using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Dinah.Core;
using FluentAssertions;
using LibationFileManager;
using Microsoft.VisualStudio.TestTools.UnitTesting;

using static TemplatesTests.Shared;

namespace TemplatesTests
{
	public static class Shared
	{
		public static LibraryBookDto GetLibraryBook(string asin, string seriesName = "Sherlock Holmes")
			=> new()
			{
				Account = "my account",
				AudibleProductId = asin,
				Title = "A Study in Scarlet: A Sherlock Holmes Novel",
				Locale = "us",
				Authors = new List<string> { "Arthur Conan Doyle", "Stephen Fry - introductions" },
				Narrators = new List<string> { "Stephen Fry" },
				SeriesName = seriesName ?? "",
				SeriesNumber = "1"
			};
	}

	[TestClass]
	public class ContainsChapterOnlyTags
	{
		[TestMethod]
		[DataRow("<ch>", false)]
		[DataRow("<ch#>", true)]
		[DataRow("<id>", false)]
		[DataRow("<id><ch#>", true)]
		public void Tests(string template, bool expected) => Templates.ContainsChapterOnlyTags(template).Should().Be(expected);
	}

	[TestClass]
	public class ContainsTag
	{
		[TestMethod]
		[DataRow("<ch#>", "ch#", true)]
		[DataRow("<id>", "ch#", false)]
		[DataRow("<id><ch#>", "ch#", true)]
		public void Tests(string template, string tag, bool expected) => Templates.ContainsTag(template, tag).Should().Be(expected);
	}

	[TestClass]
	public class getFileNamingTemplate
	{
		[TestMethod]
		[DataRow(null, "asin", @"C:\", "ext")]
		[ExpectedException(typeof(ArgumentNullException))]
		public void arg_null_exception(string template, string asin, string dirFullPath, string extension)
			=> Templates.getFileNamingTemplate(GetLibraryBook(asin), template, dirFullPath, extension);

		[TestMethod]
		[DataRow("", "asin", @"C:\foo\bar", "ext")]
		[DataRow("   ", "asin", @"C:\foo\bar", "ext")]
		[ExpectedException(typeof(ArgumentException))]
		public void arg_exception(string template, string asin, string dirFullPath, string extension)
			=> Templates.getFileNamingTemplate(GetLibraryBook(asin), template, dirFullPath, extension);

		[TestMethod]
		public void null_extension() => Tests("f.txt", "asin", @"C:\foo\bar", null, @"C:\foo\bar\f.txt");

		[TestMethod]
		[DataRow("f.txt", "asin", @"C:\foo\bar", "ext", @"C:\foo\bar\f.txt.ext")]
		[DataRow("f", "asin", @"C:\foo\bar", "ext", @"C:\foo\bar\f.ext")]
		[DataRow("<id>", "asin", @"C:\foo\bar", "ext", @"C:\foo\bar\asin.ext")]
		public void Tests(string template, string asin, string dirFullPath, string extension, string expected)
			=> Templates.getFileNamingTemplate(GetLibraryBook(asin), template, dirFullPath, extension)
			.GetFilePath()
			.Should().Be(expected);

		[TestMethod]
		public void IfSeries_empty()
			=> Templates.getFileNamingTemplate(GetLibraryBook("asin", "Sherlock Holmes"), "foo<if series-><-if series>bar", @"C:\a\b", "ext")
			.GetFilePath()
			.Should().Be(@"C:\a\b\foobar.ext");

		[TestMethod]
		public void IfSeries_no_series()
			=> Templates.getFileNamingTemplate(GetLibraryBook("asin", ""), "foo<if series->-<series>-<id>-<-if series>bar", @"C:\a\b", "ext")
			.GetFilePath()
			.Should().Be(@"C:\a\b\foobar.ext");

		[TestMethod]
		public void IfSeries_with_series()
			=> Templates.getFileNamingTemplate(GetLibraryBook("asin", "Sherlock Holmes"), "foo<if series->-<series>-<id>-<-if series>bar", @"C:\a\b", "ext")
			.GetFilePath()
			.Should().Be(@"C:\a\b\foo-Sherlock Holmes-asin-bar.ext");
	}
}

namespace Templates_Folder_Tests
{
	[TestClass]
	public class GetErrors
	{
		[TestMethod]
		public void null_is_invalid() => Tests(null, new[] { Templates.ERROR_NULL_IS_INVALID });

		[TestMethod]
		public void empty_is_valid() => valid_tests("");

		[TestMethod]
		public void whitespace_is_valid() => valid_tests("   ");

		[TestMethod]
		[DataRow(@"foo")]
		[DataRow(@"\foo")]
		[DataRow(@"foo\")]
		[DataRow(@"\foo\")]
		[DataRow(@"foo\bar")]
		[DataRow(@"<id>")]
		[DataRow(@"<id>\<title>")]
		public void valid_tests(string template) => Tests(template, Array.Empty<string>());

		[TestMethod]
		[DataRow(@"C:\", Templates.ERROR_FULL_PATH_IS_INVALID)]
		public void Tests(string template, params string[] expected)
		{
			var result = Templates.Folder.GetErrors(template);
			result.Count().Should().Be(expected.Length);
			result.Should().BeEquivalentTo(expected);
		}
	}

