module Pantograph
  module Actions
    module SharedValues
      SET_GITHUB_RELEASE_HTML_LINK = :SET_GITHUB_RELEASE_HTML_LINK
      SET_GITHUB_RELEASE_RELEASE_ID = :SET_GITHUB_RELEASE_RELEASE_ID
      SET_GITHUB_RELEASE_JSON = :SET_GITHUB_RELEASE_JSON
    end

    class SetGithubReleaseAction < Action
      def self.run(params)
        UI.important("Creating release of #{params[:repository_name]} on tag \"#{params[:tag_name]}\" with name \"#{params[:name]}\".")
        UI.important("Will also upload assets #{params[:upload_assets]}.") if params[:upload_assets]

        repo_name = params[:repository_name]
        api_token = params[:api_token]
        server_url = params[:server_url]
        tag_name = params[:tag_name]

        payload = {
          'tag_name' => params[:tag_name],
          'name' => params[:name],
          'body' => params[:description],
          'draft' => !!params[:is_draft],
          'prerelease' => !!params[:is_prerelease]
        }
        payload['target_commitish'] = params[:commitish] if params[:commitish]

        GithubApiAction.run(
          server_url: server_url,
          api_token: api_token,
          http_method: 'POST',
          path: "repos/#{repo_name}/releases",
          body: payload,
          error_handlers: {
            422 => proc do |result|
              UI.error(result[:body])
              UI.error("Release on tag #{tag_name} already exists!")
              return nil
            end,
            404 => proc do |result|
              UI.error(result[:body])
              UI.user_error!("Repository #{repo_name} cannot be found, please double check its name and that you provided a valid API token (GITHUB_API_TOKEN)")
            end,
            401 => proc do |result|
              UI.error(result[:body])
              UI.user_error!("You are not authorized to access #{repo_name}, please make sure you provided a valid API token (GITHUB_API_TOKEN)")
            end,
            '*' => proc do |result|
              UI.error("GitHub responded with #{result[:status]}:#{result[:body]}")
              return nil
            end
          }
        ) do |result|
          json = result[:json]
          html_url = json['html_url']
          release_id = json['id']

          UI.success("Successfully created release at tag \"#{tag_name}\" on GitHub")
          UI.important("See release at \"#{html_url}\"")

          Actions.lane_context[SharedValues::SET_GITHUB_RELEASE_HTML_LINK] = html_url
          Actions.lane_context[SharedValues::SET_GITHUB_RELEASE_RELEASE_ID] = release_id
          Actions.lane_context[SharedValues::SET_GITHUB_RELEASE_JSON] = json

          assets = params[:upload_assets]
          if assets && assets.count > 0
            # upload assets
            self.upload_assets(assets, json['upload_url'], api_token)

            # fetch the release again, so that it contains the uploaded assets
            GithubApiAction.run(
              server_url: server_url,
              api_token: api_token,
              http_method: 'GET',
              path: "repos/#{repo_name}/releases/#{release_id}",
              error_handlers: {
                '*' => proc do |get_result|
                  UI.error("GitHub responded with #{get_result[:status]}:#{get_result[:body]}")
                  UI.user_error!("Failed to fetch the newly created release, but it *has been created* successfully.")
                end
              }
            ) do |get_result|
              Actions.lane_context[SharedValues::SET_GITHUB_RELEASE_JSON] = get_result[:json]
              UI.success("Successfully uploaded assets #{assets} to release \"#{html_url}\"")
              return get_result[:json]
            end
          else
            return json || result[:body]
          end
        end
      end

      def self.upload_assets(assets, upload_url_template, api_token)
        assets.each do |asset|
          self.upload(asset, upload_url_template, api_token)
        end
      end

      def self.upload(asset_path, upload_url_template, api_token)
        # if it's a directory, zip it first in a temp directory, because we can only upload binary files
        absolute_path = File.absolute_path(asset_path)

        # check that the asset even exists
        UI.user_error!("Asset #{absolute_path} doesn't exist") unless File.exist?(absolute_path)

        if File.directory?(absolute_path)
          Dir.mktmpdir do |dir|
            tmpzip = File.join(dir, File.basename(absolute_path) + '.zip')
            sh("cd \"#{File.dirname(absolute_path)}\"; zip -r --symlinks \"#{tmpzip}\" \"#{File.basename(absolute_path)}\" 2>&1 >/dev/null")
            self.upload_file(tmpzip, upload_url_template, api_token)
          end
        else
          self.upload_file(absolute_path, upload_url_template, api_token)
        end
      end

      def self.upload_file(file, url_template, api_token)
        require 'addressable/template'
        file_name = File.basename(file)
        expanded_url = Addressable::Template.new(url_template).expand(name: file_name).to_s
        headers = { 'Content-Type' => 'application/zip' } # works for all binary files
        UI.important("Uploading #{file_name}")
        GithubApiAction.run(
          api_token: api_token,
          http_method: 'POST',
          headers: headers,
          url: expanded_url,
          raw_body: File.read(file),
          error_handlers: {
            '*' => proc do |result|
              UI.error("GitHub responded with #{result[:status]}:#{result[:body]}")
              UI.user_error!("Failed to upload asset #{file_name} to GitHub.")
            end
          }
        ) do |result|
          UI.success("Successfully uploaded #{file_name}.")
        end
      end

