require "amaranth/request"
require "open-uri"

module Amaranth
  class Video < Struct.new(:id, :title, :description, :duration, :primary_audio_language_code, :thumbnail, :team, :project, :all_urls, :languages)
    def self.all team_slug: nil, project_slug: nil
      url = "https://www.amara.org/api/videos/?limit=100"
      url += "&team=#{team_slug}" if team_slug
      url += "&project=#{project_slug}" if project_slug
      fetch(url).map do |attributes|
        new attributes.keep_if { |key, value| members.include? key.to_sym }
      end
    end

    private_class_method def self.fetch url
      json = JSON.parse(open(url).read)
      objects = json["objects"]
      next_url = json["meta"]["next"]
      objects += fetch(next_url) if next_url
      objects
    end

    def self.create attributes
      Request.post("/api/videos/", attributes)
    end

    def self.find_by_video_url video_url
      if json = Request.get("/api/videos/?video_url=#{video_url}")
        attributes = json["objects"].first
        new attributes.keep_if { |key, value| members.include? key.to_sym }
      end
    end

    def self.create_or_update_by_video_url video_url, attributes
      Amaranth::Video.create attributes.merge(video_url: video_url)
    rescue Amaranth::RequestError => exception
      raise unless exception.message.include?("Video already exists")
      Amaranth::Video.find_by_video_url(video_url).update(attributes)
    end

    def initialize attributes={}
      attributes.each do |key, value|
        self[key] = value
      end
    end

    def update attributes={}
      attributes.each do |key, value|
        self[key] = value
      end
      save
    end

    def save
      if persisted?
        save_existing
      else
        raise NotImplementedError
      end
    end

    def persisted?
      id.to_s.length > 0
    end

    private

    READONLY_ATTRIBUTES = %i(all_urls languages)

    def save_existing
      attributes = to_h.delete_if { |key, _| READONLY_ATTRIBUTES.include?(key) }
      Request.put("/api/videos/#{id}/", attributes)
    end
  end
end