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

  alias Ammoprices.Scraping.Retailers.PalmettoStateArmory

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

  describe "retailer_slug/0" do
    test "returns palmetto-state-armory" do
      assert PalmettoStateArmory.retailer_slug() == "palmetto-state-armory"
    end
  end

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

    test "maps 223-rem caliber to correct URL" do
      caliber = %{slug: "223-rem"}
      assert PalmettoStateArmory.category_url(caliber) == "/223-ammo.html"
    end

    test "maps 556-nato caliber to correct URL" do
      caliber = %{slug: "556-nato"}
      assert PalmettoStateArmory.category_url(caliber) == "/5-56-ammo.html"
    end

    test "returns nil for unmapped caliber" do
      caliber = %{slug: "unknown-caliber"}
      assert PalmettoStateArmory.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 = PalmettoStateArmory.parse_products(html)
      assert length(products) == 4
    end

    test "extracts product title", %{html: html} do
      [first | _] = PalmettoStateArmory.parse_products(html)
      assert first.title == "TROY 9MM 115GR FMJ Ammo, 50rds - YTR9M115FMJ"
    end

    test "extracts product URL", %{html: html} do
      [first | _] = PalmettoStateArmory.parse_products(html)

      assert first.url ==
               "https://palmettostatearmory.com/troy-9mm-115gr-fmj-ammo-50rds-ytr9m115fmj.html"
    end

    test "extracts price in cents from data-price-amount", %{html: html} do
      [first | _] = PalmettoStateArmory.parse_products(html)
      assert first.price_cents == 1199
    end

    test "extracts price per round in cents from unit_price", %{html: html} do
      [first | _] = PalmettoStateArmory.parse_products(html)
      # 0.2398 * 100 = 23.98 → 24 cents
      assert first.price_per_round_cents == 24
    end

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

    test "extracts round count from title", %{html: html} do
      [first | _] = PalmettoStateArmory.parse_products(html)
      assert first.round_count == 50
    end

    test "marks all listed products as in stock", %{html: html} do
      products = PalmettoStateArmory.parse_products(html)
      assert Enum.all?(products, & &1.in_stock)
    end

    test "detects casing from title", %{html: html} do
      products = PalmettoStateArmory.parse_products(html)
      # Third product: "Steel Case" in title
      assert Enum.at(products, 2).casing == "steel"
      # Second product: "Brass" in title
      assert Enum.at(products, 1).casing == "brass"
    end

    test "detects subsonic from title", %{html: html} do
      products = PalmettoStateArmory.parse_products(html)
      # Fourth product: "Subsonic" in title
      assert Enum.at(products, 3).subsonic == true
    end

    test "non-subsonic products return false", %{html: html} do
      [first | _] = PalmettoStateArmory.parse_products(html)
      assert first.subsonic == false
    end

    test "extracts brand from beginning of title", %{html: html} do
      products = PalmettoStateArmory.parse_products(html)
      assert hd(products).brand == "TROY"
      assert Enum.at(products, 1).brand == "CCI"
      assert Enum.at(products, 2).brand == "Tula"
    end
  end
end