package logger

import (
	"fmt"
	"sync"
	"testing"
)

// TestLogHookReceivesEntries replaces the old in-memory buffer tests: the
// buffer (and its GetLogs accessor) was removed with the web log viewer, and
// the hook is now the only side channel tests assert on.
func TestLogHookReceivesEntries(t *testing.T) {
	var mu sync.Mutex
	var got []string
	prev := SetLogHook(func(level, msg string) {
		mu.Lock()
		defer mu.Unlock()
		got = append(got, level+" "+msg)
	})
	t.Cleanup(func() { SetLogHook(prev) })

	Debug("d1")
	Infof("i%d", 2)
	Warning("w3")
	Errorf("e%s", "4")

	want := []string{"DEBUG d1", "INFO i2", "WARNING w3", "ERROR e4"}
	mu.Lock()
	defer mu.Unlock()
	if len(got) != len(want) {
		t.Fatalf("hook captured %v, want %v", got, want)
	}
	for i := range want {
		if got[i] != want[i] {
			t.Fatalf("hook entry %d = %q, want %q", i, got[i], want[i])
		}
	}
}

// TestLogHookUnsetIsSilent guards the production path: with no hook
// installed, logging must simply not panic.
func TestLogHookUnsetIsSilent(t *testing.T) {
	prev := SetLogHook(nil)
	t.Cleanup(func() { SetLogHook(prev) })
	for i := range 3 {
		Info(fmt.Sprintf("m%d", i))
	}
}