class Bitcoin::CLI

  def initialize
    puts "Welcome!"
    menu
  end

  def main_menu_display
    puts ""
    puts "Type 'exit' to quit"
    puts ""
    puts "***** [MAIN MENU] *****"
    puts "* What would you like to do?"
    puts "* [1] Select Symbol"
    puts "* [2] View Currency Information"
    puts "* [3] View Tickers"
    puts "* [4] User Dashboard"
    puts " "
  end

  def menu
    # Display options
    main_menu_display

    input = gets.strip
    symbol_menu   if input == '1'
    currency_menu if input == '2'
    ticker_menu   if input == '3'
    user_menu     if input == '4'
    exit          if input == 'exit'

    puts "Invalid command. Try again."
    menu

  end

  def iti(input)
    input.to_i - 1 # input to index
  end

  # input: array to choose from
  # output: object if choice is valid; -1 if '0', -2 if no choice (only return key is pressed)
  def choose(array)
    puts "Make a selection, or press return to show list"
    choice = gets
    if choice.strip == '0'
      return -2
    elsif choice == "\n" || choice.strip == ""
      return -1
    elsif choice.strip == '00'
      return -3
    elsif choice.strip != '0' && choice.to_i <= array.length
      return array[iti(choice)]
    else
      puts "Invalid selection. Try again"
      choose(array)
    end
  end

  ### TODO: USER SUBMENU ###
  def user_menu
    user_menu_display

    input = gets.strip
    menu if input == '0'
    Bitcoin::Account.show_balances if input == '1'
    Bitcoin::Account.show_deposit_address if input == '2'
    exit if input == 'exit'
    user_menu
  end

  def user_menu_display
    puts ''
    puts 'Type "exit" to quit'
    puts ''
    puts '====== [User Menu] ======'
    puts '| [0] Main Menu'
    puts '| [1] View Account Balances'
    puts '| [2] View Deposit Address...'
    # puts "* [3] Order Menu" # Create New, Cancel, Get by ID, Get History
    # puts "* [4] Trade Menu"
    # puts "* [5] Transfer To / From Bank Account"
    # puts '* [5] Transfer To / From Bank Account'
  end

  ### SYMBOL SUBMENUS ###
  def symbol_menu(symbol = nil)

    # display list & get symbol if it hasn't been selected yet
    if !symbol
      list = Bitcoin::Display.list_by_id(Bitcoin::Ssymbol.all)
      selection = choose(list) #
      menu if selection == -2
      symbol_menu if selection == -1
      symbol = selection
    end

    # display menu options for a symbol
    symbol_menu_display(symbol)

    # route choice to appropriate submenu
    input = gets.strip
    menu                    if input == '0'
    trade_menu(symbol)      if input == '1'
    order_book_menu(symbol) if input == '2'
    candles_menu(symbol)    if input == '3'
    analysis_menu(symbol)   if input == '4'
    exit                    if input == 'exit'
    puts 'nope'
    symbol_menu(symbol) # menu loop after action

  end

  def symbol_menu_display(symbol)
    puts symbol.display_details
    puts ""
    puts "Type 'exit' to quit"
    puts ""
    puts "***** [Symbol Menu] #{symbol.id} *****"
    puts "* [0] Main Menu"
    puts "* [1] View Trades for #{symbol.id}"
    puts "* [2] View Order Book for #{symbol.id}"
    puts "* [3] View Candles for #{symbol.id}"
    puts "* [4] Analysis Mode"
  end

  def trade_menu(symbol, trades_array = nil)
    if !trades_array
      # list all trades for symbol if first time
      trades = Bitcoin::Trade.all(symbol.id)
      Bitcoin::Display.list_trades(trades)
    end

    trade_menu_display

    # User may either: select a trade to view, return to Main Menu, Symbol Menu,
    #   or loop method to show list again
    selection = choose(trades)
    trade_menu(symbol)  if selection == -1
    menu                if selection == -2
    symbol_menu(symbol) if selection == -3

