require 'sinatra'
require "sinatra/reloader" if development?
require 'twilio-ruby'
require 'httparty'
require 'json'
require 'did_you_mean'

enable :sessions

configure :development do
  require 'dotenv'
  Dotenv.load
end

get "/" do
	redirect to ("/about")
end

get "/about" do
	"Hi, I am Cheng"
end

get "/sms/incoming" do
  session[:counter] ||= 0
  count = session[:counter]
  sender = params[:From] || ""
  body = params[:Body] || ""

  # session["last_intent"] ||= nil
  # session["users_name"] ||= nil

  message = determine_response body

  # Build a twilio response object
  twiml = Twilio::TwiML::MessagingResponse.new do |r|
    r.message do |m|
      # add the text of the response
      m.body( message )
    end
  end

  # increment the session counter
  session[:counter] += 1

  # send a response to twilio
  content_type 'text/xml'
  twiml.to_s

end

get "/test/sms" do
  client = Twilio::REST::Client.new ENV["TWILIO_ACCOUNT_SID"], ENV["TWILIO_AUTH_TOKEN"]
  #\n means add the words into the new line (\n\n means adding two lines)
  message = "Hello, I am Cheng\nIt works!"

  # this will send a message from any end point
  client.api.account.messages.create(
    from: ENV["TWILIO_FROM"],
    to: ENV["TEST_NUMBER"],
    body: message
  )

  "Test Message Sent"

end

GREETINGS = ["Hello", "Hi", "Hey", "What's up", "Good to see you", "Hey there"]

def determine_response body

	q = body.to_s.downcase.strip

	if q == "hi" or q == "hello" or q == "hey"
    # session["last_intent"] = "hello"
    send_sms_message_to get_greeting + "👋, I am Cheng"
    sleep(3)
    send_sms_message_to "An architecture and computation designer 👨‍💻"
    sleep(3)
		message = "Do you want to know more? or get in touch?"

  elsif q.include? "more"
    # session["last_intent"] = "more"
    send_sms_message_to "Well, I am a graduate student from CMU 👨‍🎓"
    sleep(3)
    send_sms_message_to "My program is master of architecture"
    sleep(3)
    message = "Are you a student? or working already?"

  elsif q.include? "work" or q.include? "student"
    # session["last_intent"] = "ask_if_designer"
    send_sms_message_to "That's cool! It's nice to meet you! 😊"
    sleep(3)
    message = "Are you a designer? or you just feel interested?"

  #elsif session["last_intent"] == "ask_if_designer"
     #if q.include? "design"

     #elsif q.include? "interested"

     #else
     #end
  elsif q.include? "design"
    send_sms_message_to "Wow! I thought so...😊"
    sleep(3)
    send_sms_message_to "I am willing to talk to designers"
    sleep(3)
    send_sms_message_to "I am passionate about architecture design as well as UX&UI design"
    sleep(3)
    message = "Do you design the same or different?"

  elsif q.include? "interest"
    send_sms_message_to "Interesting...I really appreciate your interests in design though"
    sleep(3)
    send_sms_message_to "I guess you might be interested in my projects ✍️"
    sleep(3)
    message = "Do you want to see my projects? or use email to get in touch? 📧"

  elsif q.include? "same"
    send_sms_message_to "Cheers! I am glad to hear that..."
    sleep(3)
    send_sms_message_to "Actually, I think you might be interested in my projects ✍️"
    sleep(3)
    message = "Do you want to see my projects? or use email to get in touch? 📧"

  elsif q.include? "different"
    send_sms_message_to "Nice! Design is a big family! We are all part of it"
    sleep(3)
    send_sms_message_to "Actually, I think you might be interested in my projects ✍️"
    sleep(3)
    message = "Do you want to see my projects? or use email to get in touch? 📧"

  elsif q.include? "project"
    send_sms_message_to "Nice! I studied B.Arch in Zhejiang Sci-Tech University and M.Arch in Carnegie Mellon University"
    sleep(3)
    message = "Do you want to see my projects of bachelor degree? or master degree?"

