require 'active_record'
require 'json'

require_relative 'feed_post'

class Post < ActiveRecord::Base
  validates_presence_of :repo, :time, :data, :rkey
  validates :text, length: { minimum: 0, allow_nil: false }
  validates_length_of :repo, maximum: 60
  validates_length_of :rkey, maximum: 16
  validates_length_of :text, maximum: 1000
  validates_length_of :data, maximum: 10000

  has_many :feed_posts, dependent: :destroy

  attr_writer :record

  def self.find_by_repo_rkey(repo, rkey)
    # the '+' is to make sure that SQLite uses the rkey index and not a different one
    Post.where("+repo = ?", repo).where(rkey: rkey).first
  end

  def self.find_by_at_uri(uri)
    parts = uri.gsub(%r(^at://), '').split('/')
    return nil unless parts.length == 3 && parts[1] == 'app.bsky.feed.post'

    find_by_repo_rkey(parts[0], parts[2])
  end

  def record
    @record ||= JSON.parse(data)
  end

  def at_uri
    "at://#{repo}/app.bsky.feed.post/#{rkey}"
  end

  def quoted_post_uri
    if embed = record['embed']
      if embed['$type'] == "app.bsky.embed.record"
        return embed['record']['uri']
      elsif embed['$type'] == "app.bsky.embed.recordWithMedia"
        if embed['record']['$type'] == "app.bsky.embed.record"
          return embed['record']['record']['uri']
        end
      end
    end

    return nil
  end

  def thread_root_uri
    if root = (record['reply'] && record['reply']['root'])
      root['uri']
    else
      nil
    end
  end

  def parent_uri
    if parent = (record['reply'] && record['reply']['parent'])
      parent['uri']
    else
      nil
    end
  end

  def trim_too_long_data
    if embed = record['embed']
      if external = embed['external']
        external['description'] = ''
      end
    end

    if record['bridgyOriginalText']
      record['bridgyOriginalText'] = ''
    end

    self.data = JSON.generate(record)
  end
end