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// Copyright 1994-2025 WIT.COM Inc Licensed GPL 3.0

package forgepb

import (
	"bytes"
	"io/ioutil"
	"net"
	"net/http"
	"os/user"
	"strings"

	"go.wit.com/lib/protobuf/gitpb"
	"go.wit.com/log"
)

func (f *Forge) HttpPost(url string, data []byte) ([]byte, error) {
	var err error
	var req *http.Request

	req, err = http.NewRequest(http.MethodPost, url, bytes.NewBuffer(data))
	// log.Info("httpPost() with len", len(data), "url", url)

	usr, _ := user.Current()
	req.Header.Set("author", usr.Username)
	req.Header.Set("hostname", f.hostname)

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		log.Error(err)
		return []byte("client.Do(req) error"), err
	}
	defer resp.Body.Close()
	// log.Info("httpPost() with len", len(data))

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Error(err)
		return body, err
	}

	return body, nil
}

func (f *Forge) LookupPBorig(check *gitpb.Repos) (*gitpb.Repos, error) {
	url := f.forgeURL + "lookup"

	for repo := range check.IterByFullPath() {
		if repo.Namespace == "" {
			repo.Namespace = repo.GoInfo.GoPath
		}
	}

	return check.SubmitReposPB(url)
}

func (f *Forge) LookupPB(check *gitpb.Repos) (*gitpb.Repos, error) {
	url := f.forgeURL + "lookup"

	queryPB := gitpb.NewRepos()

	for repo := range check.IterByFullPath() {
		ns := repo.Namespace
		if ns == "" {
			ns = repo.GoInfo.GoPath
		}

		newr := new(gitpb.Repo)
		newr.Namespace = ns

		queryPB.AppendByNamespace(newr)
	}

	return queryPB.SubmitReposPB(url)
}

func (f *Forge) UpdatePB(check *gitpb.Repos) (*gitpb.Repos, error) {
	url := f.forgeURL + "update"

	queryPB := gitpb.NewRepos()

	for repo := range check.IterByFullPath() {
		ns := repo.Namespace
		if ns == "" {
			ns = repo.GoInfo.GoPath
		}

		newr := new(gitpb.Repo)
		newr.Namespace = ns

		queryPB.AppendByNamespace(newr)
	}

	return queryPB.SubmitReposPB(url)
}

// HTTPRequestToProto converts an *http.Request to our custom HttpRequest protobuf message.
func (pb *Patches) AddHttpToPB(r *http.Request) error {
	if pb == nil {
		return log.Errorf("AddHttpToPB() pb was nil")
	}
	// Convert the header map. http.Header is a map[string][]string.
	// We'll just take the first value for each header for simplicity.
	headers := make(map[string]string)
	for name, values := range r.Header {
		if len(values) > 0 {
			headers[name] = strings.Join(values, "\n")
		}
	}

	pb.HttpRequest = &Patches_HttpRequest{
		Method:     r.Method,
		Url:        r.URL.String(),
		Proto:      r.Proto,
		Headers:    headers,
		RemoteAddr: getClientIP(r),
		Host:       r.Host,
		Hostname:   r.Header.Get("hostname"),
	}
	pb.HttpRequest.Route = cleanURL(r.URL.Path)
	return nil
}

func getIpSimple(r *http.Request) string {
	host, _, err := net.SplitHostPort(r.RemoteAddr)
	if err != nil {
		log.Printf("could not split host port: %v", err)
		return r.RemoteAddr // Fallback
	}
	return host
}

// getClientIP inspects the request for common headers to find the true client IP.
func getClientIP(r *http.Request) string {
	// Caddy sets the X-Forwarded-For header.
	if forwardedFor := r.Header.Get("X-Forwarded-For"); forwardedFor != "" {
		// The header can be a comma-separated list of IPs. The first one is the original client.
		ips := strings.Split(forwardedFor, ",")
		return strings.TrimSpace(ips[0])
	}

	// Fallback to RemoteAddr if the header is not present.
	host, _, err := net.SplitHostPort(r.RemoteAddr)
	if err != nil {
		return r.RemoteAddr
	}
	return host
}

// remove '?' part and trailing '/'
func cleanURL(url string) string {
	url = "/" + strings.Trim(url, "/")
	return url
}