# frozen_string_literal: true

require "mime/types"
require "minitest_helper"

describe MIME::Type do
  def mime_type(content_type)
    MIME::Type.new(content_type) { |mt| yield mt if block_given? }
  end

  let(:x_appl_x_zip) {
    mime_type("x-appl/x-zip") { |t| t.extensions = %w[zip zp] }
  }
  let(:text_plain) { mime_type("text/plain") }
  let(:text_html) { mime_type("text/html") }
  let(:image_jpeg) { mime_type("image/jpeg") }
  let(:application_javascript) {
    mime_type("application/javascript") do |js|
      js.friendly("en" => "JavaScript")
      js.xrefs = {
        "rfc" => %w[rfc4239 rfc4239],
        "template" => %w[application/javascript]
      }
      js.encoding = "8bit"
      js.extensions = %w[js sj]
      js.registered = true
    end
  }
  let(:text_x_yaml) {
    mime_type("text/x-yaml") do |yaml|
      yaml.extensions = %w[yaml yml]
      yaml.encoding = "8bit"
      yaml.friendly("en" => "YAML Structured Document")
    end
  }
  let(:text_x_yaml_with_docs) {
    text_x_yaml.dup.tap do |yaml|
      yaml.docs = "Test YAML"
    end
  }

  describe ".simplified" do
    it "leaves normal types alone" do
      assert_equal "text/plain", MIME::Type.simplified("text/plain")
    end

    it "does not remove x- prefixes by default" do
      assert_equal "application/x-msword",
        MIME::Type.simplified("application/x-msword")
      assert_equal "x-xyz/abc", MIME::Type.simplified("x-xyz/abc")
    end

    it "removes x- prefixes when requested" do
      assert_equal "application/msword",
        MIME::Type.simplified("application/x-msword", remove_x_prefix: true)
      assert_equal "xyz/abc",
        MIME::Type.simplified("x-xyz/abc", remove_x_prefix: true)
    end

    it "lowercases mixed-case types" do
      assert_equal "text/vcard", MIME::Type.simplified("text/vCard")
    end

    it "returns nil when the value provided is not a valid content type" do
      assert_nil MIME::Type.simplified("text")
    end
  end

  describe ".i18n_key" do
    it "converts text/plain to text.plain" do
      assert_equal "text.plain", MIME::Type.i18n_key("text/plain")
    end

    it "does not remove x-prefixes" do
      assert_equal "application.x-msword",
        MIME::Type.i18n_key("application/x-msword")
    end

    it "converts text/vCard to text.vcard" do
      assert_equal "text.vcard", MIME::Type.i18n_key("text/vCard")
    end

    it "returns nil when the value provided is not a valid content type" do
      assert_nil MIME::Type.i18n_key("text")
    end
  end

  describe ".new" do
    it "fails if an invalid content type is provided" do
      exception = assert_raises MIME::Type::InvalidContentType do
        MIME::Type.new("apps")
      end
      assert_equal 'Invalid Content-Type "apps"', exception.to_s
    end

    it "creates a valid content type just from a string" do
      type = MIME::Type.new("text/x-yaml")

      assert_instance_of MIME::Type, type
      assert_equal "text/x-yaml", type.content_type
    end

    it "yields the content type in a block" do
      MIME::Type.new("text/x-yaml") do |type|
        assert_instance_of MIME::Type, type
        assert_equal "text/x-yaml", type.content_type
      end
    end

    it "creates a valid content type from a hash" do
      type = MIME::Type.new(
        "content-type" => "text/x-yaml",
        "obsolete" => true
      )
      assert_instance_of MIME::Type, type
      assert_equal "text/x-yaml", type.content_type
      assert type.obsolete?
    end

    it "creates a valid content type from an array" do
      type = MIME::Type.new(%w[text/x-yaml yaml yml yz])
      assert_instance_of MIME::Type, type
      assert_equal "text/x-yaml", type.content_type
      assert_equal %w[yaml yml yz], type.extensions
    end
  end

  describe "#like?" do
    it "compares two MIME::Types on #simplified values without x- prefixes" do
      assert text_plain.like?(text_plain)
      refute text_plain.like?(text_html)
    end

    it "compares MIME::Type against string without x- prefixes" do
      assert text_plain.like?(text_plain.to_s)
      refute text_plain.like?(text_html.to_s)
    end
  end

  describe "#<=>" do
    it "correctly compares identical types" do
      assert_equal text_plain, text_plain
    end

    it "correctly compares equivalent types" do
      right = mime_type("text/Plain")
      refute_same text_plain, right
      assert_equal text_plain, right
    end

