package lseq

import (
	"testing"
)

func TestStringEncoding(t *testing.T) {
	// Basic sanity checks for encoding/decoding
	cases := []struct {
		numbers []uint64
		want    string
	}{
		{[]uint64{0}, "-"},
		{[]uint64{63}, "z"},
		{[]uint64{0, 1}, "--0"},
		{[]uint64{0, 4095}, "-zz"},
	}

	for _, tc := range cases {
		got := numbersToID(tc.numbers)
		if got != tc.want {
			t.Errorf("numbersToID(%v) = %q, want %q", tc.numbers, got, tc.want)
		}

		parsed, err := idToNumbers(got)
		if err != nil {
			t.Errorf("idToNumbers(%q) failed: %v", got, err)
			continue
		}

		if len(parsed) != len(tc.numbers) {
			t.Errorf("Roundtrip failed: got %v, want %v", parsed, tc.numbers)
		}
	}
}

func TestPositionToKey(t *testing.T) {
	if got := PositionToKey(2, 1); got != "--0" {
		t.Errorf("PositionToKey(2, 1) = %q, want %q", got, "--0")
	}
	if got := PositionToKey(1, 1); got != "0" {
		t.Errorf("PositionToKey(1, 1) = %q, want %q", got, "0")
	}
}