package cwhub

import (
	"fmt"
	"net/http"
	"path/filepath"
	"sort"
	"strings"
	"time"

	"github.com/crowdsecurity/go-cs-lib/version"
)

// hubTransport wraps a Transport to set a custom User-Agent.
type hubTransport struct {
	http.RoundTripper
}

func (t *hubTransport) RoundTrip(req *http.Request) (*http.Response, error) {
	req.Header.Set("User-Agent", "crowdsec/"+version.String())
	return t.RoundTripper.RoundTrip(req)
}

// hubClient is the HTTP client used to communicate with the CrowdSec Hub.
var hubClient = &http.Client{
	Timeout: 120 * time.Second,
	Transport: &hubTransport{http.DefaultTransport},
}

// safePath returns a joined path and ensures that it does not escape the base directory.
func safePath(dir, filePath string) (string, error) {
	absBaseDir, err := filepath.Abs(filepath.Clean(dir))
	if err != nil {
		return "", err
	}

	absFilePath, err := filepath.Abs(filepath.Join(dir, filePath))
	if err != nil {
		return "", err
	}

	if !strings.HasPrefix(absFilePath, absBaseDir) {
		return "", fmt.Errorf("path %s escapes base directory %s", filePath, dir)
	}

	return absFilePath, nil
}

// SortItemSlice sorts a slice of items by name, case insensitive.
func SortItemSlice(items []*Item) {
	sort.Slice(items, func(i, j int) bool {
		return strings.ToLower(items[i].Name) < strings.ToLower(items[j].Name)
	})
}