	[TestClass]
	public class IsValid
	{
		[TestMethod]
		public void null_is_invalid() => Tests(null, false);

		[TestMethod]
		public void empty_is_valid() => Tests("", true);

		[TestMethod]
		public void whitespace_is_valid() => Tests("   ", true);

		[TestMethod]
		[DataRow(@"C:\", false)]
		[DataRow(@"foo", true)]
		[DataRow(@"\foo", true)]
		[DataRow(@"foo\", true)]
		[DataRow(@"\foo\", true)]
		[DataRow(@"foo\bar", true)]
		[DataRow(@"<id>", true)]
		[DataRow(@"<id>\<title>", true)]
		public void Tests(string template, bool expected) => Templates.Folder.IsValid(template).Should().Be(expected);
	}

	[TestClass]
	public class GetWarnings
	{
		[TestMethod]
		public void null_is_invalid() => Tests(null, new[] { Templates.ERROR_NULL_IS_INVALID });

		[TestMethod]
		public void empty_has_warnings() => Tests("", Templates.WARNING_EMPTY, Templates.WARNING_NO_TAGS);

		[TestMethod]
		public void whitespace_has_warnings() => Tests("   ", Templates.WARNING_WHITE_SPACE, Templates.WARNING_NO_TAGS);

		[TestMethod]
		[DataRow(@"<id>\foo\bar")]
		public void valid_tests(string template) => Tests(template, Array.Empty<string>());

		[TestMethod]
		[DataRow(@"no tags", Templates.WARNING_NO_TAGS)]
		[DataRow("<ch#> <id>", Templates.WARNING_HAS_CHAPTER_TAGS)]
		[DataRow("<ch#> chapter tag", Templates.WARNING_NO_TAGS, Templates.WARNING_HAS_CHAPTER_TAGS)]
		public void Tests(string template, params string[] expected)
		{
			var result = Templates.Folder.GetWarnings(template);
			result.Count().Should().Be(expected.Length);
			result.Should().BeEquivalentTo(expected);
		}
	}

	[TestClass]
	public class HasWarnings
	{
		[TestMethod]
		public void null_has_warnings() => Tests(null, true);

		[TestMethod]
		public void empty_has_warnings() => Tests("", true);

		[TestMethod]
		public void whitespace_has_warnings() => Tests("   ", true);

		[TestMethod]
		[DataRow(@"no tags", true)]
		[DataRow(@"<id>\foo\bar", false)]
		[DataRow("<ch#> <id>", true)]
		[DataRow("<ch#> chapter tag", true)]
		public void Tests(string template, bool expected) => Templates.Folder.HasWarnings(template).Should().Be(expected);
	}

	[TestClass]
	public class TagCount
	{
		[TestMethod]
		public void null_throws() => Assert.ThrowsException<NullReferenceException>(() => Templates.Folder.TagCount(null));

		[TestMethod]
		public void empty() => Tests("", 0);

		[TestMethod]
		public void whitespace() => Tests("   ", 0);

		[TestMethod]
		[DataRow("no tags", 0)]
		[DataRow(@"<id>\foo\bar", 1)]
		[DataRow("<id> <id>", 2)]
		[DataRow("<id <id> >", 1)]
		[DataRow("<id> <title>", 2)]
		[DataRow("id> <title incomplete tags", 0)]
		[DataRow("<not a real tag>", 0)]
		[DataRow("<ch#> non-folder tag", 0)]
		[DataRow("<ID> case specific", 0)]
		public void Tests(string template, int expected) => Templates.Folder.TagCount(template).Should().Be(expected);
	}
}

namespace Templates_File_Tests
{
	[TestClass]
	public class GetErrors
	{
		[TestMethod]
		public void null_is_invalid() => Tests(null, new[] { Templates.ERROR_NULL_IS_INVALID });

		[TestMethod]
		public void empty_is_valid() => valid_tests("");

		[TestMethod]
		public void whitespace_is_valid() => valid_tests("   ");

		[TestMethod]
		[DataRow(@"foo")]
		[DataRow(@"<id>")]
		public void valid_tests(string template) => Tests(template, Array.Empty<string>());


		[TestMethod]
		[DataRow(@"C:\", Templates.ERROR_INVALID_FILE_NAME_CHAR)]
		[DataRow(@"\foo", Templates.ERROR_INVALID_FILE_NAME_CHAR)]
		[DataRow(@"/foo", Templates.ERROR_INVALID_FILE_NAME_CHAR)]
		[DataRow(@"C:\", Templates.ERROR_INVALID_FILE_NAME_CHAR)]
		public void Tests(string template, params string[] expected)
		{
			var result = Templates.File.GetErrors(template);
			result.Count().Should().Be(expected.Length);
			result.Should().BeEquivalentTo(expected);
		}
	}

	[TestClass]
	public class IsValid
	{
		[TestMethod]
		public void null_is_invalid() => Tests(null, false);

		[TestMethod]
		public void empty_is_valid() => Tests("", true);

