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

namespace ArchiveUnpack
{
    /// <summary>
    /// 解包.awb包
    /// <para>只解包不还原</para>
    /// </summary>
    public class AWBUnpack : FileUnpack
    {

        AWBHeaderOne[] Headers = null;

        public AWBUnpack(string FilePath)
        {
            if (File.Exists(FilePath))
            {
                _File = new FileInfo(FilePath);
                _File_FS = File.Open(_File.FullName, FileMode.Open);
            }
            else
            {
                Log("{0}.constructor:{1} is not exist.", GetType(), FilePath);
            }
        }

        public string GetJSObject()
        {
            if (Headers == null)
            {
                ReadHeader();
            }

            int HeaderCount = Headers.Length;

            string JS_Script = "var infiles=[";

            for (int i = 0; i < HeaderCount; i++)
            {
                if (!Headers[i].Name.Contains(".png") && !Headers[i].Name.Contains(".jpg"))
                {
                    JS_Script += "'" + Headers[i].Name + "'" + (i < HeaderCount - 1 ? "," : "];");
                }
            }

            File.WriteAllText("jsobject.js",JS_Script);

            return JS_Script;
        }

        public string GetTextObject()
        {
            if (Headers == null)
            {
                ReadHeader();
            }

            int HeaderCount = Headers.Length;

            string JS_Script = "";

            for (int i = 0; i < HeaderCount; i++)
            {
                   JS_Script += Headers[i].Name + (i < HeaderCount - 1 ? "\n" : ""); ;
            }

            File.WriteAllText("PathList.txt", JS_Script);

            return JS_Script;
        }

        public override void ReadHeader()
        {
            base.ReadHeader();

            int ListCount = ReadInt32();
            Headers = new AWBHeaderOne[ListCount];

            for (int i = 0; i < ListCount; i++)
            {
                int NameCount = ReadByte();
                Headers[i] = new AWBHeaderOne()
                {
                    NameCount = NameCount,
                    Index = ReadInt32(),
                    Name = ReadString(NameCount),
                    //.Replace(".png",".mng").Replace(".jpg",".mpg"),
                };

#if DEBUG
                //Console.WriteLine(Headers[i].Name);                
#endif
            }

        }

        public override void Unpack()
        {
            base.Unpack();

            if (Headers == null)
            {
                ReadHeader();
            }

            int HeaderCount = Headers.Length;

            for (int i = 0; i < HeaderCount; i++)
            {
                try
                {
                    int len = Headers[i].Index;
                    byte[] data = new byte[len];
                    Headers[i].Set();
                    if (!string.IsNullOrEmpty("Source/" + Headers[i].Path))
                    {
                        Directory.CreateDirectory("Source/" + Headers[i].Path);
                    }
                    _File_FS.Read(data, 0, len);
                    File.WriteAllBytes("Source/" + Headers[i].Name, data);

                    //if(Encoding.UTF8.GetString(data).Contains("IHDR"))
                    //{
                    //    Log("IHDR find in {0}", Headers[i].Name);
                    //}
                }catch(Exception e)
                {
                    Log("{0} error: {1}", GetType(), e.Message);
                }
            }

            Log("Read over on {0}.", _File_FS.Position);

        }
    }
}