from django.core.files.uploadedfile import SimpleUploadedFile
from django.urls import reverse
from rest_framework.test import APITestCase

from apps.account.models import ProfessorUser
from apps.course.models import Course, CourseCategory, CourseLesson, Lesson


class TestProfessorAPI(APITestCase):
    def setUp(self):
        self.professor = ProfessorUser.objects.create(
            email='professor@example.com',
            fullname='استاد نمونه',
            experience_years=7,
        )
        self.category = CourseCategory.objects.create(name='General', slug='general')
        thumbnail = SimpleUploadedFile('thumb.jpg', b'filecontent', content_type='image/jpeg')
        self.course = Course.objects.create(
            title='Test Course',
            slug='test-course',
            category=self.category,
            professor=self.professor,
            thumbnail=thumbnail,
            video_type=Course.VedioTypeChoices.YOUTUBE_LINK,
            video_link='https://example.com/video',
            is_online=True,
            online_link='https://example.com/classroom',
            level=Course.LevelChoices.BEGINNER,
            duration=10,
            lessons_count=1,
            description='Sample description',
            short_description='Short description',
            status=Course.StatusChoices.ONGOING,
            is_free=True,
        )
        lesson = Lesson.objects.create(
            title='Lesson 1',
            content_type=Lesson.ContentTypeChoices.VIDEO_FILE,
            duration=5,
        )
        CourseLesson.objects.create(course=self.course, lesson=lesson, priority=1, is_active=True)
        self.professor.refresh_from_db()

    def test_professor_list_api(self):
        url = reverse('course-professor-list')
        response = self.client.get(url)
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.data['count'], 1)
        item = response.data['results'][0]
        self.assertEqual(item['slug'], self.professor.slug)
        self.assertEqual(item['fullname'], self.professor.fullname)
        self.assertEqual(item['experience_years'], 7)
        self.assertEqual(item['course_count'], 1)
        self.assertEqual(item['lesson_count'], 1)

    def test_professor_detail_api(self):
        url = reverse('course-professor-detail', kwargs={'slug': self.professor.slug})
        response = self.client.get(url)
        self.assertEqual(response.status_code, 200)
        data = response.data
        self.assertEqual(data['slug'], self.professor.slug)
        self.assertEqual(data['fullname'], self.professor.fullname)
        self.assertEqual(data['experience_years'], 7)
        self.assertEqual(data['course_count'], 1)
        self.assertEqual(data['lesson_count'], 1)

    def test_professor_courses_api(self):
        url = reverse('course-professor-course-list', kwargs={'slug': self.professor.slug})
        response = self.client.get(url)
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.data['count'], 1)
        course_data = response.data['results'][0]
        self.assertEqual(course_data['id'], self.course.id)
        self.assertEqual(course_data['title'], self.course.title)

    def test_professor_slug_generated_without_fullname(self):
        professor = ProfessorUser.objects.create(
            email='slugless@example.com',
            fullname='',
        )
        self.assertTrue(professor.slug)

    def test_course_creation_promotes_professor_user(self):
        professor = ProfessorUser.objects.create(
            email='pending@example.com',
            fullname='کاربر موقت',
        )
        professor.user_type = ProfessorUser.UserType.CLIENT
        professor.slug = None
        professor.save(update_fields=['user_type', 'slug'])

        thumbnail = SimpleUploadedFile('thumb2.jpg', b'filecontent', content_type='image/jpeg')
        Course.objects.create(
            title='Auto Promote Course',
            slug='auto-promote-course',
            category=self.category,
            professor=professor,
            thumbnail=thumbnail,
            video_type=Course.VedioTypeChoices.YOUTUBE_LINK,
            video_link='https://example.com/video2',
            is_online=False,
            level=Course.LevelChoices.BEGINNER,
            duration=5,
            lessons_count=0,
            description='Test',
            short_description='Test',
            status=Course.StatusChoices.REGISTERING,
            is_free=True,
        )

        professor.refresh_from_db()
        self.assertEqual(professor.user_type, ProfessorUser.UserType.PROFESSOR)
        self.assertTrue(professor.slug)