package mail

import (
	"os"
	"testing"

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

func TestFromJson(t *testing.T) {
	t.Run("right format", func(t *testing.T) {
		f, err := os.CreateTemp("", "temptest-")
		require.NoError(t, err)

		defer f.Close()
		defer os.Remove(f.Name())

		data := []byte(`{
			"sender":"test@test.com",
			"receivers": "test@test.com, test2@test.com",
			"subject": "test",
			"content": "test"
		}`)

		n, err := f.Write(data)
		require.NoError(t, err)
		require.NotEmpty(t, n)

		mail, err := FromJSON(f.Name())
		require.NoError(t, err)

		assert.Equal(t, "test@test.com", mail.Sender)
	})

	t.Run("bad sender", func(t *testing.T) {
		f, err := os.CreateTemp("", "temptest-")
		require.NoError(t, err)

		defer f.Close()
		defer os.Remove(f.Name())

		data := []byte(`{
			"sender":"test",
			"receivers": "test@test.com, test2@test.com",
			"subject": "test",
			"content": "test"
		}`)

		n, err := f.Write(data)
		require.NoError(t, err)
		require.NotEmpty(t, n)

		_, err = FromJSON(f.Name())
		require.Error(t, err)

		assert.Contains(t, err.Error(), "validation for 'Sender'")
	})
}