package main

import (
	"fmt"
	"os"
)

const usage = `logtail-cli — debug shell for nginx-logtail collectors and aggregators

Usage:
  logtail-cli topn    [flags]   ranked label → count list
  logtail-cli trend   [flags]   per-minute time series
  logtail-cli stream  [flags]   live snapshot feed

Subcommand flags (all subcommands):
  --target  host:port[,host:port,...]  endpoints to query (default: localhost:9090)
  --json                               emit newline-delimited JSON
  --website   STRING                   filter: exact website match
  --prefix    STRING                   filter: exact client-prefix match
  --uri       STRING                   filter: exact request URI match
  --status    INT                      filter: exact HTTP status code

topn flags:
  --n         INT    number of entries (default 10)
  --window    STR    1m 5m 15m 60m 6h 24h (default 5m)
  --group-by  STR    website prefix uri status (default website)

trend flags:
  --window    STR    1m 5m 15m 60m 6h 24h (default 5m)
`

func main() {
	if len(os.Args) < 2 {
		fmt.Fprint(os.Stderr, usage)
		os.Exit(1)
	}
	switch os.Args[1] {
	case "topn":
		runTopN(os.Args[2:])
	case "trend":
		runTrend(os.Args[2:])
	case "stream":
		runStream(os.Args[2:])
	case "-h", "--help", "help":
		fmt.Print(usage)
	default:
		fmt.Fprintf(os.Stderr, "unknown subcommand %q\n\n%s", os.Args[1], usage)
		os.Exit(1)
	}
}