// Copyright (c) Umbraco.
// See LICENSE for more details.

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using NUnit.Framework;
using Umbraco.Cms.Core.Strings;
using Umbraco.Extensions;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core.ShortStringHelper;

[TestFixture]
public class StringExtensionsTests
{
    private readonly IShortStringHelper _mockShortStringHelper = new MockShortStringHelper();

    [TestCase("hello-world.png", "Hello World")]
    [TestCase("hello-world .png", "Hello World")]
    [TestCase("_hello-world __1.png", "Hello World 1")]
    public void To_Friendly_Name(string first, string second) => Assert.AreEqual(first.ToFriendlyName(), second);

    [TestCase("hello", "world", false)]
    [TestCase("hello", "hello", true)]
    [TestCase("hellohellohellohellohellohellohello", "hellohellohellohellohellohellohelloo", false)]
    [TestCase(
        "hellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohello",
        "hellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohelloo",
        false)]
    [TestCase(
        "hellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohello",
        "hellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohello",
        true)]
    public void String_To_Guid(string first, string second, bool result)
    {
        Debug.Print("First: " + first.ToGuid());
        Debug.Print("Second: " + second.ToGuid());
        Assert.AreEqual(result, first.ToGuid() == second.ToGuid());
    }

    [TestCase("hello.txt", "hello")]
    [TestCase("this.is.a.Txt", "this.is.a")]
    [TestCase("this.is.not.a. Txt", "this.is.not.a. Txt")]
    [TestCase("not a file", "not a file")]
    public void Strip_File_Extension(string input, string result)
    {
        var stripped = input.StripFileExtension();
        Assert.AreEqual(stripped, result);
    }

    [TestCase("../wtf.js?x=wtf", ".js")]
    [TestCase(".htaccess", ".htaccess")]
    [TestCase("path/to/file/image.png", ".png")]
    [TestCase("c:\\abc\\def\\ghi.jkl", ".jkl")]
    [TestCase("/root/folder.name/file.ext", ".ext")]
    [TestCase("http://www.domain.com/folder/name/file.txt", ".txt")]
    [TestCase("i/don't\\have\\an/extension", "")]
    [TestCase("https://some.where/path/to/file.ext?query=this&more=that", ".ext")]
    [TestCase("double_query.string/file.ext?query=abc?something.else", ".ext")]
    [TestCase("test.tar.gz", ".gz")]
    [TestCase("wierd.file,but._legal", "._legal")]
    [TestCase("one_char.x", ".x")]
    public void Get_File_Extension(string input, string result)
    {
        var extension = input.GetFileExtension();
        Assert.AreEqual(result, extension);
    }

    [TestCase("'+alert(1234)+'", "+alert1234+")]
    [TestCase("'+alert(56+78)+'", "+alert56+78+")]
    [TestCase("{{file}}", "file")]
    [TestCase("'+alert('hello')+'", "+alerthello+")]
    [TestCase("Test", "Test")]
    public void Clean_From_XSS(string input, string result)
    {
        var cleaned = input.CleanForXss();
        Assert.AreEqual(cleaned, result);
    }

    [TestCase("Hello this is my string", " string", "Hello this is my")]
    [TestCase("Hello this is my string strung", " string", "Hello this is my string strung")]
    [TestCase("Hello this is my string string", " string", "Hello this is my")]
    [TestCase("Hello this is my string string", "g", "Hello this is my string strin")]
    [TestCase("Hello this is my string string", "ello this is my string string", "H")]
    [TestCase("Hello this is my string string", "Hello this is my string string", "")]
    public void TrimEnd(string input, string forTrimming, string shouldBe)
    {
        var trimmed = input.TrimEnd(forTrimming);
        Assert.AreEqual(shouldBe, trimmed);
    }

    [TestCase("Hello this is my string", "hello", " this is my string")]
    [TestCase("Hello this is my string", "Hello this", " is my string")]
    [TestCase("Hello this is my string", "Hello this is my ", "string")]
    [TestCase("Hello this is my string", "Hello this is my string", "")]
    public void TrimStart(string input, string forTrimming, string shouldBe)
    {
        var trimmed = input.TrimStart(forTrimming);
        Assert.AreEqual(shouldBe, trimmed);
    }

    [TestCase(
        "Hello this is my string",
        "hello",
        "replaced",
        "replaced this is my string",
        StringComparison.CurrentCultureIgnoreCase)]
    [TestCase(
        "Hello this is hello my string",
        "hello",
        "replaced",
        "replaced this is replaced my string",
        StringComparison.CurrentCultureIgnoreCase)]
    [TestCase(
        "Hello this is my string",
        "nonexistent",
        "replaced",
        "Hello this is my string",
        StringComparison.CurrentCultureIgnoreCase)]
    [TestCase(
        "Hellohello this is my string",
        "hello",
        "replaced",
        "replacedreplaced this is my string",
        StringComparison.CurrentCultureIgnoreCase)]

