package main

import (
	"os"
	"io"
	"fmt"
	"golang.flu0r1ne.net/planr/cmd/sub"
)

const (
	VERSION = "0.0.1"
)

func printUsage(w io.Writer) {
	fmt.Fprintf (w, "usage: %s command args ...                   \n", os.Args[0])
	fmt.Fprintln(w, "  help                                                    ")
	fmt.Fprintln(w, "  version                                                 ")
	fmt.Fprintln(w, "  build                                                   ")
	fmt.Fprintln(w, "  evaluate                                                ")
}

func dieUsage() {
	printUsage(os.Stderr)
	os.Exit(1)
}

func main() {

	if len(os.Args) < 2 {
	  dieUsage()
	}

	subcommand := os.Args[1]
	subargs := os.Args[2:]

	switch subcommand {
	  case "version":
		fmt.Printf("%s\n", VERSION)
	  case "build":
		sub.Build(subargs)
	  case "evaluate":
		sub.Evaluate(subargs)
	  case "help", "-h", "-help", "--help":
		printUsage(os.Stdout)
	  default:
		fmt.Fprintf(os.Stderr, "unrecognized command %s\n", subcommand)
		dieUsage()
	}

}