package cmd

import (
	"fmt"
	"os"
	"sort"
	"text/tabwriter"

	"tuxpa.in/t/erm/app/fontinfo"
)

type ListFonts struct {
	Styles []string `name:"styles" default:"regular"`
}

func (r *ListFonts) Run(ctx *Context) error {
	matchers := []fontinfo.Matcher{}
	for _, v := range r.Styles {
		matchers = append(matchers, fontinfo.MatchStyle(v))
	}
	fonts, err := fontinfo.Match(matchers...)
	if err != nil {
		return err
	}
	sort.SliceStable(fonts, func(i, j int) bool {
		if fonts[i].Style == fonts[j].Style {
			return fonts[i].Family < fonts[j].Family
		}
		return fonts[i].Style < fonts[j].Style
	})
	w := tabwriter.NewWriter(os.Stdout, 0, 0, 0, ' ',
		tabwriter.Debug)
	fmt.Fprintln(w, "family\tstyle\tpath")
	fmt.Fprintln(w, "---\t---\t---")
	for _, font := range fonts {
		fmt.Fprintf(w, "%s\t%s\t%s\n",
			font.Style,
			font.Family,
			font.Path,
		)
		w.Flush()
	}
	return nil
}