package options

import (
	"flag"
	"time"
)

type Options struct {
	// Input file
	InputFile          string
	MaxFileBuffer      int
	StartLineInclusive int64
	EndLineExclusive   int64

	// Website visits
	NumWorkers  int
	Timeout     time.Duration
	MaxResponse int64

	// Health and metrics
	CheckerDomain   string
	CheckerInterval time.Duration
	MetricsInterval time.Duration
	Limit           int
}

func Parse() (opts Options) {
	flag.StringVar(&opts.InputFile, "i", "", "input file, one domain name per line")
	flag.IntVar(&opts.MaxFileBuffer, "b", 512, "max bytes to read from input file at once in MiB")
	flag.Int64Var(&opts.StartLineInclusive, "s", 0, "first line to read in input file, inclusive and zero-based index")
	flag.Int64Var(&opts.EndLineExclusive, "e", 0, "last line to read in input file, exclusive and zero-based; 0 to disable")

	flag.IntVar(&opts.NumWorkers, "w", 2, "number of parallel workers")
	flag.DurationVar(&opts.Timeout, "t", 10*time.Second, "timeout for each website visit")
	flag.Int64Var(&opts.MaxResponse, "r", 128, "max response body size to accept in MiB")

	flag.StringVar(&opts.CheckerDomain, "c", "", "domain with onion location for setup santity-checks")
	flag.DurationVar(&opts.CheckerInterval, "C", 10*time.Second, "how often to to run checker")
	flag.DurationVar(&opts.MetricsInterval, "m", 5*time.Second, "how often to emit metrics")
	flag.IntVar(&opts.Limit, "l", 10, "rate-limit that kicks in before feeding workers in reads/s")

	flag.Parse()
	return
}