/* global Int8Array:true */
import {
  escapeExpression,
  emailValid,
  extractDomainFromUrl,
  avatarUrl,
  getRawSize,
  avatarImg,
  defaultHomepage,
  setDefaultHomepage,
  caretRowCol,
  setCaretPosition,
  toAsciiPrintable,
  slugify,
  fillMissingDates,
  inCodeBlock
} from "discourse/lib/utilities";
import Handlebars from "handlebars";
import { discourseModule } from "helpers/qunit-helpers";

discourseModule("lib:utilities");

QUnit.test("escapeExpression", assert => {
  assert.equal(escapeExpression(">"), ">", "escapes unsafe characters");

  assert.equal(
    escapeExpression(new Handlebars.SafeString(">")),
    ">",
    "does not double-escape safe strings"
  );

  assert.equal(
    escapeExpression(undefined),
    "",
    "returns a falsy string when given a falsy value"
  );
});

QUnit.test("emailValid", assert => {
  assert.ok(
    emailValid("Bob@example.com"),
    "allows upper case in the first part of emails"
  );
  assert.ok(
    emailValid("bob@EXAMPLE.com"),
    "allows upper case in the email domain"
  );
});

QUnit.test("extractDomainFromUrl", assert => {
  assert.equal(
    extractDomainFromUrl("http://meta.discourse.org:443/random"),
    "meta.discourse.org",
    "extract domain name from url"
  );
  assert.equal(
    extractDomainFromUrl("meta.discourse.org:443/random"),
    "meta.discourse.org",
    "extract domain regardless of scheme presence"
  );
  assert.equal(
    extractDomainFromUrl("http://192.168.0.1:443/random"),
    "192.168.0.1",
    "works for IP address"
  );
  assert.equal(
    extractDomainFromUrl("http://localhost:443/random"),
    "localhost",
    "works for localhost"
  );
});

QUnit.test("avatarUrl", assert => {
  var rawSize = getRawSize;
  assert.blank(avatarUrl("", "tiny"), "no template returns blank");
  assert.equal(
    avatarUrl("/fake/template/{size}.png", "tiny"),
    "/fake/template/" + rawSize(20) + ".png",
    "simple avatar url"
  );
  assert.equal(
    avatarUrl("/fake/template/{size}.png", "large"),
    "/fake/template/" + rawSize(45) + ".png",
    "different size"
  );
});

var setDevicePixelRatio = function(value) {
  if (Object.defineProperty && !window.hasOwnProperty("devicePixelRatio")) {
    Object.defineProperty(window, "devicePixelRatio", { value: 2 });
  } else {
    window.devicePixelRatio = value;
  }
};

QUnit.test("avatarImg", assert => {
  var oldRatio = window.devicePixelRatio;
  setDevicePixelRatio(2);

  var avatarTemplate = "/path/to/avatar/{size}.png";
  assert.equal(
    avatarImg({ avatarTemplate: avatarTemplate, size: "tiny" }),
    "<img alt='' width='20' height='20' src='/path/to/avatar/40.png' class='avatar'>",
    "it returns the avatar html"
  );

  assert.equal(
    avatarImg({
      avatarTemplate: avatarTemplate,
      size: "tiny",
      title: "evilest trout"
    }),
    "<img alt='' width='20' height='20' src='/path/to/avatar/40.png' class='avatar' title='evilest trout' aria-label='evilest trout'>",
    "it adds a title if supplied"
  );

  assert.equal(
    avatarImg({
      avatarTemplate: avatarTemplate,
      size: "tiny",
      extraClasses: "evil fish"
    }),
    "<img alt='' width='20' height='20' src='/path/to/avatar/40.png' class='avatar evil fish'>",
    "it adds extra classes if supplied"
  );

  assert.blank(
    avatarImg({ avatarTemplate: "", size: "tiny" }),
    "it doesn't render avatars for invalid avatar template"
  );

  setDevicePixelRatio(oldRatio);
});

QUnit.test("defaultHomepage", function(assert) {
  this.siteSettings.top_menu = "latest|top|hot";
  assert.equal(
    defaultHomepage(),
    "latest",
    "default homepage is the first item in the top_menu site setting"
  );
  var meta = document.createElement("meta");
  meta.name = "discourse_current_homepage";
  meta.content = "hot";
  document.body.appendChild(meta);
  assert.equal(
    defaultHomepage(),
    "hot",
    "default homepage is pulled from <meta name=discourse_current_homepage>"
  );
  document.body.removeChild(meta);
});

