"""Replace two Emscripten dynamic invokers with equivalent static closures.
Adapted from Emscripten's DYNAMIC_EXECUTION=0 path (MIT/University of Illinois).
Input is npm @matbee/libreoffice-converter 2.7.2 wasm/soffice.js.
No CSP relaxation is required. LibreOffice wasm/data bytes are unchanged.
"""
from pathlib import Path
import argparse
parser=argparse.ArgumentParser()
parser.add_argument('input',type=Path,help='Original converter 2.7.2 wasm/soffice.js')
parser.add_argument('output',type=Path,help='Destination modified soffice.js')
args=parser.parse_args()
s=args.input.read_text()
start=s.index('function craftInvokerFunction(');end=s.index('var heap32VectorToArray=',start)
s=s[:start]+'''function craftInvokerFunction(humanName,argTypes,classType,cppInvokerFunc,cppTargetFunc,isAsync){
 if(isAsync)throwBindingError('Async bindings unavailable');
 const method=argTypes[1]!==null&&classType!==null,stack=usesDestructorStack(argTypes),expected=argTypes.length-2,min=getRequiredArgCount(argTypes);
 return createNamedFunction(humanName,function(...args){
  checkArgCount(args.length,min,expected,humanName,throwBindingError);
  const destructors=stack?[]:null,wired=[],params=[cppTargetFunc];let receiver,result;
  try{
   if(method){receiver=argTypes[1].toWireType(destructors,this);params.push(receiver)}
   for(let i=0;i<expected;i++){wired[i]=argTypes[i+2].toWireType(destructors,args[i]);params.push(wired[i])}
   result=cppInvokerFunc(...params);
  }finally{
   if(stack)runDestructors(destructors);
   else for(let i=method?1:2;i<argTypes.length;i++){if(argTypes[i].destructorFunction!=null)argTypes[i].destructorFunction(i===1?receiver:wired[i-2])}
  }
  if(argTypes[0].name!=='void')return argTypes[0].fromWireType(result);
 });
}''' +s[end:]
start=s.index('function __emval_get_method_caller(');end=s.index('function __emval_get_property(',start)
s=s[:start]+'''function __emval_get_method_caller(argCount,argTypes,kind){
 const types=emval_lookupTypes(argCount,argTypes),retType=types.shift();
 const caller=function(obj,func,destructorsRef,args){const values=[];let offset=0;for(const type of types){values.push(type.readValueFromPointer(args+offset));offset+=type.argPackAdvance}const rv=kind===1?Reflect.construct(func,values):func.call(...(kind===0?[obj,...values]:values));if(!retType.isVoid)return emval_returnValue(retType,destructorsRef,rv)};
 return emval_addMethodCaller(createNamedFunction('methodCaller',caller));
}''' +s[end:]
assert 'newFunc(Function' not in s
args.output.write_text('// Iskra modification 2026-10-10: static Emscripten invokers; see qa/office-csp-patch.py.\n'+s)