },
            query: { full: 'true' },
        };

        await getTeacherStudentHandler(req as Request, res as Response);

        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ students: expect.anything() }));

        const result = jsonMock.mock.lastCall?.[0];
        // console.log('[TEACHER STUDENTS]', result.students);
        expect(result.students.length).toBeGreaterThan(0);
    });

    /*

    it('Get teacher questions', async () => {
        req = {
            params: { username: 'FooFighters' },
            query: { full: 'true' },
        };

        await getTeacherQuestionHandler(req as Request, res as Response);

        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ questions: expect.anything() }));

        const result = jsonMock.mock.lastCall?.[0];
        // console.log('[TEACHER QUESTIONS]', result.questions);
        expect(result.questions.length).toBeGreaterThan(0);

        // TODO fix
    });

     */

    it('Get join requests by class', async () => {
        req = {
            query: { username: 'LimpBizkit' },
            params: { classId: 'id02' },
        };

        await getStudentJoinRequestHandler(req as Request, res as Response);

        expect(jsonMock).toHaveBeenCalledWith(expect.objectContaining({ joinRequests: expect.anything() }));

        const result = jsonMock.mock.lastCall?.[0];
        // console.log('[JOIN REQUESTS FOR CLASS]', result.joinRequests);
        expect(result.joinRequests.length).toBeGreaterThan(0);
    });

    it('Update join request status', async () => {
        req = {
            query: { username: 'LimpBizkit', studentUsername: 'PinkFloyd' },
            params: { classId: 'id02' },
            body: { accepted: 'true' }
        };

        await updateStudentJoinRequestHandler(req as Request, res as Response);

        expect(statusMock).toHaveBeenCalledWith(200);

        req = {
            params: { username: 'PinkFloyd' },
        };

        await getStudentRequestHandler(req as Request, res as Response);

        const result = jsonMock.mock.lastCall?.[0];
        const status = result.requests[0].status
        expect(status).toBeTruthy;
    });




});