local util    = require('util')
local apiSync = require('apiSync')

app.on('init', function()
  app.plugin.openbrush.api = apiSync.init( 'openbrush' )
end)

local function scanTiltFile(exp)
  if exp.path:lower():match(".tilt$") then
    app.markViewable(exp)
  end
end

local function scanForOpenBrush(exp)
  local tags = app.plugin.openbrush.tags
  if not tags then
    tags = util.split( app.opts.plugin_openbrush_sync_hashtag, ' ')
    table.insert( tags,"openbrush")
    app.plugin.openbrush.tags = tags
  end
  foreach( tags, function(k,tag)  
    tag = tag:gsub("#","")
    if exp.path:match('/' .. tag .. '/') then -- might not be precise enough
      if not exp.parent.janusxr then 
        exp.parent.janusxr = {}
      end
      exp.parent.janusxr.room = app.opts.plugin_openbrush_wrap_room
      exp.parent.portal_width = tonumber( app.opts.plugin_openbrush_portal_width )
      exp.parent.grid_size = tonumber( app.opts.plugin_openbrush_grid_size )
      exp.parent.layout = app.opts.plugin_openbrush_layout
    end
  end)
  scanTiltFile(exp)
end


app.on('scan_experience', scanForOpenBrush )
app.on('scan_experience_file', scanForOpenBrush ) 
app.on("scan_experience_janusxr", function(opts) scanForOpenBrush(opts.exp) end)

app.on('set', function(k,v)
end)

local sync_URL = app.opts_plugin_openbrush_sync_URL or ''

