# TODO: Write documentation for `Flint`

require "option_parser"

require "./brainfuck/*"
require "./brainfuck/parser.cr"

module Flint
  VERSION = "0.1.0"

  def self.main
    execution_mode = :interpret
    chosen_language = nil
    memory_size = nil
    source_file = nil

    parser = OptionParser.new do |parser|
      parser.banner = "Basic usage: flint [LANGUAGE] [OPTIONS] [FILE]"

      parser.on("brainfuck", "select brainfuck as the language") do
        chosen_language = :brainfuck
        memory_size = Brainfuck::DEFAULT_TAPE_SIZE

        parser.banner = "Useage: flint brainfuck [OPTIONS] [FILE]"
        parser.on("-t CELLS", "--tape-size=CELLS", "specify the number of memory cells in the tape, defaults to 30,000") { nil }
      end

      parser.on("-h", "--help", "show this help and exit") do
        puts parser
        exit(0)
      end
      parser.on("-i", "--interpet", "interpet the provided source code, implied by default, overridden by '-c' or '--compile'") { nil }
      parser.on("-c", "--compile", "produce a binary or different source code file instead of interpeting the code, overrides an explicit '-i' or '--intepret' flag") do
        execution_mode = :compile
      end

      parser.unknown_args do |_args|
        source_file = _args[0] unless _args.empty?
      end
    end

    parser.parse

    if chosen_language.nil?
      puts "ERROR: No language chosen"
      puts parser
      exit(1)
    end

    if source_file.nil?
      puts "ERROR: No source file chosen"
      puts parser
      exit(1)
    end

    # temporary
    puts execution_mode
    puts chosen_language
    puts memory_size
    puts source_file
  end
end

Flint.main