clone      = (obj) -> JSON.parse JSON.stringify obj
mustache   = require 'mustache'
jsfront    = require('jsonschema-frontend')
 
module.exports = (server, model, lib, urlprefix ) ->

  me = {}

  me.init =  (uimodel) ->
    path = __dirname+'/src/mustache'
    me.uimodel = uimodel = jsfront.parse uimodel
    uimodel.js   = require('fs').readFileSync(__dirname+"/node_modules/ng-admin/build/ng-admin.min.js").toString()
    jscode = []
    jscode.push "var admin = nga.application('"+uimodel.menu.title+"')"
    jscode.push "  .baseApiUrl('"+uimodel.model.host+"');"
    jscode.push "var entity = {};"
    for k,resource of uimodel.resources
      slug = k.split "/"
      jscode.push "entity."+ slug[1] + " = nga.entity('"+ slug[1] + "');"
    for menuitem in uimodel.menu.items
      jsfront.render "#{path}/menuitem.js", menuitem, jscode
    jscode[k] = "        "+v for k,v of jscode
    uimodel.jsconfig = jscode.join("\n") + ";\n"
    uimodel.css  = require('fs').readFileSync(__dirname+"/node_modules/ng-admin/build/ng-admin.min.css").toString()
    uimodel.html = require('fs').readFileSync(__dirname+"/src/mustache/index.html").toString()

  me.generateHTML = () ->
    return mustache.render me.uimodel.html, me.uimodel 

  lib.events.on 'beforeStart', (data, next) ->
    server = data.server 
    model  = data.model 
    lib    = data.lib 
    me.init lib.uimodel 
    urlprefix = data.urlprefix 

    # register html url
    url = model.frontend['ng-admin'].url if model.frontend?['ng-admin']?.url? 
    if url and not model.resources[ url ]?
      console.log "registering REST resource: "+url 
      ( (urlprefix,model,me) ->
          model.resources[url] =
            get:
              description: "renders html of admin screen"
          server.get url, (req,res,next) ->
              body = me.generateHTML()
              res.writeHead 200, 
                'Content-Length': Buffer.byteLength(body),
                'Content-Type': 'text/html'
              res.write(body)
              res.end()
              next()
      )(urlprefix,model,me)
    next()

  return me