package service

import (
	"context"
	"fmt"
	"io"
	"net/http"
	"strings"

	"gitea.dwysokinski.me/Kichiyaki/notificationarr/internal/domain"
)

type Ntfy struct {
	client   *http.Client
	url      string
	topic    string
	username string
	password string
}

func NewNtfy(client *http.Client, url string, topic string, username string, password string) *Ntfy {
	return &Ntfy{
		client:   client,
		url:      url,
		topic:    topic,
		username: username,
		password: password,
	}
}

func (n *Ntfy) Publish(ctx context.Context, title, message string) error {
	// initialize request
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, n.url+"/"+n.topic, strings.NewReader(message))
	if err != nil {
		return fmt.Errorf("http.NewRequestWithContext: %w", err)
	}

	// set required headers
	req.Header.Set("Title", title)
	if n.username != "" && n.password != "" {
		req.SetBasicAuth(n.username, n.password)
	}

	// send request
	resp, err := n.client.Do(req)
	if err != nil {
		return fmt.Errorf("client.Do: %w", err)
	}
	defer func() {
		_ = resp.Body.Close()
	}()
	_, _ = io.Copy(io.Discard, resp.Body) // discard body, as it is not needed
	if resp.StatusCode != http.StatusOK {
		return domain.NewError(
			domain.WithCode(domain.ErrorCodeIO),
			domain.WithMessagef("ntfy returned unexpected status code: %d", resp.StatusCode),
		)
	}

	return nil
}