package main

import (
	"embed"
	"github.com/ewy1/pik/man/manview"
	"github.com/ewy1/pik/spool"
	"github.com/spf13/pflag"
	"os"
	"path/filepath"
	"strings"
	"text/template"
)

//go:embed manview/templates
var templates embed.FS

var ManOutput = pflag.String(manFlagName, "out", "directory to write man pages to (gets created)")

const manFlagName = "man-output"
const templateDir = "templates"
const manExtension = ".man"
const templateExtension = ".tmpl"

func main() {
	pflag.Parse()
	tmpl, err := template.ParseFS(templates, "*/*/*.tmpl")
	if err != nil {
		_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
		return
	}
	err = os.MkdirAll(*ManOutput, os.ModePerm)
	if err != nil {
		_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
	}
	d := manview.NewData()
	for _, t := range tmpl.Templates() {
		if !strings.HasSuffix(t.Name(), manExtension+templateExtension) {
			continue
		}

		resultFile, err := os.OpenFile(filepath.Join(*ManOutput, strings.TrimSuffix(strings.TrimSuffix(t.Name(), templateExtension), manExtension)), os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0600)
		if err != nil {
			_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
		}

		err = t.Execute(resultFile, d)
		if err != nil {
			_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
		}
	}
}