#include"YukaSystem2.h"
/** jichi 7/6/2014 YukaSystem2
 *  Sample game: セミラミスの天秤
 *
 *  Observations from Debug:
 *  - Ollydbg got UTF8 text memory address
 *  - Hardware break points have loops on 0x4010ED
 *  - The hooked function seems to take 3 parameters, and arg3 is the right text
 *  - The text appears character by character
 *
 *  Runtime stack:
 *  - return address
 *  - arg1 pointer's pointer
 *  - arg2 text
 *  - arg3 pointer's pointer
 *  - code address or -1, maybe a handle
 *  - unknown pointer
 *  - return address
 *  - usually zero
 *
 *  0040109d     cc             int3
 *  0040109e     cc             int3
 *  0040109f     cc             int3
 *  004010a0  /$ 55             push ebp
 *  004010a1  |. 8bec           mov ebp,esp
 *  004010a3  |. 8b45 14        mov eax,dword ptr ss:[ebp+0x14]
 *  004010a6  |. 50             push eax                                 ; /arg4
 *  004010a7  |. 8b4d 10        mov ecx,dword ptr ss:[ebp+0x10]          ; |
 *  004010aa  |. 51             push ecx                                 ; |arg3
 *  004010ab  |. 8b55 0c        mov edx,dword ptr ss:[ebp+0xc]           ; |
 *  004010ae  |. 52             push edx                                 ; |arg2
 *  004010af  |. 8b45 08        mov eax,dword ptr ss:[ebp+0x8]           ; |
 *  004010b2  |. 50             push eax                                 ; |arg1
 *  004010b3  |. e8 48ffffff    call semirami.00401000                   ; \semirami.00401000
 *  004010b8  |. 83c4 10        add esp,0x10
 *  004010bb  |. 8b45 08        mov eax,dword ptr ss:[ebp+0x8]
 *  004010be  |. 5d             pop ebp
 *  004010bf  \. c3             retn
 *  004010c0  /$ 55             push ebp
 *  004010c1  |. 8bec           mov ebp,esp
 *  004010c3  |. 8b45 14        mov eax,dword ptr ss:[ebp+0x14]
 *  004010c6  |. 50             push eax                                 ; /arg4
 *  004010c7  |. 8b4d 10        mov ecx,dword ptr ss:[ebp+0x10]          ; |
 *  004010ca  |. 51             push ecx                                 ; |arg3
 *  004010cb  |. 8b55 0c        mov edx,dword ptr ss:[ebp+0xc]           ; |
 *  004010ce  |. 52             push edx                                 ; |arg2
 *  004010cf  |. 8b45 08        mov eax,dword ptr ss:[ebp+0x8]           ; |
 *  004010d2  |. 50             push eax                                 ; |arg1
 *  004010d3  |. e8 58ffffff    call semirami.00401030                   ; \semirami.00401030
 *  004010d8  |. 83c4 10        add esp,0x10
 *  004010db  |. 8b45 08        mov eax,dword ptr ss:[ebp+0x8]
 *  004010de  |. 5d             pop ebp
 *  004010df  \. c3             retn
 *  004010e0  /$ 55             push ebp ; jichi: function begin, hook here, bp-based frame, arg2 is the text
 *  004010e1  |. 8bec           mov ebp,esp
 *  004010e3  |. 8b45 08        mov eax,dword ptr ss:[ebp+0x8] ; jichi: ebp+0x8 = arg2
 *  004010e6  |. 8b4d 0c        mov ecx,dword ptr ss:[ebp+0xc] ; jichi: arg3 is also a pointer of pointer
 *  004010e9  |. 8a11           mov dl,byte ptr ds:[ecx]
 *  004010eb  |. 8810           mov byte ptr ds:[eax],dl    ; jichi: eax is the data
 *  004010ed  |. 5d             pop ebp
 *  004010ee  \. c3             retn
 *  004010ef     cc             int3
 */

// Ignore image and music file names
// Sample text: "Voice\tou00012.ogg""運命論って云うのかなあ……神さまを信じてる人が多かったからだろうね、何があっても、それ�神さまが�刁�ちに与えられた試練なんだって、そ぀�ってたみたい。勿論、今でもそ぀��てあ�人はぁ�ぱぁ�るん�けど�
// Though the input string is UTF-8, it should be ASCII compatible.
static bool _yk2garbage(const char *p)
{
  //Q_ASSERT(p);
  while (char ch = *p++) {
    if (!(
        ch >= '0' && ch <= '9' ||
        ch >= 'A' && ch <= 'z' || // also ignore ASCII 91-96: [ \ ] ^ _ `
        ch == '"' || ch == '.' || ch == '-' || ch == '#'
      ))
    return false;
  }
  return true;
}

