module Pay
  module Receipts
    def receipt_filename
      "receipt-#{created_at.strftime("%Y-%m-%d")}.pdf"
    end
    alias_method :filename, :receipt_filename

    def receipt
      receipt_pdf.render
    end

    def receipt_details
      [
        [I18n.t("pay.receipt.number"), receipt_number],
        [I18n.t("pay.receipt.date"), I18n.l(created_at, format: :long)],
        [I18n.t("pay.receipt.payment_method"), charged_to]
      ]
    end

    def pdf_product_name
      Pay.application_name
    end

    def pdf_line_items
      items = [
        [
          "<b>#{I18n.t("pay.line_items.description")}</b>",
          "<b>#{I18n.t("pay.line_items.quantity")}</b>",
          "<b>#{I18n.t("pay.line_items.unit_price")}</b>",
          "<b>#{I18n.t("pay.line_items.amount")}</b>"
        ]
      ]

      if try(:stripe_invoice)
        stripe_invoice.lines.auto_paging_each do |line|
          items << [line.description, line.quantity, Pay::Currency.format(line.pricing.unit_amount_decimal, currency: line.currency), Pay::Currency.format(line.amount, currency: line.currency)]

          line.discounts.each do |discount_id|
            discount = stripe_invoice.total_discount_amounts.find { |d| d.discount.id == discount_id }
            items << [discount_description(discount), nil, nil, Pay::Currency.format(-discount.amount, currency: currency)]
          end
        end
      else
        items << [pdf_product_name, 1, Pay::Currency.format(amount, currency: currency), Pay::Currency.format(amount, currency: currency)]
      end

      # If no subtotal, we will display the total
      items << [nil, nil, I18n.t("pay.line_items.subtotal"), Pay::Currency.format(try(:stripe_invoice)&.subtotal || amount, currency: currency)]

      # Discounts on the invoice
      try(:stripe_invoice)&.discounts&.each do |discount_id|
        discount = stripe_invoice.total_discount_amounts.find { |d| d.discount.id == discount_id }
        items << [nil, nil, discount_description(discount), Pay::Currency.format(-discount.amount, currency: currency)]
      end

      # Total excluding tax
      if try(:stripe_invoice)
        items << [nil, nil, I18n.t("pay.line_items.total"), Pay::Currency.format(stripe_invoice.total_excluding_tax, currency: currency)]
      end

      # Tax rates
      try(:stripe_invoice)&.total_taxes&.each do |tax|
        next if tax.amount.zero?
        # tax_rate = ::Stripe::TaxRate.retrieve(tax.tax_rate_details.tax_rate)
        items << [nil, nil, I18n.t("pay.line_items.tax"), Pay::Currency.format(tax.amount, currency: currency)]
      end

      # Total
      items << [nil, nil, I18n.t("pay.line_items.total"), Pay::Currency.format(amount, currency: currency)]
      items
    end

    def discount_description(discount)
      coupon = discount.discount.coupon
      name = coupon.name

      if (percent = coupon.percent_off)
        I18n.t("pay.line_items.percent_discount", name: name, percent: ActiveSupport::NumberHelper.number_to_rounded(percent, strip_insignificant_zeros: true))
      else
        I18n.t("pay.line_items.amount_discount", name: name, amount: Pay::Currency.format(coupon.amount_off, currency: coupon.currency))
      end
    end

    # def tax_description(tax_rate)
    #   percent = "#{ActiveSupport::NumberHelper.number_to_rounded(tax_rate.percentage, strip_insignificant_zeros: true)}%"
    #   percent += " inclusive" if tax_rate.inclusive
    #   "#{tax_rate.display_name} - #{tax_rate.jurisdiction} (#{percent})"
    # end

    def receipt_line_items
      line_items = pdf_line_items

      # Include total paid
      line_items << [nil, nil, I18n.t("pay.receipt.amount_paid"), Pay::Currency.format(amount, currency: currency)]

      if refunded?
        # If we have a list of individual refunds, add each entry
        # if refunds&.any?
        #   refunds.each do |refund|
        #     next unless refund["status"] == "succeeded"
        #     refunded_at = Time.at(refund["created"]).to_date
        #     line_items << [nil, nil, I18n.t("pay.receipt.refunded_on", date: I18n.l(refunded_at, format: :long)), Pay::Currency.format(refund["amount"], currency: refund["currency"])]
        #   end
        # else
        line_items << [nil, nil, I18n.t("pay.receipt.refunded"), Pay::Currency.format(amount_refunded, currency: currency)]
        # end
      end

      line_items
    end

    def receipt_pdf(**options)
      defaults = {
        details: receipt_details,
        recipient: [
          customer.customer_name,
          customer.email,
          customer.owner.try(:extra_billing_info)
        ],
        company: {
          name: Pay.business_name,
          address: Pay.business_address,
          email: Pay.support_email&.address,
          logo: Pay.business_logo
        },
        line_items: receipt_line_items
      }

      ::Receipts::Receipt.new(defaults.deep_merge(options))
    end

    def invoice_filename
      "invoice-#{created_at.strftime("%Y-%m-%d")}.pdf"
    end

    def invoice
      invoice_pdf.render
    end

    def invoice_details
      [
        [I18n.t("pay.invoice.number"), invoice_number],
        [I18n.t("pay.invoice.date"), I18n.l(created_at, format: :long)],
        [I18n.t("pay.invoice.payment_method"), charged_to]
      ]
    end

    def invoice_pdf(**options)
      defaults = {
        details: invoice_details,
        recipient: [
          customer.customer_name,
          customer.email,
          customer.owner.try(:extra_billing_info)
        ],
        company: {
          name: Pay.business_name,
          address: Pay.business_address,
          email: Pay.support_email&.address,
          logo: Pay.business_logo
        },
        line_items: pdf_line_items
      }

      ::Receipts::Invoice.new(defaults.deep_merge(options))
    end

    def invoice_number
      id
    end

    def receipt_number
      invoice_number
    end
  end
end
