"use strict";

var assert = require("node:assert");
var chai = require("chai");
var sinon = require("sinon");
var helpers = require("./helpers");
var reporters = require("../../").reporters;
var AssertionError = assert.AssertionError;
var Base = reporters.Base;
var chaiExpect = chai.expect;
var createElements = helpers.createElements;
var makeTest = helpers.makeTest;
var Mocha = require("../../");
var Suite = Mocha.Suite;
var Runner = Mocha.Runner;

describe("Base reporter", function () {
  var stdout;

  function list(tests) {
    try {
      Base.list(tests);
    } finally {
      sinon.restore();
    }
  }

  function generateDiff(actual, expected) {
    var diffStr;

    try {
      diffStr = Base.generateDiff(actual, expected);
    } finally {
      sinon.restore();
    }

    return diffStr;
  }

  var gather = function (chunk) {
    stdout.push(chunk);
  };

  beforeEach(function () {
    sinon.stub(Base, "useColors").value(false);
    sinon.stub(process.stdout, "write").callsFake(gather);
    stdout = [];
  });

  afterEach(function () {
    sinon.restore();
  });

  describe("showDiff", function () {
    var err;

    beforeEach(function () {
      err = new AssertionError({ actual: "foo", expected: "bar" });
    });

    it("should show diffs by default", function () {
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /- actual/);
      expect(errOut, "to match", /\+ expected/);
    });

    it("should show diffs if 'err.showDiff' is true", function () {
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /- actual/);
      expect(errOut, "to match", /\+ expected/);
    });

    it("should not show diffs if 'err.showDiff' is false", function () {
      err.showDiff = false;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "not to match", /- actual/);
      expect(errOut, "not to match", /\+ expected/);
    });

    it("should not show diffs if 'expected' is not defined", function () {
      var _err = new Error("ouch");
      var test = makeTest(_err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "not to match", /- actual/);
      expect(errOut, "not to match", /\+ expected/);
    });

    it("should not show diffs if 'hideDiff' is true", function () {
      var test = makeTest(err);

      sinon.stub(Base, "hideDiff").value(true);
      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "not to match", /- actual/);
      expect(errOut, "not to match", /\+ expected/);
    });
  });

  describe("getting two strings", function () {
    // Fix regression V1.2.1(see: issue #1241)
    it("should show strings diff as is", function () {
      var err = new Error("test");
      err.actual = "foo\nbar";
      err.expected = "foo\nbaz";
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "not to match", /"foo\\nbar"/);
      expect(errOut, "to match", /foo/).and("to match", /bar/);
      expect(errOut, "to match", /test/);
      expect(errOut, "to match", /actual/);
      expect(errOut, "to match", /expected/);
    });
  });

  describe("diff generation", function () {
    var inlineDiffsStub;

    beforeEach(function () {
      inlineDiffsStub = sinon.stub(Base, "inlineDiffs").value(false);
    });

    it("should generate unified diffs if 'inlineDiffs' is false", function () {
      var actual = "a foo unified diff";
      var expected = "a bar unified diff";

      var output = generateDiff(actual, expected);

      expect(
        output,
        "to be",
        "\n      + expected - actual\n\n      -a foo unified diff\n      +a bar unified diff\n      ",
      );
    });

    it("should generate inline diffs if 'inlineDiffs' is true", function () {
      var actual = "a foo inline diff";
      var expected = "a bar inline diff";

      inlineDiffsStub.value(true);
      var output = generateDiff(actual, expected);

      expect(
        output,
        "to be",
        "      \n      actual expected\n      \n      a foobar inline diff\n      ",
      );
    });

    it("should truncate overly long 'actual' ", function () {
      var actual = "";
      var i = 0;
      while (i++ < 500) {
        actual += "a foo unified diff ";
      }
      var expected = "a bar unified diff";

      var output = generateDiff(actual, expected);

      expect(output, "to match", /output truncated/);
    });

    it("should truncate overly long 'expected' ", function () {
      var actual = "a foo unified diff";
      var expected = "";
      var i = 0;
      while (i++ < 500) {
        expected += "a bar unified diff ";
      }

      var output = generateDiff(actual, expected);

      expect(output, "to match", /output truncated/);
    });

    it("should not truncate overly long 'actual' if maxDiffSize=0", function () {
      var actual = "";
      var i = 0;
      while (i++ < 120) {
        actual += "a bar unified diff ";
      }
      var expected = "b foo unified diff";

      sinon.stub(Base, "maxDiffSize").value(0);
      var output = generateDiff(actual, expected);

      expect(output, "not to match", /output truncated/);
    });

    it("should not truncate overly long 'expected' if maxDiffSize=0", function () {
      var actual = "a foo unified diff";
      var expected = "";
      var i = 0;
      while (i++ < 120) {
        expected += "a bar unified diff ";
      }

      sinon.stub(Base, "maxDiffSize").value(0);
      var output = generateDiff(actual, expected);

