# GENERATED BY THE SHOPIFY SCRIPT CREATOR APP
class Campaign
  def initialize(condition, *qualifiers)
    @condition = (condition.to_s + '?').to_sym
    @qualifiers = PostCartAmountQualifier ? [] : [] rescue qualifiers.compact
    @line_item_selector = qualifiers.last unless @line_item_selector
    qualifiers.compact.each do |qualifier|
      is_multi_select = qualifier.instance_variable_get(:@conditions).is_a?(Array)
      if is_multi_select
        qualifier.instance_variable_get(:@conditions).each do |nested_q|
          @post_amount_qualifier = nested_q if nested_q.is_a?(PostCartAmountQualifier)
          @qualifiers << qualifier
        end
      else
        @post_amount_qualifier = qualifier if qualifier.is_a?(PostCartAmountQualifier)
        @qualifiers << qualifier
      end
    end if @qualifiers.empty?
  end

  def qualifies?(cart)
    return true if @qualifiers.empty?
    @unmodified_line_items = cart.line_items.map do |item|
      new_item = item.dup
      new_item.instance_variables.each do |var|
        val = item.instance_variable_get(var)
        new_item.instance_variable_set(var, val.dup) if val.respond_to?(:dup)
      end
      new_item
    end if @post_amount_qualifier
    @qualifiers.send(@condition) do |qualifier|
      is_selector = false
      if qualifier.is_a?(Selector) || qualifier.instance_variable_get(:@conditions).any? { |q| q.is_a?(Selector) }
        is_selector = true
      end rescue nil
      if is_selector
        raise "Missing line item match type" if @li_match_type.nil?
        cart.line_items.send(@li_match_type) { |item| qualifier.match?(item) }
      else
        qualifier.match?(cart, @line_item_selector)
      end
    end
  end

  def run_with_hooks(cart)
    before_run(cart) if respond_to?(:before_run)
    run(cart)
    after_run(cart)
  end

  def after_run(cart)
    @discount.apply_final_discount if @discount && @discount.respond_to?(:apply_final_discount)
    revert_changes(cart) unless @post_amount_qualifier.nil? || @post_amount_qualifier.match?(cart)
  end

  def revert_changes(cart)
    cart.instance_variable_set(:@line_items, @unmodified_line_items)
  end
end

class TieredDiscount < Campaign
  def initialize(condition, customer_qualifier, cart_qualifier, line_item_selector, discount_type, tier_type, discount_tiers)
    super(condition, customer_qualifier, cart_qualifier)
    @line_item_selector = line_item_selector
    @discount_type = discount_type
    @tier_type = tier_type
    @discount_tiers = discount_tiers.sort_by {|tier| tier[:discount].to_f }
  end

  def init_discount(amount, message)
    case @discount_type
      when :fixed
        return FixedTotalDiscount.new(amount, message, :split)
      when :percent
        return PercentageDiscount.new(amount, message)
      when :per_item
        return FixedItemDiscount.new(amount, message)
    end
  end

  def run(cart)
    return unless qualifies?(cart)

    applicable_items = cart.line_items.select { |item| @line_item_selector.nil? || @line_item_selector.match?(item) }
    case @tier_type
      when :customer_tag
        return if cart.customer.nil?
        customer_tags = cart.customer.tags.map(&:downcase)
        qualified_tiers = @discount_tiers.select { |tier| customer_tags.include?(tier[:tier].downcase) }
      when :cart_subtotal
        cart_total = cart.subtotal_price
        qualified_tiers = @discount_tiers.select { |tier| cart_total >= Money.new(cents: tier[:tier].to_i * 100) }
      when :discountable_total
        discountable_total = applicable_items.reduce(Money.zero) { |total, item| total + item.line_price }
        qualified_tiers = @discount_tiers.select { |tier| discountable_total >= Money.new(cents: tier[:tier].to_i * 100) }
      when :discountable_total_items
        discountable_quantity = applicable_items.reduce(0) { |total, item| total + item.quantity }
        qualified_tiers = @discount_tiers.select { |tier| discountable_quantity >= tier[:tier].to_i }
      when :cart_items
        cart_quantity = cart.line_items.reduce(0) { |total, item| total + item.quantity }
        qualified_tiers = @discount_tiers.select { |tier| cart_quantity >= tier[:tier].to_i }
    end

    if @tier_type == :line_quantity
      applicable_items.each do |item|
        qualified_tiers = @discount_tiers.select { |tier| item.quantity >= tier[:tier].to_i }
        next if qualified_tiers.empty?

