# frozen_string_literal: true

# Copyright 2021 YourGiving.co (DBA Tithe.ly)
#
# 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 "json"
require "csv"

module Integrations
  module CLI
    module Command
      class License < Base
        desc "csv", "Generate a CSV file for all dependencies and licenses"
        def csv
          return unless install_dependencies
          install_gem
          create_config
          cache_dependencies
          export_csv
          puts "Finished exporting license metadata to #{csv_path}"
          `open #{csv_path}`
        end

        desc "clean", "Remove license cache and config"
        def clean
          [config_path, cache_path, csv_path].each do |path|
            puts "Removing #{path} ..."
            FileUtils.rm_rf(path) if File.exist?(path)
          end
        end

        private

        def git_root
          @git_root ||= `git rev-parse --show-toplevel`.strip
        end

        def app_name
          @app_name ||= File.basename(git_root)
        end

        def csv_path
          @csv_path ||= File.join(Dir.getwd, "#{app_name}_licenses.csv")
        end

        def install_dependencies
          `which brew`
          has_brew = $?.success?

          %w(cmake pkg-config).each do |library|
            `which #{library}`
            next if $?.success?

            if has_brew
              puts "Installing #{library} with brew..."
              `brew install #{library}`
              unless $?.success?
                puts "Failed to install #{library}"
                return false
              end
            else
              puts "Please install cmake"
              return false
            end
          end

          true
        end

        def install_gem
          if `gem list -i licensed`.strip == "false"
            puts "Installing licensed gem..."
            `gem install licensed`
          end
        end

        def cache_path
          @cache_path ||= File.expand_path(File.join(git_root, '.licenses'))
        end

        def cache_dependencies
          unless Dir.exist?(cache_path)
            puts "Caching licenses..."
            `licensed cache`
          end
        end

        def config_path
          @config ||= File.join(Dir.getwd, ".licensed.yml")
        end

        def create_config
          unless File.exist?(config_path)
            puts "Creating config file #{config_path} ..."
            File.open(config_path, "w") { |f| f.write "name: '#{app_name}'\nsources:\n  bundler: true\n  yarn: true" }
          end
        end

        def json
          @json ||= JSON.parse(`licensed status --format=json`)
        end

        def export_csv
          puts "Exporting licenses to #{csv_path} ..."
          CSV.open(csv_path, "wb") do |out|
            out << ["App", "Source", "Library Name", "Library Version", "License"]
            json["apps"].each do |a|
              a["sources"].each do |s|
                next unless s["dependencies"]

                s["dependencies"].each do |d|
                  app = d["name"].split(".")[0].downcase.gsub(" ", "_")
                  source = d["name"].split(".")[1]
                  library_name = d["name"].split(".")[2].gsub(/-\d+/, "")
                  library_version = d["name"][/-\d+\.\d+\.\d+/].gsub("-", "") if d["name"][/-\d+\.\d+\.\d+/]
                  library_license = d.fetch("errors", []).join(" ").split(": ")[1]
                  errors = d.fetch("errors", []).join(" | ")
                  out << [app, source, library_name, library_version, library_license]
                end
              end
            end
          end
        end
      end
    end
  end
end

require "thor"
require_relative "./cli/command/license"

class Main < Thor
    desc "license <subcommand>", "Dependency license details"
    subcommand "license", Command::License

    # other subcommands #
end