      expect(output, "not to match", /output truncated/);
    });
  });

  describe("inline strings diff", function () {
    beforeEach(function () {
      sinon.stub(Base, "inlineDiffs").value(true);
    });

    it("should show single line diff if 'inlineDiffs' is true", function () {
      var err = new Error("test");
      err.actual = "a foo inline diff";
      err.expected = "a bar inline diff";
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /a foobar inline diff/);
      expect(errOut, "to match", /test/);
      expect(errOut, "to match", /actual/);
      expect(errOut, "to match", /expected/);
    });

    it("should split lines if string has more than 4 line breaks", function () {
      var err = new Error("test");
      err.actual = "a\nfoo\ninline\ndiff\nwith\nmultiple lines";
      err.expected = "a\nbar\ninline\ndiff\nwith\nmultiple lines";
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /1 \| a/);
      expect(errOut, "to match", /2 \| foobar/);
      expect(errOut, "to match", /3 \| inline/);
      expect(errOut, "to match", /4 \| diff/);
      expect(errOut, "to match", /5 \| with/);
      expect(errOut, "to match", /6 \| multiple lines/);
      expect(errOut, "to match", /test/);
      expect(errOut, "to match", /actual/);
      expect(errOut, "to match", /expected/);
    });
  });

  describe("unified diff", function () {
    beforeEach(function () {
      sinon.stub(Base, "inlineDiffs").value(false);
    });

    it("should separate diff hunks by two dashes", function () {
      var err = new Error("test");
      err.actual = createElements({ from: 2, to: 11 });
      err.expected = createElements({ from: 1, to: 10 });
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");

      var regexesToMatch = [
        /\[/,
        /\+ {2}"element 1"/,
        /"element 2"/,
        /"element 3"/,
        /"element 4"/,
        /"element 5"/,
        /--/,
        /"element 7"/,
        /"element 8"/,
        /"element 9"/,
        /"element 10"/,
        /- {2}"element 11"/,
        /]/,
        /test/,
        /expected/,
        /actual/,
      ];

      regexesToMatch.forEach(function (aRegex) {
        expect(errOut, "to match", aRegex);
      });
    });
  });

  describe("when 'reporterOption.maxDiffSize' is provided", function () {
    var origSize;

    beforeEach(function () {
      sinon.restore();
      origSize = Base.maxDiffSize;
    });

    afterEach(function () {
      Base.maxDiffSize = origSize;
    });

    it("should set 'Base.maxDiffSize' used for truncating diffs", function () {
      var options = {
        reporterOption: {
          maxDiffSize: 4,
        },
      };
      var suite = new Suite("Dummy suite", "root");
      var runner = new Runner(suite);
      // eslint-disable-next-line no-unused-vars
      var base = new Base(runner, options);
      expect(Base.maxDiffSize, "to be", 4);
    });
  });

  it("should stringify objects", function () {
    var err = new Error("test");
    err.actual = { key: "a1" };
    err.expected = { key: "e1" };
    err.showDiff = true;
    var test = makeTest(err);

    list([test]);

    var errOut = stdout.join("\n");
    expect(errOut, "to match", /"key"/);
    expect(errOut, "to match", /test/);
    expect(errOut, "to match", /- actual/);
    expect(errOut, "to match", /\+ expected/);
  });

  it("should stringify Object.create(null)", function () {
    var err = new Error("test");

    err.actual = Object.create(null);
    err.actual.hasOwnProperty = 1;
    err.expected = Object.create(null);
    err.expected.hasOwnProperty = 2;
    err.showDiff = true;
    var test = makeTest(err);

    list([test]);

    var errOut = stdout.join("\n");
    expect(errOut, "to match", /"hasOwnProperty"/);
    expect(errOut, "to match", /test/);
    expect(errOut, "to match", /- actual/);
    expect(errOut, "to match", /\+ expected/);
  });

  it("should handle error messages that are not strings", function () {
    try {
      assert(false, true);
    } catch (err) {
      err.actual = false;
      err.expected = true;
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /\+true/);
      expect(errOut, "to match", /-false/);
      expect(errOut, "to match", /- actual/);
      expect(errOut, "to match", /\+ expected/);
    }
  });

  it("should interpret 'chai' module custom error messages", function () {
    var actual = 43;
    var expected = 42;

    try {
      chaiExpect(actual, "custom error message").to.equal(expected);
    } catch (err) {
      err.actual = actual;
      err.expected = expected;
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /custom error message\n/)
        .and("to match", /\+42/)
        .and("to match", /-43/)
        .and("to match", /- actual/)
        .and("to match", /\+ expected/);
    }
  });

  it("should interpret 'assert' module custom error messages", function () {
    var actual = 43;
    var expected = 42;

