package mdb

import (
	"fmt"
	"reflect"
)

func (bt *BTreeIndex[T]) Equals(rhs *BTreeIndex[T]) error {
	if bt.Len() != rhs.Len() {
		return fmt.Errorf("Expected %d items, but found %d.", bt.Len(), rhs.Len())
	}

	it1 := bt.Ascend()
	defer it1.Close()

	it2 := rhs.Ascend()
	defer it2.Close()

	for it1.Next() {
		it2.Next()

		v1 := it1.Value()
		v2 := it2.Value()

		if !reflect.DeepEqual(v1, v2) {
			return fmt.Errorf("Value mismatch: %v != %v", v1, v2)
		}
	}

	return nil
}

func (bt *BTreeIndex[T]) EqualsList(data []*T) error {
	if bt.Len() != len(data) {
		return fmt.Errorf("Expected %d items, but found %d.", bt.Len(), len(data))
	}

	it1 := bt.Ascend()
	defer it1.Close()

	for _, v1 := range data {
		it1.Next()
		v2 := it1.Value()

		if !reflect.DeepEqual(v1, v2) {
			return fmt.Errorf("Value mismatch: %v != %v", v1, v2)
		}
	}

	return nil
}