require 'pod_builder/core'

module PodBuilder
  module Command
    class Deintegrate
      def self.call
        raise "\n\nPodBuilder not initialized!\n".red if !Configuration.exists

        prebuilt_podfile = PodBuilder::basepath("Podfile")
        restored_podfile = PodBuilder::project_path("Podfile")

        FileUtils.cp(prebuilt_podfile, restored_podfile)

        podfile_content = File.read(restored_podfile)
        podfile_lines = []
        pre_install_indx = -1
        podfile_content.each_line.with_index do |line, index|
          if Podfile::PODBUILDER_LOCK_ACTION.detect { |x| Podfile::strip_line(x) == Podfile::strip_line(line) }
            if pre_install_indx == -1
              pre_install_indx = index
            end
          else
            podfile_lines.push(line)
          end
        end

        if pre_install_indx > 0 &&
           Podfile::strip_line(podfile_lines[pre_install_indx - 1]).include?("pre_installdo|") &&
           Podfile::strip_line(podfile_lines[pre_install_indx]) == "end"
           podfile_lines.delete_at(pre_install_indx)
           podfile_lines.delete_at(pre_install_indx - 1)
        end

        FileUtils.rm_f(restored_podfile)

        podfile_content = podfile_lines.join
        
        podfile_content = Podfile.update_path_entries(podfile_content, Deintegrate.method(:podfile_path_transform))
        podfile_content = Podfile.update_project_entries(podfile_content, Deintegrate.method(:podfile_path_transform))
        podfile_content = Podfile.update_require_entries(podfile_content, Deintegrate.method(:podfile_path_transform))

        File.write(restored_podfile, podfile_content)

        PodBuilder::safe_rm_rf(Configuration.base_path)

        Dir.chdir(PodBuilder::project_path)
        bundler_prefix = Configuration.use_bundler ? "bundle exec " : ""
        system("#{bundler_prefix}pod install;")

        license_base = PodBuilder::project_path(Configuration.license_filename)
        FileUtils.rm_f("#{license_base}.plist")
        FileUtils.rm_f("#{license_base}.md")

        update_gemfile

        puts "\n\n🎉 done!\n".green
        return 0
      end

      private

      def self.podfile_path_transform(path)
        use_absolute_paths = false 
        podfile_path = PodBuilder::project_path("Podfile")
        original_basepath = PodBuilder::basepath

        podfile_base_path = Pathname.new(File.dirname(podfile_path))
  
        original_path = Pathname.new(File.join(original_basepath, path))
        replace_path = original_path.relative_path_from(podfile_base_path)
        if use_absolute_paths
          replace_path = replace_path.expand_path(podfile_base_path)
        end
  
        return replace_path
      end    

      def self.update_gemfile
        gemfile_path = File.join(PodBuilder::home, "Gemfile")
        unless File.exist?(gemfile_path)
          FileUtils.touch(gemfile_path)
        end

        podbuilder_line = "gem 'pod-builder'"

        gemfile = File.read(gemfile_path)

        gemfile_lines = gemfile.split("\n")
        gemfile_lines.select! { |x| !trim_gemfile_line(x).include?(trim_gemfile_line(podbuilder_line)) }
        File.write(gemfile_path, gemfile_lines.join("\n"))

        Dir.chdir(PodBuilder::home)
        system("bundle")
      end

      def self.trim_gemfile_line(line)
        return line.gsub("\"", "'").gsub(" ", "")
      end
    end
  end
end