# encoding: utf-8

module Github
  class Repos
    module Watching

      # List repo watchers
      #
      # = Examples
      #  @github = Github.new :user => 'user-name', :repo => 'repo-name'
      #  @github.repos.watchers
      #  @github.repos.watchers { |watcher| ... }
      #
      def watchers(user_name, repo_name, params={})
        _update_user_repo_params(user_name, repo_name)
        _validate_user_repo_params(user, repo) unless user? && repo?
        _normalize_params_keys(params)

        response = get("/repos/#{user}/#{repo}/watchers", params)
        return response unless block_given?
        response.each { |el| yield el }
      end

      # List repos being watched by a user
      #
      # = Examples
      #  @github = Github.new
      #  @github.repos.watched :user => 'user-name'
      #
      # List repos being watched by the authenticated user
      #
      # = Examples
      #  @github = Github.new :oauth_token => '...'
      #  @github.repos.watched
      #
      def watched(*args)
        params = args.last.is_a?(Hash) ? args.pop : {}
        _normalize_params_keys(params)
        _merge_user_into_params!(params) unless params.has_key?('user')

        response = if (user_name = params.delete('user'))
          get("/users/#{user_name}/watched", params)
        else
          get("/user/watched", params)
        end
        return response unless block_given?
        response.each { |el| yield el }
      end

      # Check if you are watching a repository
      #
      # Returns <tt>true</tt> if this repo is watched by you, <tt>false</tt> otherwise
      # = Examples
      #  @github = Github.new
      #  @github.repos.watching? 'user-name', 'repo-name'
      #
      def watching?(user_name, repo_name, params={})
        _validate_presence_of user_name, repo_name
        _normalize_params_keys(params)
        get("/user/watched/#{user_name}/#{repo_name}", params)
        true
      rescue Github::Error::NotFound
        false
      end

      # Watch a repository
      #
      # You need to be authenticated to watch a repository
      #
      # = Examples
      #  @github = Github.new
      #  @github.repos.start_watching 'user-name', 'repo-name'
      #
      def start_watching(user_name, repo_name, params={})
        _validate_presence_of user_name, repo_name
        _normalize_params_keys(params)
        put("/user/watched/#{user_name}/#{repo_name}", params)
      end

      # Stop watching a repository
      #
      # You need to be authenticated to stop watching a repository.
      # = Examples
      #  @github = Github.new
      #  @github.repos.start_watching 'user-name', 'repo-name'
      #
      def stop_watching(user_name, repo_name, params={})
        _validate_presence_of user_name, repo_name
        _normalize_params_keys(params)
        delete("/user/watched/#{user_name}/#{repo_name}", params)
      end

    end # Watching
  end # Repos
end # Github