package main

import (
	"fmt"
	"github.com/otiai10/copy"
	"os"
	"path/filepath"
)

func main() {
	// show usage if config file is missing
	if len(os.Args) < 2 {
		fmt.Println("Usage: godocs <config>")
		os.Exit(1)
	}

	// read config file specified in the command line
	cfg := readConfig(os.Args[1])

	// create temporary target directory
	tmp := createTempDir("godocs")
	defer os.RemoveAll(tmp)

	// gather all sites in docsRoot
	sites := getSites(cfg)

	for _, site := range sites {
		// collect all entries
		entries := findEntries(site.sourcePath)

		// render all entries
		createPageMap(&site, entries)

		// create navigation item slice
		createNavSlice(&site, cfg)

		// output the site
		generateSite(site, cfg, tmp)
	}

	// copy CSS file to generation directory
	err := copy.Copy(cfg.CssFile, filepath.Join(tmp, "style.css"))
	if err != nil {
		panic(err)
	}

	// if we are here, generation succeeded, so we move the generated content to the target directory
	err = os.RemoveAll(cfg.TargetDir)
	if err != nil {
		panic(err)
	}

	err = os.Rename(tmp, cfg.TargetDir)
	if err != nil {
		panic(err)
	}

	// fix because for some reason the generated directory ends up with the wrong permissions
	err = os.Chmod(cfg.TargetDir, 0755)
	if err != nil {
		panic(err)
	}
}