//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.IO;
using System.Data;

namespace Spludlow.Mame
{
	public class MameVerify
	{
		public static string VerifyMachineRom()
		{
			MameHashStores mameHashStores = new MameHashStores();
			return ReportValidateHashStore(mameHashStores.MachineRom, "Verify Machine Rom", 1000);
		}
		public static string VerifyMachineDisk()
		{
			MameHashStores mameHashStores = new MameHashStores();
			return ReportValidateHashStoreDiskVerify(mameHashStores.MachineDisk, "Verify Machine Disk", 10);
		}
		public static string CheckMachineDisk()
		{
			MameHashStores mameHashStores = new MameHashStores();
			return ReportValidateHashStore(mameHashStores.MachineDisk, "Check Machine Disk", 10);
		}

		public static string VerifySoftwareRom()
		{
			MameHashStores mameHashStores = new MameHashStores();
			return ReportValidateHashStore(mameHashStores.SoftwareRom, "Verify Software Rom", 1000);
		}
		public static string VerifySoftwareDisk()
		{
			MameHashStores mameHashStores = new MameHashStores();
			return ReportValidateHashStoreDiskVerify(mameHashStores.SoftwareDisk, "Verify Software Disk", 10);
		}
		public static string CheckSoftwareDisk()
		{
			MameHashStores mameHashStores = new MameHashStores();
			return ReportValidateHashStore(mameHashStores.SoftwareDisk, "Check Software Disk", 10);
		}


		public static string ReportValidateHashStore(HashStore hashStore, string subject, int progressSize)
		{
			DataTable table = ValidateHashStore(hashStore, progressSize);

			MameReport.Report(subject, table);

			DataView view = new DataView(table);
			view.RowFilter = "Problems <> ''";

			return subject + ", total " + hashStore.Length + ", " + (view.Count == 0 ? "All good" : "bad count: " + view.Count);
		}

		private static DataTable ValidateHashStore(HashStore hashStore, int progressSize)
		{
			DataTable table = Spludlow.Data.TextTable.ReadText(new string[] {
				"Filename	Problems",
				"String		String",
			});

			int count = 0;
			foreach (string filename in hashStore.FileNames())
			{
				if (count % progressSize == 0)
					Console.WriteLine(count + " / " + hashStore.Length);
				++count;

				DataRow row = table.Rows.Add(filename, "");
				try
				{
					string storeHash = Path.GetFileNameWithoutExtension(filename);
					string actualHash = hashStore.Hash(filename);

					if (storeHash != actualHash)
						throw new ApplicationException(actualHash);
				}
				catch (Exception ee)
				{
					row["Problems"] = ee.Message;
				}
			}

			return table;
		}

		public static string ReportValidateHashStoreDiskVerify(HashStore hashStore, string subject, int progressSize)
		{
			DataTable table = ValidateHashStoreDiskVerify(hashStore, progressSize);

			MameReport.Report(subject, table);

			DataView view = new DataView(table);
			view.RowFilter = "Problems <> ''";

			return subject + ", total " + hashStore.Length + ", " + (view.Count == 0 ? "All good" : "bad count: " + view.Count);
		}

		private static DataTable ValidateHashStoreDiskVerify(HashStore hashStore, int progressSize)
		{
			MameChdMan chdMan = new MameChdMan();

			DataTable table = Spludlow.Data.TextTable.ReadText(new string[] {
				"Filename	Problems",
				"String		String",
			});

			int count = 0;

			foreach (string filename in hashStore.FileNames())
			{
				if (count % progressSize == 0)
					Console.WriteLine(count + " / " + hashStore.Length);
				++count;

				DataRow row = table.Rows.Add(filename, "");
				try
				{
					string storeHash = Path.GetFileNameWithoutExtension(filename);
					string actualHash = hashStore.Hash(filename);

					if (storeHash != actualHash)
						throw new ApplicationException(actualHash);

					if (chdMan.Verify(filename) == false)
						throw new ApplicationException("CHD Failed Verify");

				}
				catch (Exception ee)
				{
					row["Problems"] = ee.Message;
				}
			}

			return table;
		}
	}
}