local util = require("util")

-- todo: clean up code once the code below is no longer in flux 

return {

  middleware = function(req,res,next)
    local tile = require('page/partial/tile')
    local rootpath = "/" .. app.opts.plugin_diskscan_dirname 
    local urlpath  = GetPath()
    local isdir    = urlpath:sub(-1) == "/" 
    local nslashes = util.countChar('/',urlpath)
    res.items    = {}
    local match    = function(a,b) return util.stripPath(a) == util.stripPath(b) end
    if urlpath:match("^"..rootpath) and not urlpath:gsub(".*/",""):match(".") then
      local redirect = false
      if not app.cache.url[ urlpath ] then
        foreach( app.cache.items, function(k,v)
          if v.parent then
            trace( "path = "     .. util.stripPath(v.path) .. " " ..
                   "parent = "  .. util.stripPath(v.parent.path) .. " " ..
                   "urlpath = " .. util.stripPath(urlpath)
            )
            if match(v.path, urlpath) then -- show parent folder if any
              local parent = app.cache.items[ v.parent.id ]
              if v.portal then 
                redirect = v.portal.url
              end
              if match(parent.path, app.opts.plugin_diskscan_dir) then -- add rootfolder if needed
                local root = app.cache.items[ app.opts.plugin_diskscan_dir ] 
                --res.items[ root.id ] = root
              end
            end

            -- add items from dir
            if match(v.parent.path, urlpath) then 
              local parent = app.cache.items[ v.parent.id ]
              res.items[ v.id ] = v
              res.parent = parent
              if v.thumbnail then
                print_r(v.name .. " => " .. v.thumbnail)
              end
              --if parent.parent then
              --  res.items[ v.id ] = v 
              --else
              --  res.items[ parent.id ] = parent
              --end
            end
          end
        end)
        local data = util.merge({
          html_items='', 
          items = {},
          parent=res.parent
        },{ opts = app.opts })
        data.tile = tile
        local i = 0
        foreach( res.items, function(k,v)
          -- position items for janusxr JML (dir.html)
          table.insert(data.items, util.merge({x = i*2, i = i},v) )
          i=i+1
          if v.view3D then 
            data.item = v 
            data.title = data.item.title
            local port = ':' .. GetPort()
            if port == 80 then port = '' end
            data.url = GetScheme() .. '://' .. GetHost() .. port ..  v.url 
          else
            data.html_items = data.html_items .. tile({item=v})
          end
        end)
        if data.item then
          app.cache.url[ urlpath ] = util.templateFile( "page/item.html", data)
        else
          app.cache.url[ urlpath ] = util.templateFile( "page/dir.html", data)
        end
      end
      if redirect then
        print("REDIRECT! " .. redirect )
        res.status(303)
        res.header('Location', redirect )
        next()
      else 
        res.status(200)
        res.header('content-type','text/html; charset=utf-8')
        res.body( app.cache.url[ urlpath ] )
        next()
      end
    else
      next()
    end
  end
}