    try {
      assert.strictEqual(actual, expected, "custom error message");
      // AssertionError: custom error message: expected 43 to equal 42.
      // assert.equal(43, 42, 'custom error message: expected 43 to equal 42.');
    } catch (err) {
      err.actual = actual;
      err.expected = expected;
      err.showDiff = true;
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n");
      expect(errOut, "to match", /custom error message\n/);
      expect(errOut, "to match", /\+42/);
      expect(errOut, "to match", /-43/);
      expect(errOut, "to match", /- actual/);
      expect(errOut, "to match", /\+ expected/);
    }
  });

  it("should remove message from stack", function () {
    var err = {
      message: "Error",
      stack: "Error\nfoo\nbar",
      showDiff: false,
    };
    var test = makeTest(err);

    list([test]);

    var errOut = stdout.join("\n").trim();
    expect(errOut, "to be", "1) test title:\n     Error\n  foo\n  bar");
  });

  it("should use 'inspect' if 'inspect' and 'message' are set", function () {
    var err = new Error("test");
    err.showDiff = false;
    err.message = "error message";
    err.inspect = function () {
      return "Inspect Error";
    };

    var test = makeTest(err);

    list([test]);

    var errOut = stdout.join("\n").trim();

    expect(errOut, "to contain", "Inspect Error");
  });

  it("should set an empty message if neither 'inspect' nor 'message' is set", function () {
    var err = {
      showDiff: false,
    };
    var test = makeTest(err);

    list([test]);

    var errOut = stdout.join("\n").trim();
    expect(errOut, "to be", "1) test title:");
  });

  it("should not modify stack if it does not contain message", function () {
    var err = {
      message: "Error",
      stack: "foo\nbar",
      showDiff: false,
    };
    var test = makeTest(err);

    list([test]);

    var errOut = stdout.join("\n").trim();
    expect(errOut, "to be", "1) test title:\n     Error\n  foo\n  bar");
  });

  describe("error causes", function () {
    it("should append any error cause trail to stack traces", function () {
      var err = {
        message: "Error",
        stack: "Error\nfoo\nbar",
        showDiff: false,
        cause: {
          message: "Cause1",
          stack: "Cause1\nbar\nfoo",
          showDiff: false,
          cause: {
            message: "Cause2",
            stack: "Cause2\nabc\nxyz",
            showDiff: false,
          },
        },
      };
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n").trim();
      expect(
        errOut,
        "to be",
        "1) test title:\n     Error\n  foo\n  bar\n     Caused by: Cause1\n  bar\n  foo\n     Caused by: Cause2\n  abc\n  xyz",
      );
    });

    it("should not get stuck in a hypothetical circular error cause trail", function () {
      var err1 = {
        message: "Error",
        stack: "Error\nfoo\nbar",
        showDiff: false,
      };
      var err2 = {
        message: "Cause1",
        stack: "Cause1\nbar\nfoo",
        showDiff: false,
        cause: err1,
      };
      err1.cause = err2;

      var test = makeTest(err1);

      list([test]);

      var errOut = stdout.join("\n").trim();
      expect(
        errOut,
        "to be",
        "1) test title:\n     Error\n  foo\n  bar\n     Caused by: Cause1\n  bar\n  foo\n     Caused by: <circular>",
      );
    });

    it("should set an empty cause if neither 'inspect' nor 'message' is set", function () {
      var err = {
        message: "Error",
        stack: "Error\nfoo\nbar",
        showDiff: false,
        cause: {
          showDiff: false,
        },
      };

      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n").trim();
      expect(
        errOut,
        "to be",
        "1) test title:\n     Error\n  foo\n  bar\n     Caused by:",
      );
    });

    it("should not add cause trail if error does not contain message", function () {
      var err = {
        message: "Error",
        stack: "foo\nbar",
        showDiff: false,
        cause: {
          message: "Cause1",
          stack: "Cause1\nbar\nfoo",
          showDiff: false,
          cause: {
            message: "Cause2",
            stack: "Cause2\nabc\nxyz",
            showDiff: false,
          },
        },
      };
      var test = makeTest(err);

      list([test]);

      var errOut = stdout.join("\n").trim();
      expect(errOut, "to be", "1) test title:\n     Error\n  foo\n  bar");
    });
  });

  it("should list multiple Errors per test", function () {
    var err = new Error("First Error");
    err.multiple = [new Error("Second Error - same test")];
    var test = makeTest(err);

    list([test, test]);

    var errOut = stdout.join("\n").trim();
    expect(
      errOut,
      "to contain",
      "Error: First Error",
      "Error: Second Error - same test",
    );
  });

  describe("when reporter output immune to user test changes", function () {
    var baseConsoleLog;

    beforeEach(function () {
      sinon.restore();
      sinon.stub(console, "log");
      baseConsoleLog = sinon.stub(Base, "consoleLog");
    });

    it("should let you stub out console.log without effecting reporters output", function () {
      Base.list([]);
      baseConsoleLog.restore();

      expect(baseConsoleLog, "was called");
      expect(console.log, "was not called");
    });
  });
});
