# frozen_string_literal: true

require "i18n/backend/discourse_i18n"
require "translation_override"

RSpec.describe I18n::Backend::DiscourseI18n do
  let(:backend) { I18n::Backend::DiscourseI18n.new }

  before do
    backend.reload!
    backend.store_translations(:en, foo: "Foo in :en", bar: "Bar in :en", wat: "Hello %{count}")
    backend.store_translations(:en, items: { one: "one item", other: "%{count} items" })
    backend.store_translations(:de, bar: "Bar in :de")
    backend.store_translations(:en, link: "[text](url)")
  end

  after { backend.reload! }

  it "translates the basics as expected" do
    expect(backend.translate(:en, "foo")).to eq("Foo in :en")
    expect(backend.translate(:en, "items", count: 1)).to eq("one item")
    expect(backend.translate(:en, "items", count: 3)).to eq("3 items")
    expect(backend.translate(:en, "wat", count: 3)).to eq("Hello 3")
  end

  it "can be searched by key or value" do
    expect(backend.search(:en, "fo")).to eq("foo" => "Foo in :en")
    expect(backend.search(:en, "foo")).to eq("foo" => "Foo in :en")
    expect(backend.search(:en, "Foo")).to eq("foo" => "Foo in :en")
    expect(backend.search(:en, "hello")).to eq("wat" => "Hello %{count}")
    expect(backend.search(:en, "items.one")).to eq("items.one" => "one item")
    expect(backend.search(:en, "](")).to eq("link" => "[text](url)")
  end

  it "can return multiple results" do
    results = backend.search(:en, "item")

    expect(results["items.one"]).to eq("one item")
    expect(results["items.other"]).to eq("%{count} items")
  end

  describe "fallbacks" do
    it "uses fallback locales for translating" do
      expect(backend.translate(:de, "bar")).to eq("Bar in :de")
      expect(backend.translate(:de, "foo")).to eq("Foo in :en")
    end
  end

  describe "#exists?" do
    it "returns true when a key is given that exists" do
      expect(backend.exists?(:de, :bar)).to eq(true)
    end

    it "returns true when a key is given that exists in a fallback locale of the locale" do
      expect(backend.exists?(:de, :foo)).to eq(true)
    end

    it "returns true when an existing key and an existing locale is given" do
      expect(backend.exists?(:en, :foo)).to eq(true)
      expect(backend.exists?(:de, :bar)).to eq(true)
    end

    it "returns false when a non-existing key and an existing locale is given" do
      expect(backend.exists?(:en, :bogus)).to eq(false)
      expect(backend.exists?(:de, :bogus)).to eq(false)
      expect(backend.exists?(:ru, :bogus)).to eq(false)
    end

    it "returns true when a key is given which is missing from the given locale and exists in a fallback locale" do
      expect(backend.exists?(:de, :foo)).to eq(true)
      expect(backend.exists?(:ru, :foo)).to eq(true)
    end

    it "returns true when a key is given which is missing from the given locale and all its fallback locales" do
      expect(backend.exists?(:de, :baz)).to eq(false)
      expect(backend.exists?(:ru, :bogus)).to eq(false)
    end
  end

  describe "#pluralize" do
    it "uses fallback locales when a pluralization key is missing" do
      SiteSetting.default_locale = "ru"

      backend.store_translations(
        :ru,
        items: {
          one: "%{count} Russian item",
          many: "%{count} Russian items are many",
          other: "%{count} Russian items",
        },
      )

      expect(backend.translate(:ru, :items, count: 1)).to eq("1 Russian item")
      expect(backend.translate(:ru, :items, count: 2)).to eq("2 items")
      expect(backend.translate(:ru, :items, count: 5)).to eq("5 Russian items are many")
      expect(backend.translate(:ru, :items, count: 10.2)).to eq("10.2 Russian items")

      backend.store_translations(
        :ru,
        items: {
          one: "%{count} Russian item",
          few: "%{count} Russian items are a few",
          many: "%{count} Russian items are many",
          other: "%{count} Russian items",
        },
      )
      expect(backend.translate(:ru, :items, count: 2)).to eq("2 Russian items are a few")

      backend.store_translations(:en, airplanes: { one: "%{count} airplane" })
      expect(backend.translate(:ru, :airplanes, count: 1)).to eq("1 airplane")
      expect { backend.translate(:ru, :airplanes, count: 2) }.to raise_error(
        I18n::InvalidPluralizationData,
      )
    end
  end

  describe ".sort_local_files" do
    it "sorts an array of client ymls with '-(highest-number)' being last" do
      expect(
        I18n::Backend::DiscourseI18n.sort_locale_files(
          %w[
            discourse/plugins/discourse-second/config/locales/client-99.es.yml
            discourse/plugins/discourse-first/config/locales/client.es.yml
            discourse/plugins/discourse-third/config/locales/client-2.es.yml
            discourse/plugins/discourse-third/config/locales/client-3.bs_BA.yml
          ],
        ),
      ).to eq(
        %w[
          discourse/plugins/discourse-first/config/locales/client.es.yml
          discourse/plugins/discourse-third/config/locales/client-2.es.yml
          discourse/plugins/discourse-third/config/locales/client-3.bs_BA.yml
          discourse/plugins/discourse-second/config/locales/client-99.es.yml
        ],
      )
    end
  end
end