#!/usr/bin/env ruby

require "pupil"
require "pupil/keygen"
require "yaml"
require "fileutils"
require "readline"

class Credentials
  attr_accessor :credentials

  def initialize(file)
    FileUtils.touch file unless FileTest.exists? file
    @credentials_file = file
    @credentials = YAML.load_file(file)
  end

  def save
    YAML.dump(@credentials, File.open(@credentials_file, "w"))
  end
  
  def create
    token = Pupil::Keygen.new.interactive
    @credentials ||= Hash.new
    @credentials.update({token[:screen_name] => token.reject{|k, v| k == :screen_name }})
    self.save
    return token
  end
end

# Initialize
home_dir = `echo $HOME`.strip
eyedrops_dir = File.join(home_dir, ".eyedrops")
credentials_file = File.join(eyedrops_dir, "credentials")

Dir.mkdir eyedrops_dir unless FileTest.exists? eyedrops_dir
cred = Credentials.new(credentials_file)

unless cred.credentials
  cred.create
end

puts "Eyedrops, the interactive twitter with Pupil #{Pupil::VERSION}"

num = 1
cred.credentials.keys.each do |name|
  puts "#{num}. #{name}"
  num += 1
end
puts "#{num}. Add Account"
sel = Readline.readline("Choose account: ", false).to_i
if sel == cred.credentials.keys.size + 1
  cred.create
  sel = cred.credentials.keys.size
end

puts "Preparing Pupil instance..."
pupil = Pupil.new(cred.credentials[cred.credentials.keys[sel-1]])
puts "Signed with @#{cred.credentials.keys[sel-1]}"

while(true)
  begin
    line = Readline.readline("eyedrops> ", true)
    break if line =~ /^(exit|quit)$/

    arr = line.split(" ")
    command = arr.first
    option  = arr[1, arr.size]

    case command.to_sym
    when :help
      puts <<-'EOD'
      ### External Commands ###
      help - Now you typed it.
      exit|quit - Exit eyedrops.
      
      ### Examples ###
      eyedrops> puts pupil.profile.id
      237079012
      => nil
      eyedrops> pupil.timeline :count => 5
      #<Pupil::Status:0x007fafb34b5720>
      #<Pupil::Status:0x007fafb34b56f8>
      #<Pupil::Status:0x007fafb34b56d0>
      #<Pupil::Status:0x007fafb34b56a8>
      #<Pupil::Status:0x007fafb34b5680>
      => nil
      EOD
    else
      result = eval(line)
      puts "=> #{result.inspect}"
    end
  rescue => exception
    puts exception
  end
end