defmodule ArcadiaCloud.Billing.TenantInvoice do
  use Ecto.Schema
  import Ecto.Changeset

  @primary_key {:id, :binary_id, autogenerate: true}
  @foreign_key_type :binary_id

  @statuses ~w(draft issued paid void)

  schema "tenant_invoices" do
    field :tenant_id, :string
    field :period_start, :date
    field :period_end, :date
    field :currency, :string, default: "AUD"
    field :subtotal_cents, :integer, default: 0
    field :tax_cents, :integer, default: 0
    field :total_cents, :integer, default: 0
    field :status, :string, default: "issued"
    field :issued_at, :utc_datetime
    field :paid_at, :utc_datetime
    field :finance_invoice_id, :string
    field :pushed_to_finance_at, :utc_datetime

    has_many :lines, ArcadiaCloud.Billing.TenantInvoiceLine, foreign_key: :invoice_id

    timestamps(type: :utc_datetime)
  end

  @required ~w(tenant_id period_start period_end)a
  @optional ~w(currency subtotal_cents tax_cents total_cents status issued_at
               paid_at finance_invoice_id pushed_to_finance_at)a

  def changeset(invoice, attrs) do
    invoice
    |> cast(attrs, @required ++ @optional)
    |> validate_required(@required)
    |> validate_inclusion(:status, @statuses)
    |> unique_constraint([:tenant_id, :period_start])
  end
end