package cmd

import (
	"io/ioutil"
	"log/slog"
	"os"
	"strconv"
	"strings"
	"syscall"

	"git.oblat.lv/alex/triggerssmith/internal/vars"
	"github.com/spf13/cobra"
)

var optsReloadCmd = struct {
	Debug *bool
	PID   *int
}{}

func readPID(path string) (int, error) {
	data, err := ioutil.ReadFile(path)
	if err != nil {
		return 0, err
	}

	s := strings.TrimSpace(string(data))

	pid, err := strconv.Atoi(s)
	if err != nil {
		return 0, err
	}

	return pid, nil
}

var reloadCmd = &cobra.Command{
	Use:   "reload",
	Short: "Reload active server by PID using SIGHUP",
	Run: func(cmd *cobra.Command, args []string) {
		defer func() {
			if r := recover(); r != nil {
				slog.Error("Application panicked", slog.Any("error", r))
			}
		}()
		// configure logger
		if *optsReloadCmd.Debug {
			slog.SetDefault(slog.New(slog.NewTextHandler(cmd.OutOrStdout(), &slog.HandlerOptions{Level: slog.LevelDebug, AddSource: true})))
		} else {
			slog.SetDefault(slog.New(slog.NewTextHandler(cmd.OutOrStdout(), &slog.HandlerOptions{Level: slog.LevelInfo})))
		}
		pid, err := readPID(vars.PID_PATH)
		if err != nil {
			panic(err)
		}
		*optsReloadCmd.PID = pid
		slog.Debug("restarting server", slog.Int("pid", *optsReloadCmd.PID))
		proc, err := os.FindProcess(*optsReloadCmd.PID)
		if err != nil {
			slog.Error("failed to find process", slog.Int("pid", *optsReloadCmd.PID), slog.String("err", err.Error()))
		}
		proc.Signal(syscall.SIGHUP)
		slog.Debug("done")
	},
}

func init() {
	optsReloadCmd.Debug = reloadCmd.Flags().BoolP("debug", "d", false, "Enable debug logs")
	optsReloadCmd.PID = reloadCmd.Flags().IntP("pid", "p", -1, "Define server PID")
	rootCmd.AddCommand(reloadCmd)
}