# frozen_string_literal: true

require "sorted_set"
require_relative "directory"
# This module provides classes for the Makit gem.
module Makit
  # This class provide methods for working with the system Environment.
  #
  class Environment
    def self.which(name)
      return name if File.exist?(name)

      ["", ".exe", ".bat", ".cmd"].each do |ext|
        aname = name + ext
        return aname if File.exist?(aname)

        ENV["PATH"].split(File::PATH_SEPARATOR).each do |path|
          apath = "#{path.gsub("\\", "/")}/#{aname}".gsub("//", "/")
          return apath if File.exist?(apath)
        end
      end
      ""
    end

    def self.constants_hash
      constants = {}
      # collect all constants that are all uppercase
      Object.constants.each { |c| constants[c] = Object.const_get(c) if c == c.upcase } #	puts "#{c} = #{Object.const_get(c)}" }
      #Object.constants.each { |c| constants[c] = Object.const_get(c)}#	puts "#{c} = #{Object.const_get(c)}" }
      constants
    end

    def self.rake_file_name
      caller_locations.each do |location|
        return location.absolute_path if location.absolute_path&.end_with?("Rakefile")
      end
      nil
    end

    def self.gem_data_directory
      gem_data_directory = File.join(Dir.home, ".makit")
    end

    def self.project_root_directory
      if !Makit::Environment.rake_file_name.nil?
        File.dirname(Makit::Environment.rake_file_name)
      else
        Makit::Directory.find_directory_with_pattern(File.dirname(__FILE__), "Rakefile")
        # lass Directory
        #  def self.find_directory_with_pattern(starting_directory, pattern)
        # nil
      end
    end

    def self.get_relative_directory(url)
      url = url.gsub("https://", "").gsub("http://", "")
      url = url.gsub("gitlab.com", "gitlab")
      url
    end

    def self.get_code_root
      # user home directory  + "code"
      code_root = File.join(Dir.home, "code")
    end

    def self.get_work_directory(url)
      raise "invalid url" if !url.include? "https://"
      url = url.gsub("https://", "").gsub("http://", "")
      #url = url.gsub("gitlab.com","gitlab")
      url
    end

    def self.is_windows?
      RbConfig::CONFIG["host_os"] =~ /mswin|msys|mingw|cygwin|bccwin|wince|emc/
    end

    def self.is_mac?
      RbConfig::CONFIG["host_os"] =~ /darwin/
    end

    def self.get_os
      case RbConfig::CONFIG["host_os"]
      when /linux/
        "Linux"
      when /darwin/
        "macOS"
      when /mswin|msys|mingw|cygwin|bccwin|wince|emc/
        "Windows"
      else
        "Unknown"
      end
    end

    def self.get_runtime_identifier()
      os = RbConfig::CONFIG["host_os"]
      cpu = RbConfig::CONFIG["host_cpu"]

      case os
      when /mswin|msys|mingw|cygwin|bccwin|wince|emc/
        os_rid = "win"
      when /darwin|mac os/
        os_rid = "osx"
      when /linux/
        os_rid = "linux"
      when /solaris|bsd/
        os_rid = "unix"
      else
        raise "Unknown operating system: host_os=#{os}"
      end

      case cpu
      when /x86_64|amd64|x64/
        arch_rid = "x64"
      when /i686|i386/
        arch_rid = "x86"
        #when /arm/
        #  arch_rid = "arm"
      when /aarch64|arm64/
        arch_rid = "arm64"
      else
        raise "Unknown architecture: host_cpu=#{cpu}"
      end

      "#{os_rid}-#{arch_rid}"
    end
  end
end