package board_test

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

	"codeflow.dananglin.me.uk/apollo/pelican/internal/board"
)

func TestStatusLifecycle(t *testing.T) {
	t.Log("Testing the lifecycle of a status.")

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

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

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

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

	// We've opened a new board with the default list of statuses: To Do, Doing, Done
	statusOnHoldName := "On Hold"
	statusOnHoldExpectedID := 4
	statusOnHoldOrder := 4

	t.Run("Test Create Status", testCreateStatus(kanban, statusOnHoldName, statusOnHoldOrder))

	t.Run("Test Read Status", testReadStatus(kanban, statusOnHoldExpectedID, statusOnHoldName))

	t.Run("Test Status Update", testUpdateStatus(kanban, 2, "In Progress"))
	// Rearrange the board so the order is To Do, On Hold, In Progress, Done
	// Move a Card ID from To Do to In Progress
	t.Run("Test Move Card To Status", testMoveCardToStatus(kanban))
}

func testCreateStatus(kanban board.Board, name string, order int) func(t *testing.T) {
	return func(t *testing.T) {
		t.Log("When the status is created and saved to the database.")

		args := board.StatusArgs{
			Name:  name,
			Order: order,
		}

		if err := kanban.CreateStatus(args); err != nil {
			t.Fatalf("ERROR: Unable to create the new status, %v.", err)
		}

		t.Logf("%s\tStatus '%s' was successfully saved to the database.", success, name)
	}
}

func testReadStatus(kanban board.Board, statusID int, wantName string) func(t *testing.T) {
	return func(t *testing.T) {
		t.Log("When the status is read from the database.")

		status, err := kanban.Status(statusID)
		if err != nil {
			t.Fatalf("ERROR: Unable to read the test status, %v", err)
		}

		if status.Name != wantName {
			t.Errorf("%s\tUnexpected status received from the database, want: '%s', got: '%s'", failure, wantName, status.Name)
		} else {
			t.Logf("%s\tSuccessfully received the '%s' status from the database.", success, status.Name)
		}
	}
}

func testUpdateStatus(kanban board.Board, statusID int, newName string) func(t *testing.T) {
	return func(t *testing.T) {
		t.Log("When the status' name is updated in the database.")

		args := board.UpdateStatusArgs{
			StatusID: statusID,
			StatusArgs: board.StatusArgs{
				Name:  newName,
				Order: -1,
			},
		}
		if err := kanban.UpdateStatus(args); err != nil {
			t.Fatalf("ERROR: Unable to update the status, %v", err)
		} else {
			t.Logf("%s\tStatus successfully updated.", success)
		}

		t.Log("\tVerifying the new status...")

		status, err := kanban.Status(statusID)
		if err != nil {
			t.Fatalf("ERROR: Unable to retrieve the status from the database, %v", err)
		}

		want := board.Status{
			ID:       statusID,
			Name:     newName,
			CardIds:  nil,
			Position: 2,
		}

		if !reflect.DeepEqual(status, want) {
			t.Errorf("%s\tUnexpected status received from the database, want: %+v, got: %+v", failure, want, status)
		} else {
			t.Logf("%s\tExpected status name received from the database, got: %+v", success, status)
		}
	}
}

// func testRearrangeBoard() func(t *testing.T) {
// 	return func(t *testing.T) {
// 	}
// }

func testMoveCardToStatus(kanban board.Board) func(t *testing.T) {
	return func(t *testing.T) {
		t.Log("When moving a card between statuses.")

		title := "Test card."

		cardArgs := board.CardArgs{NewTitle: title, NewDescription: ""}

		cardID, err := kanban.CreateCard(cardArgs)
		if err != nil {
			t.Fatalf("ERROR: Unable to create the card in the database, %v", err)
		}

		statusList, err := kanban.StatusList()
		if err != nil {
			t.Fatalf("ERROR: Unable to retrieve the list of statuses from the database, %v", err)
		}

		status0, status2 := statusList[0], statusList[2]

		moveArgs := board.MoveToStatusArgs{CardID: cardID, CurrentStatusID: status0.ID, NextStatusID: status2.ID}

		if err := kanban.MoveToStatus(moveArgs); err != nil {
			t.Fatalf("ERROR: Unable to move the Card ID from '%s' to '%s', %v", status0.Name, status2.Name, err)
		}

		t.Logf("\tVerifying that the card has moved to '%s'...", status2.Name)

		statusList, err = kanban.StatusList()
		if err != nil {
			t.Fatalf("ERROR: Unable to retrieve the list of statuses from the database, %v", err)
		}

		status0, status2 = statusList[0], statusList[2]

		if len(status0.CardIds) != 0 {
			t.Errorf("%s\tUnexpected number of card IDs found in '%s', want: 0, got: %d", failure, status0.Name, len(status0.CardIds))
		} else {
			t.Logf("%s\tThe number of card IDs in '%s' is now %d", success, status0.Name, len(status0.CardIds))
		}

		if len(status2.CardIds) != 1 {
			t.Errorf("%s\tUnexpected number of card IDs found in '%s', want: 1, got: %d", failure, status2.Name, len(status2.CardIds))
		} else {
			t.Logf("%s\tThe number of card IDs in '%s' is now %d", success, status2.Name, len(status2.CardIds))
		}

		card, err := kanban.Card(status2.CardIds[0])
		if err != nil {
			t.Fatalf("ERROR: Unable to retrieve the card from the database, %v", err)
		}

		if card.Title != title {
			t.Errorf("%s\tUnexpected card title found in '%s', want: '%s', got: '%s'", success, status2.Name, title, card.Title)
		} else {
			t.Logf("%s\tExpected card title found in '%s', got: '%s'", success, status2.Name, card.Title)
		}
	}
}