module Octokit
  class Client

    # Methods for the Issues API
    #
    # @see http://developer.github.com/v3/issues/
    module Issues

      # List issues for a the authenticated user or repository
      #
      # @param repository [String, Repository, Hash] A GitHub repository.
      # @param options [Sawyer::Resource] A customizable set of options.
      # @option options [Integer] :milestone Milestone number.
      # @option options [String] :state (open) State: <tt>open</tt> or <tt>closed</tt>.
      # @option options [String] :assignee User login.
      # @option options [String] :creator User login.
      # @option options [String] :mentioned User login.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @option options [String] :sort (created) Sort: <tt>created</tt>, <tt>updated</tt>, or <tt>comments</tt>.
      # @option options [String] :direction (desc) Direction: <tt>asc</tt> or <tt>desc</tt>.
      # @option options [Integer] :page (1) Page number.
      # @return [Array<Sawyer::Resource>] A list of issues for a repository.
      # @see http://developer.github.com/v3/issues/#list-issues-for-this-repository
      # @example List issues for a repository
      #   Octokit.list_issues("sferik/rails_admin")
      # @example List issues for the authenticted user across repositories
      #   @client = Octokit::Client.new(:login => 'foo', :password => 'bar')
      #   @client.list_issues
      def list_issues(repository = nil, options = {})
        path = ''
        path = "repos/#{Repository.new(repository)}" if repository
        path += "/issues"

        paginate path, options
      end
      alias :issues :list_issues

      # List all issues across owned and member repositories for the authenticated user
      #
      # @param options [Sawyer::Resource] A customizable set of options.
      # @option options [String] :filter (assigned) State: <tt>assigned</tt>, <tt>created</tt>, <tt>mentioned</tt>, <tt>subscribed</tt> or <tt>closed</tt>.
      # @option options [String] :state (open) State: <tt>open</tt> or <tt>all</tt>.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @option options [String] :sort (created) Sort: <tt>created</tt>, <tt>updated</tt>, or <tt>comments</tt>.
      # @option options [String] :direction (desc) Direction: <tt>asc</tt> or <tt>desc</tt>.
      # @option options [Integer] :page (1) Page number.
      # @option options [String] :since Timestamp in ISO 8601
      #   format: YYYY-MM-DDTHH:MM:SSZ
      # @return [Array<Sawyer::Resource>] A list of issues for a repository.
      # @see http://developer.github.com/v3/issues/#list-issues
      # @example List issues for the authenticted user across owned and member repositories
      #   @client = Octokit::Client.new(:login => 'foo', :password => 'bar')
      #   @client.user_issues
      def user_issues(options = {})
        paginate 'user/issues', options
      end

      # List all issues for a given organization for the authenticated user
      #
      # @param org [String] Organization GitHub username.
      # @param options [Sawyer::Resource] A customizable set of options.
      # @option options [String] :filter (assigned) State: <tt>assigned</tt>, <tt>created</tt>, <tt>mentioned</tt>, <tt>subscribed</tt> or <tt>closed</tt>.
      # @option options [String] :state (open) State: <tt>open</tt> or <tt>all</tt>.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @option options [String] :sort (created) Sort: <tt>created</tt>, <tt>updated</tt>, or <tt>comments</tt>.
      # @option options [String] :direction (desc) Direction: <tt>asc</tt> or <tt>desc</tt>.
      # @option options [Integer] :page (1) Page number.
      # @option options [String] :since Timestamp in ISO 8601
      #   format: YYYY-MM-DDTHH:MM:SSZ
      # @return [Array<Sawyer::Resource>] A list of issues for a repository.
      # @see http://developer.github.com/v3/issues/#list-issues
      # @example List issues for the authenticted user across owned and member repositories
      #   @client = Octokit::Client.new(:login => 'foo', :password => 'bar')
      #   @client.user_issues
      def org_issues(org, options = {})
        paginate "orgs/#{org}/issues", options
      end

      # Create an issue for a repository
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param title [String] A descriptive title
      # @param body [String] A concise description
      # @param options [Hash] A customizable set of options.
      # @option options [String] :assignee User login.
      # @option options [Integer] :milestone Milestone number.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @return [Sawyer::Resource] Your newly created issue
      # @see http://developer.github.com/v3/issues/#create-an-issue
      # @example Create a new Issues for a repository
      #   Octokit.create_issue("sferik/rails_admin", 'Updated Docs', 'Added some extra links')
      def create_issue(repo, title, body, options = {})
        options[:labels] = case options[:labels]
                           when String
                             options[:labels].split(",").map(&:strip)
                           when Array
                             options[:labels]
                           end
        post "repos/#{Repository.new(repo)}/issues", options.merge({:title => title, :body => body})
      end
      alias :open_issue :create_issue

      # Get a single issue from a repository
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [String] Number ID of the issue
      # @return [Sawyer::Resource] The issue you requested, if it exists
      # @see http://developer.github.com/v3/issues/#get-a-single-issue
      # @example Get issue #25 from pengwynn/octokit
      #   Octokit.issue("pengwynn/octokit", "25")
      def issue(repo, number, options = {})
        get "repos/#{Repository.new(repo)}/issues/#{number}", options
      end

      # Close an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [String] Number ID of the issue
      # @param options [Hash] A customizable set of options.
      # @option options [String] :assignee User login.
      # @option options [Integer] :milestone Milestone number.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @return [Sawyer::Resource] The updated Issue
      # @see http://developer.github.com/v3/issues/#edit-an-issue
      # @example Close Issue #25 from pengwynn/octokit
      #   Octokit.close_issue("pengwynn/octokit", "25")
      def close_issue(repo, number, options = {})
        patch "repos/#{Repository.new(repo)}/issues/#{number}", options.merge({:state => "closed"})
      end

