package routes

import (
	"database/sql"
	"net/http"
	"strconv"

	c "git.tuxpa.in/a/gosora/common"
	co "git.tuxpa.in/a/gosora/common/counters"
	p "git.tuxpa.in/a/gosora/common/phrases"
)

// TODO: Retire this in favour of an alias for /topics/?
func ViewForum(w http.ResponseWriter, r *http.Request, u *c.User, h *c.Header, sfid string) c.RouteError {
    page, _ := strconv.Atoi(r.FormValue("page"))
    _, fid, err := ParseSEOURL(sfid)
    if err != nil {
        return c.SimpleError(p.GetErrorPhrase("url_id_must_be_integer"), w, r, h)
    }

    ferr := c.ForumUserCheck(h, w, r, u, fid)
    if ferr != nil {
        return ferr
    }
    if !u.Perms.ViewTopic {
        return c.NoPermissions(w, r, u)
    }
    h.Path = "/forums/"

    // TODO: Fix this double-check
    forum, err := c.Forums.Get(fid)
    if err == sql.ErrNoRows {
        return c.NotFound(w, r, h)
    } else if err != nil {
        return c.InternalError(err, w, r)
    }
    h.Title = forum.Name
    h.OGDesc = forum.Desc

    topicList, pagi, err := c.TopicList.GetListByForum(forum, page, 0)
    if err != nil {
        return c.InternalError(err, w, r)
    }
    h.Zone = "view_forum"
    h.ZoneID = forum.ID

    // TODO: Reduce the amount of boilerplate here
    if r.FormValue("js") == "1" {
        outBytes, err := wsTopicList(topicList, pagi.LastPage).MarshalJSON()
        if err != nil {
            return c.InternalError(err, w, r)
        }
        w.Write(outBytes)
        return nil
    }

    topicList2 := make([]c.TopicsRowMut, len(topicList))
    canMod := u.Perms.CloseTopic || u.Perms.MoveTopic
    for i, t := range topicList {
        topicList2[i] = c.TopicsRowMut{t, t.CreatedBy == u.ID || canMod}
    }

    //pageList := c.Paginate(page, lastPage, 5)
    pi := c.ForumPage{h, topicList2, forum, u.Perms.CloseTopic, u.Perms.MoveTopic, pagi}
    tmpl := forum.Tmpl
    if tmpl == "" {
        ferr = renderTemplate("forum", w, r, h, pi)
    } else {
        tmpl = "forum_" + tmpl
        err = renderTemplate3(tmpl, tmpl, w, r, h, pi)
        if err != nil {
            ferr = renderTemplate("forum", w, r, h, pi)
        }
    }
    co.ForumViewCounter.Bump(forum.ID)
    return ferr
}