package sub

import (
	"reflect"
	"testing"
)

func TestSplitLinkLines(t *testing.T) {
	cases := []struct {
		name string
		in   string
		want []string
	}{
		{"single_line", "vless://abc", []string{"vless://abc"}},
		{"two_lines", "vless://abc\nvmess://xyz", []string{"vless://abc", "vmess://xyz"}},
		{"trims_each_line", "  vless://abc  \n\tvmess://xyz\t", []string{"vless://abc", "vmess://xyz"}},
		{"skips_blank_lines", "vless://abc\n\n\nvmess://xyz\n", []string{"vless://abc", "vmess://xyz"}},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			got := splitLinkLines(c.in)
			if !reflect.DeepEqual(got, c.want) {
				t.Fatalf("splitLinkLines(%q) = %#v, want %#v", c.in, got, c.want)
			}
		})
	}
}

func TestSplitLinkLines_EmptyInputIsNil(t *testing.T) {
	if got := splitLinkLines(""); got != nil {
		t.Fatalf("splitLinkLines(\"\") = %#v, want nil", got)
	}
}

func TestSplitLinkLines_WhitespaceOnlyHasNoEntries(t *testing.T) {
	got := splitLinkLines("   \n\t  \n")
	if len(got) != 0 {
		t.Fatalf("splitLinkLines(whitespace) = %#v, want empty slice", got)
	}
}