    // Ensure replacing with the same string doesn't cause infinite loop.
    [TestCase(
        "Hello this is my string",
        "hello",
        "hello",
        "hello this is my string",
        StringComparison.CurrentCultureIgnoreCase)]
    public void ReplaceWithStringComparison(
        string input,
        string oldString,
        string newString,
        string shouldBe,
        StringComparison stringComparison)
    {
        var replaced = input.Replace(oldString, newString, stringComparison);
        Assert.AreEqual(shouldBe, replaced);
    }

    [TestCase(null, null)]
    [TestCase("", "")]
    [TestCase("x", "X")]
    [TestCase("xyzT", "XyzT")]
    [TestCase("XyzT", "XyzT")]
    public void ToFirstUpper(string input, string expected)
    {
        var output = input.ToFirstUpper();
        Assert.AreEqual(expected, output);
    }

    [TestCase(null, null)]
    [TestCase("", "")]
    [TestCase("X", "x")]
    [TestCase("XyZ", "xyZ")]
    [TestCase("xyZ", "xyZ")]
    public void ToFirstLower(string input, string expected)
    {
        var output = input.ToFirstLower();
        Assert.AreEqual(expected, output);
    }

    [TestCase("pineapple", new[] { "banana", "apple", "blueberry", "strawberry" }, StringComparison.CurrentCulture, true)]
    [TestCase("PINEAPPLE", new[] { "banana", "apple", "blueberry", "strawberry" }, StringComparison.CurrentCulture, false)]
    [TestCase("pineapple", new[] { "banana", "Apple", "blueberry", "strawberry" }, StringComparison.CurrentCulture, false)]
    [TestCase("pineapple", new[] { "banana", "Apple", "blueberry", "strawberry" }, StringComparison.OrdinalIgnoreCase, true)]
    [TestCase("pineapple", new[] { "banana", "blueberry", "strawberry" }, StringComparison.OrdinalIgnoreCase, false)]
    [TestCase("Strawberry unicorn pie", new[] { "Berry" }, StringComparison.OrdinalIgnoreCase, true)]
    [TestCase("empty pie", new string[0], StringComparison.OrdinalIgnoreCase, false)]
    public void ContainsAny(string haystack, IEnumerable<string> needles, StringComparison comparison, bool expected)
    {
        var output = haystack.ContainsAny(needles, comparison);
        Assert.AreEqual(expected, output);
    }

    [TestCase("", true)]
    [TestCase(" ", true)]
    [TestCase("\r\n\r\n", true)]
    [TestCase("\r\n", true)]
    [TestCase(
        @"
        Hello
        ",
        false)]
    [TestCase(null, true)]
    [TestCase("a", false)]
    [TestCase("abc", false)]
    [TestCase("abc   ", false)]
    [TestCase("   abc", false)]
    [TestCase("   abc   ", false)]
    public void IsNullOrWhiteSpace(string value, bool expected)
    {
        // Act
        var result = value.IsNullOrWhiteSpace();

        // Assert
        Assert.AreEqual(expected, result);
    }

    [TestCase("hello", "aGVsbG8")]
    [TestCase("tad", "dGFk")]
    [TestCase("AmqGr+Fd!~ééé", "QW1xR3IrRmQhfsOpw6nDqQ")]
    public void UrlTokenEncoding(string value, string expected)
    {
        var bytes = Encoding.UTF8.GetBytes(value);
        Console.WriteLine("base64: " + Convert.ToBase64String(bytes));
        var encoded = bytes.UrlTokenEncode();
        Assert.AreEqual(expected, encoded);

        var backBytes = encoded.UrlTokenDecode();
        var backString = Encoding.UTF8.GetString(backBytes);
        Assert.AreEqual(value, backString);
    }

    // FORMAT STRINGS

    // note: here we just ensure that the proper helper gets called properly
    // but the "legacy" tests have moved to the legacy helper tests
    [Test]
    public void ToUrlAlias()
    {
        var output = "JUST-ANYTHING".ToUrlSegment(_mockShortStringHelper);
        Assert.AreEqual("URL-SEGMENT::JUST-ANYTHING", output);
    }

    [Test]
    public void FormatUrl()
    {
        var output = "JUST-ANYTHING".ToUrlSegment(_mockShortStringHelper);
        Assert.AreEqual("URL-SEGMENT::JUST-ANYTHING", output);
    }

    [Test]
    public void ToUmbracoAlias()
    {
        var output = "JUST-ANYTHING".ToSafeAlias(_mockShortStringHelper);
        Assert.AreEqual("SAFE-ALIAS::JUST-ANYTHING", output);
    }

