package main

import (
	"log"
	"net/http"
	"strconv"
	"strings"

	"github.com/bouncepaw/mycorrhiza/history"
	"github.com/bouncepaw/mycorrhiza/templates"
	"github.com/bouncepaw/mycorrhiza/util"
)

func init() {
	http.HandleFunc("/history/", handlerHistory)
	http.HandleFunc("/recent-changes/", handlerRecentChanges)
}

// handlerHistory lists all revisions of a hypha
func handlerHistory(w http.ResponseWriter, rq *http.Request) {
	log.Println(rq.URL)
	hyphaName := HyphaNameFromRq(rq, "history")
	var list string

	// History can be found for files that do not exist anymore.
	revs, err := history.Revisions(hyphaName)
	if err == nil {
		list = history.HistoryWithRevisions(hyphaName, revs)
	}
	log.Println("Found", len(revs), "revisions for", hyphaName)

	util.HTTP200Page(w,
		base(hyphaName, templates.HistoryHTML(rq, hyphaName, list)))
}

// Recent changes
func handlerRecentChanges(w http.ResponseWriter, rq *http.Request) {
	log.Println(rq.URL)
	var (
		noPrefix = strings.TrimPrefix(rq.URL.String(), "/recent-changes/")
		n, err   = strconv.Atoi(noPrefix)
	)
	if err == nil && n < 101 {
		util.HTTP200Page(w, base(strconv.Itoa(n)+" recent changes", history.RecentChanges(n)))
	} else {
		http.Redirect(w, rq, "/recent-changes/20", http.StatusSeeOther)
	}
}