module Pantograph
  class EnvironmentPrinter
    def self.output
      env_info = get

      # Remove sensitive option values
      PantographCore::Configuration.sensitive_strings.compact.each do |sensitive_element|
        env_info.gsub!(sensitive_element, "#########")
      end

      puts(env_info)
      UI.important("Take notice that this output may contain sensitive information, or simply information that you don't want to make public.")
      if PantographCore::Helper.mac? && UI.interactive? && UI.confirm("🙄  Wow, that's a lot of markdown text... should pantograph put it into your clipboard, so you can easily paste it on GitHub?")
        copy_to_clipboard(env_info)
        UI.success("Successfully copied markdown into your clipboard 🎨")
      end
      UI.success("Open https://github.com/pantograph/pantograph/issues/new to submit a new issue ✅")
    end

    def self.get
      UI.important("Generating pantograph environment output, this might take a few seconds...")
      require "pantograph/markdown_table_formatter"
      env_output = ""
      env_output << print_system_environment
      env_output << print_system_locale
      env_output << print_pantograph_files
      env_output << print_loaded_pantograph_gems
      env_output << print_loaded_plugins
      env_output << print_loaded_gems
      env_output << print_date

      # Adding title
      status = (env_output.include?("🚫") ? "🚫" : "✅")
      env_header = "<details><summary>#{status} pantograph environment #{status}</summary>\n\n"
      env_tail = "</details>"
      final_output = ""

      if PantographCore::Globals.captured_output?
        final_output << "### Captured Output\n\n"
        final_output << "Command Used: `#{ARGV.join(' ')}`\n"
        final_output << "<details><summary>Output/Log</summary>\n\n```\n\n#{PantographCore::Globals.captured_output}\n\n```\n\n</details>\n\n"
      end

      final_output << env_header + env_output + env_tail
    end

    def self.print_date
      date = Time.now.strftime("%Y-%m-%d")
      "\n*generated on:* **#{date}**\n"
    end

    def self.print_loaded_plugins
      ENV["PANTOGRAPH_ENV_PRINTER"] = "enabled"
      env_output =  "### Loaded pantograph plugins:\n"
      env_output << "\n"
      plugin_manager = Pantograph::PluginManager.new
      plugin_manager.load_plugins
      if plugin_manager.available_plugins.length <= 0
        env_output << "**No plugins Loaded**\n"
      else
        table = ""
        table << "| Plugin | Version | Update-Status |\n"
        table << "|--------|---------|\n"
        plugin_manager.available_plugins.each do |plugin|
          begin
            installed_version = Pantograph::ActionCollector.determine_version(plugin)
            latest_version = PantographCore::UpdateChecker.fetch_latest(plugin)
            if Gem::Version.new(installed_version) == Gem::Version.new(latest_version)
              update_status = "✅ Up-To-Date"
            else
              update_status = "🚫 Update available"
            end
          rescue
            update_status = "💥 Check failed"
          end
          table << "| #{plugin} | #{installed_version} | #{update_status} |\n"
        end

        rendered_table = MarkdownTableFormatter.new(table)
        env_output << rendered_table.to_md
      end

      env_output << "\n\n"
      env_output
    end

    # We have this as a separate method, as this has to be handled
    # slightly differently, depending on how pantograph is being called
    def self.gems_to_check
      if Helper.contained_pantograph?
        Gem::Specification
      else
        Gem.loaded_specs.values
      end
    end

    def self.print_loaded_pantograph_gems
      # pantographs internal gems
      env_output = "### pantograph gems\n\n"
      table = ""
      table << "| Gem | Version | Update-Status |\n"
      table << "|-----|---------|------------|\n"
      pantograph_tools = Pantograph::TOOLS + [:pantograph_core]

      gems_to_check.each do |current_gem|
        update_status = "N/A"

        next unless pantograph_tools.include?(current_gem.name.to_sym)
        begin
          latest_version = PantographCore::UpdateChecker.fetch_latest(current_gem.name)
          if Gem::Version.new(current_gem.version) >= Gem::Version.new(latest_version)
            update_status = "✅ Up-To-Date"
          else
            update_status = "🚫 Update available"
          end
        rescue
          update_status = "💥 Check failed"
        end
        table << "| #{current_gem.name} | #{current_gem.version} | #{update_status} |\n"
      end

      rendered_table = MarkdownTableFormatter.new(table)
      env_output << rendered_table.to_md

      env_output << "\n\n"

      return env_output
    end

    def self.print_loaded_gems
      env_output = "<details>"
      env_output << "<summary><b>Loaded gems</b></summary>\n\n"

