#!/usr/bin/env ruby

require "thor"

class DiscourseCLI < Thor
  class_option :verbose, default: false, aliases: :v

  desc "migrate", "Make sure all the posts are pointing to the new domain"
  option :from, type: :array, required: true, banner: "http://previous.domain.com"
  option :database, default: "default", aliases: :db
  def migrate
    verbose = options[:verbose]
    database = options[:database]
    from = options[:from].map { |f| schemaless f }

    begin
      puts "loading rails..." if verbose
      load_rails

      puts "connecting to #{database}..." if verbose
      RailsMultisite::ConnectionManagement.establish_connection(db: database)

      base_url = schemaless Discourse.base_url_no_prefix

      puts "updating #{Post.count} posts to #{base_url}" if verbose
      Post.find_each do |post|
        raw, cooked = post.raw.dup, post.cooked.dup
        from.each do |f|
          raw.gsub!(f, base_url)
          cooked.gsub!(f, base_url)
        end
        if raw != post.raw || cooked != post.cooked
          Post.where(id: post.id).update_all(raw: raw, cooked: cooked)
          putc "#" if verbose
        else
          putc "."
        end
      end

    rescue => e
      puts "Cannot connect to database: #{database}"
      puts e
      puts e.backtrace.join("\n")
    end

    puts "", "done!" if verbose
  end

  private

  def load_rails
    require File.expand_path(File.dirname(__FILE__) + "/../config/environment")
  end

  def schemaless(url)
    url.gsub(/^https?:/, "")
  end

end

DiscourseCLI.start(ARGV)