//go:generate bash -c "mkdir -p codegen/user_service && go run github.com/deepmap/oapi-codegen/cmd/oapi-codegen@v1.12.4 -generate types,server,spec -package codegen api/user-service/openapi.yaml > codegen/user_service/user_service_api.go"
//go:generate bash -c "mkdir -p codegen/message_bus && go run github.com/deepmap/oapi-codegen/cmd/oapi-codegen@v1.12.4 -package message_bus https://raw.githubusercontent.com/IceWhaleTech/CasaOS-MessageBus/main/api/message_bus/openapi.yaml > codegen/message_bus/api.go"
package main

import (
	_ "embed"
	"flag"
	"fmt"
	"net"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/IceWhaleTech/CasaOS-Common/external"
	"github.com/IceWhaleTech/CasaOS-Common/model"
	util_http "github.com/IceWhaleTech/CasaOS-Common/utils/http"
	"github.com/IceWhaleTech/CasaOS-Common/utils/jwt"
	"github.com/IceWhaleTech/CasaOS-Common/utils/logger"
	"github.com/IceWhaleTech/CasaOS-UserService/common"
	"github.com/IceWhaleTech/CasaOS-UserService/pkg/config"
	"github.com/IceWhaleTech/CasaOS-UserService/pkg/sqlite"
	"github.com/IceWhaleTech/CasaOS-UserService/pkg/utils/encryption"
	"github.com/IceWhaleTech/CasaOS-UserService/pkg/utils/random"
	"github.com/IceWhaleTech/CasaOS-UserService/route"
	"github.com/IceWhaleTech/CasaOS-UserService/service"
	"github.com/coreos/go-systemd/daemon"
	"go.uber.org/zap"
)

const localhost = "127.0.0.1"

var (
	commit = "private build"
	date   = "private build"

	//go:embed api/index.html
	_docHTML string

	//go:embed api/user-service/openapi.yaml
	_docYAML string

	//go:embed build/sysroot/etc/casaos/user-service.conf.sample
	_confSample string
)

func init() {
	configFlag := flag.String("c", "", "config address")
	dbFlag := flag.String("db", "", "db path")
	resetUserFlag := flag.Bool("ru", false, "reset user")
	userFlag := flag.String("user", "", "user name")
	versionFlag := flag.Bool("v", false, "version")

	flag.Parse()

	if *versionFlag {
		fmt.Printf("v%s\n", common.Version)
		os.Exit(0)
	}

	println("git commit:", commit)
	println("build date:", date)

	config.InitSetup(*configFlag, _confSample)

	logger.LogInit(config.AppInfo.LogPath, config.AppInfo.LogSaveName, config.AppInfo.LogFileExt)

	if len(*dbFlag) == 0 {
		*dbFlag = config.AppInfo.DBPath
	}

	sqliteDB := sqlite.GetDb(*dbFlag)
	service.MyService = service.NewService(sqliteDB, config.CommonInfo.RuntimePath)

	if *resetUserFlag {
		if userFlag == nil || len(*userFlag) == 0 {
			fmt.Println("user is empty")
			return
		}

		userData := service.MyService.User().GetUserAllInfoByName(*userFlag)

		if userData.Id == 0 {
			fmt.Println("user not exist")
			return
		}

		password := random.RandomString(6, false)
		userData.Password = encryption.GetMD5ByStr(password)
		service.MyService.User().UpdateUserPassword(userData)
		fmt.Println("User reset successful")
		fmt.Println("UserName:" + userData.Username)
		fmt.Println("Password:" + password)
	}
}

func main() {
	v1Router := route.InitRouter()
	v2Router := route.InitV2Router()
	v2DocRouter := route.InitV2DocRouter(_docHTML, _docYAML)

	_, publicKey := service.MyService.User().GetKeyPair()

	jswkJSON, err := jwt.GenerateJwksJSON(publicKey)
	if err != nil {
		panic(err)
	}

	mux := &util_http.HandlerMultiplexer{
		HandlerMap: map[string]http.Handler{
			"v1":                                    v1Router,
			"v2":                                    v2Router,
			"doc":                                   v2DocRouter,
			strings.SplitN(jwt.JWKSPath, "/", 2)[0]: jwt.JWKSHandler(jswkJSON),
		},
	}

	listener, err := net.Listen("tcp", net.JoinHostPort(localhost, "0"))
	if err != nil {
		panic(err)
	}

	apiPaths := []string{
		"/v1/users",
		route.V2APIPath,
		route.V2DocPath,
		"/" + jwt.JWKSPath,
	}
	for _, v := range apiPaths {
		err = service.MyService.Gateway().CreateRoute(&model.Route{
			Path:   v,
			Target: "http://" + listener.Addr().String(),
		})

		if err != nil {
			panic(err)
		}
	}

	// write address file
	addressFilePath, err := writeAddressFile(config.CommonInfo.RuntimePath, external.UserServiceAddressFilename, "http://"+listener.Addr().String())
	if err != nil {
		panic(err)
	}

	if supported, err := daemon.SdNotify(false, daemon.SdNotifyReady); err != nil {
		logger.Error("Failed to notify systemd that user service is ready", zap.Any("error", err))
	} else if supported {
		logger.Info("Notified systemd that user service is ready")
	} else {
		logger.Info("This process is not running as a systemd service.")
	}
	go route.EventListen()
	logger.Info("User service is listening...", zap.Any("address", listener.Addr().String()), zap.String("filepath", addressFilePath))

	s := &http.Server{
		Handler:           mux,
		ReadHeaderTimeout: 5 * time.Second, // fix G112: Potential slowloris attack (see https://github.com/securego/gosec)
	}

	err = s.Serve(listener) // not using http.serve() to fix G114: Use of net/http serve function that has no support for setting timeouts (see https://github.com/securego/gosec)
	if err != nil {
		panic(err)
	}
}

func writeAddressFile(runtimePath string, filename string, address string) (string, error) {
	err := os.MkdirAll(runtimePath, 0o755)
	if err != nil {
		return "", err
	}

	filepath := filepath.Join(runtimePath, filename)
	return filepath, os.WriteFile(filepath, []byte(address), 0o600)
}
