defmodule DaProductApp.Merchants.Merchant do
  use Ecto.Schema
  import Ecto.Changeset

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

  schema "merchants" do
    field :name, :string
    field :email, :string
    field :phone, :string
    field :status, :string
    field :merchant_id, :string
    field :category, :string  # Cat A, Cat B, Cat C, Cat D
    field :mcc_code, :string  # Merchant Category Code
    field :risk_tier, :string  # Enterprise, Mid-Market, Known Entity, SME/SMB
    # ... add additional fields if needed ...
    timestamps(type: :utc_datetime)
  end

  @valid_categories ["Cat A", "Cat B", "Cat C", "Cat D"]
  @valid_risk_tiers ["Enterprise Merchant", "Mid-Market Merchant", "Known Entity", "SME/SMB"]

  def changeset(merchant, attrs) do
    merchant
    |> cast(attrs, [:name, :email, :phone, :status, :merchant_id, :category, :mcc_code, :risk_tier])
    |> validate_required([:name])
    |> validate_inclusion(:category, @valid_categories)
    |> validate_inclusion(:risk_tier, @valid_risk_tiers)
    |> validate_length(:mcc_code, is: 4)
  end

  def valid_categories, do: @valid_categories
  def valid_risk_tiers, do: @valid_risk_tiers
end