package controllers

import (
    "fmt"
    "strconv"
    "time"

    "appengine/datastore"
    "appengine/urlfetch"

    "github.com/Zaibon/facebook"
    "github.com/Zaibon/laminerie/models"
    "github.com/astaxie/beegae"
    "github.com/russross/blackfriday"
)

const (
    fbAccessToken = ""
    fbId          = ""
)

//AdminController
type AdminController struct {
    BaseController
}

func (this *AdminController) NestPrepare() {
    beegae.ReadFromRequest(&this.BaseController.Controller)

    this.Layout = "layouts/admin/global.tpl"
}

func (this *AdminController) Dashboard() {

}

func (this *AdminController) ListNews() {
    c := this.AppEngineCtx
    q := datastore.NewQuery("NewsPost").Order("-Created")
    var news []models.NewsPost
    keys, err := q.GetAll(c, &news)
    if err != nil {
        flash := beegae.NewFlash()
        flash.Error("error loading news : %s", err)
        flash.Store(&this.BaseController.Controller)
        return
    }

    for i := range news {
        // news[i].Key = keys[i].Encode()
        news[i].Key = keys[i].IntID()
        if len(news[i].Content) > 150 {
            news[i].Content = news[i].Content[:150]
        }
        s := blackfriday.MarkdownCommon([]byte(news[i].Content))
        news[i].Content = string(s)
    }
    this.Data["news"] = news
}

func (this *AdminController) CreateNews() {
    //tell the template to include markdown js script
    this.Data["markdown"] = true
}

func (this *AdminController) AddNews() {
    c := this.AppEngineCtx

    news := models.NewsPost{}
    this.ParseForm(&news)
    news.Created = time.Now()

    flash := beegae.NewFlash()
    if news.Title == "" || news.Content == "" {
        flash.Error("aucun champ ne doit etre vide")
        flash.Store(&this.BaseController.Controller)
        this.Redirect("/admin/createnews", 302)
        return
    }

    if err := news.Save(c); err != nil {
        flash.Error("Erreur d'enregistrement : %s", err)
        flash.Store(&this.BaseController.Controller)
        this.Redirect("/admin/createnews", 302)
    }

    //facebook publication
    fbPub, _ := this.GetBool("fb")
    if fbPub == true {
        client := urlfetch.Client(c)

        session := facebook.Session{
            Client: client,
        }

        params := facebook.Params{
            "message":      news.Content,
            "access_token": fbAccessToken,
        }
        url := fmt.Sprintf("/%s/feed", fbId)
        _, err := session.Api(url, facebook.POST, params)
        if err != nil {
            flash.Error("Erreur de publication sur facebook : %s", err)
            flash.Store(&this.BaseController.Controller)
            this.Redirect("/admin/createnews", 302)
        }
    }

    flash.Notice("News bien ajoutée")
    flash.Store(&this.BaseController.Controller)
    this.Redirect("/admin/dashboard", 302)
}

func (this *AdminController) EditNews() {
    //tell the template to include markdown js script
    this.Data["markdown"] = true
    c := this.AppEngineCtx

    strKey := this.Ctx.Input.Param("0")
    key, err := strconv.ParseInt(strKey, 10, 64)
    if err != nil {
        flash := beegae.NewFlash()
        flash.Error("error loading news : %s", err)
        flash.Store(&this.BaseController.Controller)
        return
    }

    news := models.NewsPost{Key: key}
    if err := news.Get(c); err != nil {
        flash := beegae.NewFlash()
        flash.Error("error loading news : %s", err)
        flash.Store(&this.BaseController.Controller)
        return
    }

    this.Data["News"] = news
}

func (this *AdminController) EditNewSubmit() {
    c := this.AppEngineCtx

    news := models.NewsPost{}
    this.ParseForm(&news)

    oldNews := models.NewsPost{Key: news.Key}
    oldNews.Get(c)

    news.Created = oldNews.Created

    flash := beegae.NewFlash()
    if news.Title == "" || news.Content == "" {
        flash.Error("aucun champ ne doit etre vide")
        flash.Store(&this.BaseController.Controller)
        this.Redirect("/admin/createnews", 302)
        return
    }

    if err := news.Edit(c); err != nil {
        flash.Error("Erreur d'enregistrement : %s", err)
        flash.Store(&this.BaseController.Controller)
        this.Redirect("/admin/createnews", 302)
    }

    flash.Notice("News bien editée")
    flash.Store(&this.BaseController.Controller)
    this.Redirect("/admin/dashboard", 302)
}

func (this *AdminController) DeleteNews() {
    c := this.AppEngineCtx
    flash := beegae.NewFlash()
    defer func() {
        flash.Store(&this.BaseController.Controller)
        this.Redirect("/admin/listnews", 302)
    }()

    strKey := this.Ctx.Input.Param("0")
    key, err := strconv.ParseInt(strKey, 10, 64)
    if err != nil {
        flash.Error("error deleting news : %s", err)
        return
    }

    news := models.NewsPost{Key: key}
    err = news.Delete(c)
    if err != nil {
        flash.Error("error deleting news : %s", err)
    } else {
        flash.Notice("news deleted")
    }

}