//go:build darwin
// +build darwin

package agent

import (
	"fmt"
	"log"
	"net/url"
	"path/filepath"
	"regexp"
	"runtime"
	"strconv"
	"strings"
	"time"

	"github.com/go-resty/resty/v2"
	"github.com/spf13/viper"
	trmm "github.com/wh1te909/trmm-shared"
)

const (
	etcConfig = "/etc/tacticalagent"
)

func (a *Agent) Install(i *Installer) {
	a.checkExistingAndRemove(i.Silent)
	i.Headers = map[string]string{
		"content-type":  "application/json",
		"Authorization": fmt.Sprintf("Token %s", i.Token),
	}

	a.AgentID = GenerateAgentID()
	a.Logger.Debugln("Agent ID:", a.AgentID)
	u, err := url.Parse(i.RMM)
	if err != nil {
		a.installerMsg(err.Error(), "error", i.Silent)
	}

	if u.Scheme != "https" && u.Scheme != "http" {
		a.installerMsg("Invalid URL (must contain https or http)", "error", i.Silent)
	}

	// will match either ipv4 , or ipv4:port
	var ipPort = regexp.MustCompile(`[0-9]+(?:\.[0-9]+){3}(:[0-9]+)?`)
	// if ipv4:port, strip the port to get ip for salt master
	if ipPort.MatchString(u.Host) && strings.Contains(u.Host, ":") {
		i.SaltMaster = strings.Split(u.Host, ":")[0]
	} else if strings.Contains(u.Host, ":") {
		i.SaltMaster = strings.Split(u.Host, ":")[0]
	} else {
		i.SaltMaster = u.Host
	}

	a.Logger.Debugln("API:", i.SaltMaster)
	terr := TestTCP(fmt.Sprintf("%s:4222", i.SaltMaster))
	if terr != nil {
		a.installerMsg(fmt.Sprintf("ERROR: Either port 4222 TCP is not open on your RMM, or nats.service is not running.\n\n%s", terr.Error()), "error", i.Silent)
	}

	baseURL := u.Scheme + "://" + u.Host
	a.Logger.Debugln("Base URL:", baseURL)

	iClient := resty.New()
	iClient.SetCloseConnection(true)
	iClient.SetTimeout(15 * time.Second)
	iClient.SetDebug(a.Debug)
	iClient.SetHeaders(i.Headers)

	// set proxy if applicable
	if len(i.Proxy) > 0 {
		a.Logger.Infoln("Using proxy:", i.Proxy)
		iClient.SetProxy(i.Proxy)
	}

	creds, cerr := iClient.R().Get(fmt.Sprintf("%s/api/v3/installer/", baseURL))
	if cerr != nil {
		a.installerMsg(cerr.Error(), "error", i.Silent)
	}
	if creds.StatusCode() == 401 {
		a.installerMsg("Installer token has expired. Please generate a new one.", "error", i.Silent)
	}

	verPayload := map[string]string{"version": a.Version}
	iVersion, ierr := iClient.R().SetBody(verPayload).Post(fmt.Sprintf("%s/api/v3/installer/", baseURL))
	if ierr != nil {
		a.installerMsg(ierr.Error(), "error", i.Silent)
	}
	if iVersion.StatusCode() != 200 {
		a.installerMsg(DjangoStringResp(iVersion.String()), "error", i.Silent)
	}

	rClient := resty.New()
	rClient.SetCloseConnection(true)
	rClient.SetTimeout(i.Timeout * time.Second)
	rClient.SetDebug(a.Debug)
	// set rest knox headers
	rClient.SetHeaders(i.Headers)

	// set local cert if applicable
	if len(i.Cert) > 0 {
		if !trmm.FileExists(i.Cert) {
			a.installerMsg(fmt.Sprintf("%s does not exist", i.Cert), "error", i.Silent)
		}
		rClient.SetRootCertificate(i.Cert)
	}

	if len(i.Proxy) > 0 {
		rClient.SetProxy(i.Proxy)
	}

	var installerMeshSystemEXE string
	if len(i.MeshDir) > 0 {
		installerMeshSystemEXE = filepath.Join(i.MeshDir, "MeshAgent.exe")
	} else {
		installerMeshSystemEXE = a.MeshSystemBin
	}

	var meshNodeID string

	if runtime.GOOS == "windows" && !i.NoMesh {
		mesh := filepath.Join(a.ProgramDir, a.MeshInstaller)
		if i.LocalMesh == "" {
			a.Logger.Infoln("Downloading mesh agent...")
			payload := map[string]string{"goarch": a.GoArch, "plat": a.Platform}
			r, err := rClient.R().SetBody(payload).SetOutput(mesh).Post(fmt.Sprintf("%s/api/v3/meshexe/", baseURL))
			if err != nil {
				a.installerMsg(fmt.Sprintf("Failed to download mesh agent: %s", err.Error()), "error", i.Silent)
			}
			if r.StatusCode() != 200 {
				a.installerMsg(fmt.Sprintf("Unable to download the mesh agent from the RMM. %s", r.String()), "error", i.Silent)
			}
		} else {
			err := copyFile(i.LocalMesh, mesh)
			if err != nil {
				a.installerMsg(err.Error(), "error", i.Silent)
			}
		}

