var filterTotal = 5;
var varTotal = 5;
var varSharedData = true;
var varDynamicBuffer = true;
var varEntity = true;
var varDelta = true;

console.log('using Unity.Entities;');
console.log('using UnityEngine;');
console.log('');

console.log('public abstract class QuickSystemBase : ComponentSystem  {');
console.log('    public ComponentGroup m_MainGroup;');
console.log('}');
console.log('');

for (var i = 0; i < 6; i++) {
  for (var k = 0; k < 3; k++) {
    for (var m = 0; m < 2; m++) {
      for (var l = 0; l < 2; l++) {
        for (var j = 1; j < 6; j++) {
          var generics = [];
          var structs = [];
          filterTotal = i;
          varTotal = j;
          varSharedData = k === 1;
          varDynamicBuffer = k === 2;
          varEntity = l === 1;
          varDelta = m === 1;
          for (var filter = 0; filter < filterTotal; filter++) {
            generics.push("F"+(filter+1));
          }
          varSharedData ? generics.push("S"): 0;
          varDynamicBuffer ? generics.push("D"): 0;
          for (var total = 0; total < varTotal; total++) {
            generics.push("T"+(total+1));
            structs.push("T"+(total+1));
          }
          console.log('public abstract class QuickSystem'+
            getName(filterTotal, varSharedData, varDynamicBuffer, varEntity, varDelta)+
            '<'+generics.join(', ')+'> : QuickSystemBase' +
            (varSharedData ? ' where S : struct, ISharedComponentData': '')+
            (varDynamicBuffer ? ' where D : struct, IBufferElementData': '')+
            ' where '+ structs.join(' : struct, IComponentData where ') + ': struct, IComponentData {'
          );
          console.log('  protected override void OnCreateManager() {');
          console.log('    m_MainGroup = GetComponentGroup('+getGroupTypes(generics)+');');
          console.log('  }');
          console.log('  protected override void OnUpdate() {');
          if (varDelta) {
            console.log('    float delta = Time.deltaTime;');
          }
          console.log('      ForEach(('+forEachContent(true, varSharedData, varDynamicBuffer, varEntity, structs)+') => {');
          console.log('          OnUpdate('+forEachContent(false, varSharedData, varDynamicBuffer, varEntity, structs)+
            (varDelta? ', delta': '')+');');
          console.log('      }, m_MainGroup);');
          console.log('  }');
          console.log('  protected abstract void OnUpdate('+forEachContent(true, varSharedData, varDynamicBuffer, varEntity, structs)+
            (varDelta? ', float delta': '')+');');
          console.log('}');
        }
      }
    }
  }
}
function getName(filterTotal, varSharedData, varDynamicBuffer, varEntity, varDelta) {
  return (filterTotal > 0? 'Filter'+filterTotal: '')+
  (varEntity?'Entity': '')+(varSharedData?'Shared': '')+(varDynamicBuffer?'Buffer': '')+(varDelta?'Delta': '')
}

function getGroupTypes(generics) {
  return 'typeof('+ generics.join('), typeof(')+')';
}
function forEachContent(hasType, varSharedData, varDynamicBuffer, varEntity, structs) {
  return (varEntity?(hasType?'Entity': '')+' e, ': '')+(varSharedData?(hasType?'S': '')+' s, ': '')+
  (varDynamicBuffer?(hasType?'DynamicBuffer<D>': '')+' d, ': '') +
  structsAsTypes(hasType, structs);
}
function structsAsTypes(hasType, structs) {
  var ret = '';
  for (var a = 0; a < structs.length; a++) {
    ret += 'ref '+(hasType?structs[a]: '') + ' ' + structs[a].toLowerCase() + (a < structs.length-1?', ': '');
  }
  return ret;
}