require_relative 'store'
require_relative 'api'

module Hackpad
  module Cli
    class UndefinedPad < StandardError
    end
    class UnknownFormat < StandardError
    end

    class Pad

      attr_reader :id, :content, :guest_policy, :moderated, :cached_at

      def initialize(id)
        @id = id
      end

      def title
        @title ||= (@content.lines.first.strip if @content)
      end

      def chars
        @content.length if @content
      end

      def lines
        @content.lines.count if @content
      end

      def load(ext, refresh = false, save = true)
        fail UnknownFormat unless FORMATS.include? ext
        fail UndefinedPad unless @id
        if refresh || !Store.exists?(ext, @id)
          load_from_api ext, save
        else
          load_from_cache ext
        end
      end

      def load_from_api(ext, dosave = true)
        @content = Api.read @id, ext
        dosave && Store.save(self, ext)
        options = Api.read_options @id
        @guest_policy = options['options']['guestPolicy']
        @moderated = options['options']['isModerated']
        options['cached_at'] = Time.now
        @cached_at = options['cached_at']
        dosave && Store.save_options(@id, options)
      end

      def load_from_cache(ext)
        @content = Store.read @id, ext
        options = Store.read_options @id
        @guest_policy = options['options']['guestPolicy']
        @moderated = options['options']['isModerated']
        @cached_at = options['cached_at']
      end

      def cached?
        Store.exists? 'meta', @id
      end

    end
  end
end