package naming_test

import (
	"testing"

	"felis.lolicon.best/internal/naming"
)

func TestValidateServerName(t *testing.T) {
	cases := []struct {
		name string
		ok   bool
	}{
		{"survival", true},
		{"creative-2", true},
		{"abc", true},
		{"a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6", true}, // 32 chars
		{"ab", false}, // too short
		{"a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q", false}, // 33 chars
		{"Survival", false},                          // uppercase
		{"has_underscore", false},                    // illegal char
		{"has space", false},                         // illegal char
		{"-leading", false},                          // leading hyphen
		{"trailing-", false},                         // trailing hyphen
		{"lobby", false},                             // reserved
		{"admin", false},                             // reserved
		{"api", false},                               // reserved
	}
	for _, c := range cases {
		err := naming.ValidateServerName(c.name)
		if c.ok && err != nil {
			t.Errorf("ValidateServerName(%q) = %v, want ok", c.name, err)
		}
		if !c.ok && err == nil {
			t.Errorf("ValidateServerName(%q) = nil, want error", c.name)
		}
	}
}

func TestWorldPVCName(t *testing.T) {
	cases := map[string]string{
		"survival":   "world-survival-0",
		"creative-2": "world-creative-2-0",
	}
	for server, want := range cases {
		if got := naming.WorldPVCName(server); got != want {
			t.Errorf("WorldPVCName(%q) = %q, want %q", server, got, want)
		}
	}
}

func TestHostname(t *testing.T) {
	const root = "mc.example.net"
	got, err := naming.Hostname("survival", root)
	if err != nil {
		t.Fatalf("Hostname: %v", err)
	}
	if got != "survival.mc.example.net" {
		t.Errorf("Hostname = %q, want survival.mc.example.net", got)
	}
	if _, err := naming.Hostname("lobby", root); err == nil {
		t.Error("Hostname should reject a reserved subdomain")
	}
	if _, err := naming.Hostname("survival", ""); err == nil {
		t.Error("Hostname should reject an empty root domain")
	}
}

func TestValidateHostname(t *testing.T) {
	const root = "mc.example.net"
	cases := []struct {
		host string
		ok   bool
	}{
		{"survival.mc.example.net", true},
		{"a.mc.example.net", true},
		{"deep.sub.mc.example.net", false}, // not a single label under root
		{"survival.evil.example.org", false},
		{"mc.example.net", false}, // bare root, no label
		{".mc.example.net", false},
		{"-bad.mc.example.net", false},
	}
	for _, c := range cases {
		err := naming.ValidateHostname(c.host, root)
		if c.ok && err != nil {
			t.Errorf("ValidateHostname(%q) = %v, want ok", c.host, err)
		}
		if !c.ok && err == nil {
			t.Errorf("ValidateHostname(%q) = nil, want error", c.host)
		}
	}
	if err := naming.ValidateHostname("x.mc.example.net", ""); err == nil {
		t.Error("ValidateHostname should reject an empty root domain")
	}
}