    selection.display_details
    # Loop method without re-listing if action performed sucessfully
    trade_menu(symbol, trades)
  end

  def trade_menu_display
    puts ""
    puts " Type 'exit' to quit"
    puts ""
    puts "***** [Trades Menu] *****"
    puts "* [0] Main Menu"
    puts "* [00] Symbol Menu"
    puts "* [#] Select Entry to View Details"
    puts ""
  end

  def order_book_menu(symbol, orders = nil)
    if !orders
      orders = Bitcoin::OrderBook.all(symbol.id)
      Bitcoin::Display.list_order_book(orders)
    end

    order_book_menu_display

    selection = choose(orders)
    order_book_menu(symbol) if selection == -1
    menu                    if selection == -2
    symbol_menu(symbol)     if selection == -3

    selection.display_details

    order_book_menu(symbol, orders)
  end

  def order_book_menu_display
    puts ""
    puts "  Type 'exit' to quit"
    puts ""
    puts "***** [Order Book Menu] *****"
    puts "* [0] Main Menu"
    puts "* [00] Symbol Menu"
    puts "* [#] Select Entry to View Details"
    puts ""
  end

  def candles_menu(symbol, candles = nil)
    if !candles
      candles = Bitcoin::Candle.all(symbol.id)
      Bitcoin::Display.list_candles(candles)
    end

    candles_menu_display

    selection = choose(candles)
    candles_menu(symbol) if selection == -1
    menu                 if selection == -2
    symbol_menu(symbol)  if selection == -3

    selection.display_details
  end

  def candles_menu_display
    puts ""
    puts "  Type 'exit' to quit"
    puts ""
    puts "***** [Candles Menu] *****"
    puts "* [0] Main Menu"
    puts "* [00] Symbol Menu"
    puts "* [#] Select Entry to View Details"
    puts ""
  end

  ### CURRENCY SUBMENU ###
  def currency_menu(list = nil)
    if !list
      list = Bitcoin::Display.list_by_id(Bitcoin::Currency.all)
    end
    currency_menu_display
    selection = choose(list)
    currency_menu if selection == -1
    menu          if selection == -2

    selection.display_details
    currency_menu(list)
  end

  def currency_menu_display
    puts ""
    puts "  Type 'exit' to quit"
    puts ""
    puts "***** [Currency Menu] *****"
    puts "* [0] Main Menu"
    puts "* [#] Select Entry to View Details"
    puts ""
  end

  ### TICKER SUBMENU ###
  def ticker_menu(list = nil)
    if !list
      list = Bitcoin::Display.list_tickers(Bitcoin::Ticker.all)
    end

    ticker_menu_display

    selection = choose(list)
    ticker_menu if selection == -1
    menu        if selection == -2

    selection.display_details
    ticker_menu(list)
  end

  def ticker_menu_display
    puts ""
    puts "  Type 'exit' to quit"
    puts ""
    puts "***** [Ticker Menu] *****"
    puts "* [0] Main Menu"
    puts "* [#] Select Entry to View Details"
    puts ""
  end

  ### ANALYSIS SUBMENU ###
  def analysis_menu(symbol)

    analysis_menu_display(symbol)

    input = gets.strip
    menu if input == '0'
    symbol_menu(symbol) if input == '00'
    Bitcoin::Analyzer.analyze_trades symbol if input == '1'
    Bitcoin::Analyzer.analyze_candles symbol if input == '2'
    analysis_menu(symbol)
  end

  def analysis_menu_display(symbol)
    puts ""
    puts "  Type 'exit' to quit"
    puts ""
    puts "///// [Analysis Mode - #{symbol.id}] /////"
    puts "/  [0] Main Menu"
    puts "/ [00] Symbol Menu"
    puts "/  [1] Analyze Trades Within Range..."
    puts "/  [2] Analyze Candles Within Range..."
    puts ""
  end

end