# The MIT License (MIT)
#
# Copyright (c) 2016 ITO SOFT DESIGN Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

require 'active_support/core_ext/string/inflections'
require 'yaml'
require 'json'
require 'protocol/protocol'
require 'erb'

include LadderDrive::Protocol::Mitsubishi
include LadderDrive::Protocol::Keyence
include LadderDrive::Protocol::Omron
include LadderDrive::Protocol::Emulator

module LadderDrive

  class LadderDriveConfig

    class << self

      def default
        @config ||= begin
          load File.join("config", "plc.yml")
        end
      end

      def load path
        h = {}
        if File.exist?(path)
          erb = ERB.new File.read(path)
          h = YAML.load(erb.result(binding))
          h = JSON.parse(h.to_json, symbolize_names: true)
        end
        new h || {}
      end

    end

    def initialize options={}
      default = {
        input: "asm/main.asm",
        output: "build/main.hex",
      }
      emulator_default = {
        host: "localhost",
        port: 5555,
        protocol: "emu_protocol",
        keep: [
          ["L0", "L1023"],
          ["H0", "H1023"],
        ],
      }
      raspberrypi_default = {
        host: "localhost",
        port: 5555,
        protocol: "emu_protocol",
        keep: [
          ["L0", "L1023"],
          ["H0", "H1023"],
        ],
        io: {
          inputs: {
            x0: 4,
            x1: 17,
            x2: 27,
            x3: 22,
            x4: 5,
            x5: 6,
            x6: 13,
            x7: 19,
            x8: 26,
          },
          outputs: {
=begin
            y0: 18,
            y1: 23,
            y2: 24,
            y3: 25,
            y4: 12,
            y5: 16,
            y6: 20,
            y7: 21,
=end
          }
        },
      }

      @config = default.merge options
      @config[:plc] ||= {}
      @config[:plc][:emulator] = @config[:plc][:emulator] ? emulator_default.merge(@config[:plc][:emulator]) : emulator_default
      @config[:plc][:raspberrypi] = @config[:plc][:raspberrypi] ? emulator_default.merge(@config[:plc][:raspberrypi]) : raspberrypi_default

      @config[:default] ||= {}

      @targets = {}
    end

    def [] key
      @config[key]
    end

    def target name=nil
      name ||= (@config[:default][:target] || :emulator)
      name = name.to_sym if name.is_a? String
      target = @targets[name]
      unless target
        h = @config[:plc][name]
        unless h.nil? || h.empty?
          h = {name:name}.merge h
          target = LadderDriveConfigTarget.new h
          @targets[name] = target
        end
      end
      target
    end

    def method_missing(name, *args)
      name = name.to_s unless name.is_a? String
      case name.to_s
      when /(.*)=$/
        @config[$1.to_sym] = args.first
      else
        @config[name.to_sym]
      end
    end

  end

end