      table = "| Gem | Version |\n"
      table << "|-----|---------|\n"
      gems_to_check.each do |current_gem|
        unless Pantograph::TOOLS.include?(current_gem.name.to_sym)
          table << "| #{current_gem.name} | #{current_gem.version} |\n"
        end
      end
      rendered_table = MarkdownTableFormatter.new(table)

      env_output << rendered_table.to_md
      env_output << "</details>\n\n"
      return env_output
    end

    def self.print_system_locale
      env_output = "### System Locale\n\n"
      found_one = false
      env_table = ""
      ["LANG", "LC_ALL", "LANGUAGE"].each do |e|
        env_icon = "🚫"
        if ENV[e] && ENV[e].end_with?("UTF-8")
          env_icon = "✅"
          found_one = true
        end
        if ENV[e].nil?
          env_icon = ""
        end
        env_table << "| #{e} | #{ENV[e]} | #{env_icon} |\n"
      end
      if !found_one
        table = "| Error |\n"
        table << "|-----|\n"
        table << "| No Locale with UTF8 found 🚫|\n"
      else
        table = "| Variable | Value |  |\n"
        table << "|-----|---------|----|\n"
        table << env_table
      end
      rendered_table = MarkdownTableFormatter.new(table)
      env_output << rendered_table.to_md
      env_output << "\n\n"
    end

    def self.print_system_environment
      require "openssl"

      env_output = "### Stack\n\n"
      product, version, build = "Unknown"
      os_version = "UNKNOWN"

      if Helper.mac?
        product, version, build = `sw_vers`.strip.split("\n").map { |line| line.split(':').last.strip }
        os_version = version
      end

      if Helper.linux?
        # this should work on pretty much all linux distros
        os_version = `uname -a`.strip
        version = ""
        build = `uname -r`.strip
        product = `cat /etc/issue.net`.strip

        distro_guesser = {
          fedora: "/etc/fedora-release",
          debian_based: "/etc/debian_version",
          suse: "/etc/SUSE-release",
          mandrake: "/etc/mandrake-release"
        }

        distro_guesser.each do |dist, vers|
          os_version = "#{dist} " + File.read(vers).strip if File.exist?(vers)
          version = os_version
        end
      end

      table_content = {
        "pantograph" => Pantograph::VERSION,
        "OS" => os_version,
        "Ruby" => RUBY_VERSION,
        "Bundler?" => Helper.bundler?,
        "Git" => `git --version`.strip.split("\n").first,
        "Installation Source" => anonymized_path($PROGRAM_NAME),
        "Host" => "#{product} #{version} (#{build})",
        "Ruby Lib Dir" => anonymized_path(RbConfig::CONFIG['libdir']),
        "OpenSSL Version" => OpenSSL::OPENSSL_VERSION,
        "Is contained" => Helper.contained_pantograph?.to_s,
        "Is homebrew" => Helper.homebrew?.to_s
      }

      if Helper.mac?
        table_content["Xcode Path"] = anonymized_path(Helper.xcode_path)
        begin
          table_content["Xcode Version"] = Helper.xcode_version
        rescue => ex
          UI.error(ex)
          UI.error("Could not get Xcode Version")
        end
      end

      table = ["| Key | Value |"]
      table += table_content.collect { |k, v| "| #{k} | #{v} |" }

      begin
        rendered_table = MarkdownTableFormatter.new(table.join("\n"))
        env_output << rendered_table.to_md
      rescue => ex
        UI.error(ex)
        UI.error("Error rendering markdown table using the following text:")
        UI.message(table.join("\n"))
        env_output << table.join("\n")
      end

      env_output << "\n\n"
      env_output
    end

    def self.print_pantograph_files
      env_output = "### pantograph files:\n\n"

      pantograph_path = PantographCore::PantographFolder.pantfile_path

      if pantograph_path && File.exist?(pantograph_path)
        env_output << "<details>"
        env_output << "<summary>`#{pantograph_path}`</summary>\n"
        env_output << "\n"
        env_output << "```ruby\n"
        env_output <<  File.read(pantograph_path, encoding: "utf-8")
        env_output <<  "\n```\n"
        env_output << "</details>"
      else
        env_output << "**No Pantfile found**\n"
      end
      env_output << "\n\n"
      env_output
    end

    def self.anonymized_path(path, home = ENV['HOME'])
      return home ? path.gsub(%r{^#{home}(?=/(.*)|$)}, '~\2') : path
    end

    # Copy a given string into the clipboard
    # Make sure to ask the user first, as some people don't
    # use a clipboard manager, so they might lose something important
    def self.copy_to_clipboard(string)
      require 'open3'
      Open3.popen3('pbcopy') { |input, _, _| input << string }
    end
  end
end