import importlib.util
import sys
import threading
from pathlib import Path
from wsgiref.simple_server import WSGIRequestHandler, make_server

import pytest

from audit_core.ingestion import IngestionApplication
from audit_core.senders import SenderIdentity, SenderRegistry
from audit_core.sqlite_backend import SQLiteAuditBackend


SCRIPT = Path(__file__).parents[1] / "scripts" / "t02_synthetic_load_driver.py"
SPEC = importlib.util.spec_from_file_location("t02_synthetic_load_driver", SCRIPT)
assert SPEC and SPEC.loader
DRIVER = importlib.util.module_from_spec(SPEC)
sys.modules[SPEC.name] = DRIVER
SPEC.loader.exec_module(DRIVER)


def environment(tmp_path):
    token = tmp_path / "token"
    token.write_text("opaque-test-value\n", encoding="utf-8")
    token.chmod(0o600)
    return {
        "AUDIT_T02_BASE_URL": "http://audit-core.test:8080",
        "AUDIT_T02_TOKEN_FILE": str(token),
        "AUDIT_T02_TENANT": "tenant:trial:recovery-20260822",
        "AUDIT_T02_SOURCE": "audit-core-recovery",
        "AUDIT_T02_FIXTURE_ID": "audit-t02-recovery-20260822",
        "AUDIT_T02_OCCURRED_AT": "2026-08-22T18:30:00Z",
        "AUDIT_T02_MAX_ATTEMPTS": "4",
        "AUDIT_T02_RETRY_INTERVAL_SECONDS": "0",
    }


def test_baseline_returns_exact_value_safe_shape(tmp_path):
    result = DRIVER.run_phase(
        "baseline",
        DRIVER.CONTRACT_ID,
        env=environment(tmp_path),
        requester=lambda config: (202, "accepted"),
    )
    assert result == {
        "contract_id": DRIVER.CONTRACT_ID,
        "fixture_id": "audit-t02-recovery-20260822",
        "status": "ready",
        "secret_values_observed": False,
    }


def test_unavailable_retries_only_retryable_statuses(tmp_path):
    replies = iter([(500, None), (503, None)])
    result = DRIVER.run_phase(
        "expect-unavailable",
        DRIVER.CONTRACT_ID,
        env=environment(tmp_path),
        requester=lambda config: next(replies),
    )
    assert result["status"] == "retryable_unavailable"
    assert result["http_status"] == 503
    assert result["attempts"] == 2
    assert set(result) == {
        "contract_id", "fixture_id", "status", "http_status", "attempts",
        "secret_values_observed",
    }


@pytest.mark.parametrize("status", [400, 401, 403, 409])
def test_terminal_status_is_never_retried(tmp_path, status):
    attempts = 0

    def terminal(config):
        nonlocal attempts
        attempts += 1
        return status, None

    with pytest.raises(DRIVER.DriverError, match="terminal HTTP status"):
        DRIVER.run_phase(
            "expect-unavailable",
            DRIVER.CONTRACT_ID,
            env=environment(tmp_path),
            requester=terminal,
        )
    assert attempts == 1


def test_recovered_reports_duplicate_after_retry(tmp_path):
    replies = iter([(503, None), (200, "duplicate")])
    result = DRIVER.run_phase(
        "expect-recovered",
        DRIVER.CONTRACT_ID,
        env=environment(tmp_path),
        requester=lambda config: next(replies),
    )
    assert result["status"] == "duplicate"
    assert result["http_status"] == 200
    assert result["attempts"] == 2


def test_cleanup_needs_no_bearer_and_retains_immutable_fixture(tmp_path):
    env = {"AUDIT_T02_FIXTURE_ID": "audit-t02-recovery-20260822"}
    result = DRIVER.run_phase("cleanup", DRIVER.CONTRACT_ID, env=env)
    assert result == {
        "contract_id": DRIVER.CONTRACT_ID,
        "fixture_id": "audit-t02-recovery-20260822",
        "status": "clean",
        "secret_values_observed": False,
    }


def test_private_mounted_bearer_is_required(tmp_path):
    env = environment(tmp_path)
    Path(env["AUDIT_T02_TOKEN_FILE"]).chmod(0o644)
    config = DRIVER.load_config(env)
    with pytest.raises(DRIVER.DriverError, match="private and regular"):
        DRIVER.request_event(config)


def test_payload_is_synthetic_and_never_contains_bearer(tmp_path):
    env = environment(tmp_path)
    config = DRIVER.load_config(env)
    payload = DRIVER.event_payload(config)
    assert payload["data"] == {
        "exercise": "RAILIANCE-WP-0024-T02",
        "synthetic": True,
    }
    assert "opaque-test-value" not in repr(payload)


def test_wrong_contract_is_refused_without_reading_token(tmp_path):
    env = {"AUDIT_T02_FIXTURE_ID": "audit-t02-recovery-20260822"}
    with pytest.raises(DRIVER.DriverError, match="not approved"):
        DRIVER.run_phase("cleanup", "some-other-contract", env=env)


class QuietHandler(WSGIRequestHandler):
    def log_message(self, format, *args):
        pass


def test_real_receiver_accepts_then_reconciles_the_same_fixture(tmp_path):
    env = environment(tmp_path)
    registry = SenderRegistry([
        SenderIdentity(
            name="t02-recovery",
            tokens=("opaque-test-value",),
            sources=frozenset({env["AUDIT_T02_SOURCE"]}),
            tenants=frozenset({env["AUDIT_T02_TENANT"]}),
        )
    ])
    app = IngestionApplication(
        SQLiteAuditBackend(str(tmp_path / "events.db")), registry
    )
    server = make_server("127.0.0.1", 0, app, handler_class=QuietHandler)
    worker = threading.Thread(target=server.serve_forever, daemon=True)
    worker.start()
    env["AUDIT_T02_BASE_URL"] = f"http://127.0.0.1:{server.server_port}"
    try:
        config = DRIVER.load_config(env)
        assert DRIVER.request_event(config) == (202, "accepted")
        assert DRIVER.request_event(config) == (200, "duplicate")
    finally:
        server.shutdown()
        worker.join(timeout=5)