package sipcall

import (
	"bytes"
	"context"
	"fmt"
	"os"
	"strings"
	"testing"
)

func TestNativePJSIPModuleReloadIsUsedAndConfirmed(t *testing.T) {
	c, path, base := stageFixture(t)
	fixture := configCLI(c, path)
	var reloads int
	cli := func(ctx context.Context, command string) ([]byte, error) {
		switch command {
		case "pjsip reload":
			return []byte("No such command 'pjsip reload' (type 'core show help pjsip reload' for other possible commands)\n"), nil
		case "module reload res_pjsip.so":
			reloads++
			return []byte("Module 'res_pjsip.so' reloaded successfully.\n"), nil
		default:
			return fixture(ctx, command)
		}
	}
	restore, err := applyConfiguration(context.Background(), c, cli)
	if err != nil {
		t.Fatalf("supported native reload failed: %v", err)
	}
	if err := restore(); err != nil {
		t.Fatal(err)
	}
	if reloads != 2 {
		t.Fatalf("expected native module reload for apply and restore, got %d", reloads)
	}
	data, err := os.ReadFile(path)
	if err != nil || !bytes.Equal(data, base) {
		t.Fatal("original configuration not restored")
	}
}

func TestPJSIPReloadRejectsZeroExitWithoutModuleConfirmation(t *testing.T) {
	for _, output := range []string{
		"No such command 'module reload res_pjsip.so'\n",
		"Module 'res_pjsip.so' could not be reloaded.\n",
		"Module 'res_other.so' reloaded successfully.\n",
		"",
	} {
		for _, phase := range []string{"apply", "restore"} {
			t.Run(fmt.Sprintf("%s/%q", phase, output), func(t *testing.T) {
				c, path, _ := stageFixture(t)
				fixture := configCLI(c, path)
				var reloads, runtimeReads int
				cli := func(ctx context.Context, command string) ([]byte, error) {
					if command == "module reload res_pjsip.so" {
						reloads++
						if phase == "apply" || reloads == 2 {
							return []byte(output), nil
						}
						return []byte("Module 'res_pjsip.so' reloaded successfully.\n"), nil
					}
					if strings.HasPrefix(command, "pjsip show endpoint ") {
						runtimeReads++
					}
					return fixture(ctx, command)
				}
				restore, err := applyConfiguration(context.Background(), c, cli)
				if phase == "apply" {
					if err == nil || !strings.Contains(err.Error(), "reload not confirmed") || runtimeReads != 0 {
						t.Fatalf("unconfirmed reload must fail before readback: error=%v reads=%d", err, runtimeReads)
					}
					return
				}
				if err != nil {
					t.Fatal(err)
				}
				if err = restore(); err == nil || !strings.Contains(err.Error(), "reload not confirmed") {
					t.Fatalf("unconfirmed restoration reload accepted: %v", err)
				}
			})
		}
	}
}