package main

import (
	"flag"
	"fmt"
)

func runBleStream(h hostConn, args []string) error {
	fs := flag.NewFlagSet("ble-stream", flag.ExitOnError)
	clientID := fs.Uint("client", 0, "slave client id (0 = all_clients)")
	periodMs := fs.Uint("period", 10, "BLE push period_ms (10–16)")
	count := fs.Int("count", 50, "number of BleStreamTick samples")
	tolMs := fs.Float64("tol", 2.0, "tolerance ms around period for window_ok")
	duration := fs.Float64("timeout", 15.0, "max seconds waiting for ticks")
	if err := fs.Parse(args); err != nil {
		return err
	}

	fmt.Printf("accel stream on; period_ms=%d; collecting %d ticks…\n", *periodMs, *count)
	out := measureBleStream(h, uint32(*clientID), uint32(*periodMs), *count, *tolMs, *duration)
	if !out.Success {
		return fmt.Errorf("%s", out.Error)
	}
	fmt.Printf("received=%d/%d period_ms=%d tol=±%.1f ms\n", out.Received, out.Requested, out.PeriodMs, out.TolMs)
	printStat("dT ESP inter-depart", out.DTEsp)
	printStat("dR PC  inter-arrive", out.DRPc)
	printStat("extra vs first", out.ExtraVsFirst)
	fmt.Printf("outside_tol=%d/%d  window_ok=%s\n", out.OutsideTol, out.DTEsp.N,
		map[bool]string{true: "yes", false: "no"}[out.WindowOK])
	return nil
}

func printStat(name string, s latencyStats) {
	if s.N == 0 {
		fmt.Printf("%s: (none)\n", name)
		return
	}
	fmt.Printf("%s: n=%d  min=%.3f  median=%.3f  mean=%.3f  max=%.3f  ms\n",
		name, s.N, s.MinMs, s.MedMs, s.MeanMs, s.MaxMs)
}