"""Minimal FIX feed simulator adapter.

This module provides a tiny, test-friendly FIX-like feed generator that
produces LocalEvent payloads compatible with the core types.
"""
from __future__ import annotations

import time
from deltatrace.core import LocalEvent


class FIXFeedSimulator:
    def __init__(self, instrument: str = "EURUSD", source_id: str = "FIXFIX") -> None:
        self.instrument = instrument
        self.source_id = source_id
        self._counter = 0

    def tick(self) -> LocalEvent:
        self._counter += 1
        evt = LocalEvent(
            instrument=self.instrument,
            timestamp=time.time(),
            data_hash=f"hash-{self._counter}",
            source_id=self.source_id,
            version="0.1",
            payload={"type": "MDTick", "seq": self._counter},
        )
        return evt