package auth

import (
	"bytes"
	"embed"
	"html/template"
	"time"

	"codeberg.org/pronounscc/pronouns.cc/backend/log"
	"emperror.dev/errors"
	"github.com/jordan-wright/email"
)

func (s *Server) SendEmail(to, title, template string, data map[string]any) {
	e := email.NewEmail()
	e.From = s.emailAddress
	e.To = []string{to}

	text, html, err := s.Template(template, data)
	if err != nil {
		log.Errorf("executing templates: %v", err)
		return
	}
	e.Text = text
	e.HTML = html

	err = s.emailPool.Send(e, 10*time.Second)
	if err != nil {
		log.Errorf("sending email: %v", err)
	}
}

//go:embed templates/*
var fs embed.FS
var tmpl = template.Must(template.ParseFS(fs, "templates/*"))

func (s *Server) Template(template string, data map[string]any) (text, html []byte, err error) {
	data["BaseURL"] = s.baseURL

	textWriter := new(bytes.Buffer)
	htmlWriter := new(bytes.Buffer)

	err = tmpl.ExecuteTemplate(textWriter, "templates/"+template+".txt", data)
	if err != nil {
		return nil, nil, errors.Wrap(err, "executing text template")
	}

	err = tmpl.ExecuteTemplate(htmlWriter, "templates/"+template+".html", data)
	if err != nil {
		return nil, nil, errors.Wrap(err, "executing HTML template")
	}

	return textWriter.Bytes(), htmlWriter.Bytes(), nil
}