"""End-to-end test for the thin scratch driver.

This test wires the shipped ``cyclone.edifabric`` MockTransport seam
to return a clean ``Status: success`` OperationResult and asserts
that the thin driver:

  1. Calls ``select_spot_check_visits`` against an in-memory DB
     fixture (the same in-memory DB pattern as the pipeline tests).
  2. Calls ``write_spot_check_files`` to emit 837P files.
  3. Calls ``validate_spot_check_files`` (the committed module) and
     accepts the success response.
  4. Writes ``spot-check.json`` with 10 entries, each with
     ``passed=true`` and a real ``result.Status == 'success'``.
  5. Writes ``spot-check-summary.txt`` with 10 PASS lines.
  6. Exits with code 0 and prints ``10/10 passed``.

The MockTransport here stands in for the live Edifabric API during
the unit test (the live API is quota-blocked until next UTC
midnight). When quota replenishes, the same driver runs unchanged
against the live API and produces the same evidence shape.
"""
from __future__ import annotations

import csv
import importlib.util
import json
import os
from datetime import date
from pathlib import Path

import httpx
import pytest

import cyclone.edifabric as edifabric
import cyclone.secrets as _secrets
from cyclone import db as db_mod
from cyclone.rebill.visits_store import load_visits_csv

_REAL_GET_SECRET = _secrets.get_secret
_TEST_KEY = "3ecf6b1c5cf34bd797a5f4c57951a1cf"

_X12_INTERCHANGE = {
    "SegmentDelimiter": "~",
    "DataElementDelimiter": "*",
    "ISA": {"InterchangeControlNumber_13": "000000001"},
    "Groups": [],
    "IEATrailers": [],
}

DRIVER_PATH = Path(
    "/tmp/grok-goal-4336f8e1af6d/implementer/build_and_validate.py"
)


def _install_mock(handler, secrets_key: str | None = _TEST_KEY):
    """Install a MockTransport + patched secrets for tests."""
    edifabric.set_transport_factory(
        lambda: httpx.Client(
            transport=httpx.MockTransport(handler), timeout=10.0
        )
    )
    if secrets_key is not None:
        def _fake(name: str):
            if name == "edifabric.api_key":
                return secrets_key
            return _REAL_GET_SECRET(name)
        _secrets.get_secret = _fake  # type: ignore[assignment]


def _restore():
    edifabric._reset_transport_factory()
    _secrets.get_secret = _REAL_GET_SECRET


@pytest.fixture
def visits_csv(tmp_path: Path) -> Path:
    csv_path = tmp_path / "visits.csv"
    with csv_path.open("w", newline="", encoding="utf-8") as f:
        writer = csv.writer(f)
        writer.writerow([
            "Client", "Visit Date", "Payer", "Authorized", "Member ID",
            "Auth Start Date", "Auth End Date", "Authorization #", "ICD-10",
            "Service", "Procedure Code", "Modifiers", "Client Classes",
            "Billable Hours", "Billable Amount", "Invoice #", "Claimed",
        ])
        for i in range(12):
            day = (i % 27) + 1
            month = ((i // 27) % 6) + 1
            writer.writerow([
                f"Patient{i:02d}, Test", f"{month:02d}/{day:02d}/2026",
                "COHCPF", "Yes", f"R{i:06d}",
                "01/01/2026", "12/31/2026", "1", "R69",
                "S5150", "S5150", "U8", "DD", "1",
                f"${200 + i}.00", f"INV-{i}", "Yes",
            ])
    return csv_path


@pytest.fixture(autouse=True)
def _always_restore():
    yield
    _restore()


def _load_driver(scratch: Path):
    """Load the scratch driver as a module with SCRATCH/OUT_DIR/
    EVIDENCE_JSON/EVIDENCE_TXT rebound to ``scratch``.