        discount_amount = qualified_tiers.last[:discount].to_f
        discount_message = qualified_tiers.last[:message]
        discount = init_discount(discount_amount, discount_message)
        discount.apply(item)
        discount.apply_final_discount if discount.respond_to?(:apply_final_discount)
      end
    else
      return if qualified_tiers.empty?
      discount_amount = qualified_tiers.last[:discount].to_f
      discount_message = qualified_tiers.last[:message]

      @discount = init_discount(discount_amount, discount_message)
      applicable_items.each { |item| @discount.apply(item) }
    end
  end
end

class PercentageDiscount
  def initialize(percent, message)
    @discount = (100 - percent) / 100.0
    @message = message
  end

  def apply(line_item)
    line_item.change_line_price(line_item.line_price * @discount, message: @message)
  end
end

class FixedTotalDiscount
  def initialize(amount, message, behaviour = :to_zero)
    @amount = Money.new(cents: amount * 100)
    @message = message
    @discount_applied = Money.zero
    @all_items = []
    @is_split = behaviour == :split
  end

  def apply(line_item)
    if @is_split
      @all_items << line_item
    else
      return unless @discount_applied < @amount
      discount_to_apply = [(@amount - @discount_applied), line_item.line_price].min
      line_item.change_line_price(line_item.line_price - discount_to_apply, {message: @message})
      @discount_applied += discount_to_apply
    end
  end

  def apply_final_discount
    return if @all_items.length == 0
    total_items = @all_items.length
    total_quantity = 0
    total_cost = Money.zero
    @all_items.each do |item|
      total_quantity += item.quantity
      total_cost += item.line_price
    end
    @all_items.each_with_index do |item, index|
      discount_percent = item.line_price.cents / total_cost.cents
      if total_items == index + 1
        discount_to_apply = Money.new(cents: @amount.cents - @discount_applied.cents.floor)
      else
        discount_to_apply = Money.new(cents: @amount.cents * discount_percent)
      end
      item.change_line_price(item.line_price - discount_to_apply, {message: @message})
      @discount_applied += discount_to_apply
    end
  end
end

class FixedItemDiscount
  def initialize(amount, message)
    @amount = Money.new(cents: amount * 100)
    @message = message
  end

  def apply(line_item)
    per_item_price = line_item.variant.price
    per_item_discount = [(@amount - per_item_price), @amount].max
    discount_to_apply = [(per_item_discount * line_item.quantity), line_item.line_price].min
    line_item.change_line_price(line_item.line_price - discount_to_apply, {message: @message})
  end
end

class Qualifier
  def partial_match(match_type, item_info, possible_matches)
    match_type = (match_type.to_s + '?').to_sym
    if item_info.kind_of?(Array)
      possible_matches.any? do |possibility|
        item_info.any? do |search|
          search.send(match_type, possibility)
        end
      end
    else
      possible_matches.any? do |possibility|
        item_info.send(match_type, possibility)
      end
    end
  end

  def compare_amounts(compare, comparison_type, compare_to)
    case comparison_type
      when :greater_than
        return compare > compare_to
      when :greater_than_or_equal
        return compare >= compare_to
      when :less_than
        return compare < compare_to
      when :less_than_or_equal
        return compare <= compare_to
      when :equal_to
        return compare == compare_to
      else
        raise "Invalid comparison type"
    end
  end
end

class CustomerTagQualifier < Qualifier
  def initialize(match_type, match_condition, tags)
    @match_condition = match_condition
    @invert = match_type == :does_not
    @tags = tags.map(&:downcase)
  end

