using RecrownedAthenaeum.Tools.CommandProcessor;
using RecrownedAthenaeum.Tools.TextureAtlas;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace RecrownedAthenaeum.Tools.TextureAtlasTools
{
    class TexturePackerCommand : EngineCommand
    {

        public TexturePackerCommand() : base("texturepacker") { }

        public override string Help(string argument)
        {
            switch (argument)
            {
                case null:
                    return "Packs a given directory composed of png and jpg files into an atlas. Can also add 9patch properties. Possible arguments are \"-i\", \"-o\", \"-mp\",  \"-dau\", and \"-9p\". Refer to \"help\" for more info.";
                case "-i":
                    return "-i : Path for input directory containing the textures. Required.";
                case "-o":
                    return "-o : Path for output files. Points to non-existent file. Will create texture and definitions file with name. Required.";
                case "-9p":
                    return "-9p : Can be used multiple times for defining a 9patch. This parameter requires a name, left patch, right patch, top patch, and bottom patch in the format name,a,b,c,d. Optional.";
                case "-sp":
                    return "-sp : starting power for one side of the texture. Default is 8.";
                case "-mp":
                    return "-mp : Maximum power for one side of the texture. Default is 8.";
                case "-dau":
                    return "-dau : disables automatically upscaling the texture.";
                default:
                    return argument + " is not a valid argument. Type \"help texturepacker to see general help and list of arguments.\"";
            }
        }

        public override void Run(string[] arguments)
        {
            TexturePacker texturePacker = null;
            string path = null;
            int mp = 8;
            int sp = 8;
            bool dau = false;
            string output = null;

            if (arguments == null) throw new ArgumentException("Requires arguments. Type \"help texturepacker\" for more info.");

            for (int i = 0; i < arguments.Length; i++)
            {
                if (arguments[i] == "-i")
                {
                    if (i + 1 == arguments.Length) throw new ArgumentException("-i is not followed by path for input directory.");
                    path = arguments[i + 1];
                }
                if (arguments[i] == "-mp")
                {
                    if (i + 1 >= arguments.Length || !int.TryParse(arguments[i + 1], out mp)) throw new ArgumentException("mp is not followed by maximum power.");
                }
                if (arguments[i] == "-sp")
                {
                    if (i + 1 >= arguments.Length || !int.TryParse(arguments[i + 1], out sp)) throw new ArgumentException("sp is not followed by maximum power.");
                }
                if (arguments[i] == "-o")
                {
                    if (i + 1 >= arguments.Length) throw new ArgumentException("-o is not followed by path for output files. (eg. path/to/file where file is the name for the atlas.)");
                    output = arguments[i + 1];
                }

                if (i == arguments.Length - 1 && output == null)
                {
                    throw new ArgumentException("no -o argument found to specify output.");
                }

                if (arguments[i] == "-dau") dau = true;
            }
            texturePacker = new TexturePacker(path, mp, sp);
            ConsoleUtilities.WriteWrappedLine("Calculated minimum texture size: " + texturePacker.TextureLength + "x" + texturePacker.TextureLength + " with a total of " + texturePacker.TexturesFound + " textures.");
            if (texturePacker != null)
            {
                try
                {
                    texturePacker.Build(!dau);
                }
                catch (InvalidOperationException e)
                {
                    throw new ArgumentException(e.Message);
                }

                for (int i = 0; i < arguments.Length; i++)
                {
                    if (arguments[i] == "-9p")
                    {
                        if (i + 5 >= arguments.Length) throw new ArgumentException("-9p is not followed by proper specifiers for a 9Patch (format: \"-9p textureName,a,b,c,d\" where a, b, c, and d are integers definining the border regions for the 9patch.)");
                        string[] nPatchArgs = arguments[i + 1].Split(',');
                        try
                        {
                            texturePacker.SetNinePatch(nPatchArgs[0], int.Parse(nPatchArgs[1]), int.Parse(nPatchArgs[2]), int.Parse(nPatchArgs[3]), int.Parse(nPatchArgs[4]));
                        }
                        catch (FormatException)
                        {
                            throw new ArgumentException("-9p argument parameters must be in the format \"-9p textureName,a,b,c,d\" where a, b, c, and d are integers definining the border regions for the 9patch.");
                        }
                    }
                }
                texturePacker.Save(Path.GetDirectoryName(output), Path.GetFileName(output));
                Console.WriteLine("Complete. Final texture size: " + texturePacker.TextureLength + "x" + texturePacker.TextureLength + ".");
            }
            else
            {
                throw new ArgumentException("-i not specified.");
            }
        }
    }
}