package appoptics

import (
	"context"
	b64 "encoding/base64"
	"fmt"
	regexp "github.com/wasilibs/go-re2"
	"net/http"
	"strings"

	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
	"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detector_typepb"
)

type Scanner struct {
	client *http.Client
}

// Ensure the Scanner satisfies the interface at compile time.
var _ detectors.Detector = (*Scanner)(nil)

var (
	defaultClient = common.SaneHttpClient()
	// Make sure that your group is surrounded in boundary characters such as below to reduce false positives.
	keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"appoptics"}) + `\b([0-9a-zA-Z_-]{71})\b`)
)

// Keywords are used for efficiently pre-filtering chunks.
// Use identifiers in the secret preferably, or the provider name.
func (s Scanner) Keywords() []string {
	return []string{"appoptics"}
}

// FromData will find and optionally verify Appoptics secrets in a given set of bytes.
func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (results []detectors.Result, err error) {
	dataStr := string(data)

	matches := keyPat.FindAllStringSubmatch(dataStr, -1)

	for _, match := range matches {
		resMatch := strings.TrimSpace(match[1])

		s1 := detectors.Result{
			DetectorType: detector_typepb.DetectorType_AppOptics,
			Raw:          []byte(resMatch),
			SecretParts:  map[string]string{"key": resMatch},
		}

		if verify {
			client := s.client
			if client == nil {
				client = defaultClient
			}
			req, err := http.NewRequestWithContext(ctx, "GET", "https://api.appoptics.com/v1/metrics", nil)
			if err != nil {
				continue
			}

			data := fmt.Sprintf("%s:", resMatch)
			sEnc := b64.StdEncoding.EncodeToString([]byte(data))

			req.Header.Add("Content-Type", "application/json")
			req.Header.Add("Authorization", fmt.Sprintf("Basic %s", sEnc))

			res, err := client.Do(req)
			if err == nil {
				defer res.Body.Close()
				if res.StatusCode >= 200 && res.StatusCode < 300 {
					s1.Verified = true
				} else if res.StatusCode == 401 {
					// The secret is determinately not verified (nothing to do)
				} else {
					err = fmt.Errorf("unexpected HTTP response status %d", res.StatusCode)
					s1.SetVerificationError(err, resMatch)
				}
			} else {
				s1.SetVerificationError(err, resMatch)
			}
		}

		results = append(results, s1)
	}

	return results, nil
}

func (s Scanner) Type() detector_typepb.DetectorType {
	return detector_typepb.DetectorType_AppOptics
}

func (s Scanner) Description() string {
	return "AppOptics is a cloud-based infrastructure monitoring service. AppOptics API keys can be used to access and manage monitoring data and configurations."
}