    it "correctly compares types that sort earlier" do
      refute_equal text_html, text_plain
      assert_operator text_html, :<, text_plain
    end

    it "correctly compares types that sort later" do
      refute_equal text_plain, text_html
      assert_operator text_plain, :>, text_html
    end

    it "correctly compares types against equivalent strings" do
      assert_equal text_plain, "text/plain"
    end

    it "correctly compares types against strings that sort earlier" do
      refute_equal text_html, "text/plain"
      assert_operator text_html, :<, "text/plain"
    end

    it "correctly compares types against strings that sort later" do
      refute_equal text_plain, "text/html"
      assert_operator text_plain, :>, "text/html"
    end

    it "correctly compares against nil" do
      refute_equal text_html, nil
      assert_operator text_plain, :<, nil
    end
  end

  describe "#ascii?" do
    it "defaults to true for text/* types" do
      assert text_plain.ascii?
    end

    it "defaults to false for non-text/* types" do
      refute image_jpeg.ascii?
    end
  end

  describe "#binary?" do
    it "defaults to false for text/* types" do
      refute text_plain.binary?
    end

    it "defaults to true for non-text/* types" do
      assert image_jpeg.binary?
    end
  end

  describe "#complete?" do
    it "is true when there are extensions" do
      assert text_x_yaml.complete?
    end

    it "is false when there are no extensions" do
      refute mime_type("text/plain").complete?
    end
  end

  describe "#content_type" do
    it "preserves the original case" do
      assert_equal "text/plain", text_plain.content_type
      assert_equal "text/vCard", mime_type("text/vCard").content_type
    end

    it "does not remove x- prefixes" do
      assert_equal "x-appl/x-zip", x_appl_x_zip.content_type
    end
  end

  describe "#default_encoding" do
    it "is quoted-printable for text/* types" do
      assert_equal "quoted-printable", text_plain.default_encoding
    end

    it "is base64 for non-text/* types" do
      assert_equal "base64", image_jpeg.default_encoding
    end
  end

  describe "#encoding, #encoding=" do
    it "returns #default_encoding if not set explicitly" do
      assert_equal "quoted-printable", text_plain.encoding
      assert_equal "base64", image_jpeg.encoding
    end

    it "returns the set value when set" do
      text_plain.encoding = "8bit"
      assert_equal "8bit", text_plain.encoding
    end

    it "resets to the default encoding when set to nil or :default" do
      text_plain.encoding = "8bit"
      text_plain.encoding = nil
      assert_equal text_plain.default_encoding, text_plain.encoding
      text_plain.encoding = :default
      assert_equal text_plain.default_encoding, text_plain.encoding
    end

    it "raises a MIME::Type::InvalidEncoding for an invalid encoding" do
      exception = assert_raises MIME::Type::InvalidEncoding do
        text_plain.encoding = "binary"
      end
      assert_equal 'Invalid Encoding "binary"', exception.to_s
    end
  end

  describe "#eql?" do
    it "is not true for a non-MIME::Type" do
      refute text_plain.eql?("text/plain")
    end

    it "is not true for a different MIME::Type" do
      refute text_plain.eql?(image_jpeg)
    end

    it "is true for an equivalent MIME::Type" do
      assert text_plain, mime_type("text/Plain")
    end
  end

  describe "#extensions, #extensions=" do
    it "returns an array of extensions" do
      assert_equal %w[yaml yml], text_x_yaml.extensions
      assert_equal %w[zip zp], x_appl_x_zip.extensions
    end

    it "sets a single extension when provided a single value" do
      text_x_yaml.extensions = "yaml"
      assert_equal %w[yaml], text_x_yaml.extensions
    end

    it "deduplicates extensions" do
      text_x_yaml.extensions = %w[yaml yaml]
      assert_equal %w[yaml], text_x_yaml.extensions
    end
  end

  describe "#add_extensions" do
    it "does not modify extensions when provided nil" do
      text_x_yaml.add_extensions(nil)
      assert_equal %w[yaml yml], text_x_yaml.extensions
    end

    it "remains deduplicated with duplicate values" do
      text_x_yaml.add_extensions("yaml")
      assert_equal %w[yaml yml], text_x_yaml.extensions
      text_x_yaml.add_extensions(%w[yaml yz])
      assert_equal %w[yaml yml yz], text_x_yaml.extensions
    end
  end

  describe "#priority_compare" do
    def assert_priority_less(left, right)
      assert_equal(-1, left.priority_compare(right))
    end

