"""IMP-#91 u14 — unit tests for the status-board marker updater.

Exercises ``parse_outcomes`` (nodeid → axis/mdx outcome mapping) and
``update_board_text`` (idempotent marker rewrite). u15 will wire the CLI
into the GitHub Actions workflow; these tests guard the contract.
"""
from __future__ import annotations

import re
import sys
from pathlib import Path

REPO_ROOT = Path(__file__).resolve().parents[2]
sys.path.insert(0, str(REPO_ROOT / "scripts"))

import update_status_board as usb  # noqa: E402

IMP95_BOARD_PATH = (
    REPO_ROOT / "docs" / "architecture" / "PHASE-Z-PIPELINE-STATUS-BOARD.md"
)
IMP95_MARKER_RE = re.compile(
    r"(<!-- IMP-95:(j\d+) -->)(.*?)(<!-- /IMP-95 -->)", re.DOTALL
)
IMP95_EXPECTED_AXES = {"j1", "j2", "j3", "j4", "j5", "j6", "j7", "j8"}
IMP95_ALLOWED_VALUES = {"pending", "trace-only", "guarded", "active"}


SAMPLE_REPORT = {
    "tests": [
        {
            "nodeid": "tests/integration/test_multi_mdx_regression.py::test_normalize_snapshot_matches[01]",
            "outcome": "passed",
        },
        {
            "nodeid": "tests/integration/test_multi_mdx_regression.py::test_v4_ranking_snapshot_matches[02]",
            "outcome": "passed",
        },
        {
            "nodeid": "tests/integration/test_multi_mdx_regression.py::test_layout_snapshot_matches[03]",
            "outcome": "failed",
        },
        {
            "nodeid": "tests/integration/test_multi_mdx_regression.py::test_pipeline_run_produces_step20_status[02]",
            "outcome": "passed",
        },
    ]
}


def test_parse_outcomes_maps_known_axes_only() -> None:
    outcomes = usb.parse_outcomes(SAMPLE_REPORT)
    assert outcomes == {
        ("F0", "01"): "PASS",
        ("F1", "02"): "PASS",
        ("F4", "03"): "FAIL",
    }


def test_update_board_text_rewrites_markers() -> None:
    board = "F0/01: <!-- IMP-91:F0:01 -->?<!-- /IMP-91 --> F1/02: <!-- IMP-91:F1:02 -->old<!-- /IMP-91 -->"
    outcomes = {("F0", "01"): "PASS"}
    result = usb.update_board_text(board, outcomes)
    assert "<!-- IMP-91:F0:01 -->PASS<!-- /IMP-91 -->" in result
    assert "<!-- IMP-91:F1:02 -->?<!-- /IMP-91 -->" in result


def test_update_board_text_is_idempotent() -> None:
    board = "<!-- IMP-91:F2:05 -->old<!-- /IMP-91 -->"
    outcomes = {("F2", "05"): "PASS"}
    once = usb.update_board_text(board, outcomes)
    twice = usb.update_board_text(once, outcomes)
    assert once == twice == "<!-- IMP-91:F2:05 -->PASS<!-- /IMP-91 -->"


def test_imp95_markers_present_and_well_formed() -> None:
    """IMP-95 sub-axis markers all present in section 9 with allowed values."""
    board = IMP95_BOARD_PATH.read_text(encoding="utf-8")
    matches = IMP95_MARKER_RE.findall(board)
    axes = {axis for _, axis, _, _ in matches}
    assert axes == IMP95_EXPECTED_AXES, (
        f"IMP-95 axes drift: expected {IMP95_EXPECTED_AXES}, got {axes}"
    )
    for _, axis, value, _ in matches:
        assert value in IMP95_ALLOWED_VALUES, (
            f"IMP-95 {axis} value {value!r} outside allowed set {IMP95_ALLOWED_VALUES}"
        )


def test_imp95_markers_isolated_from_imp91_updater() -> None:
    """`update_board_text` (IMP-91) MUST NOT rewrite IMP-95 markers — distinct closing tag."""
    sample = (
        "<!-- IMP-95:j1 -->trace-only<!-- /IMP-95 --> "
        "<!-- IMP-91:F0:01 -->?<!-- /IMP-91 -->"
    )
    outcomes = {("F0", "01"): "PASS"}
    rewritten = usb.update_board_text(sample, outcomes)
    assert "<!-- IMP-95:j1 -->trace-only<!-- /IMP-95 -->" in rewritten
    assert "<!-- IMP-91:F0:01 -->PASS<!-- /IMP-91 -->" in rewritten


def test_imp95_marker_rewrite_is_idempotent() -> None:
    """Regex-driven IMP-95 cell rewrite is byte-identical on second application."""
    board = "<!-- IMP-95:j1 -->pending<!-- /IMP-95 -->"

    def rewrite(text: str, value: str) -> str:
        return IMP95_MARKER_RE.sub(
            lambda m: f"{m.group(1)}{value}{m.group(4)}", text
        )

    once = rewrite(board, "trace-only")
    twice = rewrite(once, "trace-only")
    assert once == twice == "<!-- IMP-95:j1 -->trace-only<!-- /IMP-95 -->"