# frozen_string_literal: true

module Cryptum
  # Cryptum::UI Module used for Presenting the
  # Cryptum Curses Interface
  module UI
    # Update the Ticker section of the UI
    module Ticker
      public_class_method def self.refresh(opts = {})
        start_time = opts[:start_time]
        ticker_win = opts[:ticker_win]
        event_history = opts[:event_history]
        event = opts[:event]

        order_book = event_history.order_book
        this_product = order_book[:this_product]
        quote_increment = this_product[:quote_increment]
        fiat_smallest_decimal = quote_increment.to_s.split('.')[-1].length

        symbol_out = this_product[:id]
        fiat = this_product[:quote_currency].to_sym
        fiat_symbol = '?'
        fiat_symbol = '$' if fiat == :USD
        fiat_symbol = "\u20ac" if fiat == :EUR

        last_ticker_price = order_book[:ticker_price].to_f
        second_to_last_ticker_price = order_book[:ticker_price_second_to_last].to_f

        sequence = event[:sequence].to_i
        last_sequence = order_book[:sequence].to_i
        order_book[:sequence] = sequence

        return unless sequence >= last_sequence

        # Useful for detecting dropped messages but it's usually a lot.
        # if last_sequence + 1 < sequence
        #   sequence_diff = sequence - last_sequence
        #   File.open('/tmp/cryptum-errors.txt', 'a') do |f|
        #     f.puts Time.now.strftime('%Y-%m-%d %H:%M:%S.%N%z')
        #     f.puts "Module: #{self}"
        #     f.puts 'Messages likely dropped:'
        #     f.puts "This Sequence: #{sequence}"
        #     f.puts "Last Sequence: #{last_sequence}"
        #     f.puts "Sequence Diff: #{sequence_diff}\n\n\n"
        #   end
        # end

        open_24h = event[:open_24h].to_f
        order_book[:open_24h] = open_24h

        open_24h_out = "#{Cryptum.open_symbol} #{fiat_symbol}#{Cryptum.beautify_large_number(value: format("%0.#{fiat_smallest_decimal}f", open_24h))}"

        beautify_ticker = Cryptum.beautify_large_number(
          value: format("%0.#{fiat_smallest_decimal}f", event[:price].to_f)
        )
        ticker_fmt = "#{fiat_symbol}#{beautify_ticker}"
        if last_ticker_price.zero?
          ticker_price_color = :white
          ticker_price_out = "#{Cryptum.flat_arrow} #{ticker_fmt}"
        elsif last_ticker_price < event[:price].to_f
          ticker_price_color = :green
          ticker_price_out = "#{Cryptum.up_arrow} #{ticker_fmt}"
        elsif last_ticker_price > event[:price].to_f
          ticker_price_color = :red
          ticker_price_out = "#{Cryptum.down_arrow} #{ticker_fmt}"
        else
          ticker_price_color = :yellow
          ticker_price_out = "#{Cryptum.flat_arrow} #{ticker_fmt}"
        end

        order_book[:ticker_price_third_to_last] = format("%0.#{fiat_smallest_decimal}f", second_to_last_ticker_price)
        order_book[:ticker_price_second_to_last] = format("%0.#{fiat_smallest_decimal}f", last_ticker_price)
        order_book[:ticker_price] = format("%0.#{fiat_smallest_decimal}f", event[:price].to_f)

        volume_24h = format('%0.7f', event[:volume_24h])
        volume_24h_out = Cryptum.beautify_large_number(
          value: volume_24h
        )
        order_book[:volume_24h] = volume_24h

        volume_30d = format('%0.7f', event[:volume_30d])
        volume_30d_out = Cryptum.beautify_large_number(
          value: volume_30d
        )

        high_24h = format(
          "%0.#{fiat_smallest_decimal}f",
          event[:high_24h]
        )
        high_24h_out = Cryptum.beautify_large_number(
          value: high_24h
        )
        order_book[:high_24h] = high_24h

        low_24h = format(
          "%0.#{fiat_smallest_decimal}f",
          event[:low_24h]
        )
        low_24h_out = Cryptum.beautify_large_number(
          value: low_24h
        )
        order_book[:low_24h] = low_24h
        margin_percent_open_24h = (1 - (open_24h / order_book[:ticker_price].to_f)) * 100

        beautify_margin_percent_open_24h = Cryptum.beautify_large_number(
          value: format('%0.4f', margin_percent_open_24h)
        )
        if margin_percent_open_24h.positive?
          margin_percent_open_24h_color = :green
          trend = 'BULL'
          margin_percent_open_24h_out = "#{Cryptum.up_arrow} #{beautify_margin_percent_open_24h}% (#{trend})"
        elsif margin_percent_open_24h.negative?
          # Space removed to account for negative number.
          margin_percent_open_24h_color = :red
          trend = 'BEAR'
          margin_percent_open_24h_out = "#{Cryptum.down_arrow}#{beautify_margin_percent_open_24h}% (#{trend})"
        else
          trend = 'FLAT'
          margin_percent_open_24h_color = :yellow
          margin_percent_open_24h_out = "#{Cryptum.flat_arrow} #{beautify_margin_percent_open_24h}% (#{trend})"
        end

