package main

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/http/httptest"
	"reflect"
	"strings"
	"testing"

	"git.andreafazzi.eu/andrea/probo/client"
	"git.andreafazzi.eu/andrea/probo/logger"
	"git.andreafazzi.eu/andrea/probo/models"
	"github.com/remogatto/prettytest"
)

type testSuite struct {
	prettytest.Suite
}

type StubTestHubCollectorStore struct {
	tests []*models.Quiz
}

func (store *StubTestHubCollectorStore) CreateQuiz(test *client.CreateUpdateQuizRequest) (*models.Quiz, error) {
	return nil, nil
}

func (store *StubTestHubCollectorStore) UpdateQuiz(quiz *client.CreateUpdateQuizRequest, id string) (*models.Quiz, error) {
	store.tests[0].Question.Text = quiz.Question.Text

	return store.tests[0], nil
}

func (store *StubTestHubCollectorStore) ReadAllQuizzes() ([]*models.Quiz, error) {
	return store.tests, nil
}

func TestRunner(t *testing.T) {
	prettytest.Run(
		t,
		new(testSuite),
		new(integrationTestSuite),
	)
}

func (t *testSuite) BeforeAll() {
	logger.SetLevel(logger.Disabled)
}

func (t *testSuite) TestReadAllQuizzes() {
	expectedResult := &client.ReadAllQuizResponse{
		BaseResponse: client.BaseResponse{Status: "success"},
		Content: []*models.Quiz{
			{
				Question: &models.Question{ID: "1", Text: "Question 1"},
				Answers:  []*models.Answer{{}, {}, {}},
			},
		},
	}

	store := &StubTestHubCollectorStore{[]*models.Quiz{
		{
			Question: &models.Question{ID: "1", Text: "Question 1"},
			Answers:  []*models.Answer{{}, {}, {}},
		},
	}}

	server := NewProboCollectorServer(store)

	request, _ := http.NewRequest(http.MethodGet, "/quizzes", nil)
	response := httptest.NewRecorder()

	server.ServeHTTP(response, request)

	result := getResponse(response.Body)

	t.Equal("application/json", response.Header().Get("Content-Type"))
	t.True(testsAreEqual(result, expectedResult))

	t.Equal(http.StatusOK, response.Code)
}

func (t *testSuite) TestUpdateQuiz() {
	expectedResponse := &client.UpdateQuizResponse{
		BaseResponse: client.BaseResponse{Status: "success"},
		Content: &models.Quiz{
			Question: &models.Question{ID: "1", Text: "Updated Question 1"},
			Answers:  []*models.Answer{{}, {}, {}},
		},
	}

	store := &StubTestHubCollectorStore{[]*models.Quiz{
		{
			Question: &models.Question{ID: "1", Text: "Question 1"},
			Answers:  []*models.Answer{{}, {}, {}},
		},
	}}

	server := NewProboCollectorServer(store)

	payload := `
{
  "question": {"text": "Updated Question 1"},
  "answers": [
    {"text": "Text of the answer 1", "correct": true},
    {"text": "Text of the answer 2"},
    {"text": "Text of the answer 3"},
    {"text": "Text of the answer 4"}
  ]
}
`
	request, _ := http.NewRequest(http.MethodPut, "/quizzes/update/1", strings.NewReader(payload))
	response := httptest.NewRecorder()

	server.ServeHTTP(response, request)

	result, err := decodeUpdateQuizResponse(response.Body)

	t.True(err == nil, fmt.Sprintf("Response should be decoded without errors: %v", err))

	if !t.Failed() {
		t.True(result.Status == expectedResponse.Status)
		t.True(reflect.DeepEqual(result, expectedResponse))
		t.Equal("application/json", response.Header().Get("Content-Type"))
		t.Equal(http.StatusAccepted, response.Code)
	}
}

func getResponse(body io.Reader) (response *client.ReadAllQuizResponse) {
	err := json.NewDecoder(body).Decode(&response)
	if err != nil {
		panic(fmt.Errorf("Unable to parse response from server %q: %v", body, err))
	}

	return
}

func decodeUpdateQuizResponse(body io.Reader) (response *client.UpdateQuizResponse, err error) {
	err = json.NewDecoder(body).Decode(&response)
	if err != nil {
		return nil, fmt.Errorf("Unable to parse the response %q from the server: %v", body, err)
	}
	return
}

func testsAreEqual(got, want *client.ReadAllQuizResponse) bool {
	return reflect.DeepEqual(got, want)
}