import 'package:libac_dart/omv/types/integer.dart';
import 'package:libac_dart/omv/types/key.dart';
import 'package:libac_dart/omv/types/list.dart';
import 'package:libac_dart/omv/types/rotation.dart';
import 'package:libac_dart/omv/types/string.dart';
import 'package:libac_dart/omv/types/vector.dart';

abstract class SLEvents {
  void at_rot_target(
      Integer iHandle, Rotation rTargetRotation, Rotation rCurrentRotation);
  void at_target(
      Integer iHandle, Vector vTargetPosition, Vector vCurrrentPosition);
  void attach(Key kAttached);
  void changed(Integer iChangedFlags);
  void collision(Integer iCollisionCount);
  void collision_end(Integer iCollisionCount);
  void collision_start(Integer iCollisionCount);
  void control(Key kID, Integer iLevels, Integer iEdges);
  void dataserver(Key kRequestID, string sData);
  void email(string sTime, string sAddress, string sSubject, string sBody,
      Integer iRemaining);
  void http_response(
      Key kRequestID, Integer iStatus, list lMetadata, string sBody);
  void http_request(Key kRequestID, string sMethod, string sBody);
  void land_collision(Vector vPosition);
  void land_collision_end(Vector vPosition);
  void land_collision_start(Vector vPosition);
  void link_message(
      Integer iSenderLinkIndex, Integer iNumber, string sText, Key kID);
  void linkset_data(Integer action, string name, string value);
  void listen(Integer iChannel, String sName, Key kID, String sText);
  void money(Key kPayerID, Integer iAmount);
  void moving_end();
  void moving_start();
  void no_sensor();
  void not_at_rot_target();
  void not_at_target();
  void object_rez(Key kID);
  void on_rez(Integer iStartParameter);
  void path_update(Integer iType, list lReserved);
  void remote_data(Integer iEventType, Key kChannelID, Key kMessageID,
      string sSender, Integer iData, string sData);
  void run_time_permissions(Integer iPermissionsFlags);
  void sensor(Integer iSensedCount);
  void state_entry();
  void state_exit();
  void timer();
  void touch(Integer iTouchesCount);
  void touch_end(Integer iTouchesCount);
  void touch_start(Integer iTouchesCount);
  void transaction_result(Key kID, Integer iSuccess, string sMessage);
}

/// Custom execution stack to mimic compilation behavior
/// A script is composed of states, which have every event listed in SLEvents, or OSEvents which inherits SLEvents
/// Each event will be composed of an execution stack. Custom function can be defined, they shall be stored in a dictionary with their execution stack
///
/// The execution stack should execute each function contained within in sequential order.
///
/// The execution stack cannot be altered once created, it is designed to be assembled, then executed, to change it, one must create a new stack.
///
/// Variables are defined in the SLMemoryStack.
/// On parse, a variable will be created, then inserted into the memory stack. Naming convention is as follows.
/// global: g_<name>
/// global_function: g_f<name>
/// local: <state>_<event>_<name>
///
/// Any function here will need to be parsed properly to edit the memory stack if applicable before adding it to the execution stack
///
/// NOTE: Dart does not have a JIT Compiler that can at runtime without the Dart SDK compile a dynamic dart script against the running application
/// To make up for this, we must put in place a structure that would allow parsing the script and still allowing execution within our own codebase.
class SLExecutionStack {
  List<Function> _stack = [];

  void add(Function fnc) {
    _stack.add(fnc);
  }

  void execute() {
    for (var f in _stack) {
      f.call();
    }
  }
}

/// This memory stack is meant to be allocated per script. See naming convention specified in SLExecutionStack documentation
///
/// NOTE: If memory is not present, it will return a blank string
class SLMemoryStack {
  Map<String, dynamic> _memory = {};

  void set(String name, dynamic memory) {
    _memory[name] = memory;
  }

  dynamic get(String name) {
    return _memory[name] ?? "";
  }
}