defmodule Ammoprices.Catalog.Product do
  @moduledoc false
  use Ecto.Schema

  import Ecto.Changeset

  @primary_key {:id, :binary_id, autogenerate: true}
  @foreign_key_type :binary_id
  schema "products" do
    belongs_to :retailer, Ammoprices.Catalog.Retailer
    belongs_to :caliber, Ammoprices.Catalog.Caliber

    field :title, :string
    field :url, :string
    field :brand, :string
    field :grain_weight, :integer
    field :round_count, :integer
    field :casing, :string
    field :condition, :string, default: "new"
    field :upc, :string
    field :external_id, :string
    field :in_stock, :boolean, default: true
    field :last_seen_at, :utc_datetime

    has_many :price_snapshots, Ammoprices.Prices.PriceSnapshot

    timestamps(type: :utc_datetime)
  end

  def changeset(product, attrs) do
    product
    |> cast(attrs, [
      :title,
      :url,
      :brand,
      :grain_weight,
      :round_count,
      :casing,
      :condition,
      :upc,
      :external_id,
      :in_stock,
      :last_seen_at
    ])
    |> validate_required([:title, :url])
    |> validate_inclusion(:casing, ~w(brass steel aluminum alloy composite))
    |> validate_inclusion(:condition, ~w(new remanufactured surplus))
    |> validate_number(:grain_weight, greater_than: 0)
    |> validate_number(:round_count, greater_than: 0)
    |> unique_constraint([:retailer_id, :url])
  end
end