package main // import "git.fromouter.space/zygovh/caddy-runner"
import (
	"flag"
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
)

type config struct {
	Backends map[string]struct {
		Servers map[string]struct{ URL string }
	}
	Frontends map[string]struct {
		EntryPoints []string
		Backend     string
		Routes      map[string]struct{ Rule string }
	}
}

const PREFIX = "# +rule"

func main() {
	dir := flag.String("dir", "/opt/caddy/conf", "Path to Caddy configuration files")
	suffix := flag.String("cfgext", ".conf", "File extension for matching configuration files")
	flag.Parse()

	checkErr(filepath.Walk(*dir, func(path string, info os.FileInfo, err error) error {
		if strings.ToLower(filepath.Ext(path)) != strings.ToLower(*suffix) {
			return nil
		}

		// Read file
		data, err := ioutil.ReadFile(path)
		if err != nil {
			return err
		}

		// Split by linebreak
		lines := strings.Split(string(data), "\n")
		for _, line := range lines {
			// Skip lines without marked comments
			index := strings.Index(line, PREFIX)
			if index < 0 {
				return nil
			}
			rule := strings.TrimSpace(line[index+len(PREFIX):])
		}

		return nil
	}), "error while scanning configuration files")
}

func checkErr(err error, errfmt string, args ...interface{}) {
	if err != nil {
		fmt.Fprintf(os.Stderr, "[FATAL ERROR] "+errfmt+":\n    "+err.Error(), args...)
	}
}