class CreateOrders < ActiveRecord::Migration[4.2]
  ORDER_TEST = 'Test Order'
  GROUP_ORDER = 'Orders'

  def self.up
    # Order role
    add_column :groups, :role_orders, :boolean, default: false, null: false
    Group.reset_column_information
    puts "Give #{CreateGroups::GROUP_ADMIN} the role finance .."
    raise 'Failed' unless Group.find_by_name(CreateGroups::GROUP_ADMIN).update_attribute(:role_orders, true)
    raise 'Cannot find admin user!' unless admin = User.find_by_nick(CreateUsers::USER_ADMIN)
    raise 'Failed to enable role_orders with admin user!' unless admin.role_orders?

    # Create the default "Order" group...
    puts 'Creating group "Orders"...'
    Group.create(name: GROUP_ORDER, description: 'working group for managing orders', role_orders: true)
    raise 'Failed!' unless Group.find_by_name(GROUP_ORDER)

    # Order
    create_table :orders do |t|
      t.column :name, :string, null: false
      t.column :supplier_id, :integer, null: false
      t.column :starts, :datetime, null: false
      t.column :ends, :datetime
      t.column :note, :string
      t.column :finished, :boolean, default: false, null: false
      t.column :booked, :boolean, null: false, default: false
      t.column :lock_version, :integer, null: false, default: 0
      t.column :updated_by_user_id, :integer
    end
    add_index(:orders, :starts)
    add_index(:orders, :ends)
    add_index(:orders, :finished)

    puts "Creating order '#{ORDER_TEST}'..."
    raise "Supplier '#{CreateSuppliers::SUPPLIER_SAMPLE}' not found!" unless supplier = Supplier.find_by_name(CreateSuppliers::SUPPLIER_SAMPLE)

    Order.create(name: ORDER_TEST, supplier: supplier, starts: Time.now)
    raise 'Creating test order failed!' unless order = Order.find_by_name(ORDER_TEST)

    # OrderArticle
    create_table :order_articles do |t|
      t.column :order_id, :integer, null: false
      t.column :article_id, :integer, null: false
      t.column :quantity, :integer, null: false, default: 0
      t.column :tolerance, :integer, null: false, default: 0
      t.column :units_to_order, :integer, null: false, default: 0
      t.column :lock_version, :integer, null: false, default: 0
    end
    add_index(:order_articles, %i[order_id article_id], unique: true)

    puts 'Adding articles to the order...'
    CreateArticles::SAMPLE_ARTICLE_NAMES.each do |a|
      puts "Article #{a}..."
      raise 'Article not found!' unless article = Article.find_by_name(a)
      raise 'No price found for article!' unless price = article.current_price

      OrderArticle.create(order: order, article: article)
      raise 'Creating OrderArticle failed!' unless OrderArticle.find_by_order_id_and_article_id(order.id, article.id)
    end
    raise 'Creating OrderArticles failed!' unless order.articles.size == CreateArticles::SAMPLE_ARTICLE_NAMES.length

    # GroupOrder
    create_table :group_orders do |t|
      t.column :order_group_id, :integer, null: false
      t.column :order_id, :integer, null: false
      t.column :price, :decimal, precision: 8, scale: 2, null: false, default: 0
      t.column :lock_version, :integer, null: false, default: 0
      t.column :updated_on, :timestamp, null: false
      t.column :updated_by_user_id, :integer, null: false
    end
    add_index(:group_orders, %i[order_group_id order_id], unique: true)

    puts 'Adding group order...'
    raise "Cannot find user #{CreateUsers::USER_TEST}" unless user = User.find_by_nick(CreateUsers::USER_TEST)
    raise "Cannot find OrderGroup '#{CreateGroups::GROUP_ORDER}'!" unless orderGroup = OrderGroup.find_by_name(CreateGroups::GROUP_ORDER)

    GroupOrder.create(order_group: orderGroup, order: order, price: 0, updated_by: user)
    raise 'Retrieving group order failed!' unless groupOrder = orderGroup.group_orders.find(:first,
                                                                                            conditions: "order_id = #{order.id}")

    # GroupOrderArticles
    create_table :group_order_articles do |t|
      t.column :group_order_id, :integer, null: false
      t.column :order_article_id, :integer, null: false
      t.column :quantity, :integer, null: false
      t.column :tolerance, :integer, null: false
      t.column :updated_on, :timestamp, null: false
    end
    add_index(:group_order_articles, %i[group_order_id order_article_id], unique: true, name: 'goa_index')
    # GroupOrderArticleQuantity
    create_table :group_order_article_quantities do |t|
      t.column :group_order_article_id, :int, null: false
      t.column :quantity, :int, default: 0
      t.column :tolerance, :int, default: 0
      t.column :created_on, :timestamp, null: false
    end

    puts 'Adding articles to group order...'
    order.order_articles.each do |orderArticle|
      puts "Article #{orderArticle.article.name}..."
      GroupOrderArticle.create(group_order: groupOrder, order_article: orderArticle, quantity: 0,
                               tolerance: 0)
      raise 'Failed to create order!' unless article = GroupOrderArticle.find(:first,
                                                                              conditions: "group_order_id = #{groupOrder.id} AND order_article_id = #{orderArticle.id}")

      article.updateQuantities(rand(1..6), rand(1..4))
    end
    raise 'Failed to create orders!' unless groupOrder.order_articles.size == order.order_articles.size

    groupOrder.updatePrice
    raise 'Failed to update GroupOrder.price' unless groupOrder.save!

    # Update order
    order.updateQuantities
  end

  def self.down
    remove_column :groups, :role_orders
    drop_table :orders
    drop_table :order_articles
    drop_table :group_orders
    drop_table :group_order_articles
    drop_table :group_order_article_quantities
  end
end
