package main

import (
	"fmt"
	"net/http"

	"github.com/gorilla/mux"
	"github.com/gorilla/sessions"
)

func initAdminRequest(w http.ResponseWriter, req *http.Request) *pageData {
	p := InitPageData(w, req)
	return p
}

// Main admin handler, routes the request based on the category
func handleAdmin(w http.ResponseWriter, req *http.Request) {
	page := initAdminRequest(w, req)
	if !page.LoggedIn {
		page.SubTitle = "Admin Login"
		page.show("admin-login.html", w)
	} else {
		vars := mux.Vars(req)
		adminCategory := vars["category"]
		switch adminCategory {
		case "users":
			handleAdminUsers(w, req, page)
		default:
			page.show("admin-main.html", w)
		}
	}
}

func AdminAssetHandler(w http.ResponseWriter, r *http.Request) {
	http.FileServer(FS(site.DevMode))
}

func InitPageData(w http.ResponseWriter, req *http.Request) *pageData {
	if site.DevMode {
		w.Header().Set("Cache-Control", "no-cache")
	}
	p := new(pageData)
	// Get session
	var err error
	var s *sessions.Session
	if s, err = sessionStore.Get(req, site.SessionName); err != nil {
		http.Error(w, err.Error(), 500)
		return p
	}
	p.session = new(pageSession)
	p.session.session = s
	p.session.req = req
	p.session.w = w

	// First check if we're logged in
	userEmail, _ := p.session.getStringValue("email")
	// With a valid account
	p.LoggedIn = dbIsValidUserEmail(userEmail)

	p.Site = site
	p.SubTitle = "Administration"
	p.Stylesheets = make([]string, 0, 0)
	p.Stylesheets = append(p.Stylesheets, "/admin/assets/vendor/font-awesome/css/font-awesome.min.css")
	p.Stylesheets = append(p.Stylesheets, "/admin/assets/css/main.css")

	p.HeaderScripts = make([]string, 0, 0)

	p.Scripts = make([]string, 0, 0)
	p.Scripts = append(p.Scripts, "/admin/assets/js/main.js")

	p.FlashMessage, p.FlashClass = p.session.getFlashMessage()
	if p.FlashClass == "" {
		p.FlashClass = "hidden"
	}

	// Build the menu
	if p.LoggedIn {
		p.Menu = append(p.Menu, menuItem{"Admin", "/admin", "fa-key"})

		p.BottomMenu = append(p.BottomMenu, menuItem{"Users", "/admin/users", "fa-user"})
		p.BottomMenu = append(p.BottomMenu, menuItem{"Logout", "/admin/dologout", "fa-sign-out"})
	} else {
		p.BottomMenu = append(p.BottomMenu, menuItem{"Admin", "/admin", "fa-sign-in"})
	}

	return p
}

func (p *pageData) show(tmplName string, w http.ResponseWriter) error {
	for _, tmpl := range []string{
		"htmlheader.html",
		"header.html",
		tmplName,
		"footer.html",
		"htmlfooter.html",
	} {
		if err := outputTemplate(tmpl, p, w); err != nil {
			fmt.Printf("%s\n", err)
			return err
		}
	}
	return nil
}