package file

import (
	"fmt"
	"os"
	"path/filepath"

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

type quizTestSuite struct {
	prettytest.Suite
}

func (t *quizTestSuite) TestReadAll() {
	store, err := NewDefaultQuizFileStore()
	t.Nil(err)

	if !t.Failed() {
		result := store.ReadAll()

		t.Equal(
			4,
			len(result),
			fmt.Sprintf(
				"The store contains 5 files but only 4 should be parsed (duplicated quiz). Total of parsed quizzes are instead %v",
				len(result),
			),
		)

		files, _ := os.ReadDir(GetDefaultQuizzesDir())
		t.Equal(5, len(files))

		_, err = removeQuizHeader(filepath.Join(store.Dir, "quiz_5.md"))
	}
}

func (t *quizTestSuite) TestCreate() {
	store, err := NewQuizFileStore(
		&FileStoreConfig[*models.Quiz, *store.QuizStore]{
			FilePathConfig:  FilePathConfig{GetDefaultQuizzesDir(), "quiz", ".md"},
			IndexDirFunc:    DefaultQuizIndexDirFunc,
			NoIndexOnCreate: true,
		},
	)
	t.Nil(err)

	if !t.Failed() {
		quiz, err := store.Create(
			&models.Quiz{
				Question: &models.Question{Text: "Newly created question text with #tag1 #tag2."},
				Answers: []*models.Answer{
					{Text: "Answer 1"},
					{Text: "Answer 2"},
					{Text: "Answer 3"},
					{Text: "Answer 4"},
				},
				CorrectPos: 0,
			})
		t.Nil(err)
		t.Equal(2, len(quiz.Tags))

		if !t.Failed() {
			path := store.GetPath(quiz)
			t.True(path != "", "Path should not be empty.")

			exists, err := os.Stat(path)
			t.Nil(err)

			if !t.Failed() {
				t.True(exists != nil, "The new quiz file was not created.")

				if !t.Failed() {
					quizFromDisk, err := readQuizFromDisk(path)
					defer os.Remove(path)

					quizFromDisk.Correct = quiz.Answers[0]
					quizFromDisk.Tags = quiz.Tags

					t.Nil(err)

					if !t.Failed() {
						t.Equal(quizFromDisk.Question.Text, quiz.Question.Text)
						for i, a := range quizFromDisk.Answers {
							t.Equal(a.Text, quiz.Answers[i].Text)
						}
						for i, tag := range quizFromDisk.Tags {
							t.Equal(tag.Name, quiz.Tags[i].Name)
						}
					}
				}
			}

		}
	}
}

func (t *quizTestSuite) TestDelete() {
	store, err := NewQuizFileStore(
		&FileStoreConfig[*models.Quiz, *store.QuizStore]{
			FilePathConfig:  FilePathConfig{GetDefaultQuizzesDir(), "quiz", ".md"},
			IndexDirFunc:    DefaultQuizIndexDirFunc,
			NoIndexOnCreate: true,
		},
	)
	t.Nil(err)

	if !t.Failed() {
		quiz, err := store.Create(
			&models.Quiz{
				Question: &models.Question{Text: "This quiz should be deleted."},
				Answers: []*models.Answer{
					{Text: "Answer 1"},
					{Text: "Answer 2"},
					{Text: "Answer 3"},
					{Text: "Answer 4"},
				},
				CorrectPos: 0,
			})
		t.Nil(err)
		if !t.Failed() {
			path := store.GetPath(quiz)
			_, err := store.Delete(quiz.ID)
			t.Nil(err, fmt.Sprintf("Quiz should be deleted without errors: %v", err))
			if !t.Failed() {
				_, err := os.Stat(path)
				t.Not(t.Nil(err))

			}

		}
	}
}

func (t *quizTestSuite) TestUpdate() {
	store, err := NewQuizFileStore(
		&FileStoreConfig[*models.Quiz, *store.QuizStore]{
			FilePathConfig:  FilePathConfig{GetDefaultQuizzesDir(), "quiz", ".md"},
			IndexDirFunc:    DefaultQuizIndexDirFunc,
			NoIndexOnCreate: true,
		},
	)

	t.Nil(err)

	if !t.Failed() {
		quiz, err := store.Create(
			&models.Quiz{
				Question: &models.Question{Text: "Newly created question text with #tag1 #tag2."},
				Answers: []*models.Answer{
					{Text: "Answer 1"},
					{Text: "Answer 2"},
					{Text: "Answer 3"},
					{Text: "Answer 4"},
				},
				CorrectPos: 0,
			})
		t.Nil(err)

		_, err = store.Update(&models.Quiz{
			Question: &models.Question{Text: "Newly created question text with #tag1 #tag2 #tag3."},
			Answers: []*models.Answer{
				{Text: "Answer 1"},
				{Text: "Answer 2"},
				{Text: "Answer 3"},
				{Text: "Answer 4"},
			},
			CorrectPos: 1,
		}, quiz.ID)

		t.Nil(err)

		updatedQuizFromMemory, err := store.Read(quiz.ID)
		t.Equal(len(updatedQuizFromMemory.Tags), 3)
		t.Equal("Answer 2", updatedQuizFromMemory.Correct.Text)

		defer os.Remove(store.GetPath(quiz))

	}
}

func (t *quizTestSuite) TestAutowriteHeader() {
	store, err := NewDefaultQuizFileStore()
	t.Nil(err)

	if !t.Failed() {
		meta, err := readQuizHeader(filepath.Join(store.Dir, "quiz_5.md"))
		t.Nil(err)
		if !t.Failed() {
			t.Not(t.Nil(meta))

			if !t.Failed() {
				t.True(meta.ID != "", "ID should not be empty")

				if !t.Failed() {
					_, err = removeQuizHeader(filepath.Join(store.Dir, "quiz_5.md"))
					t.True(err == nil)
				}
			}
		}
	}
}

func readQuizFromDisk(path string) (*models.Quiz, error) {
	content, err := os.ReadFile(path)
	if err != nil {
		return nil, err
	}

	result := new(models.Quiz)

	err = result.Unmarshal(content)
	if err != nil {
		return nil, err
	}

	return result, nil
}