  def match?(cart, selector = nil)
    return true if cart.customer.nil? && @invert
    return false if cart.customer.nil?
    customer_tags = cart.customer.tags.to_a.map(&:downcase)
    case @match_condition
      when :match
        return @invert ^ ((@tags & customer_tags).length > 0)
      else
        return @invert ^ partial_match(@match_condition, customer_tags, @tags)
    end
  end
end

class CartAmountQualifier < Qualifier
  def initialize(behaviour, comparison_type, amount)
    @behaviour = behaviour
    @comparison_type = comparison_type
    @amount = Money.new(cents: amount * 100)
  end

  def match?(cart, selector = nil)
    total = cart.subtotal_price
    if @behaviour == :item || @behaviour == :diff_item
      total = cart.line_items.reduce(Money.zero) do |total, item|
        total + (selector&.match?(item) ? item.line_price : Money.zero)
      end
    end
    case @behaviour
      when :cart, :item
        compare_amounts(total, @comparison_type, @amount)
      when :diff_cart
        compare_amounts(cart.subtotal_price_was - @amount, @comparison_type, total)
      when :diff_item
        original_line_total = cart.line_items.reduce(Money.zero) do |total, item|
          total + (selector&.match?(item) ? item.original_line_price : Money.zero)
        end
        compare_amounts(original_line_total - @amount, @comparison_type, total)
    end
  end
end

class Selector
  def partial_match(match_type, item_info, possible_matches)
    match_type = (match_type.to_s + '?').to_sym
    if item_info.kind_of?(Array)
      possible_matches.any? do |possibility|
        item_info.any? do |search|
          search.send(match_type, possibility)
        end
      end
    else
      possible_matches.any? do |possibility|
        item_info.send(match_type, possibility)
      end
    end
  end
end

class ProductTypeSelector < Selector
  def initialize(match_type, product_types)
    @invert = match_type == :not_one
    @product_types = product_types.map(&:downcase)
  end

  def match?(line_item)
    @invert ^ @product_types.include?(line_item.variant.product.product_type.downcase)
  end
end

CAMPAIGNS = [
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      400
    ),
    ProductTypeSelector.new(
      :is_one,
      ["ratcat"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "ratcat", :discount => "29", :message => "$400 column pricing -RatCAT"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      400
    ),
    ProductTypeSelector.new(
      :is_one,
      ["cabletester"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "cabletesters", :discount => "29", :message => "$400 column pricing - Testers"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      400
    ),
    ProductTypeSelector.new(
      :is_one,
      ["cable"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "cable", :discount => "15", :message => "$400 column pricing - cable"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      400
    ),
    ProductTypeSelector.new(
      :is_one,
      ["essentials"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "essentials", :discount => "25", :message => "$400 column pricing - essentials"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      2500
    ),
    ProductTypeSelector.new(
      :is_one,
      ["ratcat"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "ratcat", :discount => "39", :message => "$2500 column pricing -RatCAT"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      2500
    ),
    ProductTypeSelector.new(
      :is_one,
      ["cabletester"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "cabletesters", :discount => "39", :message => "$2500 column pricing - Testers"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      2500
    ),
    ProductTypeSelector.new(
      :is_one,
      ["cable"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "cable", :discount => "25", :message => "$2500 column pricing - cable"}]
  ),
  TieredDiscount.new(
    :all,
    CustomerTagQualifier.new(
      :does,
      :match,
      ["flexdealer"]
    ),
    CartAmountQualifier.new(
      :cart,
      :greater_than_or_equal,
      2500
    ),
    ProductTypeSelector.new(
      :is_one,
      ["essentials"]
    ),
    :percent,
    :cart_subtotal,
    [{:tier => "essentials", :discount => "25", :message => "$2500 column pricing - essentials"}]
  )
].freeze

CAMPAIGNS.each do |campaign|
  campaign.run_with_hooks(Input.cart)
end

Output.cart = Input.cart