package logger

import (
	"log/slog"
	"os"
	"testing"
)

func TestMultiHandlerBasic(t *testing.T) {
	// Create two custom handlers that write to files
	f1, err := os.CreateTemp("", "log1_*.txt")
	if err != nil {
		t.Fatalf("failed to create temp file: %v", err)
	}
	defer os.Remove(f1.Name())
	f2, err := os.CreateTemp("", "log2_*.txt")
	if err != nil {
		t.Fatalf("failed to create temp file: %v", err)
	}
	defer os.Remove(f2.Name())

	h1 := &customMessageOnlyHandler{output: f1}
	h2 := &customMessageOnlyHandler{output: f2}
	mh := &multiHandler{handlers: []slog.Handler{h1, h2}}
	logger := slog.New(mh)

	logger.Info("test message")

	f1.Seek(0, 0)
	buf1 := make([]byte, 100)
	n1, _ := f1.Read(buf1)
	if string(buf1[:n1]) != "test message\n" {
		t.Errorf("expected message in log1, got: %q", string(buf1[:n1]))
	}

	f2.Seek(0, 0)
	buf2 := make([]byte, 100)
	n2, _ := f2.Read(buf2)
	if string(buf2[:n2]) != "test message\n" {
		t.Errorf("expected message in log2, got: %q", string(buf2[:n2]))
	}
}