      # Reopen an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [String] Number ID of the issue
      # @param options [Hash] A customizable set of options.
      # @option options [String] :assignee User login.
      # @option options [Integer] :milestone Milestone number.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @return [Sawyer::Resource] The updated Issue
      # @see http://developer.github.com/v3/issues/#edit-an-issue
      # @example Reopen Issue #25 from pengwynn/octokit
      #   Octokit.reopen_issue("pengwynn/octokit", "25")
      def reopen_issue(repo, number, options = {})
        patch "repos/#{Repository.new(repo)}/issues/#{number}", options.merge({:state => "open"})
      end

      # Update an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [String] Number ID of the issue
      # @param title [String] Updated title for the issue
      # @param body [String] Updated body of the issue
      # @param options [Hash] A customizable set of options.
      # @option options [String] :assignee User login.
      # @option options [Integer] :milestone Milestone number.
      # @option options [String] :labels List of comma separated Label names. Example: <tt>bug,ui,@high</tt>.
      # @option options [String] :state State of the issue. <tt>open</tt> or <tt>closed</tt>
      # @return [Sawyer::Resource] The updated Issue
      # @see http://developer.github.com/v3/issues/#edit-an-issue
      # @example Change the title of Issue #25
      #   Octokit.update_issue("pengwynn/octokit", "25", "A new title", "the same body"")
      def update_issue(repo, number, title, body, options = {})
        patch "repos/#{Repository.new(repo)}/issues/#{number}", options.merge({:title => title, :body => body})
      end

      # Get all comments attached to issues for the repository
      #
      # By default, Issue Comments are ordered by ascending ID.
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param options [Hash] Optional parameters
      # @option options [String] :sort created or updated
      # @option options [String] :direction asc or desc. Ignored without sort
      #   parameter.
      # @option options [String] :since Timestamp in ISO 8601
      #   format: YYYY-MM-DDTHH:MM:SSZ
      #
      # @return [Array<Sawyer::Resource>] List of issues comments.
      #
      # @see http://developer.github.com/v3/issues/comments/#list-comments-in-a-repository
      #
      # @example Get the comments for issues in the octokit repository
      #   @client.issues_comments("pengwynn/octokit")
      #
      # @example Get issues comments, sort by updated descending since a time
      #   @client.issues_comments("pengwynn/octokit", {
      #     :sort => 'desc',
      #     :direction => 'asc',
      #     :since => '2010-05-04T23:45:02Z'
      #   })
      def issues_comments(repo, options = {})
        paginate "repos/#{Repository.new repo}/issues/comments", options
      end

      # Get all comments attached to an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [String] Number ID of the issue
      # @return [Array<Sawyer::Resource>] Array of comments that belong to an issue
      # @see http://developer.github.com/v3/issues/comments
      # @example Get comments for issue #25 from pengwynn/octokit
      #   Octokit.issue_comments("pengwynn/octokit", "25")
      def issue_comments(repo, number, options = {})
        paginate "repos/#{Repository.new(repo)}/issues/#{number}/comments", options
      end

      # Get a single comment attached to an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [String] Number ID of the comment
      # @return [Sawyer::Resource] The specific comment in question
      # @see http://developer.github.com/v3/issues/comments/#get-a-single-comment
      # @example Get comment #1194549 from an issue on pengwynn/octokit
      #   Octokit.issue_comments("pengwynn/octokit", 1194549)
      def issue_comment(repo, number, options = {})
        paginate "repos/#{Repository.new(repo)}/issues/comments/#{number}", options
      end

      # Add a comment to an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [Integer] Issue number
      # @param comment [String] Comment to be added
      # @return [Sawyer::Resource] Comment
      # @see http://developer.github.com/v3/issues/comments/#create-a-comment
      # @example Add the comment "Almost to v1" to Issue #23 on pengwynn/octokit
      #   Octokit.add_comment("pengwynn/octokit", 23, "Almost to v1")
      def add_comment(repo, number, comment, options = {})
        post "repos/#{Repository.new(repo)}/issues/#{number}/comments", options.merge({:body => comment})
      end

      # Update a single comment on an issue
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [Integer] Comment number
      # @param comment [String] Body of the comment which will replace the existing body.
      # @return [Sawyer::Resource] Comment
      # @see http://developer.github.com/v3/issues/comments/#edit-a-comment
      # @example Update the comment #1194549 with body "I've started this on my 25-issue-comments-v3 fork" on an issue on pengwynn/octokit
      #   Octokit.update_comment("pengwynn/octokit", 1194549, "Almost to v1, added this on my fork")
      def update_comment(repo, number, comment, options = {})
        patch "repos/#{Repository.new(repo)}/issues/comments/#{number}", options.merge({:body => comment})
      end

      # Delete a single comment
      #
      # @param repo [String, Repository, Hash] A GitHub repository
      # @param number [Integer] Comment number
      # @return [Boolean] Success
      # @see http://developer.github.com/v3/issues/comments/#delete-a-comment
      # @example Delete the comment #1194549 on an issue on pengwynn/octokit
      #   Octokit.delete_comment("pengwynn/octokit", 1194549)
      def delete_comment(repo, number, options = {})
        boolean_from_response :delete, "repos/#{Repository.new(repo)}/issues/comments/#{number}", options
      end
    end
  end
end