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
    {
        TexturePacker texturePacker;

        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\", 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.";
                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)
        {
            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.");
                    texturePacker = new TexturePacker((arguments[i + 1]));
                }
            }
            if (texturePacker != null)
            {
                texturePacker.Build();

                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.");
                        }
                    }
                }

                for (int i = 0; i < arguments.Length; i++)
                {
                    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.)");
                        texturePacker.Save(Path.GetDirectoryName(arguments[i + 1]), Path.GetFileName(arguments[i + 1]));
                        return;
                    }

                    if (i == arguments.Length - 1)
                    {
                        throw new ArgumentException("no -o argument found to specify output.");
                    }
                }
            } else
            {
                throw new ArgumentException("-i not specified.");
            }
        }
    }
}