package dbus_test

import (
	"errors"
	"strings"
	"testing"

	"git.ophivana.moe/cat/fortify/dbus"
	"git.ophivana.moe/cat/fortify/helper"
)

const (
	binPath = "/usr/bin/bwrap"
)

func TestNew(t *testing.T) {
	for _, tc := range [][2][2]string{
		{
			{"unix:path=/run/user/1971/bus", "/tmp/fortify.1971/1ca5d183ef4c99e74c3e544715f32702/bus"},
			{"unix:path=/run/dbus/system_bus_socket", "/tmp/fortify.1971/1ca5d183ef4c99e74c3e544715f32702/system_bus_socket"},
		},
		{
			{"unix:path=/run/user/1971/bus", "/tmp/fortify.1971/881ac3796ff3f3bf0a773824383187a0/bus"},
			{"unix:path=/run/dbus/system_bus_socket", "/tmp/fortify.1971/881ac3796ff3f3bf0a773824383187a0/system_bus_socket"},
		},
		{
			{"unix:path=/run/user/1971/bus", "/tmp/fortify.1971/3d1a5084520ef79c0c6a49a675bac701/bus"},
			{"unix:path=/run/dbus/system_bus_socket", "/tmp/fortify.1971/3d1a5084520ef79c0c6a49a675bac701/system_bus_socket"},
		},
		{
			{"unix:path=/run/user/1971/bus", "/tmp/fortify.1971/2a1639bab712799788ea0ff7aa280c35/bus"},
			{"unix:path=/run/dbus/system_bus_socket", "/tmp/fortify.1971/2a1639bab712799788ea0ff7aa280c35/system_bus_socket"},
		},
	} {
		t.Run("create instance for "+tc[0][0]+" and "+tc[1][0], func(t *testing.T) {
			if got := dbus.New(binPath, tc[0], tc[1]); !got.CompareTestNew(binPath, tc[0], tc[1]) {
				t.Errorf("New(%q, %q, %q) = %v",
					binPath, tc[0], tc[1],
					got)
			}
		})
	}
}

func TestProxy_Seal(t *testing.T) {
	ep := dbus.New(binPath, [2]string{}, [2]string{})
	if err := ep.Seal(nil, nil); !errors.Is(err, dbus.ErrConfig) {
		t.Errorf("Seal(nil, nil) error = %v, want %v",
			err, dbus.ErrConfig)
	}

	for id, tc := range testCasePairs() {
		t.Run("create seal for "+id, func(t *testing.T) {
			p := dbus.New(binPath, tc[0].bus, tc[1].bus)
			if err := p.Seal(tc[0].c, tc[1].c); (errors.Is(err, helper.ErrContainsNull)) != tc[0].wantErr {
				t.Errorf("Seal(%p, %p) error = %v, wantErr %v",
					tc[0].c, tc[1].c,
					err, tc[0].wantErr)
				return
			}

			// rest of the tests happen for sealed instances
			if tc[0].wantErr {
				return
			}

			// build null-terminated string from wanted args
			want := new(strings.Builder)
			args := append(tc[0].want, tc[1].want...)
			for _, arg := range args {
				want.WriteString(arg)
				want.WriteByte('\x00')
			}

			wt := p.AccessTestProxySeal()
			got := new(strings.Builder)
			if _, err := wt.WriteTo(got); err != nil {
				t.Errorf("p.seal.WriteTo(): %v", err)
			}

			if want.String() != got.String() {
				t.Errorf("Seal(%p, %p) seal = %v, want %v",
					tc[0].c, tc[1].c,
					got.String(), want.String())
			}
		})
	}
}

func TestProxy_Seal_Panic(t *testing.T) {
	defer func() {
		if r := recover(); r == nil {
			t.Errorf("Seal: did not panic from repeated seal")
		}
	}()

	p := dbus.New(binPath, [2]string{}, [2]string{})
	_ = p.Seal(dbus.NewConfig("", true, false), nil)
	_ = p.Seal(dbus.NewConfig("", true, false), nil)
}

func TestProxy_String(t *testing.T) {
	for id, tc := range testCasePairs() {
		// this test does not test errors
		if tc[0].wantErr {
			continue
		}

		t.Run("strings for "+id, func(t *testing.T) {
			p := dbus.New(binPath, tc[0].bus, tc[1].bus)

			// test unsealed behaviour
			want := "(unsealed dbus proxy)"
			if got := p.String(); got != want {
				t.Errorf("String() = %v, want %v",
					got, want)
			}

			if err := p.Seal(tc[0].c, tc[1].c); err != nil {
				t.Errorf("Seal(%p, %p) error = %v, wantErr %v",
					tc[0].c, tc[1].c,
					err, tc[0].wantErr)
			}

			// test sealed behaviour
			want = strings.Join(append(tc[0].want, tc[1].want...), " ")
			if got := p.String(); got != want {
				t.Errorf("String() = %v, want %v",
					got, want)
			}
		})
	}
}