package mail

import (
	"context"
	"sync"
)

// Recording is a test Notifier that records calls.
type Recording struct {
	mu   sync.Mutex
	Msgs []QuestionAnswered
}

func (r *Recording) NotifyQuestionAnswered(_ context.Context, msg QuestionAnswered) error {
	r.mu.Lock()
	defer r.mu.Unlock()
	r.Msgs = append(r.Msgs, msg)
	return nil
}

func (r *Recording) Len() int {
	r.mu.Lock()
	defer r.mu.Unlock()
	return len(r.Msgs)
}

// Snapshot returns a copy of recorded messages.
func (r *Recording) Snapshot() []QuestionAnswered {
	r.mu.Lock()
	defer r.mu.Unlock()
	out := make([]QuestionAnswered, len(r.Msgs))
	copy(out, r.Msgs)
	return out
}