package ipregion

import "testing"

func TestResolverLookupSpecialAddresses(t *testing.T) {
	resolver := &Resolver{}

	tests := []struct {
		name string
		ip   string
		want string
	}{
		{name: "ipv4 loopback", ip: "127.0.0.1", want: "本机"},
		{name: "ipv6 loopback", ip: "::1", want: "本机"},
		{name: "private network", ip: "192.168.1.10", want: "内网IP"},
		{name: "host port", ip: "10.0.0.8:443", want: "内网IP"},
		{name: "invalid", ip: "not-an-ip", want: ""},
		{name: "public disabled", ip: "8.8.8.8", want: ""},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := resolver.Lookup(tt.ip); got != tt.want {
				t.Fatalf("Lookup(%q) = %q, want %q", tt.ip, got, tt.want)
			}
		})
	}
}

func TestResolverLookupFromXDB(t *testing.T) {
	resolver, err := NewResolver("", "", nil)
	if err != nil {
		t.Fatalf("NewResolver() error = %v", err)
	}
	defer resolver.Close()

	if got := resolver.Lookup("8.8.8.8"); got == "" {
		t.Fatal("Lookup(8.8.8.8) returned empty region")
	}
}

func TestResolverExternalPathFallsBackToEmbedWhenMissing(t *testing.T) {
	resolver, err := NewResolver("/path/not/exist/ip2region_v4.xdb", "/path/not/exist/ip2region_v6.xdb", nil)
	if err != nil {
		t.Fatalf("NewResolver() error = %v", err)
	}
	defer resolver.Close()

	if got := resolver.Lookup("8.8.8.8"); got == "" {
		t.Fatal("Lookup(8.8.8.8) returned empty region")
	}
}