package board_test

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

	"codeflow.dananglin.me.uk/apollo/canal/internal/board"
	bolt "go.etcd.io/bbolt"
)

func TestCardLifecycle(t *testing.T) {
	t.Parallel()

	projectDir, err := projectRoot()
	if err != nil {
		t.Fatalf(err.Error())
	}

	testDBPath := filepath.Join(projectDir, "test", "databases", "Board_TestCardLifecycle.db")
	os.Remove(testDBPath)

	db, err := board.OpenProject(testDBPath)
	if err != nil {
		t.Fatalf("Unable to open the test database %s, %s.", testDBPath, err)
	}

	defer func() {
		_ = db.Close()
	}()

	initialCardTitle := "A test card."
	initialCardContent := "Ensure that this card is safely stored in the database."
	expectedCardID := 1

	testCreateCard(t, db, initialCardTitle, initialCardContent, expectedCardID)
	testReadCard(t, db, expectedCardID, initialCardTitle, initialCardContent)

	modifiedCardTitle := "Test card updated."
	modifiedCardContent1 := "Ensure that this card is safely updated in the database."

	testUpdateCard(t, db, expectedCardID, modifiedCardTitle, modifiedCardContent1)

	modifiedCardContent2 := "Updated card content only."

	testUpdateCardContent(t, db, expectedCardID, modifiedCardTitle, modifiedCardContent2)
}

func testCreateCard(t *testing.T, db *bolt.DB, title, content string, wantID int) {
	t.Helper()

	if err := board.CreateCard(db, title, content); err != nil {
		t.Fatalf("Unable to create the test card, %s.", err)
	}

	statusList, err := board.ReadStatusList(db)
	if err != nil {
		t.Fatalf("Unable to run `ReadStatusList`, %s.", err)
	}

	if len(statusList) == 0 {
		t.Fatal("The status list appears to be empty.")
	}

	cardIDs := statusList[0].CardIds

	if len(cardIDs) != 1 {
		t.Fatalf("Unexpected number of cards in the default status, want: %d, got %d.", 1, len(cardIDs))
	}

	if gotID := cardIDs[0]; wantID != gotID {
		t.Errorf("Unexpected card ID found in the default status, want: %d, got %d.", wantID, gotID)
	} else {
		t.Logf("Expected card ID found in the default status, got %d.", gotID)
	}
}

func testReadCard(t *testing.T, db *bolt.DB, cardID int, wantTitle, wantContent string) {
	t.Helper()

	card, err := board.ReadCard(db, cardID)
	if err != nil {
		t.Fatalf("Unable to read test card, %s.", err)
	}

	if card.Title != wantTitle {
		t.Errorf("Unexpected card title received, want: %s, got: %s.", wantTitle, card.Title)
	} else {
		t.Logf("Expected card title received, got: %s.", card.Title)
	}

	if card.Content != wantContent {
		t.Errorf("Unexpected card content received, want: %s, got: %s.", wantContent, card.Content)
	} else {
		t.Logf("Expected card title received, got: %s.", card.Content)
	}
}

func testUpdateCard(t *testing.T, db *bolt.DB, cardID int, newTitle, newContent string) {
	t.Helper()

	if err := board.UpdateCard(db, cardID, newTitle, newContent); err != nil {
		t.Fatalf("Unable to update the test card, %s", err)
	}

	got, err := board.ReadCard(db, cardID)
	if err != nil {
		t.Fatalf("Unable to read the modified test card, %s", err)
	}

	want := board.Card{
		ID:      cardID,
		Title:   newTitle,
		Content: newContent,
	}

	if !reflect.DeepEqual(got, want) {
		t.Errorf("Unexpected card read from the database: want %+v, got %+v", want, got)
	} else {
		t.Logf("Expected card read from the database: got %+v", got)
	}
}

func testUpdateCardContent(t *testing.T, db *bolt.DB, cardID int, expectedTitle, newContent string) {
	t.Helper()

	if err := board.UpdateCard(db, cardID, "", newContent); err != nil {
		t.Fatalf("Unable to update the test card, %s", err)
	}

	got, err := board.ReadCard(db, cardID)
	if err != nil {
		t.Fatalf("Unable to read the modified test card, %s", err)
	}

	want := board.Card{
		ID:      cardID,
		Title:   expectedTitle,
		Content: newContent,
	}

	if !reflect.DeepEqual(got, want) {
		t.Errorf("Unexpected card read from the database, want: %+v, got: %+v", want, got)
	} else {
		t.Logf("Expected card read from the database, got: %+v", got)
	}
}

func projectRoot() (string, error) {
	cwd, err := os.Getwd()
	if err != nil {
		return "", fmt.Errorf("unable to get the current working directory, %w", err)
	}

	return filepath.Join(cwd, "..", ".."), nil
}