package store

import (
	"bytes"
	"io"
	"io/ioutil"
	"log"
	//	"net/mail"

	"golang.org/x/sync/errgroup"
)

type SpoolInterface interface {
	SpoolMessage([]Account, io.Reader) error
}

func (c *concrete) deliver(account Account, data []byte) error {
	// FIXME: this could be a FindOrCreateMaildir call for atomic create?
	maildir, err := c.FindMaildir(account, "")
	if err != nil {
		return err
	}

	message := Message{
		Maildir: maildir,
		Data:    ioutil.NopCloser(bytes.NewReader(data)),
	}

	log.Printf("Creating email for %#v", account)
	log.Print(string(data))

	return c.CreateMessage(message)
}

// FIXME: we don't actually spool for now, we just store it in each user's
// maildir. This might lead to oddness in the partial delivery case.
func (c *concrete) SpoolMessage(recipients []Account, r io.Reader) error {
	data, err := ioutil.ReadAll(r)
	if err != nil {
		return err
	}

	var g errgroup.Group

	for _, recipient := range recipients {
		recipient := recipient
		g.Go(func() error { return c.deliver(recipient, data) })
	}

	return g.Wait()
}