package keys

import (
	"errors"
	"strings"
	"testing"
)

func TestNamesEscapeIntoKeyPartsAndBack(t *testing.T) {
	for _, c := range []struct{ name, esc string }{
		{"fix/1.2", "fix/1=2e2"}, {"a.b", "a=2eb"}, {"a=b", "a=3db"}, {"a+b", "a=2bb"}, {"plain-name_1/x", "plain-name_1/x"},
		{"fix/ü", "fix/=c3=bc"}, {"x y", "x=20y"},
	} {
		esc := EscapeName(c.name)
		if esc != c.esc || strings.ContainsAny(esc, ".+ ") {
			t.Errorf("escape of %q = %q, want %q", c.name, esc, c.esc)
		}
		if back, err := UnescapeName(esc); err != nil || back != c.name {
			t.Errorf("unescape(%q) = %q, %v; want %q", esc, back, err, c.name)
		}
	}
	for _, bad := range []string{"a.b", "a=", "a=2", "a=zz", "a=2E", "a b"} {
		if got, err := UnescapeName(bad); err == nil {
			t.Errorf("unescape(%q) = %q, accepted", bad, got)
		}
	}
	if Version != 1 {
		t.Errorf("Version = %d: a kept value's readers read the one version", Version)
	}
}

func TestAKeptValueIsReadOnlyAtItsVersionAndAKeyPartOnlyOfKeyCharacters(t *testing.T) {
	for data, ok := range map[string]bool{`{"v":1}`: true, `{"v":2}`: false, `{}`: false} {
		err := CheckVersion([]byte(data))
		if (err == nil) != ok || (!ok && !errors.Is(err, ErrUnknownVersion)) {
			t.Errorf("CheckVersion(%s) = %v", data, err)
		}
	}
	if CheckVersion([]byte(`nope`)) == nil {
		t.Error("a value that is no JSON is read")
	}
	for name, ok := range map[string]bool{"a-b_c/d=": true, "": false, "a.b": false, "a b": false, "a*": false} {
		if (CheckName("module", name) == nil) != ok {
			t.Errorf("CheckName(%q) = %v", name, CheckName("module", name))
		}
	}
	if !IsHex64(strings.Repeat("a", 64)) || IsHex64(strings.Repeat("A", 64)) || IsHex64("a") {
		t.Error("IsHex64 reads a wrong form")
	}
}