package email

import (
	"context"
	"sync"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

type recordingHook struct {
	mu    sync.Mutex
	calls []hookCall
}

type hookCall struct {
	key     string
	value   string
	seconds int
}

func (h *recordingHook) SetexCtx(_ context.Context, key, value string, seconds int) error {
	h.mu.Lock()
	defer h.mu.Unlock()
	h.calls = append(h.calls, hookCall{key: key, value: value, seconds: seconds})
	return nil
}

func TestMockSender_RedisHookWritesBodyPerRecipient(t *testing.T) {
	hook := &recordingHook{}
	s := NewMockSender(WithMockRedis(hook, 30))

	_, err := s.Send(context.Background(), &Message{
		From:    "noreply@k6.local",
		To:      []string{"alice@example.com", "bob@example.com"},
		Subject: "code",
		Body:    "code is 123456",
	})
	require.NoError(t, err)

	hook.mu.Lock()
	defer hook.mu.Unlock()
	require.Len(t, hook.calls, 2)
	assert.Equal(t, MockEmailRedisKeyPrefix+"alice@example.com", hook.calls[0].key)
	assert.Equal(t, MockEmailRedisKeyPrefix+"bob@example.com", hook.calls[1].key)
	for _, c := range hook.calls {
		assert.Equal(t, "code is 123456", c.value)
		assert.Equal(t, 30, c.seconds)
	}
}

func TestMockSender_NoHookSkipsRedis(t *testing.T) {
	s := NewMockSender()
	_, err := s.Send(context.Background(), &Message{To: []string{"x@y"}, Body: "z"})
	require.NoError(t, err)
}