using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace BizHawk.Client.Common
{
	public class PathEntry
	{
		public PathEntry() { }

		public string SystemDisplayName;
		public string Type;
		public string Path;
		public string System;
		public int Ordinal;

		public bool HasSystem(string systemID)
		{
			if (systemID == System)
			{
				return true;
			}
			else
			{
				return System.Split('_').Contains(systemID);
			}
		}
	}

	[Newtonsoft.Json.JsonObject]
	public class PathEntryCollection : IEnumerable<PathEntry>
	{
		public List<PathEntry> Paths { get; private set; }

		public PathEntryCollection()
		{
			Paths = new List<PathEntry>();
			Paths.AddRange(DefaultValues);
		}

		[Newtonsoft.Json.JsonConstructor]
		public PathEntryCollection(List<PathEntry> Paths)
		{
			this.Paths = Paths;
		}

		public void Add(PathEntry p)
		{
			Paths.Add(p);
		}

		public IEnumerator<PathEntry> GetEnumerator()
		{
			return Paths.GetEnumerator();
		}

		IEnumerator IEnumerable.GetEnumerator()
		{
			return GetEnumerator();
		}

		public PathEntry this[string system, string type]
		{
			get
			{
				return Paths.FirstOrDefault(x => x.HasSystem(system) && x.Type == type);
			}
		}

		public void ResolveWithDefaults()
		{
			//Add missing entries
			foreach (PathEntry defaultpath in DefaultValues)
			{
				var path = Paths.FirstOrDefault(x => x.System == defaultpath.System && x.Type == defaultpath.Type);
				if (path == null)
				{
					Paths.Add(defaultpath);
				}
			}

			List<PathEntry> entriesToRemove = new List<PathEntry>();

			//Remove entries that no longer exist in defaults
			foreach (PathEntry pathEntry in Paths)
			{
				var path = DefaultValues.FirstOrDefault(x => x.System == pathEntry.System && x.Type == pathEntry.Type);
				if (path == null)
				{
					entriesToRemove.Add(pathEntry);
				}
			}

			foreach (PathEntry entry in entriesToRemove)
			{
				Paths.Remove(entry);
			}

			//Add missing displaynames
			var missingDisplayPaths = Paths.Where(x => x.SystemDisplayName == null).ToList();
			foreach (PathEntry path in missingDisplayPaths)
			{
				path.SystemDisplayName = DefaultValues.FirstOrDefault(x => x.System == path.System).SystemDisplayName;

			}
		}

		//Some frequently requested paths, made into a property for convenience
		public string WatchPathFragment { get { return Global.Config.PathEntries["Global", "Watch (.wch)"].Path; } }
		public string MoviesPathFragment { get { return Global.Config.PathEntries["Global", "Movies"].Path; } }
		public string LuaPathFragment { get { return Global.Config.PathEntries["Global", "Lua"].Path; } }
		public string LogPathFragment { get { return Global.Config.PathEntries["Global", "Debug Logs"].Path; } }
		public string FirmwaresPathFragment { get { return Global.Config.PathEntries["Global", "Firmware"].Path; } }
		public string AvPathFragment { get { return Global.Config.PathEntries["Global", "A/V Dumps"].Path; } }
		
		//this one is special
		public string GlobalBaseFragment { get { return Global.Config.PathEntries["Global", "Base"].Path; } }

		public static List<PathEntry> DefaultValues
		{
			get
			{
				return new List<PathEntry>
				{
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Movies", Path = Path.Combine(".", "Movies"), Ordinal = 0 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Movie backups", Path = Path.Combine(".", "Movies", "backup"), Ordinal = 1 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Lua", Path = Path.Combine(".", "Lua"), Ordinal = 2 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Watch (.wch)", Path = ".", Ordinal = 3 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "A/V Dumps", Path = ".", Ordinal = 4 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Debug Logs", Path = ".", Ordinal = 5 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Firmware", Path = Path.Combine(".", "Firmware"), Ordinal = 6 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Base ROM", Path = ".", Ordinal = 6 },
					new PathEntry { System = "Global_NULL", SystemDisplayName="Global", Type = "Base", Path = ".", Ordinal = 6 },