  elsif q.include? "master"
    send_sms_message_to "Well, there exists one M.Arch project 1️⃣"
    sleep(3)
    send_sms_message_to "5.Environment, form and feedback"
    sleep(3)
    message = "You can type the number to see the details or you can type bachelor to see the others"

  elsif q.include? "bachelor"
    send_sms_message_to "Well, there exist four B.Arch projects 4️⃣"
    sleep(3)
    send_sms_message_to "1.Inspiration Palace\n" + "2.Truemanism\n" + "3.On the Wing\n" + "4.Between the Wall"
    sleep(3)
    message = "You can type the number to see the details or you can type master to see the others"

	elsif q.include? "5"
    send_sms_message_to "Here is the link:\n" + "https://www.behance.net/gallery/91462971/Environment-Form-Feedback"
    sleep(3)
		message = "Do you want to see other bachelor's projects? or contact with me? ✉️"

  elsif q.include? "1"
    send_sms_message_to "Here is the link:\n" + "https://www.behance.net/gallery/91463111/Inspiration-Palace"
    sleep(3)
    message = "Do you want to see other master's projects? or contact with me? ✉️"

  elsif q.include? "2"
    send_sms_message_to "Here is the link:\n" + "https://www.behance.net/gallery/91463147/Truemanism"
    sleep(3)
    message = "Do you want to see other master's projects? or contact with me? ✉️"

  elsif q.include? "3"
    send_sms_message_to "Here is the link:\n" + "https://www.behance.net/gallery/91463363/On-the-Wing"
    sleep(3)
    message = "Do you want to see other master's projects? or contact with me? ✉️"

  elsif q.include? "4"
    send_sms_message_to "Here is the link:\n" + "https://www.behance.net/gallery/91463221/Between-the-Wall"
    sleep(3)
    message = "Do you want to see other master's projects? or contact with me? ✉️"

  elsif q.include? "contact" or q.include? "email" or q.include? "touch"
    send_sms_message_to "That's awesome! 🙌"
    sleep(3)
    message = "Do you want to ask me a question? or talk about the cooperation? 🤝"

  elsif q.include? "cooperation" or q.include? "question"
    send_sms_message_to "Great! I am looking forward to it! 😊"
    sleep(3)
    send_sms_message_to "Here is my email: czhou2@andrew.cmu.edu"
    sleep(3)
    message = "I will respond to you asap!"

	else
    # Sending unexpected answer to the Slack Channel
		send_to_slack q
    send_sms_message_to "Sorry 😢, " + error_response
    sleep(3)
    message = "Could you type your choice again? or say hello to start the conversation"
	end

  message

end

def send_sms_message_to message_body

  client = Twilio::REST::Client.new ENV["TWILIO_ACCOUNT_SID"], ENV["TWILIO_AUTH_TOKEN"]
  # this will send a message from any end point
  client.api.account.messages.create(
    from: ENV["TWILIO_FROM"],
    to: ENV["TEST_NUMBER"],
    body: message_body
  )

end


def error_response
  error_prompt = ["I didn't catch that", "Hmmm I don't know that", "I am confused with that"]
  return error_prompt.sample
end

def get_greeting
  return GREETINGS.sample
end

def send_to_slack message

  # how to use HTTParty
  # response = HTTParty.get('http://myurl.com/path/to/resouce')
  # puts response.body, response.code, response.message, response.headers.inspect
  # response = HTTParty.post('http://myurl.com/path/to/resouce')

  slack_webhook = ENV['SLACK_WEBHOOK']

  formatted_message = "*Recently Received:*\n"
  formatted_message += "#{message} "
  HTTParty.post slack_webhook, body: {text: formatted_message.to_s, username: "ChengBot" }.to_json, headers: {'content-type' => 'application/json'}

end