// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause

package ipn

import (
	"net/netip"
	"testing"
)

// TestConfigVAlpha_ToPrefs_AdvertiseRoutes tests that ToPrefs validates routes
// provided directly as netip.Prefix values (not parsed from JSON).
func TestConfigVAlpha_ToPrefs_AdvertiseRoutes(t *testing.T) {
	tests := []struct {
		name    string
		routes  []netip.Prefix
		wantErr bool
	}{
		{
			name: "valid_routes",
			routes: []netip.Prefix{
				netip.MustParsePrefix("10.0.0.0/24"),
				netip.MustParsePrefix("2001:db8::/32"),
			},
			wantErr: false,
		},
		{
			name: "invalid_ipv4_route",
			routes: []netip.Prefix{
				netip.MustParsePrefix("10.0.0.1/24"),
			},
			wantErr: true,
		},
		{
			name: "invalid_ipv6_route",
			routes: []netip.Prefix{
				netip.MustParsePrefix("2a01:4f9:c010:c015::1/64"),
			},
			wantErr: true,
		},
		{
			name: "mixed_valid_and_invalid",
			routes: []netip.Prefix{
				netip.MustParsePrefix("10.0.0.0/24"),
				netip.MustParsePrefix("192.168.1.1/16"),
				netip.MustParsePrefix("2001:db8::/32"),
				netip.MustParsePrefix("2a01:4f9::1/64"),
			},
			wantErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			cfg := ConfigVAlpha{
				Version:         "alpha0",
				AdvertiseRoutes: tt.routes,
			}

			_, err := cfg.ToPrefs()
			if (err != nil) != tt.wantErr {
				t.Errorf("cfg.ToPrefs() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}