					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "Base", Path = Path.Combine(".", "Intellivision"), Ordinal = 0 },
					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },
					new PathEntry { System = "INTV", SystemDisplayName="Intellivision", Type = "Palettes", Path = Path.Combine(".", "Palettes"),  Ordinal = 6 },

					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "Base", Path = Path.Combine(".", "NES"), Ordinal = 0 },
					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },
					new PathEntry { System = "NES", SystemDisplayName="NES", Type = "Palettes", Path = Path.Combine(".", "Palettes"),  Ordinal = 6 },

					new PathEntry { System = "SNES_SGB", SystemDisplayName="SNES", Type = "Base", Path = Path.Combine(".", "SNES"), Ordinal = 0 },
					new PathEntry { System = "SNES_SGB", SystemDisplayName="SNES", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "SNES_SGB", SystemDisplayName="SNES", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "SNES_SGB", SystemDisplayName="SNES", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "SNES_SGB", SystemDisplayName="SNES", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "SNES_SGB", SystemDisplayName="SNES", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "GBA", SystemDisplayName="GBA", Type = "Base", Path = Path.Combine(".", "GBA"), Ordinal = 0 },
					new PathEntry { System = "GBA", SystemDisplayName="GBA", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "GBA", SystemDisplayName="GBA", Type = "Savestates",  Path = Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "GBA", SystemDisplayName="GBA", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "GBA", SystemDisplayName="GBA", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "GBA", SystemDisplayName="GBA", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "SMS", SystemDisplayName="SMS", Type = "Base", Path= Path.Combine(".", "SMS"), Ordinal = 0 },
					new PathEntry { System = "SMS", SystemDisplayName="SMS", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "SMS", SystemDisplayName="SMS", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "SMS", SystemDisplayName="SMS", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "SMS", SystemDisplayName="SMS", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "SMS", SystemDisplayName="SMS", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "GG", SystemDisplayName="GG", Type = "Base", Path = Path.Combine(".", "Game Gear"), Ordinal = 0 },
					new PathEntry { System = "GG", SystemDisplayName="GG", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "GG", SystemDisplayName="GG", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "GG", SystemDisplayName="GG", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "GG", SystemDisplayName="GG", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "GG", SystemDisplayName="GG", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "SG", SystemDisplayName="SG", Type = "Base", Path = Path.Combine(".", "SG-1000"), Ordinal = 0 },
					new PathEntry { System = "SG", SystemDisplayName="SG", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "SG", SystemDisplayName="SG", Type = "Savestates",  Path = Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "SG", SystemDisplayName="SG", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "SG", SystemDisplayName="SG", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "SG", SystemDisplayName="SG", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "GEN", SystemDisplayName="Genesis", Type = "Base", Path = Path.Combine(".", "Genesis"), Ordinal = 0 },
					new PathEntry { System = "GEN", SystemDisplayName="Genesis", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "GEN", SystemDisplayName="Genesis", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "GEN", SystemDisplayName="Genesis", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "GEN", SystemDisplayName="Genesis", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "GEN", SystemDisplayName="Genesis", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "PCE_PCECD_SGX", SystemDisplayName="PC Engine", Type = "Base", Path = Path.Combine(".", "PC Engine"), Ordinal = 0 },
					new PathEntry { System = "PCE_PCECD_SGX", SystemDisplayName="PC Engine", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "PCE_PCECD_SGX", SystemDisplayName="PC Engine", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "PCE_PCECD_SGX", SystemDisplayName="PC Engine", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "PCE_PCECD_SGX", SystemDisplayName="PC Engine", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "PCE_PCECD_SGX", SystemDisplayName="PC Engine", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "Base", Path= Path.Combine(".", "Gameboy"), Ordinal = 0 },
					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },
					new PathEntry { System = "GB_GBC", SystemDisplayName="Gameboy", Type = "Palettes", Path = Path.Combine(".", "Palettes"),  Ordinal = 6 },

