import unittest
from app import app

class BlogPostTestCase(unittest.TestCase):
    def setUp(self):
        self.client = app.test_client()
        self.sample_post = {"title": "Test Post", "content": "This is a test post"}

    def test_create_post_success(self):
        response = self.client.post('/api/posts', json=self.sample_post)
        self.assertEqual(response.status_code, 201)

    def test_create_post_missing_field(self):
        response = self.client.post('/api/posts', json={"title": "Only title"})
        self.assertEqual(response.status_code, 400)

    def test_get_all_posts(self):
        self.client.post('/api/posts', json=self.sample_post)
        response = self.client.get('/api/posts')
        self.assertEqual(response.status_code, 200)

    def test_get_single_post_success(self):
        post_resp = self.client.post('/api/posts', json=self.sample_post)
        post_id = post_resp.get_json()['id']
        response = self.client.get(f'/api/posts/{post_id}')
        self.assertEqual(response.status_code, 200)

    def test_get_single_post_not_found(self):
        response = self.client.get('/api/posts/999')
        self.assertEqual(response.status_code, 404)

    def test_update_post_success(self):
        post_resp = self.client.post('/api/posts', json=self.sample_post)
        post_id = post_resp.get_json()['id']
        response = self.client.put(f'/api/posts/{post_id}', json={"title": "Updated"})
        self.assertEqual(response.status_code, 200)

    def test_update_post_not_found(self):
        response = self.client.put('/api/posts/999', json={"title": "Nothing"})
        self.assertEqual(response.status_code, 404)

    def test_delete_post_success(self):
        post_resp = self.client.post('/api/posts', json=self.sample_post)
        post_id = post_resp.get_json()['id']
        response = self.client.delete(f'/api/posts/{post_id}')
        self.assertEqual(response.status_code, 204)

    def test_delete_post_not_found(self):
        response = self.client.delete('/api/posts/999')
        self.assertEqual(response.status_code, 404)

if __name__ == '__main__':
    unittest.main()