require "commander"
require "../hence"

CLI = Commander::Command.new do |cmd|
  cmd.use = "hence"
  cmd.long = "Hence assembler and emulator"

  cmd.run do
    puts cmd.help
  end

  # ameba:disable Lint/ShadowingOuterLocalVar
  cmd.commands.add do |cmd|
    cmd.use = "version"
    cmd.short = "Prins current hence version"
    cmd.long = cmd.short

    cmd.run do
      puts Hence::VERSION
    end
  end

  # ameba:disable Lint/ShadowingOuterLocalVar
  cmd.commands.add do |cmd|
    cmd.use = "firmware"
    cmd.short = "Firmware utility"
    cmd.long = cmd.short

    cmd.flags.add do |flag|
      flag.name = "file"
      flag.long = "--file"
      flag.default = false
      flag.description = "Load firmware from file"
      flag.persistent = true
    end

    # ameba:disable Lint/ShadowingOuterLocalVar
    cmd.commands.add do |cmd|
      cmd.use = "ls"
      cmd.short = "Lists available firmwares"
      cmd.long = cmd.short

      cmd.run do
        puts Hence::Firmware::FIRMWARES.keys.join("\n")
      end
    end

    # ameba:disable Lint/ShadowingOuterLocalVar
    cmd.commands.add do |cmd|
      cmd.use = "compile <firmware> [out]"
      cmd.short = "Compiles a firmware"
      cmd.long = cmd.short

      cmd.flags.add do |flag|
        flag.name = "dump"
        flag.long = "--dump"
        flag.default = false
        flag.description = "Hexdumps the firmware"
      end

      cmd.run do |opts, args|
        bin = if opts.bool["file"]
                Hence::Firmware.from_yaml(File.read(args[0]))
              else
                Hence::Firmware::FIRMWARES[args[0]]
              end.compile(Hence::Microcode::MICROCODE_NAMES)
        File.write(args[1], bin) if args[1]?

        puts bin.hexdump if opts.bool["dump"]
      end
    end

    # ameba:disable Lint/ShadowingOuterLocalVar
    cmd.commands.add do |cmd|
      cmd.use = "doc <firmware> [out]"
      cmd.short = "Generates documentation for a firmware"
      cmd.long = cmd.short

      cmd.flags.add do |flag|
        flag.name = "dump"
        flag.long = "--dump"
        flag.default = false
        flag.description = "Hexdumps the firmware"
      end

      cmd.run do |opts, args|
        doc = if opts.bool["file"]
                Hence::Firmware.from_yaml(File.read(args[0]))
              else
                Hence::Firmware::FIRMWARES[args[0]]
              end.to_s
        File.write(args[1], doc) if args[1]?

        puts doc if opts.bool["dump"]
      end
    end
  end

  # ameba:disable Lint/ShadowingOuterLocalVar
  cmd.commands.add do |cmd|
    cmd.use = "parse <src>"
    cmd.short = "Parses source code"
    cmd.long = cmd.short

    cmd.run do |_opts, args|
      # ameba:disable Lint/DebugCalls
      pp Hence::Parser.parse(File.read(args[0]))
    end
  end

  # ameba:disable Lint/ShadowingOuterLocalVar
  cmd.commands.add do |cmd|
    cmd.use = "assemble <src> [out]"
    cmd.short = "Compiles assembly code into a binary"
    cmd.long = cmd.short

    cmd.flags.add do |flag|
      flag.name = "firmware"
      flag.short = "-f"
      flag.long = "--firmware"
      flag.default = "default"
      flag.description = "Custom firmware"
    end

    cmd.flags.add do |flag|
      flag.name = "file"
      flag.long = "--file"
      flag.default = false
      flag.description = "Load firmware from YAML definition file"
    end

    cmd.flags.add do |flag|
      flag.name = "dump"
      flag.long = "--dump"
      flag.default = false
      flag.description = "Hexdumps the binary"
    end

    cmd.run do |opts, args|
      bin = Hence::Assembler.assemble(
        Hence::Parser.parse(File.read(args[0])),
        if opts.bool["file"]
          Hence::Firmware.from_yaml(File.read(opts.string["file"]))
        else
          Hence::Firmware::FIRMWARES[opts.string["firmware"]]
        end.build_opcodes[:names],
        Hence::Assembler::Data.new(Path[args[0]])
      )

      File.write(args[1], bin) if args[1]?
      puts bin.hexdump if opts.bool["dump"]
    end
  end

  # ameba:disable Lint/ShadowingOuterLocalVar
  cmd.commands.add do |cmd|
    cmd.use = "run <bin>"
    cmd.short = "Runs a binary"
    cmd.long = cmd.short

    cmd.flags.add do |flag|
      flag.name = "firmware"
      flag.short = "-f"
      flag.long = "--firmware"
      flag.default = "default"
      flag.description = "Custom firmware"
    end

    cmd.flags.add do |flag|
      flag.name = "file"
      flag.long = "--file"
      flag.default = false
      flag.description = "Load firmware from file"
    end

    cmd.run do |opts, args|
      bin = Bytes.new({{ 32 * 1024 }})
      File.open(args[0]) do |file|
        file.gets_to_end.to_slice.copy_to(bin)
      end

      Hence::Emulator.emulate(
        Hence::Emulator::Data.new(
          bin,
          if opts.bool["file"]
            buffer = Bytes.new({{ 32 * 1024 }})
            File.open(opts.string["firmware"]) do |file|
              file.gets_to_end.to_slice.copy_to(buffer)
            end

            buffer
          else
            Hence::Firmware::FIRMWARES[opts.string["firmware"]].compile(Hence::Microcode::MICROCODE_NAMES)
          end
        )
      )
    end
  end
end

Commander.run(CLI, ARGV)