# -*- coding: utf-8 -*-
"""RTT 传输：薄封装 rtt_pitch_reg_test 的 J-Link/RTT 实现（单一事实来源，避免复制）."""
from __future__ import annotations

from contextlib import contextmanager

from ..paths import TOOLS_DIR  # noqa: F401  (确保 sys.path 已注入)

import rtt_pitch_reg_test as _rtt

# 直接复用，保持零行为变更
connect_jlink = _rtt.connect_jlink
find_rtt_control_block = _rtt.find_rtt_control_block
wait_rtt_ready = _rtt.wait_rtt_ready
RttSession = _rtt.RttSession
analyze_lines = _rtt.analyze_lines
CheckResult = _rtt.CheckResult


@contextmanager
def open_session(device: str = "AT32F403AC", *, reset: bool = True):
    """连接 J-Link + 启动 RTT，yield RttSession；退出时清理.

    reset=True：先硬件复位并等待开机，避免前序 LCD/烧写把主循环卡死导致无 ACK。
    """
    import time

    _rtt.import_deps()
    jlink = connect_jlink(device)
    try:
        if reset:
            try:
                jlink.reset(halt=False)
            except Exception:
                pass
            time.sleep(5.0)
        cb = find_rtt_control_block(jlink)
        if cb is None:
            raise SystemExit("SEGGER RTT control block 未找到（固件未运行？）")
        print(f"RTT CB @ 0x{cb:08X}", flush=True)
        jlink.rtt_start(cb)
        wait_rtt_ready(jlink)
        sess = RttSession(jlink)
        sess.pump(0.3)
        yield sess
    finally:
        try:
            jlink.rtt_stop()
        except Exception:
            pass
        jlink.close()