		[TestMethod]
		public void whitespace_is_valid() => Tests("   ", true);

		[TestMethod]
		[DataRow(@"C:\", false)]
		[DataRow(@"foo", true)]
		[DataRow(@"\foo", false)]
		[DataRow(@"/foo", false)]
		[DataRow(@"<id>", true)]
		public void Tests(string template, bool expected) => Templates.File.IsValid(template).Should().Be(expected);
	}

	// same as Templates.Folder.GetWarnings
	//[TestClass]
	//public class GetWarnings { }

	// same as Templates.Folder.HasWarnings 
	//[TestClass]
	//public class HasWarnings { }

	// same as Templates.Folder.TagCount 
	//[TestClass]
	//public class TagCount { }
}

namespace Templates_ChapterFile_Tests
{
	// same as Templates.File.GetErrors
	//[TestClass]
	//public class GetErrors { }

	// same as Templates.File.IsValid
	//[TestClass]
	//public class IsValid { }

	[TestClass]
	public class GetWarnings
	{
		[TestMethod]
		public void null_is_invalid() => Tests(null, new[] { Templates.ERROR_NULL_IS_INVALID });

		[TestMethod]
		public void empty_has_warnings() => Tests("", Templates.WARNING_EMPTY, Templates.WARNING_NO_TAGS, Templates.WARNING_NO_CHAPTER_NUMBER_TAG);

		[TestMethod]
		public void whitespace_has_warnings() => Tests("   ", Templates.WARNING_WHITE_SPACE, Templates.WARNING_NO_TAGS, Templates.WARNING_NO_CHAPTER_NUMBER_TAG);

		[TestMethod]
		[DataRow("<ch#>")]
		[DataRow("<ch#> <id>")]
		public void valid_tests(string template) => Tests(template, Array.Empty<string>());

		[TestMethod]
		[DataRow(@"no tags", Templates.WARNING_NO_TAGS, Templates.WARNING_NO_CHAPTER_NUMBER_TAG)]
		[DataRow(@"<id>\foo\bar", Templates.ERROR_INVALID_FILE_NAME_CHAR, Templates.WARNING_NO_CHAPTER_NUMBER_TAG)]
		[DataRow("<chapter count> -- chapter tag but not ch# or ch_#", Templates.WARNING_NO_TAGS, Templates.WARNING_NO_CHAPTER_NUMBER_TAG)]
		public void Tests(string template, params string[] expected)
		{
			var result = Templates.ChapterFile.GetWarnings(template);
			result.Count().Should().Be(expected.Length);
			result.Should().BeEquivalentTo(expected);
		}
	}

	[TestClass]
	public class HasWarnings
	{
		[TestMethod]
		public void null_has_warnings() => Tests(null, true);

		[TestMethod]
		public void empty_has_warnings() => Tests("", true);

		[TestMethod]
		public void whitespace_has_warnings() => Tests("   ", true);

		[TestMethod]
		[DataRow(@"no tags", true)]
		[DataRow(@"<id>\foo\bar", true)]
		[DataRow("<ch#> <id>", false)]
		[DataRow("<ch#> -- chapter tag", false)]
		[DataRow("<chapter count> -- chapter tag but not ch# or ch_#", true)]
		public void Tests(string template, bool expected) => Templates.ChapterFile.HasWarnings(template).Should().Be(expected);
	}

	[TestClass]
	public class TagCount
	{
		[TestMethod]
		public void null_is_not_recommended() => Assert.ThrowsException<NullReferenceException>(() => Tests(null, -1));

		[TestMethod]
		public void empty_is_not_recommended() => Tests("", 0);

		[TestMethod]
		public void whitespace_is_not_recommended() => Tests("   ", 0);

		[TestMethod]
		[DataRow("no tags", 0)]
		[DataRow(@"<id>\foo\bar", 1)]
		[DataRow("<id> <id>", 2)]
		[DataRow("<id <id> >", 1)]
		[DataRow("<id> <title>", 2)]
		[DataRow("id> <title incomplete tags", 0)]
		[DataRow("<not a real tag>", 0)]
		[DataRow("<ch#> non-folder tag", 1)]
		[DataRow("<ID> case specific", 0)]
		public void Tests(string template, int expected) => Templates.ChapterFile.TagCount(template).Should().Be(expected);
	}

	[TestClass]
	public class GetPortionFilename
	{
		[TestMethod]
		[DataRow("asin", "[<id>] <ch# 0> of <ch count> - <ch title>", @"C:\foo\", "txt", 6, 10, "chap", @"C:\foo\[asin] 06 of 10 - chap.txt")]
		[DataRow("asin", "<ch#>", @"C:\foo\", "txt", 6, 10, "chap", @"C:\foo\6.txt")]
		public void Tests(string asin, string template, string dir, string ext, int pos, int total, string chapter, string expected)
			=> Templates.ChapterFile.GetPortionFilename(GetLibraryBook(asin), template, new() { OutputFileName = $"xyz.{ext}", PartsPosition = pos, PartsTotal = total, Title = chapter }, dir)
			.Should().Be(expected);
	}
}