-- this registers the plugin UI
local plugin = {
  name = "OpenBrush",
  infowide = true,
  info = [[
    <img src="img/openbrush.png" style="width:50%; max-width:233px; display:inline-block; float:left; margin-right:20px;"/>
    <a href="https://openbrush.app/" target="_blank">OpenBrush</a> lets you paint in 3D space with virtual reality.<br>
    XRForge's webviewer (<a href="https://github.com/jbaicoianu/janusweb">JanusWeb</a>) supports interconnecting OpenBrush projects via 3D portals or a grid.<br/>
    OpenBrush projects are stored in a (selfhosted) <a href="https://icosa.gallery" target="_blank">icosa.gallery</a> instance, which can be configured below.<br><br>
    <b>NOTE:</b> for collective virtualworld building use <b>hashtags in project-titles</b>. Each hashtag will become its own folder, which allows for <a href="/about#autocompose">crowdsourcing/combining scenes</a> designed in openbrush.
    ]],
  --buttons = {
  --  { label = "resync now!", href="/reset" }
  --},
  opts = {
    { 
      key='app.opts.plugin_openbrush_wrap_room',
      title='Wrap VR space',
      info='render 3D files in <a href="https://coderofsalvation.github.io/janus-guide/#/build/room" target="_blank">janusxr.xml</a> room',
      default="",
      values= app.plugin.janusxr.opts[4].values -- reuse rooms from janusxr plugin
    },
    { 
      key='app.opts.plugin_openbrush_layout',
      title='Layout assets',
      info='NOTE: use #overlay in asset-title to skip layout (sky/floor/e.g.)',
      default="grid", 
      values={portals="As portals", grid="As grid"}
    },
    { 
      key='app.opts.plugin_openbrush_layout_grid_size',
      title='Grid size',
      info='in square meters (only used for grid layout)',
      default="75", 
      placeholder="75", 
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_strategy',
      title='How to sync',
      info='download assets locally (prevent linkrot)',
      default = "mirror",
      values={mirror="mirror locally"}
    },
    { 
      key='app.opts.plugin_openbrush_sync_when',
      title='Sync interval',
      info='when to sync?',
      default = "boot",
      values={disabled="disabled", boot="on boot", hourly="hourly", daily="daily"}
    },
    { 
      key='app.opts.plugin_openbrush_sync_folder',
      title='Sync to folder',
      info='openbrush (icosa.gallery) assets will be saved here',
      placeholder = "openbrush",
      default = app.opts.plugin_diskscan_dir,
      values = {}
    },
    { 
      key='app.opts.plugin_openbrush_sync_folder_thumbnail',
      title='Thumbnail',
      info='URL of Thumbnail for folder/portal',
      placeholder = "img/openbrush.png",
      default = "img/openbrush.png",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_portal_width',
      title='Portal spacing',
      info='Spacing between portals (prevent thumbnail-overlap)',
      placeholder = "4.2",
      default = "4.2",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_URL',
      title='Icosa gallery URL',
      info='public/selfhosted <a href="https://github.com/icosa-foundation/icosa-gallery target="_blank">icosa.gallery</a> server-instance',
      placeholder = "icosa.gallery",
      default = "icosa.gallery",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_hashtag',
      title='tags',
      info=( sync_URL and 'space-separated tags will generate their own folders' or ''),
      default = "#xrforge",
      placeholder = "#xrforge",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_category',
      title='category',
      info=( sync_URL and 'space-separated, leave empty or see <a href="https://api.' .. sync_URL .. '/v1/docs#/Assets/icosa_api_assets_get_assets">API docs</a>' or ''),
      placeholder = "ART",
      default = "",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_keywords',
      title='keywords',
      info=( sync_URL and 'space-separated, leave empty or see <a href="https://api.' .. sync_URL .. '/v1/docs#/Assets/icosa_api_assets_get_assets">API docs</a>' or ''),
      placeholder = "xrforge",
      default = "",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_triangle_max',
      title='Polygons maximum',
      info=( sync_URL and 'performance-cap, leave empty or see <a href="https://api.' .. sync_URL .. '/v1/docs#/Assets/icosa_api_assets_get_assets">API docs</a>' or ''),
      placeholder = "10000",
      default = "",
      values=''
    },
    { 
      key='app.opts.plugin_openbrush_sync_license',
      title='License',
      info='filter assets on specific license',
      default = "",
      values={ [""]="", ALL_CC="CreateCommons (ALL)"}
    },
    { 
      key='app.opts.plugin_openbrush_sync_author',
      title='Author name',
      info='space-separated: filter assets on specific Author name',
      placeholder='sarah',
      default = "",
      values=""
    },
    { 
      key='app.opts.plugin_openbrush_sync_authorid',
      title='Author id',
      info='space-separated: filter assets on specific Author id',
      placeholder='9e8b98fbe',
      default = "",
      values=""
    },
    { 
      key='app.opts.plugin_openbrush_sync_maxitems',
      title='Max latest items',
      info='limit the total amount of result',
      placeholder='3',
      default = "3",
      values=""
    },
    { 
      key='app.opts.plugin_openbrush_sync_collection',
      title='In collection',
      info='should assets be part of a collection?',
      default = "disabled",
      values={enabled="yes", disabled="no"}
    }
  },

  -- expected by src/.lua/apiSync.lua
  apiCall = function(tag)
    return 'https://api.' .. app.opts.plugin_openbrush_sync_URL .. '/v1/assets?xrforge=' .. EscapeFragment(app.host) 
           .. '&xrforge_strategy=' .. EscapeFragment(app.opts.plugin_openbrush_sync_strategy)
           .. '&time=' .. tostring( os.time() )
           .. (tag and #tag > 0 and '&keywords=' .. EscapeFragment(tag) or '')
           .. (#app.opts.plugin_openbrush_sync_category     > 0 and '&category=' .. EscapeFragment(app.opts.plugin_openbrush_sync_category) or '')
           .. (#app.opts.plugin_openbrush_sync_keywords     > 0 and '&keywords=' .. EscapeFragment(app.opts.plugin_openbrush_sync_keywords) or '')
           .. (#app.opts.plugin_openbrush_sync_triangle_max > 0 and '&triangleCountMax=' .. EscapeFragment(app.opts.plugin_openbrush_sync_triangle_max) or '')
           .. (#app.opts.plugin_openbrush_sync_license      > 0 and '&license=' .. app.opts.plugin_openbrush_sync_license or '' )
           .. (app.opts.plugin_openbrush_sync_collection == 'enabled' and '&inCollection=true' or '' )
           .. (#app.opts.plugin_openbrush_sync_maxitems > 0 and '&pageSize=' .. EscapeFragment(app.opts.plugin_openbrush_sync_maxitems) or '' )
           -- TODO: filter AFTER the request
           -- .. (#app.opts.plugin_openbrush_sync_author > 0 and '&authorName=' .. EscapeFragment(app.opts.plugin_openbrush_sync_author) or '')
           -- .. (#app.opts.plugin_openbrush_sync_authorid > 0 and '&authorId=' .. EscapeFragment(app.opts.plugin_openbrush_sync_authorid) or '')
  end,

