// Command corestack-docs creates and checks ADR and plan records. See docs/docs-format.md.
package main

import (
	"flag"
	"fmt"
	"io"
	"os"
	"time"

	"go.auvem.com/corestack/internal/docs"
)

const usage = `usage:
  corestack-docs new adr|plan "Title"
  corestack-docs check [--root DIR]
`

func main() { os.Exit(run(os.Args[1:], os.Stdout, os.Stderr, time.Now())) }

// run returns the exit status: 0 success, 1 problems or failure, 2 usage error.
func run(args []string, stdout, stderr io.Writer, now time.Time) int {
	if len(args) == 0 {
		fmt.Fprint(stderr, usage)
		return 2
	}
	switch args[0] {
	case "new":
		if len(args) != 3 || (args[1] != "adr" && args[1] != "plan") {
			fmt.Fprint(stderr, usage)
			return 2
		}
		path, err := docs.New(".", args[1], args[2], now)
		if err != nil {
			fmt.Fprintf(stderr, "corestack-docs: %v\n", err)
			return 1
		}
		fmt.Fprintln(stdout, path)
		return 0
	case "check":
		fs := flag.NewFlagSet("corestack-docs check", flag.ContinueOnError)
		fs.SetOutput(stderr)
		root := fs.String("root", ".", "repository root")
		if err := fs.Parse(args[1:]); err != nil || fs.NArg() != 0 {
			if fs.NArg() != 0 {
				fmt.Fprint(stderr, usage)
			}
			return 2
		}
		res, err := docs.Check(*root)
		if err != nil {
			fmt.Fprintf(stderr, "corestack-docs: %v\n", err)
			return 1
		}
		for _, p := range res.Problems {
			fmt.Fprintln(stdout, p)
		}
		if len(res.Problems) > 0 {
			return 1
		}
		fmt.Fprintf(stdout, "ok: %d records checked\n", res.Records)
		return 0
	}
	fmt.Fprint(stderr, usage)
	return 2
}