        order_history = order_book[:order_history]
        open_sell_orders = order_history.select do |order|
          order[:status] == 'open' && order[:side] == 'sell'
        end

        sorted_open_sell_orders = open_sell_orders.sort_by do |order|
          order[:price].to_f
        end

        lowest_selling_price = event_history.lowest_selling_price
        lowest_selling_price = sorted_open_sell_orders.first[:price] unless sorted_open_sell_orders.empty?
        event_history.lowest_selling_price = lowest_selling_price.to_f

        highest_selling_price = event_history.highest_selling_price
        highest_selling_price = sorted_open_sell_orders.last[:price] unless sorted_open_sell_orders.empty?
        event_history.highest_selling_price = highest_selling_price.to_f

        lowest_selling_price_out = Cryptum.beautify_large_number(
          value: format(
            "%0.#{fiat_smallest_decimal}f",
            lowest_selling_price
          )
        )

        highest_selling_price_out = Cryptum.beautify_large_number(
          value: format(
            "%0.#{fiat_smallest_decimal}f",
            highest_selling_price
          )
        )

        # event_history.order_book = order_book
        # TODO: Everything Above this Line Needs to be Indicators ^

        # UI
        col_just1 = 15
        col_just2 = 14
        col_just3 = 21
        col_just3_alt = (Curses.cols - Cryptum::UI.col_third) - 1
        col_just4 = (Curses.cols - Cryptum::UI.col_fourth) - 1

        # ROW 1
        out_line_no = 0
        Cryptum::UI.line(
          ui_win: ticker_win,
          out_line_no: out_line_no
        )

        out_line_no += 1
        ticker_win.setpos(out_line_no, Cryptum::UI.col_first)
        ticker_win.clrtoeol
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :yellow,
          style: :bold,
          string: symbol_out.ljust(col_just1)
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_second)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: margin_percent_open_24h_color,
          style: :bold,
          string: margin_percent_open_24h_out.ljust(col_just2)
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_third)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :blue,
          style: :bold,
          string: open_24h_out.ljust(col_just3)
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_fourth)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: ticker_price_color,
          style: :bold,
          string: ticker_price_out.rjust(col_just4)
        )

        # ROW 2
        out_line_no += 1
        ticker_win.setpos(out_line_no, Cryptum::UI.col_first)
        ticker_win.clrtoeol
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :white,
          style: :bold,
          string: 'High | Low Limit Sell Prices:'
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_third)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :white,
          style: :bold,
          string: "$#{highest_selling_price_out} | $#{lowest_selling_price_out}".rjust(
            col_just3_alt,
            '.'
          )
        )

        # ROW 2
        out_line_no += 1
        ticker_win.setpos(out_line_no, Cryptum::UI.col_first)
        ticker_win.clrtoeol
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :green,
          style: :bold,
          string: '24 Hr High:'
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_third)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :green,
          string: "#{Cryptum.up_arrow} #{fiat_symbol}#{high_24h_out}".rjust(col_just3_alt, '.')
        )

        # ROW 3
        out_line_no += 1
        ticker_win.setpos(out_line_no, Cryptum::UI.col_first)
        ticker_win.clrtoeol
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :red,
          string: '24 Hr Low:'
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_third)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :red,
          string: "#{Cryptum.down_arrow} #{fiat_symbol}#{low_24h_out}".rjust(col_just3_alt, '.')
        )

        # ROW 4
        out_line_no += 1
        ticker_win.setpos(out_line_no, Cryptum::UI.col_first)
        ticker_win.clrtoeol
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :blue,
          style: :bold,
          string: '24 Hr | 30 Day Market Volume:'
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_third)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :blue,
          string: "#{volume_24h_out} | #{volume_30d_out}".rjust(col_just3_alt, '.')
        )

        # ROW 5
        out_line_no += 1
        ticker_win.setpos(out_line_no, Cryptum::UI.col_first)
        ticker_win.clrtoeol
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :cyan,
          style: :bold,
          string: 'Start Time:'
        )

        ticker_win.setpos(out_line_no, Cryptum::UI.col_third)
        Cryptum::UI.colorize(
          ui_win: ticker_win,
          color: :cyan,
          string: start_time.rjust(col_just3_alt, '.')
        )

        ticker_win.refresh

        event_history
      rescue Interrupt, StandardError => e
        Cryptum::Log.append(level: :error, msg: e, which_self: self, event_history: event_history)
      end

      # Display Usage for this Module
      public_class_method def self.help
        puts "USAGE:
          #{self}.refresh(
            symbol: 'required - Symbol for this Session (e.g. btc-usd)',
            order_book: 'required - Order Book Data Structure',
            event: 'required - Event from Coinbase Web Socket'
          )
        "
      end
    end
  end
end