"""ORCH-110 TC-12: observability of the infra-timeout path (D6 / FR-6 / AC-9).

The infra-timeout state must be (a) reflected in read-only counters, (b) surfaced in
the additive ``merge_gate`` block of ``GET /queue``, and (c) distinguishable from a
code-fault rollback — with the exhaustion alert carrying the CLICKABLE issue number
and an explicitly infrastructural (NOT "developer must fix") wording. No dedup/overlap
with ORCH-111 (which only OBSERVES surviving processes; ORCH-110 prevents/tolerates).
"""
import asyncio
import os
import tempfile

_test_db = os.path.join(tempfile.gettempdir(), "test_orch110_observability.db")
os.environ["ORCH_DB_PATH"] = _test_db
os.environ["ORCH_REPOS_DIR"] = tempfile.gettempdir()
os.environ.setdefault("ORCH_GITEA_TOKEN", "test-token")
os.environ.setdefault("ORCH_PLANE_API_TOKEN", "test-token")

from unittest.mock import MagicMock  # noqa: E402

import pytest  # noqa: E402

import src.db as _db  # noqa: E402
from src.db import init_db, get_db  # noqa: E402
from src import merge_gate  # noqa: E402
from src import stage_engine  # noqa: E402
from src.stage_engine import AdvanceResult  # noqa: E402


@pytest.fixture(autouse=True)
def fresh_db(monkeypatch):
    monkeypatch.setattr(_db.settings, "db_path", _test_db)
    if os.path.exists(_test_db):
        os.unlink(_test_db)
    init_db()
    # Reset the in-process counters so each test starts from a known baseline.
    merge_gate._MERGE_GATE_COUNTERS.update(
        retest_timeout_total=0, retest_infra_retry_total=0,
        retest_infra_exhausted_total=0, retest_skipped_current_total=0,
        last_infra_timeout_wi=None,
    )
    yield


# ---------------------------------------------------------------------------
# merge_gate_status() snapshot + counter increments.
# ---------------------------------------------------------------------------
def test_tc12_status_exposes_flags_and_counters():
    snap = merge_gate.merge_gate_status()
    for key in (
        "infra_tolerance_enabled", "infra_max_retries", "infra_retry_delay_s",
        "skip_when_current_enabled", "tree_kill_enabled", "retest_timeout_s",
        "retest_timeout_total", "retest_infra_retry_total",
        "retest_infra_exhausted_total", "retest_skipped_current_total",
        "last_infra_timeout_wi",
    ):
        assert key in snap, f"missing /queue merge_gate key: {key}"


def test_tc12_counters_track_infra_timeout_distinctly():
    merge_gate.note_retest_timeout("ORCH-110")
    merge_gate.note_retest_infra_retry()
    merge_gate.note_retest_infra_exhausted()
    merge_gate.note_retest_skipped_current()
    snap = merge_gate.merge_gate_status()
    assert snap["retest_timeout_total"] == 1
    assert snap["retest_infra_retry_total"] == 1
    assert snap["retest_infra_exhausted_total"] == 1
    assert snap["retest_skipped_current_total"] == 1
    # Distinguishable from a code-fault: the last infra-timeout WI is tracked here,
    # NOT in the merge-verify (code/merge) counters.
    assert snap["last_infra_timeout_wi"] == "ORCH-110"


def test_tc12_status_never_raises(monkeypatch):
    # A broken settings attribute -> the snapshot degrades, never raises.
    monkeypatch.delattr(merge_gate.settings, "merge_retest_infra_tolerance_enabled", raising=False)
    snap = merge_gate.merge_gate_status()
    assert isinstance(snap, dict)


# ---------------------------------------------------------------------------
# GET /queue carries the additive merge_gate block (and the legacy keys stay).
# ---------------------------------------------------------------------------
def test_tc12_queue_endpoint_includes_merge_gate_block():
    from src.main import queue
    out = asyncio.run(queue())
    assert "merge_gate" in out
    assert "infra_tolerance_enabled" in out["merge_gate"]
    # The pre-existing observability keys are untouched (additive only).
    assert "merge_verify" in out and "coverage" in out


# ---------------------------------------------------------------------------
# The exhaustion alert is INFRA-specific + carries the clickable issue number,
# distinct from the code-fault "Merge-gate still failing after N developer retries".
# ---------------------------------------------------------------------------
def test_tc12_exhaustion_alert_is_infra_specific_and_clickable(monkeypatch):
    sent = {}

    def _tg(msg):
        sent["msg"] = msg

    monkeypatch.setattr(stage_engine, "send_telegram", _tg)
    monkeypatch.setattr(stage_engine, "set_issue_blocked", MagicMock())
    monkeypatch.setattr(stage_engine, "plane_add_comment", MagicMock())
    # link_for builds the clickable number; use a recognisable sentinel.
    monkeypatch.setattr(stage_engine, "link_for", lambda wi, **k: f"<a href='x'>{wi}</a>")
    monkeypatch.setattr(stage_engine.settings, "merge_retest_infra_max_retries", 2)

    # Seed an exhausted budget for the task.
    conn = get_db()
    cur = conn.execute(
        "INSERT INTO tasks (plane_id, work_item_id, repo, branch, stage) VALUES (?,?,?,?,?)",
        ("plane-ORCH-110", "ORCH-110", "orchestrator", "feature/ORCH-110-x", "deploy-staging"),
    )
    task_id = cur.lastrowid
    for _ in range(2):
        conn.execute(
            "INSERT INTO jobs (agent, repo, task_id, task_content) "
            "VALUES ('deployer','orchestrator',?, 'Note: merge-gate infra-timeout retry')",
            (task_id,),
        )
    conn.commit()
    conn.close()

    res = AdvanceResult()
    stage_engine._handle_merge_gate_infra_retry(
        task_id, "deploy-staging", "orchestrator", "ORCH-110",
        "feature/ORCH-110-x", "re-test timeout after 900s", res,
    )
    assert res.note == "merge-gate-infra-retry-exhausted"
    assert "ORCH-110" in sent["msg"]                  # clickable issue number present
    assert "developer retries" not in sent["msg"]     # NOT the code-fault wording
    assert "НЕ дефект кода" in sent["msg"]             # explicitly infrastructural