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

namespace ResBuilder
{
    class UIXmlPacker
    {
        public readonly string inputPath;

        public readonly string outputFile;

        public readonly bool isZipData;

        public UIXmlPacker(string input , string output , bool isZip)
        {
            this.inputPath = input;
            this.outputFile = Path.Combine(output , "ui.bin");
            this.isZipData = isZip;
        }

        string GetWriteFileName(string fp)
        {
            if (fp.StartsWith(inputPath))
            {
                fp = fp.Substring(fp.IndexOf("xmds_ui"));
                fp = fp.Replace('\\', '/');
                fp = fp.Substring(0, fp.LastIndexOf(".gui."));
            }
            return fp;
        }

        public void Pack()
        {
            var files = Directory.GetFiles(inputPath, "*.gui.bin", SearchOption.AllDirectories);
            // -- 1  Hash 文件名称
            var nameHashs = new uint[files.Length];
            var fileNameHash = new Dictionary<uint, string>();
            for (int i = 0; i < files.Length; i++)
            {
                var relativeFilePath = files[i].Substring(inputPath.Length + 1);
                var hash = Tools.HashFileNameWithoutExtension(relativeFilePath);
                if (fileNameHash.ContainsKey(hash))
                {
                    throw new Exception(string.Format("文件名hash冲突:{0} -> {1}", fileNameHash[hash], relativeFilePath));
                }
                else
                {
                    fileNameHash.Add(hash, relativeFilePath);
                }
                nameHashs[i] = hash;
            }
            // -- 打包文件
            using (var ms = new MemoryStream())
            {
                var bw = new BinaryWriter(ms);
                bw.Write(files.Length);
                for (int i = 0; i < files.Length; i++)
                {
                    bw.Write(nameHashs[i]);
                    var fdat = File.ReadAllBytes(files[i]);
                    bw.Write(fdat.Length);
                    bw.Write(fdat);
                }
                var data = ms.ToArray();
                if (this.isZipData)
                {
                    data = LZMAHelper.Compress(data);
                }
                File.WriteAllBytes(outputFile, data);
            }
        }
    }
}