package extension

import (
	"errors"
	"flag"
	"testing"
)

func TestMergeHostOptionsORAndExecConflict(t *testing.T) {
	ResetCompiled()
	t.Cleanup(ResetCompiled)
	RegisterCompiled(InProc{
		ID: "a",
		HostOptions: func() Options {
			return Options{DisableUploadIndexing: true, ExecBackend: "sandbox"}
		},
	})
	RegisterCompiled(InProc{
		ID: "b",
		HostOptions: func() Options {
			return Options{DisableExecTools: true, DisableConvCardMirror: true}
		},
	})
	got, err := MergeHostOptions(Options{Addr: "127.0.0.1:1"})
	if err != nil {
		t.Fatal(err)
	}
	if !got.DisableUploadIndexing || !got.DisableExecTools || !got.DisableConvCardMirror {
		t.Fatalf("bool merge: %+v", got)
	}
	if got.ExecBackend != "sandbox" || got.Addr != "127.0.0.1:1" {
		t.Fatalf("kept caller addr and first exec backend: %+v", got)
	}
	RegisterCompiled(InProc{
		ID:          "c",
		HostOptions: func() Options { return Options{ExecBackend: "direct"} },
	})
	if _, err := MergeHostOptions(Options{}); err == nil {
		t.Fatal("expected exec backend conflict")
	}
}

func TestPrepareCompiledCanRejectStartup(t *testing.T) {
	ResetCompiled()
	t.Cleanup(ResetCompiled)
	RegisterCompiled(InProc{
		ID: "rdm",
		Prepare: func(opt *Options) error {
			if opt.ExecBackend == "sandbox" {
				return errors.New("no bwrap")
			}
			opt.DisableExecTools = true
			return nil
		},
	})
	opt := Options{ExecBackend: "sandbox"}
	if err := PrepareCompiled(&opt); err == nil {
		t.Fatal("expected prepare error")
	}
	opt.ExecBackend = "direct"
	if err := PrepareCompiled(&opt); err != nil {
		t.Fatal(err)
	}
	if !opt.DisableExecTools {
		t.Fatal("prepare should be able to rewrite options")
	}
}

func TestCLIHookHandlesBeforeServe(t *testing.T) {
	ResetCompiled()
	t.Cleanup(ResetCompiled)
	var admin *string
	RegisterCompiled(InProc{
		ID: "rdm",
		CLI: &CLIHook{
			Register: func(fs *flag.FlagSet) {
				admin = fs.String("bootstrap-admin", "", "owner")
			},
			AfterParse: func(opt Options) (bool, error) {
				if admin == nil || *admin == "" {
					return false, nil
				}
				if opt.DataDir == "" {
					return true, errors.New("missing data")
				}
				return true, nil
			},
		},
	})
	fs := flag.NewFlagSet("serve", flag.ContinueOnError)
	RegisterCLIFlags(fs)
	if err := fs.Parse([]string{"-bootstrap-admin", "owner"}); err != nil {
		t.Fatal(err)
	}
	if fs.Lookup("data") != nil {
		t.Fatal("plugin must not redefine base flags")
	}
	handled, err := RunCLIHooks(Options{DataDir: "/tmp/data"})
	if err != nil || !handled {
		t.Fatalf("handled=%v err=%v", handled, err)
	}
	fs2 := flag.NewFlagSet("serve", flag.ContinueOnError)
	RegisterCLIFlags(fs2)
	if err := fs2.Parse(nil); err != nil {
		t.Fatal(err)
	}
	handled, err = RunCLIHooks(Options{DataDir: "/tmp/data"})
	if err != nil || handled {
		t.Fatalf("empty flag should not handle: handled=%v err=%v", handled, err)
	}
}