    def assert_priority_same(left, right)
      assert_equal 0, left.priority_compare(right)
    end

    def assert_priority_more(left, right)
      assert_equal 1, left.priority_compare(right)
    end

    def assert_priority(left, middle, right)
      assert_priority_less left, right
      assert_priority_same left, middle
      assert_priority_more right, left
    end

    let(:text_1) { mime_type("text/1") }
    let(:text_1p) { mime_type("text/1") }
    let(:text_2) { mime_type("text/2") }

    it "sorts (1) based on the simplified type" do
      assert_priority text_1, text_1p, text_2
    end

    it "sorts (2) based on extensions" do
      text_1.extensions = ["foo", "bar"]
      text_2.extensions = ["foo"]

      assert_priority_same text_1, text_2

      text_2.registered = true

      assert_priority_more text_1, text_2
    end

    it "sorts (3) based on the registration state" do
      text_1.registered = text_1p.registered = true
      text_1b = mime_type(text_1) { |t| t.registered = false }

      assert_priority text_1, text_1p, text_1b
    end

    it "sorts (4) based on the completeness" do
      text_1.extensions = text_1p.extensions = "1"
      text_1b = mime_type(text_1) { |t| t.extensions = nil }

      assert_priority text_1, text_1p, text_1b
    end

    it "sorts (5) based on obsolete status" do
      text_1.obsolete = text_1p.obsolete = false
      text_1b = mime_type(text_1) { |t| t.obsolete = true }

      assert_priority text_1, text_1p, text_1b
    end

    it "sorts (5) based on the use-instead value" do
      text_1.obsolete = text_1p.obsolete = true
      text_1.use_instead = text_1p.use_instead = "abc/xyz"
      text_1b = mime_type(text_1) { |t| t.use_instead = nil }

      assert_priority text_1, text_1p, text_1b

      text_1b.use_instead = "abc/zzz"

      assert_priority text_1, text_1p, text_1b
    end
  end

  describe "#raw_media_type" do
    it "extracts the media type as case-preserved" do
      assert_equal "Text", mime_type("Text/plain").raw_media_type
    end

    it "does not remove x- prefixes" do
      assert_equal("x-appl", x_appl_x_zip.raw_media_type)
    end
  end

  describe "#media_type" do
    it "extracts the media type as lowercase" do
      assert_equal "text", text_plain.media_type
    end

    it "does not remove x- prefixes" do
      assert_equal("x-appl", x_appl_x_zip.media_type)
    end
  end

  describe "#raw_media_type" do
    it "extracts the media type as case-preserved" do
      assert_equal "Text", mime_type("Text/plain").raw_media_type
    end

    it "does not remove x- prefixes" do
      assert_equal("x-appl", x_appl_x_zip.raw_media_type)
    end
  end

  describe "#sub_type" do
    it "extracts the sub type as lowercase" do
      assert_equal "plain", text_plain.sub_type
    end

    it "does not remove x- prefixes" do
      assert_equal("x-zip", x_appl_x_zip.sub_type)
    end
  end

  describe "#raw_sub_type" do
    it "extracts the sub type as case-preserved" do
      assert_equal "Plain", mime_type("text/Plain").raw_sub_type
    end

    it "does not remove x- prefixes" do
      assert_equal("x-zip", x_appl_x_zip.raw_sub_type)
    end
  end

  describe "#to_h" do
    let(:t) { mime_type("a/b") }

    it "has the required keys (content-type, registered, encoding)" do
      assert_has_keys t.to_h, %w[content-type registered encoding]
    end

    it "has the docs key if there are documents" do
      assert_has_keys mime_type(t) { |v| v.docs = "a" }.to_h, %w[docs]
    end

    it "has the extensions key if set" do
      assert_has_keys mime_type(t) { |v| v.extensions = "a" }.to_h,
        "extensions"
    end

    it "has the preferred-extension key if set" do
      assert_has_keys mime_type(t) { |v| v.preferred_extension = "a" }.to_h,
        "preferred-extension"
    end

    it "has the obsolete key if set" do
      assert_has_keys mime_type(t) { |v| v.obsolete = true }.to_h, "obsolete"
    end

    it "has the obsolete and use-instead keys if set" do
      assert_has_keys mime_type(t) { |v|
        v.obsolete = true
        v.use_instead = "c/d"
      }.to_h, %w[obsolete use-instead]
    end

    it "has the signature key if set" do
      assert_has_keys mime_type(t) { |v| v.signature = true }.to_h, "signature"
    end
  end