					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "Base", Path= Path.Combine(".", "Dual Gameboy"), Ordinal = 0 },
					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },
					new PathEntry { System = "DGB", SystemDisplayName="Dual Gameboy", Type = "Palettes", Path = Path.Combine(".", "Palettes"),  Ordinal = 6 },

					new PathEntry { System = "TI83", SystemDisplayName="TI83", Type = "Base", Path = Path.Combine(".", "TI83"), Ordinal = 0 },
					new PathEntry { System = "TI83", SystemDisplayName="TI83", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "TI83", SystemDisplayName="TI83", Type = "Savestates",  Path = Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "TI83", SystemDisplayName="TI83", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "TI83", SystemDisplayName="TI83", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "TI83", SystemDisplayName="TI83", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "A26", SystemDisplayName="Atari 2600", Type = "Base", Path = Path.Combine(".", "Atari 2600"), Ordinal = 0 },
					new PathEntry { System = "A26", SystemDisplayName="Atari 2600", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "A26", SystemDisplayName="Atari 2600", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "A26", SystemDisplayName="Atari 2600", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "A26", SystemDisplayName="Atari 2600", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "A78", SystemDisplayName="Atari 7800", Type = "Base", Path = Path.Combine(".", "Atari 7800"), Ordinal = 0 },
					new PathEntry { System = "A78", SystemDisplayName="Atari 7800", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "A78", SystemDisplayName="Atari 7800", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "A78", SystemDisplayName="Atari 7800", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "A78", SystemDisplayName="Atari 7800", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "A78", SystemDisplayName="Atari 7800", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "C64", SystemDisplayName="Commodore 64", Type = "Base", Path = Path.Combine(".", "C64"), Ordinal = 0 },
					new PathEntry { System = "C64", SystemDisplayName="Commodore 64", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "C64", SystemDisplayName="Commodore 64", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "C64", SystemDisplayName="Commodore 64", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "C64", SystemDisplayName="Commodore 64", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "PSX", SystemDisplayName="Playstation", Type = "Base", Path = Path.Combine(".", "PSX"), Ordinal = 0 },
					new PathEntry { System = "PSX", SystemDisplayName="Playstation", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "PSX", SystemDisplayName="Playstation", Type = "Savestates",  Path = Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "PSX", SystemDisplayName="Playstation", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "PSX", SystemDisplayName="Playstation", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "PSX", SystemDisplayName="Playstation", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "Coleco", SystemDisplayName = "Coleco", Type = "Base", Path = Path.Combine(".", "Coleco"), Ordinal = 0 },
					new PathEntry { System = "Coleco", SystemDisplayName = "Coleco", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "Coleco", SystemDisplayName = "Coleco", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "Coleco", SystemDisplayName = "Coleco", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "Coleco", SystemDisplayName = "Coleco", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "N64", SystemDisplayName = "N64", Type = "Base", Path= Path.Combine(".", "N64"), Ordinal = 0 },
					new PathEntry { System = "N64", SystemDisplayName = "N64", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "N64", SystemDisplayName = "N64", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "N64", SystemDisplayName = "N64", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "N64", SystemDisplayName = "N64", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "N64", SystemDisplayName = "N64", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },

					new PathEntry { System = "SAT", SystemDisplayName = "Saturn", Type = "Base", Path = Path.Combine(".", "Saturn"), Ordinal = 0 },
					new PathEntry { System = "SAT", SystemDisplayName = "Saturn", Type = "ROM", Path = ".", Ordinal = 1 },
					new PathEntry { System = "SAT", SystemDisplayName = "Saturn", Type = "Savestates",  Path= Path.Combine(".", "State"), Ordinal = 2 },
					new PathEntry { System = "SAT", SystemDisplayName = "Saturn", Type = "Save RAM", Path = Path.Combine(".", "SaveRAM"), Ordinal = 3 },
					new PathEntry { System = "SAT", SystemDisplayName = "Saturn", Type = "Screenshots", Path = Path.Combine(".", "Screenshots"), Ordinal = 4 },
					new PathEntry { System = "SAT", SystemDisplayName = "Saturn", Type = "Cheats", Path = Path.Combine(".", "Cheats"), Ordinal = 5 },
				};
			}
		}
	}
}