module EffectiveOrdersHelper
  def price_to_currency(price)
    raise 'price_to_currency expects an Integer representing the number of cents in a price' unless price.kind_of?(Integer)
    number_to_currency(price / 100.0)
  end

  def tax_rate_to_percentage(tax_rate)
    number_to_percentage(tax_rate, strip_insignificant_zeros: true)
  end

  def order_summary(order)
    order_item_list = content_tag(:ul) do
      order.order_items.map do |item|
        content_tag(:li) do
          title = item.title.split('<br>')
          "#{item.quantity}x #{title.first} for #{price_to_currency(item.price)}".tap do |output|
            title[1..-1].each { |line| output << "<br>#{line}" }
          end.html_safe
        end
      end.join.html_safe
    end
    content_tag(:p, "#{price_to_currency(order.total)} total for #{pluralize(order.num_items, 'item')}:") + order_item_list
  end

  def order_item_summary(order_item)
    if order_item.quantity > 1
      content_tag(:p, "#{price_to_currency(order_item.total)} total for #{pluralize(order_item.quantity, 'item')}")
    else
      content_tag(:p, "#{price_to_currency(order_item.total)} total")
    end
  end

  def order_checkout_label(processor = nil)
    return 'Checkout' if (EffectiveOrders.single_payment_processor? && processor != :pretend)

    case processor
    when :free
      'Checkout'
    when :moneris, :stripe, :ccbill
      'Checkout with credit card'
    when :paypal
      'Checkout with PayPal'
    when :pretend
      EffectiveOrders.allow_pretend_purchase_in_production ? 'Purchase Order' : 'Purchase Order (development only)'
    when :cheque
      'Pay by Cheque'
    when :app_checkout
      EffectiveOrders.app_checkout[:checkout_label].presence || 'Checkout'
    else
      'Checkout'
    end
  end

  # This is called on the My Sales Page and is intended to be overridden in the app if needed
  def acts_as_purchasable_path(purchasable, action = :show)
    polymorphic_path(purchasable)
  end

  def order_payment_to_html(order)
    payment = order.payment

    if order.purchased?(:stripe_connect) && order.payment.kind_of?(Hash)
      payment = Hash[
        order.payment.map do |seller_id, v|
          if (user = Effective::Customer.find(seller_id).try(:user))
            [link_to(user, admin_user_path(user)), order.payment[seller_id]]
          else
            [seller_id, order.payment[seller_id]]
          end
        end
      ]
    end

    content_tag(:pre) do
      raw JSON.pretty_generate(payment).html_safe
        .gsub('\"', '')
        .gsub("[\n\n    ]", '[]')
        .gsub("{\n    }", '{}')
    end
  end

  def render_order(order)
    render(partial: 'effective/orders/order', locals: {order: order})
  end

  def render_checkout_step1(order, opts = {})
    raise ArgumentError.new('unable to checkout an order without a user') unless order.user.present?

    locals = { purchased_redirect_url: nil, declined_redirect_url: nil }.merge(opts)

    render(partial: 'effective/orders/checkout_step1', locals: locals.merge({order: order}))
  end
  alias_method :render_checkout, :render_checkout_step1

  def render_checkout_step2(order, opts = {})
    raise ArgumentError.new('unable to checkout an order without a user') unless order.user.present?

    locals = { purchased_redirect_url: nil, declined_redirect_url: nil }.merge(opts)

    if order.new_record? || !order.valid?
      render(partial: 'effective/orders/checkout_step1', locals: locals.merge({order: order}))
    else
      render(partial: 'effective/orders/checkout_step2', locals: locals.merge({order: order}))
    end
  end

  def link_to_my_purchases(opts = {})
    options = {
      label: 'My Purchases',
      class: 'btn btn-default',
      rel: :nofollow
    }.merge(opts)

    label = options.delete(:label)
    options[:class] = ((options[:class] || '') + ' btn-my-purchases')

    link_to(label, effective_orders.my_purchases_path, options)
  end
  alias_method :link_to_order_history, :link_to_my_purchases

  def render_orders_table(user_or_orders, opts = {})
    if user_or_orders.kind_of?(User)
      orders = Effective::Order.purchased_by(user_or_orders)
    elsif user_or_orders.respond_to?(:to_a)
      orders = user_or_orders.to_a
    else
      raise ArgumentError.new('expecting an instance of User or an array/collection of Effective::Order objects')
    end

    render(partial: 'effective/orders/orders_table', locals: {orders: orders}.merge(opts))
  end

  alias_method :render_purchases, :render_orders_table
  alias_method :render_my_purchases, :render_orders_table
  alias_method :render_order_history, :render_orders_table

  # Used by the _payment_details partial
  def tableize_order_payment(hash, options = {class: 'table table-bordered'})
    if hash.present? && hash.kind_of?(Hash)
      content_tag(:table, class: options[:class]) do
        title = options.delete(:title)

        content = content_tag(:tbody) do
          hash.map do |k, v|
            content_tag(:tr) do
              content_tag((options[:th] ? :th : :td), k) +
                content_tag(:td) do
                  if v.kind_of?(Hash)
                    tableize_order_payment(v, options.merge(th: (options.key?(:sub_th) ? options[:sub_th] : options[:th])))
                  elsif v.kind_of?(Array)
                    '[' + v.join(', ') + ']'
                  else
                    v
                  end
                end
            end
          end.join.html_safe
        end

        title.blank? ? content : (content_tag(:thead) { content_tag(:tr) { content_tag(:th, title, colspan: 2) } } + content)
      end
    else
      hash.to_s.html_safe
    end
  end

end