      #####################################################
      # @!group Documentation
      #####################################################

      def self.description
        "This will create a new release on GitHub and upload assets for it"
      end

      def self.details
        [
          "Creates a new release on GitHub. You must provide your GitHub Personal token (get one from [https://github.com/settings/tokens/new](https://github.com/settings/tokens/new)), the repository name and tag name. By default, that's `master`.",
          "If the tag doesn't exist, one will be created on the commit or branch passed in as commitish.",
          "Out parameters provide the release's id, which can be used for later editing and the release HTML link to GitHub. You can also specify a list of assets to be uploaded to the release with the `:upload_assets` parameter."
        ].join("\n")
      end

      def self.available_options
        [
          PantographCore::ConfigItem.new(key: :repository_name,
                                       env_name: "FL_SET_GITHUB_RELEASE_REPOSITORY_NAME",
                                       description: "The path to your repo, e.g. 'pantograph/pantograph'",
                                       verify_block: proc do |value|
                                         UI.user_error!("Please only pass the path, e.g. 'pantograph/pantograph'") if value.include?("github.com")
                                         UI.user_error!("Please only pass the path, e.g. 'pantograph/pantograph'") if value.split('/').count != 2
                                       end),
          PantographCore::ConfigItem.new(key: :server_url,
                                       env_name: "FL_GITHUB_RELEASE_SERVER_URL",
                                       description: "The server url. e.g. 'https://your.internal.github.host/api/v3' (Default: 'https://api.github.com')",
                                       default_value: "https://api.github.com",
                                       optional: true,
                                       verify_block: proc do |value|
                                         UI.user_error!("Please include the protocol in the server url, e.g. https://your.github.server/api/v3") unless value.include?("//")
                                       end),
          PantographCore::ConfigItem.new(key: :api_token,
                                       env_name: "FL_GITHUB_RELEASE_API_TOKEN",
                                       description: "Personal API Token for GitHub - generate one at https://github.com/settings/tokens",
                                       sensitive: true,
                                       code_gen_sensitive: true,
                                       type: String,
                                       default_value: ENV["GITHUB_API_TOKEN"],
                                       default_value_dynamic: true,
                                       optional: false),
          PantographCore::ConfigItem.new(key: :tag_name,
                                       env_name: "FL_SET_GITHUB_RELEASE_TAG_NAME",
                                       description: "Pass in the tag name",
                                       type: String,
                                       optional: false),
          PantographCore::ConfigItem.new(key: :name,
                                       env_name: "FL_SET_GITHUB_RELEASE_NAME",
                                       description: "Name of this release",
                                       type: String,
                                       optional: true),
          PantographCore::ConfigItem.new(key: :commitish,
                                       env_name: "FL_SET_GITHUB_RELEASE_COMMITISH",
                                       description: "Specifies the commitish value that determines where the Git tag is created from. Can be any branch or commit SHA. Unused if the Git tag already exists. Default: the repository's default branch (usually master)",
                                       type: String,
                                       optional: true),
          PantographCore::ConfigItem.new(key: :description,
                                       env_name: "FL_SET_GITHUB_RELEASE_DESCRIPTION",
                                       description: "Description of this release",
                                       type: String,
                                       optional: true,
                                       default_value: Actions.lane_context[SharedValues::FL_CHANGELOG],
                                       default_value_dynamic: true),
          PantographCore::ConfigItem.new(key: :is_draft,
                                       env_name: "FL_SET_GITHUB_RELEASE_IS_DRAFT",
                                       description: "Whether the release should be marked as draft",
                                       optional: true,
                                       default_value: false,
                                       is_string: false),
          PantographCore::ConfigItem.new(key: :is_prerelease,
                                       env_name: "FL_SET_GITHUB_RELEASE_IS_PRERELEASE",
                                       description: "Whether the release should be marked as prerelease",
                                       optional: true,
                                       default_value: false,
                                       is_string: false),
          PantographCore::ConfigItem.new(key: :upload_assets,
                                       env_name: "FL_SET_GITHUB_RELEASE_UPLOAD_ASSETS",
                                       description: "Path to assets to be uploaded with the release",
                                       optional: true,
                                       is_string: false,
                                       type: Array,
                                       verify_block: proc do |value|
                                         UI.user_error!("upload_assets must be an Array of paths to assets") unless value.kind_of?(Array)
                                       end)
        ]
      end

      def self.output
        [
          ['SET_GITHUB_RELEASE_HTML_LINK', 'Link to your created release'],
          ['SET_GITHUB_RELEASE_RELEASE_ID', 'Release id (useful for subsequent editing)'],
          ['SET_GITHUB_RELEASE_JSON', 'The whole release JSON object']
        ]
      end

      def self.return_value
        [
          "A hash containing all relevant information of this release",
          "Access things like 'html_url', 'tag_name', 'name', 'body'"
        ].join("\n")
      end

      def self.return_type
        :hash_of_strings
      end

      def self.authors
        ["czechboy0", "tommeier"]
      end

      def self.is_supported?(platform)
        true
      end

      def self.example_code
        [
          'github_release = set_github_release(
            repository_name: "pantograph/pantograph",
            api_token: ENV["GITHUB_TOKEN"],
            name: "Super New actions",
            tag_name: "v1.22.0",
            description: (File.read("changelog") rescue "No changelog provided"),
            commitish: "master",
            upload_assets: ["example_integration.ipa", "./pkg/built.gem"]
          )'
        ]
      end

      def self.category
        :source_control
      end
    end
  end
end