defmodule Ammoprices.Scraping.Retailers.LuckyGunnerTest do
  use ExUnit.Case, async: true

  alias Ammoprices.Scraping.Retailers.LuckyGunner

  @fixture_path "test/fixtures/lucky_gunner/9mm.html"

  describe "retailer_slug/0" do
    test "returns lucky-gunner" do
      assert LuckyGunner.retailer_slug() == "lucky-gunner"
    end
  end

  describe "category_url/1" do
    test "maps 9mm-luger caliber to correct URL" do
      caliber = %{slug: "9mm-luger", category: "handgun"}
      assert LuckyGunner.category_url(caliber) == "/handgun/9mm-ammo"
    end

    test "returns nil for unmapped caliber" do
      caliber = %{slug: "unknown-caliber", category: "handgun"}
      assert LuckyGunner.category_url(caliber) == nil
    end
  end

  describe "parse_products/1" do
    setup do
      html = File.read!(@fixture_path)
      %{html: html}
    end

    test "extracts all products from HTML", %{html: html} do
      products = LuckyGunner.parse_products(html)
      assert length(products) == 3
    end

    test "extracts product title", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.title == "9mm - 115 Grain FMJ - Wolf - 1350 Rounds **STEEL CASES**"
    end

    test "extracts product URL", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.url == "https://www.luckygunner.com/9mm-115-grain-fmj-wolf-1350-rounds"
    end

    test "extracts price in cents", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.price_cents == 27_000
    end

    test "extracts price per round in cents", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.price_per_round_cents == 20
    end

    test "extracts fractional price per round", %{html: html} do
      products = LuckyGunner.parse_products(html)
      second = Enum.at(products, 1)
      # 21.2¢ → 21 cents (truncated to integer)
      assert second.price_per_round_cents == 21
    end

    test "extracts brand from description", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.brand == "Wolf"
    end

    test "extracts grain weight from description", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.grain_weight == 115
    end

    test "extracts round count from title", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.round_count == 1350
    end

    test "detects casing material from description", %{html: html} do
      products = LuckyGunner.parse_products(html)
      # First product: steel casings
      assert hd(products).casing == "steel"
      # Third product: brass casings
      assert Enum.at(products, 2).casing == "brass"
    end

    test "marks products as in stock", %{html: html} do
      [first | _] = LuckyGunner.parse_products(html)
      assert first.in_stock == true
    end
  end
end