require 'dropbox_sdk'
require 'JenkinsUtil/logger_util'
require 'JenkinsUtil/version'
require 'pathname'

module DropboxUtil
  include LoggerUtil

  attr_reader :uploaded_files

  def self.upload(sources, destination, flatten = true, root = nil)
    LoggerUtil.fatal('Sources passed is nil') if sources.nil?
    LoggerUtil.fatal('Destination passed is nil') if destination.nil?
    LoggerUtil.fatal('Root must be passed if flatten is false') if !flatten && root.nil?
    LoggerUtil.fatal('Please set environment variable DROPBOX_ACCESS_TOKEN') if ENV['DROPBOX_ACCESS_TOKEN'].nil?

    @dropbox_client ||= DropboxClient.new(ENV['DROPBOX_ACCESS_TOKEN'])
    @sources = sources
    @destination = destination
    @flatten = flatten
    @root_path = Pathname.new(root) unless root.nil?

    upload_files
  end

  def self.delete(dropbox_location)
    @dropbox_client ||= DropboxClient.new(JenkinsUtil::DROPBOX_ACCESS_TOKEN)

    LoggerUtil.fatal('Location passed is nil') if dropbox_location.nil?
  end

  def self.upload_files
    LoggerUtil.log.debug(@dropbox_client.account_info.inspect) # Check auth

    @sources.each do |source|
      source = File.join(source, '**', '*') if File.directory?(source)

      Dir.glob(source).each do|file|
        upload_and_share(file)
      end
    end
  rescue DropboxAuthError
    LoggerUtil.fatal('User is not authenticated, please verify access token')
  end

  def self.dropbox_file_destination(file)
    if @flatten
      name_and_extension = File.basename(file)
      dropbox_destination = File.join(@destination, name_and_extension)
    else
      file_path = Pathname.new(file)
      dropbox_destination = File.join(@destination, file_path.relative_path_from(@root_path))
    end

    dropbox_destination
  end

  def self.upload_and_share(file)
    @uploaded_files ||= []

    dropbox_file = @dropbox_client.put_file(dropbox_file_destination(file), open(file), false)
    share = @dropbox_client.shares(dropbox_file['path'])
    
    LoggerUtil.log.info("path: #{dropbox_file['path']}")
    LoggerUtil.log.info("url: #{share['url']}")
  end

  private_class_method :upload_files, :dropbox_file_destination, :upload_and_share
end