package main

import (
	"encoding/json"
	"log"
	"net/http"
	"strings"

	"gopkg.in/gomail.v2"
)

type FormData struct {
	Domain  string `json:"domain"`
	Name    string `json:"name"`
	Email   string `json:"email"`
	Subject string `json:"subject"`
	Message string `json:"message"`
}

type EmailConfig struct {
	Email    string
	Password string
}

var domainMap = map[string]EmailConfig{
	"tdvorak.dev":      {"info@tdvorak.dev", "%8s3Yad*!b3*t"},
	"vbly.org":         {"info@vbly.org", "!N0^e0Q9k*mV"},
	"sportcreative.eu": {"info@sportcreative.eu", "@dN$TZPgG5!"},
}

func sendHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "POST only", http.StatusMethodNotAllowed)
		return
	}

	var data FormData
	if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
		http.Error(w, "Invalid JSON", http.StatusBadRequest)
		return
	}

	data.Domain = strings.ToLower(strings.TrimSpace(data.Domain))
	config, ok := domainMap[data.Domain]
	if !ok {
		http.Error(w, "Unknown domain", http.StatusUnauthorized)
		return
	}

	m := gomail.NewMessage()
	m.SetHeader("From", config.Email)
	m.SetHeader("To", config.Email) // you can change this to forward to another inbox
	m.SetHeader("Subject", data.Subject)
	m.SetBody("text/plain", "Name: "+data.Name+"\nEmail: "+data.Email+"\n\n"+data.Message)

	d := gomail.NewDialer("smtp.purelymail.com", 465, config.Email, config.Password)
	d.SSL = true // Purelymail recommends SSL on port 465

	if err := d.DialAndSend(m); err != nil {
		log.Println("Email send error:", err)
		http.Error(w, "Failed to send email", http.StatusInternalServerError)
		return
	}

	w.Write([]byte("Email sent successfully"))
}

func enableCors(handler http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		// Allow all origins
		origin := r.Header.Get("Origin")
		if origin != "" {
			w.Header().Set("Access-Control-Allow-Origin", "*")
			w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS")
			w.Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, Authorization")
		}

		// Handle preflight requests
		if r.Method == http.MethodOptions {
			w.WriteHeader(http.StatusOK)
			return
		}

		handler(w, r)
	}
}

func main() {
	http.HandleFunc("/send", enableCors(sendHandler))
	log.Println("Server running on :8080")
	log.Fatal(http.ListenAndServe(":8080", nil))
}