local util = require('util')

app.on('scan_experience', function(exp)
  --print_r(exp)
end)

app.on('scan_experience_file', function(exp)
  local me = app.plugin.convert
  if me.assimp then 
    local filetypes_in  = app.opts.plugin_convert_assimp_filetypes_in:gsub("  "," ")
    local filetypes_out = app.opts.plugin_convert_assimp_filetypes_out:gsub("  "," ")
    local convert = false
    foreach( util.split( filetypes_in , ' '), function(k,ext)
      ext = ext:gsub("%W", "")
      if exp.path:lower():match( "." .. ext:lower() .. "$") then
        convert = true
      end
    end)
    if convert then 
      foreach( util.split( filetypes_out , ' '), function(k,ext)
        ext = ext:gsub("%W", "")
        local outfile = exp.path .. '.' .. ext 
        local fullpath = exp.file.fullpath .. '.' .. ext
        local flags   = ''
        if ext:lower() == 'glb' then flags = flags .. ' --embed-textures' end
        if not util.fileExist(outfile) then
          print('> assimp export ' .. exp.file.fullpath .. ' ' .. fullpath )
          local ok = os.execute('assimp export ' .. exp.file.fullpath .. ' ' .. fullpath )
          if ok then 
            -- notify extra file to plugins
            local stat,err = unix.stat(outfile)
            if not err then
              app.pub("scan_experience_file", nil, util.merge( exp, {
                parent = exp.parent,
                path = outfile,
                url = "/" .. util.stripPath(outfile),
                id = outfile,
                file = {stat=stat, ino = stat:ino(), attr=stat, fullpath=fullpath}
              }))
            end
          end
        end
      end)
    end
  end
end)

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

-- this registers the plugin UI
local plugin = {
  name = "Conversion",
  info = 'Auto-convert (older) 3D fileformats to newer ones, by generating sidecarfiles (foo.x3d.glb e.g.) via <a href="https://assimp.org" target="_blank">assimp</a>',
  opts = {
    { 
      key='app.opts.plugin_convert_assimp_filetypes_in',
      title='from filetype',
      info='Space-separated 3D File extensions for assimp to process, <a href="http://lua-users.org/wiki/PatternsTutorial" target="_blank">lua patterns</a> are allowed',
      default = "x3d",
      placeholder = "",
      values=''
    },
    { 
      key='app.opts.plugin_convert_assimp_filetypes_out',
      title='to filetype',
      info='Space-separated 3D File extensions for assimp to process, <a href="http://lua-users.org/wiki/PatternsTutorial" target="_blank">lua patterns</a> are allowed',
      default = 'glb',
      values=''
    },
  },
}

if util.cmdExist('assimp') then 
  plugin.assimp = true
  local stdout, retstr, retcode = util.execute('assimp listext')
  plugin.filetypes = stdout:gsub(";%*."," ")
  plugin.info = "<br><b class='tag'>assimp detected</b>&nbsp;<br>" .. plugin.info .. '<br><b>Supported filetypes</b>: '
  foreach( util.split( plugin.filetypes, ' '), function(k,ext)
    plugin.info = plugin.info .. '<b class="tag">' .. ext .. '</b>&nbsp;'
  end)
else
  plugin.info = plugin.info .. "<br><br><b>NOTE:</b> <a href='https://assimp.org' target='_blank'>assimp</a> is not installed on this system: please install." 

end


return plugin