QUnit.test("setDefaultHomepage", assert => {
  var meta = document.createElement("meta");
  meta.name = "discourse_current_homepage";
  meta.content = "hot";
  document.body.appendChild(meta);
  setDefaultHomepage("top");
  assert.equal(
    meta.content,
    "top",
    "default homepage set by setDefaultHomepage"
  );
  document.body.removeChild(meta);
});

QUnit.test("caretRowCol", assert => {
  var textarea = document.createElement("textarea");
  const content = document.createTextNode("01234\n56789\n012345");
  textarea.appendChild(content);
  document.body.appendChild(textarea);

  const assertResult = (setCaretPos, expectedRowNum, expectedColNum) => {
    setCaretPosition(textarea, setCaretPos);

    const result = caretRowCol(textarea);
    assert.equal(
      result.rowNum,
      expectedRowNum,
      "returns the right row of the caret"
    );
    assert.equal(
      result.colNum,
      expectedColNum,
      "returns the right col of the caret"
    );
  };

  assertResult(0, 1, 0);
  assertResult(5, 1, 5);
  assertResult(6, 2, 0);
  assertResult(11, 2, 5);
  assertResult(14, 3, 2);

  document.body.removeChild(textarea);
});

QUnit.test("toAsciiPrintable", assert => {
  const accentedString = "Créme_Brûlée!";
  const unicodeString = "談話";

  assert.equal(
    toAsciiPrintable(accentedString, "discourse"),
    "Creme_Brulee!",
    "it replaces accented characters with the appropriate ASCII equivalent"
  );

  assert.equal(
    toAsciiPrintable(unicodeString, "discourse"),
    "discourse",
    "it uses the fallback string when unable to convert"
  );

  assert.strictEqual(
    typeof toAsciiPrintable(unicodeString),
    "undefined",
    "it returns undefined when unable to convert and no fallback is provided"
  );
});

QUnit.test("slugify", assert => {
  const asciiString = "--- 0__( Some-cool Discourse Site! )__0 --- ";
  const accentedString = "Créme_Brûlée!";
  const unicodeString = "談話";

  assert.equal(
    slugify(asciiString),
    "0-some-cool-discourse-site-0",
    "it properly slugifies an ASCII string"
  );

  assert.equal(
    slugify(accentedString),
    "crme-brle",
    "it removes accented characters"
  );

  assert.equal(slugify(unicodeString), "", "it removes unicode characters");
});

QUnit.test("fillMissingDates", assert => {
  const startDate = "2017-11-12"; // YYYY-MM-DD
  const endDate = "2017-12-12"; // YYYY-MM-DD
  const data =
    '[{"x":"2017-11-12","y":3},{"x":"2017-11-27","y":2},{"x":"2017-12-06","y":9},{"x":"2017-12-11","y":2}]';

  assert.equal(
    fillMissingDates(JSON.parse(data), startDate, endDate).length,
    31,
    "it returns a JSON array with 31 dates"
  );
});

QUnit.test("inCodeBlock", assert => {
  const text =
    "000\n\n```\n111\n```\n\n000\n\n`111 111`\n\n000\n\n[code]\n111\n[/code]\n\n    111\n\t111\n\n000`000";
  for (let i = 0; i < text.length; ++i) {
    if (text[i] === "0") {
      assert.notOk(inCodeBlock(text, i), `position ${i} is not in code block`);
    } else if (text[i] === "1") {
      assert.ok(inCodeBlock(text, i), `position ${i} is in code block`);
    }
  }
});

QUnit.skip("inCodeBlock - runs fast", assert => {
  const phrase = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
  const text = `${phrase}\n\n\`\`\`\n${phrase}\n\`\`\`\n\n${phrase}\n\n\`${phrase}\n${phrase}\n\n${phrase}\n\n[code]\n${phrase}\n[/code]\n\n${phrase}\n\n    ${phrase}\n\n\`${phrase}\`\n\n${phrase}`;

  let time = Number.MAX_VALUE;
  for (let i = 0; i < 10; ++i) {
    const start = performance.now();
    inCodeBlock(text, text.length);
    const end = performance.now();
    time = Math.min(time, end - start);
  }

  // This runs in 'keyUp' event handler so it should run as fast as
  // possible. It should take less than 1ms for the test text.
  assert.ok(time < 10);
});