  describe "#to_json" do
    let(:expected_1) {
      '{"content-type":"a/b","encoding":"base64","registered":false}'
    }
    let(:expected_2) {
      '{"content-type":"a/b","encoding":"base64","registered":true,"provisional":true}'
    }

    it "converts to JSON when requested" do
      assert_equal expected_1, mime_type("a/b").to_json
    end

    it "converts to JSON with provisional when requested" do
      type = mime_type("a/b") do |t|
        t.registered = true
        t.provisional = true
      end
      assert_equal expected_2, type.to_json
    end
  end

  describe "#to_s, #to_str" do
    it "represents itself as a string of the canonical content_type" do
      assert_equal "text/plain", text_plain.to_s
    end

    it "acts like a string of the canonical content_type for comparison" do
      assert_equal text_plain, "text/plain"
    end

    it "acts like a string for other purposes" do
      assert_equal "stringy", "text/plain".sub(text_plain, "stringy")
    end
  end

  describe "#xrefs, #xrefs=" do
    let(:expected) {
      MIME::Types::Container.new("rfc" => Set["rfc1234", "rfc5678"])
    }

    it "returns the expected results" do
      application_javascript.xrefs = {
        "rfc" => %w[rfc5678 rfc1234 rfc1234]
      }

      assert_equal expected, application_javascript.xrefs
    end
  end

  describe "#xref_urls" do
    let(:expected) {
      [
        "http://www.iana.org/go/draft1",
        "http://www.iana.org/assignments/media-types/a/b",
        "http://www.iana.org/assignments/media-types/media-types.xhtml#p-1",
        "http://www.iana.org/go/rfc-1",
        "http://www.rfc-editor.org/errata_search.php?eid=err-1",
        "http://example.org",
        "text"
      ]
    }

    let(:type) {
      mime_type("a/b").tap do |t|
        t.xrefs = {
          "draft" => ["RFC1"],
          "template" => ["a/b"],
          "person" => ["p-1"],
          "rfc" => ["rfc-1"],
          "rfc-errata" => ["err-1"],
          "uri" => ["http://example.org"],
          "text" => ["text"]
        }
      end
    }

    it "translates according to given rules" do
      assert_equal expected, type.xref_urls
    end
  end

  describe "#use_instead" do
    it "is nil unless the type is obsolete" do
      assert_nil text_plain.use_instead
    end

    it "is nil if not set and the type is obsolete" do
      text_plain.obsolete = true
      assert_nil text_plain.use_instead
    end

    it "is a different type if set and the type is obsolete" do
      text_plain.obsolete = true
      text_plain.use_instead = "text/html"
      assert_equal "text/html", text_plain.use_instead
    end
  end

  describe "#preferred_extension, #preferred_extension=" do
    it "is nil when not set and there are no extensions" do
      assert_nil text_plain.preferred_extension
    end

    it "is the first extension when not set but there are extensions" do
      assert_equal "yaml", text_x_yaml.preferred_extension
    end

    it "is the extension provided when set" do
      text_x_yaml.preferred_extension = "yml"
      assert_equal "yml", text_x_yaml.preferred_extension
    end

    it "is adds the preferred extension if it does not exist" do
      text_x_yaml.preferred_extension = "yz"
      assert_equal "yz", text_x_yaml.preferred_extension
      assert_includes text_x_yaml.extensions, "yz"
    end
  end

  describe "#friendly" do
    it "returns English by default" do
      assert_equal "YAML Structured Document", text_x_yaml.friendly
    end

    it "returns English when requested" do
      assert_equal "YAML Structured Document", text_x_yaml.friendly("en")
      assert_equal "YAML Structured Document", text_x_yaml.friendly(:en)
    end

    it "returns nothing for an unknown language" do
      assert_nil text_x_yaml.friendly("zz")
    end

    it "merges new values from an array parameter" do
      expected = {"en" => "Text files"}
      assert_equal expected, text_plain.friendly(["en", "Text files"])
      expected.update("fr" => "des fichiers texte")
      assert_equal expected,
        text_plain.friendly(["fr", "des fichiers texte"])
    end

    it "merges new values from a hash parameter" do
      expected = {"en" => "Text files"}
      assert_equal expected, text_plain.friendly(expected)
      french = {"fr" => "des fichiers texte"}
      expected.update(french)
      assert_equal expected, text_plain.friendly(french)
    end

    it "raises an ArgumentError if an unknown value is provided" do
      exception = assert_raises ArgumentError do
        text_plain.friendly(1)
      end

      assert_equal "Expected a language or translation set, not 1",
        exception.message
    end
  end
end