# frozen_string_literal: true

require "csv"
require File.expand_path(File.dirname(__FILE__) + "/base.rb")

# Import script for forums created via mybb.ru service (or anything else that uses this simple JSON format),
# using export format produced by https://github.com/AlexP11223/MybbRuUserscripts
# Set ENV variables, e.g. "export JSON_TOPICS_FILE=my_path/threads.json", or set/use the paths in the constants below
# If your forum has non-English usernames, don't forget to enable Unicode usernames in /admin/site_settings

class ImportScripts::MybbRu < ImportScripts::Base
  JSON_TOPICS_FILE_PATH = ENV["JSON_TOPICS_FILE"] || "mybbru_export/threads.json"
  JSON_USERS_FILE_PATH = ENV["JSON_USERS_FILE"] || "mybbru_export/users.json"

  def initialize
    super

    @imported_topics = load_json(JSON_TOPICS_FILE_PATH)
    @imported_users = load_json(JSON_USERS_FILE_PATH)
  end

  def execute
    puts "", "Importing from JSON file..."

    import_users
    import_categories
    import_discussions

    puts "", "Done"
  end

  def load_json(path)
    JSON.parse(File.read(path))
  end

  def clean_username(name)
    name.gsub(/ /, "")
  end

  def import_users
    puts "", "Importing users"

    create_users(@imported_users) do |u|
      { id: u["id"], username: clean_username(u["name"]), email: u["email"], created_at: Time.now }
    end
  end

  def import_categories
    puts "", "importing categories..."

    categories = @imported_topics.map { |t| t["category"] }.uniq

    create_categories(categories) { |c| { id: c["id"], name: c["name"] } }
  end

  def import_discussions
    puts "", "Importing discussions"

    @imported_topics.each do |t|
      first_post = t["posts"][0]

      create_posts(t["posts"]) do |p|
        result = {
          id: p["id"],
          user_id: user_id_from_imported_user_id(p["author"]["id"]),
          raw: fix_post_content(p["source"]),
          created_at: Time.at(p["createdAt"]),
          cook_method: Post.cook_methods[:regular],
        }

        if p["id"] == first_post["id"]
          result[:category] = category_id_from_imported_category_id(t["category"]["id"])
          result[:title] = t["title"]
        else
          parent = topic_lookup_from_imported_post_id(first_post["id"])
          if parent
            result[:topic_id] = parent[:topic_id]
          else
            puts "Parent post #{first_post["id"]} doesn't exist. Skipping #{p["id"]}: #{t["title"][0..40]}"
            break
          end
        end

        result
      end
    end
  end

  def fix_post_content(text)
    text
      .gsub(/\[code\]/, "\n[code]\n")
      .gsub(%r{\[/code\]}, "\n[/code]\n")
      .gsub(/\[video\]/, "")
      .gsub(%r{\[/video\]}, "")
      .gsub(/\[quote.*?\]/, "\n" + '\0' + "\n")
      .gsub(%r{\[/quote\]}, "\n[/quote]\n")
      .gsub(/\[spoiler.*?\]/, "\n" + '\0' + "\n")
      .gsub(/\[spoiler/, "[details")
      .gsub(%r{\[/spoiler\]}, "\n[/details]\n")
  end
end

ImportScripts::MybbRu.new.perform if __FILE__ == $0