#!/usr/bin/env ruby
# frozen_string_literal: true

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'curses'
  gem 'ruby-termios', require: 'termios'
end

require 'myhunt'

def display_curses( field, state = { dead: false, victory: false } )
  Curses.setpos 0, 0

  if state[:dead]
    Curses.addstr 'You died! :(    '
  elsif state[:victory]
    Curses.addstr 'You won!! :)    '
  else
    Curses.addstr "#{field.number_of_mines} mines, #{field.count_nearby_mines} nearby"
  end

  field.height.times do |y|
    Curses.setpos y + 2, 0
    field.width.times do |x|
      if [field.explorer_x, field.explorer_y] == [x, y]
        Curses.addstr 'O'
      elsif [field.width, field.height] == [x + 1, y + 1]
        Curses.addstr '^'
      elsif field.field[[x, y]].open || state[:dead] || state[:victory]
        Curses.addstr field.field[[x, y]].mine ? '*' : ' '
      else
        Curses.addstr '-'
      end
    end
  end

  Curses.refresh
end

def ncurses_main( number_of_mines )
  field = MyHunt::Board.new( number_of_mines )
  finished = false

  Curses.init_screen
  Curses.cbreak
  Curses.noecho
  Curses.stdscr.keypad = true

  orig_termios = Termios.tcgetattr($stdin)
  at_exit do
    # Curses.close_screen
    Termios.tcsetattr($stdin, Termios::TCSANOW, orig_termios)
  end

  display_curses( field )

  loop do
    direction = ''
    ch = Curses.getch
    if finished
      begin
        case ch
        when 'r'
          field = MyHunt::Board.new( number_of_mines )
          finished = false
        else
          break
        end
      rescue Curses::RequestDeniedError
        'prout'
      end
    else
      begin
        case ch
        when '1'
          direction = 'down-left'
        when '2', Curses::KEY_DOWN
          direction = 'down'
        when '3'
          direction = 'down-right'
        when '4', Curses::KEY_LEFT
          direction = 'left'
        when '6', Curses::KEY_RIGHT
          direction = 'right'
        when '7'
          direction = 'up-left'
        when '8', Curses::KEY_UP
          direction = 'up'
        when '9'
          direction = 'up-right'
        when 'q'
          break
        end
      rescue Curses::RequestDeniedError
        'prout'
      end
    end

    state = field.move( direction )
    finished = state[:dead] || state[:victory]
    display_curses( field, state )
  end

  exit!
end

number_of_mines = 20
number_of_mines = ARGV.first.to_i if ARGV.length == 1

ncurses_main( number_of_mines )