package generate

import (
	"flag"
	"fmt"
	"git.gutmet.org/goutil.git"
	"git.gutmet.org/simpleserver.git"
	"git.gutmet.org/wombat.git/blog"
	"git.gutmet.org/wombat.git/converter"
	"git.gutmet.org/wombat.git/gallery"
	"git.gutmet.org/wombat.git/initer"
	"git.gutmet.org/wombat.git/site"
	"git.gutmet.org/wombat.git/splitter"
	"os"
)

func removeAll(path string) {
	err := os.RemoveAll(path)
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
	}
}

func clean() {
	removeAll("stage1")
	removeAll("stage2")
}

func stage1() {
	goutil.CopyDirsLinkFiles("stage0", "stage1")
	mdfiles := goutil.RecListFilesExt("stage1", ".md")
	htmlfrags := goutil.RecListFilesExt("stage1", ".html")
	splitter.SplitAll(append(mdfiles, htmlfrags...))
	converter.ConvertAll(mdfiles)
}

func blogs() []string {
	dirs, err := goutil.DirsWithPrefix("stage0", "blog")
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
	}
	return dirs
}

func stage2() {
	goutil.CopyDirsLinkFiles("stage1", "stage2")
	site.Generate()
	for _, blogdir := range blogs() {
		blog.Generate(blogdir)
	}
	descfiles := goutil.RecListFilesExt("stage2", ".desc")
	for _, f := range descfiles {
		err := os.Remove(f)
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
		}
	}
	os.Remove("stage2/README")
}

func Generate(f GenerateFlags) error {
	initer.InitializedOrDie()
	clean()
	gallery.Generate(gallery.Flags{})
	stage1()
	stage2()
	if !f.Noserve {
		simpleserver.Serve("stage2")
	}
	return nil
}

type GenerateFlags struct {
	Noserve bool
}

func Command() (goutil.CommandFlagsInit, goutil.CommandFunc) {
	f := GenerateFlags{}
	flagsInit := func(s *flag.FlagSet) {
		s.BoolVar(&f.Noserve, "noserve", false, "don't start webserver after generating")
	}
	return flagsInit, func([]string) error { return Generate(f) }
}