// Get text from arg2
static void SpecialHookYukaSystem2(hook_stack* stack,  HookParam *hp, uintptr_t *data, uintptr_t *split, size_t*len)
{
  DWORD arg2 = stack->stack[2], // [esp+0x8]
        arg3 = stack->stack[3]; // [esp+0xc]
        //arg4 = argof(4, esp_base); // there is no arg4. arg4 is properlly a function pointer
  LPCSTR text = (LPCSTR)arg2;
  if (*text && !_yk2garbage(text)) { // I am sure this could be null
    *data = (DWORD)text;
    *len = ::strlen(text); // UTF-8 is null-terminated
    if (arg3)
      *split = *(DWORD *)arg3;
  }
}


bool InsertYukaSystem2Hook()
{
  const BYTE bytes[] = {
    0x55,            // 004010e0  /$ 55             push ebp ; jichi; hook here
    0x8b,0xec,       // 004010e1  |. 8bec           mov ebp,esp
    0x8b,0x45, 0x08, // 004010e3  |. 8b45 08        mov eax,dword ptr ss:[ebp+0x8] ; jichi: ebp+0x8 = arg2
    0x8b,0x4d, 0x0c, // 004010e6  |. 8b4d 0c        mov ecx,dword ptr ss:[ebp+0xc]
    0x8a,0x11,       // 004010e9  |. 8a11           mov dl,byte ptr ds:[ecx]
    0x88,0x10,       // 004010eb  |. 8810           mov byte ptr ds:[eax],dl    ; jichi: eax is the address to text
    0x5d,            // 004010ed  |. 5d             pop ebp
    0xc3             // 004010ee  \. c3             retn
  };
  //enum { addr_offset = 0 };
  ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
  ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
  //GROWL_DWORD(addr); // supposed to be 0x4010e0
  if (!addr) {
    ConsoleOutput("YukaSystem2: pattern not found");
    return false;
  }

  HookParam hp;
  hp.address = addr;
  hp.offset=get_stack(1);
  hp.split=get_stack(2);
  hp.type =USING_SPLIT| USING_STRING|CODEC_UTF8; // UTF-8, though
  hp.filter_fun=[](void* data, size_t* len, HookParam* hp){
    //セミラミスの天秤
    //セミラミスの天秤 Fated Dolls
    if(data==0)return false;
     
    if(all_ascii(reinterpret_cast<char*>(data),*len))return false;
    auto str=std::string(reinterpret_cast<char*>(data),*len);
 
    str = std::regex_replace(str, std::regex(R"(@r\((.*?),(.*?)\))"), "$1");
  
    auto wstr=StringToWideString(str);

    if(wstr.size()==1)return false; 

    for(auto wc:wstr){
      if((wc>='A' && wc<='z')||
        (wc>='0' && wc<='9')||
        (wc=='"')||(wc=='.')||(wc=='-')||(wc=='#')||
        (wc==65533)||(wc==2))return false;
    }
 
    *len = (str.size())  ;
    strcpy(reinterpret_cast<char*>(data), str.c_str());
    return true; 
  };
  //hp.text_fun = SpecialHookYukaSystem2;
  ConsoleOutput("INSERT YukaSystem2");
  return NewHook(hp, "YukaSystem2");
}
namespace{
  bool hook2(){
    //君を仰ぎ乙女は姫に
    //ずっとつくしてあげるの!
    const BYTE bytes[] = {
      0x0F,0xB6,0x07,
      0x83,0xE8,0x40,
      0x75,XX,
      0x0F,0xB6,0x47,0x01,
      0x83,0xE8,0x67,
      0x8D,0x4F,0x01,
      0x75,XX,
      0x0F,0xB6,0x41,0x01,
      0x83,0xC1,0x01,
      0x83,0xE8,0x66,
      0x74,XX
    };
    //enum { addr_offset = 0 };
    ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
    ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
    //GROWL_DWORD(addr); // supposed to be 0x4010e0
    if (!addr)  return false; 
    addr = MemDbg::findEnclosingAlignedFunction(addr);
    if (!addr)  return false; 
    HookParam hp;
    hp.address = addr;
    hp.offset=get_stack(2); 
    hp.type = USING_SPLIT|DATA_INDIRECT;
    hp. index=0;
    hp.split=get_stack(1);
    return NewHook(hp, "YukaSystem2"); 
  }
}
namespace __{ 
bool YukaSystem1Filter(LPVOID data, size_t *size, HookParam *)
{
  auto text = reinterpret_cast<LPSTR>(data);
  auto len = reinterpret_cast<size_t *>(size);

  if (*len == 0) return false;

  // if acii add a space at the end of the sentence overwriting null terminator
  if (*len >=2 && text[*len-2]>0)
    text[(*len)++] = ' ';

  if (cpp_strnstr(text, "@r(", *len)) {
    StringFilterBetween(text, len, "@r(", 3, ")", 1); // @r(2,はと)
  }

  return true;
}

bool InsertYukaSystem1Hook()
{
  /*
  * Sample games:
  * https://vndb.org/r71601
  * https://vndb.org/v7507
  */
  const BYTE bytes[] = {
    0x80, 0x3D, XX4, 0x01,      // cmp byte ptr [kimihime.exe+16809C],01     << hook here
    0x75, 0x11,                 // jne kimihime.exe+42D74
    0xB9, XX4,                  // mov ecx,kimihime.exe+C7F8C
    0xC6, 0x05, XX4, 0x00       // mov byte ptr [kimihime.exe+1516C5],00
  };
  ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
  ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
  if (!addr) {
    ConsoleOutput("YukaSystem1: pattern not found");
    return false;
  }

  HookParam hp;
  hp.address = addr;
  hp.offset=get_reg(regs::eax);
  hp.type = USING_STRING | KNOWN_UNSTABLE;
  hp.filter_fun = YukaSystem1Filter;
  ConsoleOutput("INSERT YukaSystem1");
  return NewHook(hp, "YukaSystem1");
}
}
  
bool YukaSystem2::attach_function() {  
    bool _1=__::InsertYukaSystem1Hook();
    return InsertYukaSystem2Hook()||hook2()||_1;
}