# retoor <retoor@molodetz.nl>

import json
import unittest

from app import app


class TestCalculatorAPI(unittest.TestCase):

    def setUp(self) -> None:
        self.client = app.test_client()

    def test_add_success(self) -> None:
        response = self.client.get('/add?left=3&right=5')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json, {'result': 8})

    def test_add_missing_param_returns_400(self) -> None:
        response = self.client.get('/add?left=3')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_add_invalid_type_returns_400(self) -> None:
        response = self.client.get('/add?left=abc&right=5')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_subtract_success(self) -> None:
        response = self.client.get('/subtract?left=10&right=3')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json, {'result': 7})

    def test_subtract_missing_param_returns_400(self) -> None:
        response = self.client.get('/subtract?right=3')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_subtract_invalid_type_returns_400(self) -> None:
        response = self.client.get('/subtract?left=10&right=xyz')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_clamp_success(self) -> None:
        response = self.client.get('/clamp?value=5&low=0&high=10')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json, {'result': 5})

    def test_clamp_value_below_low_returns_low(self) -> None:
        response = self.client.get('/clamp?value=-5&low=0&high=10')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json, {'result': 0})

    def test_clamp_missing_param_returns_400(self) -> None:
        response = self.client.get('/clamp?value=5&low=0')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_clamp_invalid_type_returns_400(self) -> None:
        response = self.client.get('/clamp?value=abc&low=0&high=10')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_clamp_low_greater_than_high_returns_400(self) -> None:
        response = self.client.get('/clamp?value=5&low=10&high=0')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_clamp_to_byte_success(self) -> None:
        response = self.client.get('/clamp_to_byte?value=100')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json, {'result': 100})

    def test_clamp_to_byte_above_255_returns_255(self) -> None:
        response = self.client.get('/clamp_to_byte?value=300')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json, {'result': 255})

    def test_clamp_to_byte_missing_param_returns_400(self) -> None:
        response = self.client.get('/clamp_to_byte')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)

    def test_clamp_to_byte_invalid_type_returns_400(self) -> None:
        response = self.client.get('/clamp_to_byte?value=abc')
        self.assertEqual(response.status_code, 400)
        self.assertIn('error', response.json)