// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later

package audio

import (
	"context"
	"errors"
	"io"
	"net"
	"os/exec"
	"syscall"
	"testing"
	"time"
)

func TestRetryRecoversAndPreservesPermanentErrors(t *testing.T) {
	attempts := 0
	err := Retry(context.Background(), func(context.Context) error {
		attempts++
		if attempts < 2 {
			return &net.OpError{Op: "dial", Net: "unix", Err: syscall.ENOENT}
		}
		return nil
	}, Temporary)
	if err != nil || attempts != 2 {
		t.Fatal(err, attempts)
	}
	for _, problem := range []error{syscall.EACCES, errors.New("invalid configuration"), &exec.Error{Name: "missing-speech-daemon", Err: exec.ErrNotFound}} {
		attempts = 0
		err := Retry(context.Background(), func(context.Context) error { attempts++; return problem }, Temporary)
		if !errors.Is(err, problem) || attempts != 1 {
			t.Fatal(err, attempts)
		}
	}
}

func TestRetryCancellationStopsBackoffAndDeadlinePreservesCause(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	attempts := 0
	err := Retry(ctx, func(context.Context) error { attempts++; cancel(); return io.EOF }, Temporary)
	if !errors.Is(err, context.Canceled) || attempts != 1 {
		t.Fatal(err, attempts)
	}
	ctx, cancel = context.WithTimeout(context.Background(), 20*time.Millisecond)
	defer cancel()
	err = Retry(ctx, func(context.Context) error { return io.EOF }, Temporary)
	if !errors.Is(err, context.DeadlineExceeded) || !errors.Is(err, io.EOF) {
		t.Fatal(err)
	}
}