"""Parser regression tests — pin down the ``rstrip("|")`` invariant that took
us two debugging rounds to find (see docs/sources/easyeda_pro_source.md §3.1).
"""

from tools.epro2.parser import parse_line, Epro2ParseError


def test_dochead_with_trailing_pipe():
    ln = b'{"type":"DOCHEAD","ticket":2}||{"docType":"BOARD","uuid":"35086b7d90787675","editVersion":"3.2.127"}|'
    op = parse_line(ln)
    assert op.type == "DOCHEAD"
    assert op.ticket == 2
    assert op.payload["docType"] == "BOARD"
    assert op.payload["uuid"] == "35086b7d90787675"
    assert op.payload["editVersion"] == "3.2.127"


def test_three_part_message():
    """Some types carry an `extra` third field after the second `||`."""
    ln = b'{"type":"WIRE","ticket":1009,"id":"e3514"}||{"groupId":""}||{"meta":1}|'
    op = parse_line(ln)
    assert op.type == "WIRE"
    assert op.id == "e3514"
    assert op.payload == {"groupId": ""}
    assert op.extra == {"meta": 1}


def test_id_only_no_payload_yields_none_payload():
    ln = b'{"type":"COMPONENT","ticket":7,"id":"e1"}|'
    op = parse_line(ln)
    assert op.type == "COMPONENT"
    assert op.id == "e1"
    assert op.payload is None  # downstream replay treats this as a delete


def test_bad_head_raises():
    try:
        parse_line(b"not json||{}|")
    except Epro2ParseError:
        return
    raise AssertionError("expected Epro2ParseError")


def test_empty_line_raises():
    try:
        parse_line(b"|")
    except Epro2ParseError:
        return
    raise AssertionError("expected Epro2ParseError")


def test_payload_with_embedded_pipes():
    """An embedded `|` inside a JSON string must NOT be treated as a separator."""
    ln = b'{"type":"ATTR","ticket":3,"id":"e1"}||{"key":"Symbol","value":"a|b|c"}|'
    op = parse_line(ln)
    assert op.payload["value"] == "a|b|c"