  getFolder = function(tag)
    local folder = app.opts.plugin_openbrush_sync_folder 
    if tag then 
      folder = folder .. '/' .. util.hyphenate(tag)
    end
    return folder
  end,

  -- expected by src/.lua/apiSync.lua
  fetch = function(url,opts)
    opts = opts or {}
    if not opts.body then
      local ok, headers, body = Fetch( url )
      if not ok then 
        return print("[openbrush.lua] error: could not fetch: " .. app.plugin.openbrush.apiCall(tag))
      end
      opts.body = body
    end
    return DecodeJson(opts.body)
  end,

  -- expected by src/.lua/apiSync.lua
  download = function(t,tag)
    local me = app.plugin.openbrush
    local synced = 0
    foreach( t.assets, function(k,asset) 
      if type(asset) == 'table' then
        local dirname       = '_' .. asset.assetId .. '-' .. util.hyphenate( asset.displayName)
        local dirnameFull   = me.getFolder(tag) .. '/' .. dirname
        local jsonfile      = dirnameFull .. '/asset.json'
        local sync          = true
        local assetPrevious = false
        local f             = false

        function preferFormat(f) 
          local found = false
          foreach( asset.formats, function(k,v)
            if v.formatType == f then 
              found = v
            end
          end)
          return found
        end
          
        f = preferFormat('TILT')
        if not f then f = preferFormat('GLTF2') end
        if not f then f = preferFormat('GLTF1') end
        if not f then f = preferFormat('OBJ') end
        if f then 
          if not util.fileExist( dirnameFull ) then
            os.execute("mkdir -p " .. dirnameFull)
          end

          if util.fileExist(jsonfile) then
            assetPrevious = DecodeJson( util.readfile(jsonfile) ) 
            if util.parseIsoDate(asset.updateTime) == util.parseIsoDate(assetPrevious.updateTime) then 
              sync = false -- already finished
            end 
          end
          if sync then
            print('✅ ' .. asset.displayName .. ' (syncing) #openbrush')
            util.writefile( jsonfile, EncodeJson(asset) )
            local rootfile      = dirnameFull .. '/' .. f.root.url:gsub(".*/","") 
            local thumbnailfile = ''
            if asset.thumbnail and asset.thumbnail.url then 
              thumbnailfile = dirnameFull .. '.' .. asset.thumbnail.url:gsub(".*%.",'')
              print('🤞 fetch ' .. asset.thumbnail.url)
              os.execute('wget "' ..asset.thumbnail.url .. '" -O "' .. thumbnailfile .. '"')
            end
            print('🤞 fetch ' .. f.root.url)
            os.execute('wget "' .. f.root.url .. '" -O "' .. rootfile .. '"')
            if #f.resources > 0 then
              foreach( f.resources, function(k,resource)
                local file = dirnameFull .. '/' .. resource.url:gsub(".*/","") 
                print('🤞 fetch ' .. resource.url)
                os.execute('wget "' .. resource.url .. '" -O "' .. file .. '"')
              end)
            end
            synced = synced + 1
          else
            print('ℹ️ ' .. asset.displayName .. ' (up to date) #openbrush')
          end
        else
          print('[openbrush.lua] error: no suitable format found for ' .. asset.displayName .. ' ' .. asset.assetId)
        end
      end
    end, true)
    return synced
  end
}

if not util.cmdExist('wget') then 
  plugin.info = plugin.info .. '<br><br><b>NOTE:</b> wget command not installed..plugin is disabled'
end

return plugin