package dynamicarray

import (
	"reflect"
	"testing"
)

func TestDynamicArray(t *testing.T) {
	numbers := DynamicArray{}

	// check numbers is empty or nut
	t.Run("Check Empty Dynamic Array", func(t *testing.T) {
		if numbers.IsEmpty() != true {
			t.Errorf("Expected be true but got %v", numbers.IsEmpty())
		}
	})

	numbers.Add(10)
	numbers.Add(20)
	numbers.Add(30)
	numbers.Add(40)
	numbers.Add(50)

	// check numbers added to our dynamic array
	t.Run("Add Element into Dynamic Array", func(t *testing.T) {
		if numbers.IsEmpty() != false {
			t.Errorf("Expected be false but got %v", numbers.IsEmpty())
		}
		var res []interface{}
		res = append(res, 10)
		res = append(res, 20)
		res = append(res, 30)
		res = append(res, 40)
		res = append(res, 50)

		if !reflect.DeepEqual(numbers.GetData(), res) {
			t.Errorf("Expected be [10, 20, 30, 40, 50] but got %v", numbers.GetData())
		}
	})

	// Remove an Element inside the dynamic array with the index of array
	t.Run("Remove in Dynamic Array", func(t *testing.T) {
		if numbers.IsEmpty() != false {
			t.Errorf("Expected be false but got %v", numbers.IsEmpty())
		}
		var res []interface{}
		res = append(res, 10)
		res = append(res, 30)
		res = append(res, 40)
		res = append(res, 50)

		// remove the element by the index
		err := numbers.Remove(1)

		if err != nil {
			t.Errorf("Expected be [10, 30, 40, 50] but got an Error %v", err)
		}

		if !reflect.DeepEqual(numbers.GetData(), res) {
			t.Errorf("Expected be [10, 30, 40, 50] but got %v", numbers.GetData())
		}
	})

	// get one element by the index of the dynamic array
	t.Run("Get in Dynamic Array", func(t *testing.T) {
		if numbers.IsEmpty() != false {
			t.Errorf("Expected be false but got %v", numbers.IsEmpty())
		}

		// return one element with the index
		getOne, _ := numbers.Get(2)

		if getOne != 40 {
			t.Errorf("Expected be 40 but got %v", getOne)
		}

	})

	// Put to add a value to specific index of Dynamic Array
	t.Run("Put to Dynamic Array", func(t *testing.T) {
		if numbers.IsEmpty() != false {
			t.Errorf("Expected be false but got %v", numbers.IsEmpty())
		}

		// change value of specific index
		err := numbers.Put(0, 100)
		if err != nil {
			t.Errorf("Expected be [10, 30, 40, 50] but got an Error %v", err)
		}

		getOne, _ := numbers.Get(0)
		if getOne != 100 {
			t.Errorf("Expected be 100 but got %v", getOne)
		}
	})

}