package notify

import (
	"fmt"
	"net/http"
	"os"
	"strings"
	"time"
)

func Publish(ntfyURL, topic, title, message string, clickUrl string) error {
	ntfyURL = strings.TrimRight(ntfyURL, "/")
	if ntfyURL == "" || topic == "" {
		return nil // nothing configured
	}

	req, err := http.NewRequest("POST", ntfyURL+"/"+topic, strings.NewReader(message))
	if err != nil {
		return err
	}
	if title != "" {
		req.Header.Set("Title", title)
	}
	req.Header.Set("Content-Type", "text/plain; charset=utf-8")
	domain := os.Getenv("DOMAIN")
	req.Header.Set("Click", fmt.Sprintf("%s%s", domain, clickUrl))

	client := &http.Client{Timeout: 3 * time.Second}
	res, err := client.Do(req)
	if err != nil {
		return err
	}
	defer res.Body.Close()

	if res.StatusCode >= 300 {
		return fmt.Errorf("ntfy returned %s", res.Status)
	}
	return nil
}