package hooks

import (
	"github.com/bluenviron/mediamtx/internal/conf"
	"github.com/bluenviron/mediamtx/internal/externalcmd"
	"github.com/bluenviron/mediamtx/internal/logger"
)

// OnInitParams are the parameters of OnInit.
type OnInitParams struct {
	Logger          logger.Writer
	ExternalCmdPool *externalcmd.Pool
	Conf            *conf.Path
	ExternalCmdEnv  externalcmd.Environment
}

// OnInit is the OnInit hook.
func OnInit(params OnInitParams) func() {
	var onInitCmd *externalcmd.Cmd

	if params.Conf.RunOnInit != "" {
		params.Logger.Log(logger.Info, "runOnInit command started")
		onInitCmd = externalcmd.NewCmd(
			params.ExternalCmdPool,
			params.Conf.RunOnInit,
			params.Conf.RunOnInitRestart,
			params.ExternalCmdEnv,
			func(err error) {
				params.Logger.Log(logger.Info, "runOnInit command exited: %v", err)
			})
	}

	return func() {
		if onInitCmd != nil {
			onInitCmd.Close()
			params.Logger.Log(logger.Info, "runOnInit command stopped")
		}
	}
}