using System;
using UnitTestSharp;

namespace Glass.UnitTests
{
    public class FileNamePatternTests : TestFixture
    {
        public class CtorTests : TestFixture
        {
            public void Always_KeepsTheTextWithoutItsEdgeSpaces()
            {
                CheckEqual("*.sav", new FileNamePattern("  *.sav ").Text);
            }

            public void SeveralNames_AreKeptWhole()
            {
                CheckEqual("*.sav; *.txt", new FileNamePattern("*.sav; *.txt").Text);
            }

            public void NullText_Throws()
            {
                CheckThrow(typeof(ArgumentNullException));
                new FileNamePattern(null);
            }

            public void EmptyText_Throws()
            {
                CheckThrow(typeof(ArgumentException));
                new FileNamePattern(string.Empty);
            }

            public void OnlySemicolonsAndSpaces_Throws()
            {
                CheckThrow(typeof(ArgumentException));
                new FileNamePattern(" ; ;");
            }
        }

        public class HasWildcardTests : TestFixture
        {
            public void AStar_IsOne()
            {
                CheckTrue(FileNamePattern.HasWildcard("a*"));
            }

            public void AQuestionMark_IsOne()
            {
                CheckTrue(FileNamePattern.HasWildcard("a?b"));
            }

            public void PlainText_IsNot()
            {
                CheckFalse(FileNamePattern.HasWildcard("notes.txt"));
            }

            public void EmptyText_IsNot()
            {
                CheckFalse(FileNamePattern.HasWildcard(string.Empty));
            }
        }

        public class FitsTests : TestFixture
        {
            public void AStarLeadingAnExtension_FitsEveryNameWithIt()
            {
                CheckTrue(FileNamePattern.Fits("*.sav", "game.sav"));
                CheckTrue(FileNamePattern.Fits("*.sav", ".sav"));
                CheckFalse(FileNamePattern.Fits("*.sav", "game.txt"));
                CheckFalse(FileNamePattern.Fits("*.sav", "sav"));
            }

            public void AQuestionMark_FitsExactlyOneCharacter()
            {
                CheckTrue(FileNamePattern.Fits("slot?.sav", "slot1.sav"));
                CheckFalse(FileNamePattern.Fits("slot?.sav", "slot.sav"));
                CheckFalse(FileNamePattern.Fits("slot?.sav", "slot12.sav"));
            }

            public void Case_IsIgnored()
            {
                CheckTrue(FileNamePattern.Fits("*.SAV", "game.sav"));
                CheckTrue(FileNamePattern.Fits("game.*", "GAME.txt"));
            }

            public void ANameWithNoWildcard_FitsOnlyItself()
            {
                CheckTrue(FileNamePattern.Fits("notes.txt", "Notes.TXT"));
                CheckFalse(FileNamePattern.Fits("notes.txt", "notes.txt2"));
                CheckFalse(FileNamePattern.Fits("notes.txt", "my notes.txt"));
            }

            public void StarDotStar_FitsANameWithNoDot()
            {
                CheckTrue(FileNamePattern.Fits("*.*", "README"));
            }

            public void AStarInTheMiddle_FitsNothingToAnyRun()
            {
                CheckTrue(FileNamePattern.Fits("a*c", "ac"));
                CheckTrue(FileNamePattern.Fits("a*c", "abbbc"));
                CheckFalse(FileNamePattern.Fits("a*c", "abbb"));
            }

            public void AStarThatMustGiveBackCharacters_StillFits()
            {
                CheckTrue(FileNamePattern.Fits("a*ab", "aaab"));
            }

            public void StarsInARow_ActAsOne()
            {
                CheckTrue(FileNamePattern.Fits("a**b", "axxb"));
                CheckTrue(FileNamePattern.Fits("ab**", "ab"));
            }

            public void ALoneStar_FitsTheEmptyName()
            {
                CheckTrue(FileNamePattern.Fits("*", string.Empty));
            }

            public void ALoneQuestionMark_DoesNotFitTheEmptyName()
            {
                CheckFalse(FileNamePattern.Fits("?", string.Empty));
            }

            public void ANameShorterThanThePattern_DoesNotFit()
            {
                CheckFalse(FileNamePattern.Fits("abc", "ab"));
            }

            public void ANameLongerThanThePattern_DoesNotFit()
            {
                CheckFalse(FileNamePattern.Fits("ab", "abc"));
            }
        }

        public class MatchesTests : TestFixture
        {
            public void AnyOfSeveralNames_Fits()
            {
                var pattern = new FileNamePattern("*.sav; notes.txt");

                CheckTrue(pattern.Matches("slot.sav"));
                CheckTrue(pattern.Matches("notes.txt"));
                CheckFalse(pattern.Matches("other.txt"));
            }

            public void BlankNamesBetweenSemicolons_AreLeftOut()
            {
                var pattern = new FileNamePattern(";*.sav;;");

                CheckTrue(pattern.Matches("slot.sav"));
                CheckFalse(pattern.Matches(string.Empty));
            }
        }
    }
}