    [Test]
    public void ToSafeAlias()
    {
        var output = "JUST-ANYTHING".ToSafeAlias(_mockShortStringHelper);
        Assert.AreEqual("SAFE-ALIAS::JUST-ANYTHING", output);
    }

    [Test]
    public void ToSafeAliasWithCulture()
    {
        var output = "JUST-ANYTHING".ToSafeAlias(_mockShortStringHelper, null);
        Assert.AreEqual("SAFE-ALIAS-CULTURE::JUST-ANYTHING", output);
    }

    [Test]
    public void ToUrlSegment()
    {
        var output = "JUST-ANYTHING".ToUrlSegment(_mockShortStringHelper);
        Assert.AreEqual("URL-SEGMENT::JUST-ANYTHING", output);
    }

    [Test]
    public void ToUrlSegmentWithCulture()
    {
        var output = "JUST-ANYTHING".ToUrlSegment(_mockShortStringHelper, null);
        Assert.AreEqual("URL-SEGMENT-CULTURE::JUST-ANYTHING", output);
    }

    [Test]
    public void ToSafeFileName()
    {
        var output = "JUST-ANYTHING".ToSafeFileName(_mockShortStringHelper);
        Assert.AreEqual("SAFE-FILE-NAME::JUST-ANYTHING", output);
    }

    [Test]
    public void ToSafeFileNameWithCulture()
    {
        var output = "JUST-ANYTHING".ToSafeFileName(_mockShortStringHelper, null);
        Assert.AreEqual("SAFE-FILE-NAME-CULTURE::JUST-ANYTHING", output);
    }

    [Test]
    public void ConvertCase()
    {
        var output = "JUST-ANYTHING".ToCleanString(_mockShortStringHelper, CleanStringType.Unchanged);
        Assert.AreEqual("CLEAN-STRING-A::JUST-ANYTHING", output);
    }

    [Test]
    public void SplitPascalCasing()
    {
        var output = "JUST-ANYTHING".SplitPascalCasing(_mockShortStringHelper);
        Assert.AreEqual("SPLIT-PASCAL-CASING::JUST-ANYTHING", output);
    }

    [Test] // can't do cases with an IDictionary
    public void ReplaceManyWithCharMap()
    {
        const string input = "télévisiön tzvâr ßup &nbsp; pof";
        const string expected = "television tzvar ssup   pof";
        IDictionary<string, string> replacements = new Dictionary<string, string>
        {
            { "é", "e" },
            { "ö", "o" },
            { "â", "a" },
            { "ß", "ss" },
            { "&nbsp;", " " },
        };
        var output = input.ReplaceMany(replacements);
        Assert.AreEqual(expected, output);
    }

    [TestCase("val$id!ate|this|str'ing", "$!'", '-', "val-id-ate|this|str-ing")]
    [TestCase("val$id!ate|this|str'ing", "$!'", '*', "val*id*ate|this|str*ing")]
    public void ReplaceManyByOneChar(string input, string toReplace, char replacement, string expected)
    {
        var output = input.ReplaceMany(toReplace.ToArray(), replacement);
        Assert.AreEqual(expected, output);
    }

    [Test]
    public void IsFullPath()
    {
        bool isWindows = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Windows);

        // These are full paths on Windows, but not on Linux
        TryIsFullPath(@"C:\dir\file.ext", isWindows);
        TryIsFullPath(@"C:\dir\", isWindows);
        TryIsFullPath(@"C:\dir", isWindows);
        TryIsFullPath(@"C:\", isWindows);
        TryIsFullPath(@"\\unc\share\dir\file.ext", isWindows);
        TryIsFullPath(@"\\unc\share", isWindows);

        // These are full paths on Linux, but not on Windows
        TryIsFullPath(@"/some/file", !isWindows);
        TryIsFullPath(@"/dir", !isWindows);
        TryIsFullPath(@"/", !isWindows);

        // Not full paths on either Windows or Linux
        TryIsFullPath(@"file.ext", false);
        TryIsFullPath(@"dir\file.ext", false);
        TryIsFullPath(@"\dir\file.ext", false);
        TryIsFullPath(@"C:", false);
        TryIsFullPath(@"C:dir\file.ext", false);
        TryIsFullPath(@"\dir", false); // An "absolute", but not "full" path

        // Invalid on both Windows and Linux
        TryIsFullPath("", false, false);
        TryIsFullPath("   ", false, false); // technically, a valid filename on Linux
    }

    private static void TryIsFullPath(string path, bool expectedIsFull, bool expectedIsValid = true)
    {
        Assert.AreEqual(expectedIsFull, path.IsFullPath(), "IsFullPath('" + path + "')");

        if (expectedIsFull)
        {
            Assert.AreEqual(path, Path.GetFullPath(path));
        }
        else if (expectedIsValid)
        {
            Assert.AreNotEqual(path, Path.GetFullPath(path));
        }
    }
}