		a.Logger.Infoln("Installing mesh agent...")
		a.Logger.Debugln("Mesh agent:", mesh)
		time.Sleep(1 * time.Second)

		meshNodeID, err = a.installMesh(mesh, installerMeshSystemEXE, i.Proxy)
		if err != nil {
			a.installerMsg(fmt.Sprintf("Failed to install mesh agent: %s", err.Error()), "error", i.Silent)
		}
	}

	if len(i.MeshNodeID) > 0 {
		meshNodeID = i.MeshNodeID
	}

	a.Logger.Infoln("Adding agent to dashboard")
	// add agent
	type NewAgentResp struct {
		AgentPK int    `json:"pk"`
		Token   string `json:"token"`
	}
	agentPayload := map[string]interface{}{
		"agent_id":        a.AgentID,
		"hostname":        a.Hostname,
		"site":            i.SiteID,
		"monitoring_type": i.AgentType,
		"mesh_node_id":    meshNodeID,
		"description":     i.Description,
		"goarch":          a.GoArch,
		"plat":            a.Platform,
	}

	r, err := rClient.R().SetBody(agentPayload).SetResult(&NewAgentResp{}).Post(fmt.Sprintf("%s/api/v3/newagent/", baseURL))
	if err != nil {
		a.installerMsg(err.Error(), "error", i.Silent)
	}
	if r.StatusCode() != 200 {
		a.installerMsg(r.String(), "error", i.Silent)
	}

	agentPK := r.Result().(*NewAgentResp).AgentPK
	agentToken := r.Result().(*NewAgentResp).Token

	a.Logger.Debugln("Agent token:", agentToken)
	a.Logger.Debugln("Agent PK:", agentPK)

	createAgentConfig(baseURL, a.AgentID, i.SaltMaster, agentToken, strconv.Itoa(agentPK), i.Cert, i.Proxy, i.MeshDir)
	time.Sleep(1 * time.Second)
	// refresh our agent with new values
	a = New(a.Logger, a.Version)
	a.Logger.Debugf("%+v\n", a)

	// set new headers, no longer knox auth...use agent auth
	rClient.SetHeaders(a.Headers)

	time.Sleep(3 * time.Second)
	// check in once
	a.DoNatsCheckIn()

	if runtime.GOOS == "windows" {
		// send software api
		a.SendSoftware()

		a.Logger.Debugln("Creating temp dir")
		a.CreateTRMMTempDir()

		a.Logger.Debugln("Disabling automatic windows updates")
		a.PatchMgmnt(true)

		a.Logger.Infoln("Installing service...")
		err := a.InstallService()
		if err != nil {
			a.installerMsg(err.Error(), "error", i.Silent)
		}

		time.Sleep(1 * time.Second)
		a.Logger.Infoln("Starting service...")
		out := a.ControlService(winSvcName, "start")
		if !out.Success {
			a.installerMsg(out.ErrorMsg, "error", i.Silent)
		}

		a.Logger.Infoln("Adding windows defender exclusions")
		a.addDefenderExlusions()

		if i.Power {
			a.Logger.Infoln("Disabling sleep/hibernate...")
			DisableSleepHibernate()
		}

		if i.Ping {
			a.Logger.Infoln("Enabling ping...")
			EnablePing()
		}

		if i.RDP {
			a.Logger.Infoln("Enabling RDP...")
			EnableRDP()
		}
	}

	a.installerMsg("Installation was successfull!\nAllow a few minutes for the agent to properly display in the RMM", "info", i.Silent)
}

func (a *Agent) checkExistingAndRemove(silent bool) {}

func (a *Agent) installerMsg(msg, alert string, silent bool) {
	if alert == "error" {
		a.Logger.Fatalln(msg)
	} else {
		a.Logger.Info(msg)
	}
}

func createAgentConfig(baseurl, agentid, apiurl, token, agentpk, cert, proxy, meshdir string) {
	viper.SetConfigType("json")
	viper.Set("baseurl", baseurl)
	viper.Set("agentid", agentid)
	viper.Set("apiurl", apiurl)
	viper.Set("token", token)
	viper.Set("agentpk", agentpk)
	viper.Set("cert", cert)
	viper.Set("proxy", proxy)
	viper.Set("meshdir", meshdir)
	viper.SetConfigPermissions(0660)
	err := viper.SafeWriteConfigAs(etcConfig)
	if err != nil {
		log.Fatalln("createAgentConfig", err)
	}
}

func (a *Agent) addDefenderExlusions() {}

func DisableSleepHibernate() {}

func EnablePing() {}

func EnableRDP() {}