    Returns the imported module (with .main() available).
    """
    src = DRIVER_PATH.read_text()
    # Replace the constants block with scratch-scoped ones.
    for old, new in [
        ('SCRATCH = Path("/tmp/grok-goal-4336f8e1af6d/implementer")',
         f'SCRATCH = Path("{scratch}")'),
    ]:
        src = src.replace(old, new, 1)
    spec = importlib.util.spec_from_loader(
        "driver_under_test", loader=None,
    )
    mod = importlib.util.module_from_spec(spec)
    exec(compile(src, str(DRIVER_PATH), "exec"), mod.__dict__)
    return mod


def _seed_db(db_path: Path, visits_csv: Path) -> int:
    """Seed a fresh sqlite DB at db_path with visits_csv."""
    if db_path.exists():
        db_path.unlink()
    os.environ["CYCLONE_DB_URL"] = f"sqlite:///{db_path}"
    db_mod._reset_for_tests()
    db_mod.init_db()
    return load_visits_csv(
        visits_csv,
        window_start=date(2026, 1, 1),
        window_end=date(2026, 6, 27),
    )


# --- Tests ----------------------------------------------------------- #


def test_driver_e2e_against_mock_live_edifabric_succeeds(
    tmp_path, visits_csv, capsys
):
    """End-to-end: driver + committed modules + mocked live success →
    exit 0 + '10/10 passed' + 10 live-success entries in evidence.
    """
    db_path = tmp_path / "test.db"
    inserted = _seed_db(db_path, visits_csv)
    assert inserted == 12

    scratch = tmp_path / "scratch"
    scratch.mkdir()

    def handler(request: httpx.Request) -> httpx.Response:
        if request.url.path.endswith("/read"):
            return httpx.Response(200, json=[_X12_INTERCHANGE])
        if request.url.path.endswith("/validate"):
            return httpx.Response(200, json={
                "Status": "success",
                "Details": [],
                "LastIndex": 30,
            })
        raise AssertionError(f"unexpected path: {request.url.path}")

    _install_mock(handler)
    driver = _load_driver(scratch)
    rc = driver.main()

    captured = capsys.readouterr()
    assert rc == 0, (
        f"driver exited {rc}; expected 0\n"
        f"stdout: {captured.out}\nstderr: {captured.err}"
    )
    assert "10/10 passed" in captured.out, (
        f"driver stdout missing '10/10 passed'\n"
        f"stdout: {captured.out}"
    )

    evidence_json = scratch / "spot-check.json"
    evidence_txt = scratch / "spot-check-summary.txt"
    assert evidence_json.exists(), "spot-check.json not written"
    entries = json.loads(evidence_json.read_text())
    assert len(entries) == 10, f"expected 10 entries, got {len(entries)}"
    for e in entries:
        assert e["passed"] is True
        assert e["result"] is not None
        assert e["result"]["Status"] == "success"
        assert e["transport_error"] is None

    summary = evidence_txt.read_text().strip().splitlines()
    assert len(summary) == 10
    for line in summary:
        assert "\tPASS\t" in line
        assert "\tsuccess\t" in line


def test_driver_e2e_against_403_quota_fails_loud(tmp_path, visits_csv, capsys):
    """End-to-end: driver against mocked 403 quota → exit 1, NO '10/10 passed'."""
    db_path = tmp_path / "test.db"
    _seed_db(db_path, visits_csv)

    scratch = tmp_path / "scratch"
    scratch.mkdir()

    def handler(request: httpx.Request) -> httpx.Response:
        return httpx.Response(
            403,
            json={"statusCode": 403,
                  "message": "Out of call volume quota."},
        )

    _install_mock(handler)
    driver = _load_driver(scratch)
    rc = driver.main()

    captured = capsys.readouterr()
    assert "10/10 passed" not in captured.out, (
        f"driver printed fake '10/10 passed' against 403 quota:\n"
        f"stdout: {captured.out}"
    )
    assert rc != 0, (
        f"driver exited 0 against 403 quota — should fail loud\n"
        f"stdout: {captured.out}\nstderr: {captured.err}"
    )

    evidence_json = scratch / "spot-check.json"
    entries = json.loads(evidence_json.read_text())
    assert len(entries) == 10
    for e in entries:
        assert e["passed"] is False
        assert e["transport_error"]["status_code"] == 403
        assert e["result"] is None