const defaults = {
  amnesicCommandBlocks: false,
  commandNamespaces: false,
  commandSpy: false
}

function inject (bot, options) {
  if (options.features) {
    bot.features = { ...defaults, ...options.features }
    return
  }

  bot.features = { ...defaults }

  bot.on('packet.declare_commands', packet => {
    const rootNode = packet.nodes[0]
    if (!rootNode) return

    for (const nodeIdx of rootNode.children) {
      const node = packet.nodes[nodeIdx]
      if (!node) continue

      const name = node.extraNodeData.name

      if (name) {
        const seperatorIdx = name.indexOf(':')
        if (seperatorIdx !== -1) {
          bot.features.commandNamespaces = true

          const namespace = name.substring(0, seperatorIdx)

          switch (namespace) {
            case 'extras':
              bot.features.amnesicCommandBlocks = true
              break
            case 'commandspy':
              bot.features.commandSpy = true
              break
          }
        }
      }
    }
  })
}

module.exports = inject