"""Hosted-scale conformance suite (WP-0006-T08).

Extends WP-0002's offline conformance suite (`tests/test_*.py`, 36 tests)
to run against the actual hosted service, per the task's own three
requirements:

1. the golden Phase example (`examples/phase-001/`) replayed through the
   hosted API end-to-end, not only the offline library;
2. multiple concurrent Phases across different Licensors, isolated from
   one another;
3. a standing regression check that hosted and offline folds of the same
   exported ledger always agree — generalized here across several ledger
   shapes (development-credit, remission-credit, credit-reversal,
   administrative corrections), not just the golden fixture's own shape.

Same ephemeral, disposable Postgres-via-Docker pattern as the other hosted
test modules (never the shared state-hub instance).
"""

from __future__ import annotations

import shutil
import subprocess
import time
import uuid
from pathlib import Path

import pytest

psycopg = pytest.importorskip("psycopg")
pytest.importorskip("fastapi")
from fastapi.testclient import TestClient  # noqa: E402

from conftest import golden_entries, golden_extension, golden_manifest  # noqa: E402

REPO_ROOT = Path(__file__).resolve().parents[1]
MIGRATIONS = [
    REPO_ROOT / "migrations" / "0001_registries.sql",
    REPO_ROOT / "migrations" / "0002_ledger.sql",
    REPO_ROOT / "migrations" / "0003_attestations.sql",
    REPO_ROOT / "migrations" / "0004_breach_records.sql",
]
EXTENSION_NAMES = [
    "development-license",
    "cost-plus-operations",
    "phase-sponsorship",
    "service-with-development-allocation",
]

pytestmark = pytest.mark.skipif(
    shutil.which("docker") is None, reason="docker not available"
)


@pytest.fixture(scope="module")
def pg_container():
    name = f"trf-test-pg-conformance-{uuid.uuid4().hex[:8]}"
    subprocess.run(
        [
            "docker", "run", "--rm", "-d",
            "--name", name,
            "-e", "POSTGRES_PASSWORD=postgres",
            "-e", "POSTGRES_DB=target_revenue_test",
            "-p", "127.0.0.1::5432",
            "postgres:16-alpine",
        ],
        check=True, capture_output=True,
    )
    try:
        port_out = subprocess.run(
            ["docker", "port", name, "5432/tcp"], check=True, capture_output=True, text=True
        ).stdout.strip()
        host_port = port_out.split(":")[-1]
        dsn = f"host=127.0.0.1 port={host_port} dbname=target_revenue_test user=postgres password=postgres"

        for _ in range(60):
            try:
                with psycopg.connect(dsn, connect_timeout=1):
                    break
            except psycopg.OperationalError:
                time.sleep(0.5)
        else:
            raise RuntimeError("postgres container did not become ready in time")

        with psycopg.connect(dsn) as conn:
            for migration in MIGRATIONS:
                conn.execute(migration.read_text(encoding="utf-8"))
                conn.commit()
            for token, licensor_id in [
                ("test-token-repo-a", "coulomb-loop"),
                ("test-token-repo-b", "net-kingdom"),
            ]:
                conn.execute(
                    "INSERT INTO licensors (token, licensor_id) VALUES (%s, %s)",
                    (token, licensor_id),
                )
            conn.commit()

        app_dsn = (
            f"host=127.0.0.1 port={host_port} dbname=target_revenue_test "
            f"user=trf_app password=changeme-in-deployment"
        )
        yield {"app_dsn": app_dsn, "token_a": "test-token-repo-a", "token_b": "test-token-repo-b"}
    finally:
        subprocess.run(["docker", "stop", name], capture_output=True)


@pytest.fixture()
def client(pg_container, monkeypatch):
    monkeypatch.setenv("TRF_DATABASE_URL", pg_container["app_dsn"])
    monkeypatch.setenv("TRF_SIGNING_KEY_HEX", "33" * 32)
    from target_revenue.service import app as app_module

    if hasattr(app_module.app.state, "pool"):
        app_module.app.state.pool.close()
        del app_module.app.state.pool
    if hasattr(app_module.app.state, "signing_key"):
        del app_module.app.state.signing_key
    with TestClient(app_module.app) as c:
        yield c


def auth(token: str) -> dict[str, str]:
    return {"Authorization": f"Bearer {token}"}


def test_golden_phase_replayed_through_hosted_api_matches_offline_library(client, pg_container):
    """Requirement 1: the golden Phase example, replayed through the
    hosted API rather than the offline library, must reproduce exactly
    the outcomes tests/test_conversion.py and tests/test_ledger_fold.py
    already established offline (Development Credit 67000, Remission
    Credit 33000, Outstanding Target 0, future_license MIT)."""
    from target_revenue import conversion, fold

    manifest = golden_manifest()
    manifest["phase"]["id"] = manifest["phase"]["id"] + "-conformance-golden-" + uuid.uuid4().hex[:6]
    phase_id = manifest["phase"]["id"]

    resp = client.post("/phases", json=manifest, headers=auth(pg_container["token_a"]))
    assert resp.status_code == 201, resp.text

    for name in EXTENSION_NAMES:
        ext = golden_extension(name)
        ext_resp = client.post("/extensions", json=ext, headers=auth(pg_container["token_a"]))
        # Extensions are shared/global, not per-Phase — a second replay in
        # the same test session would collide; accept both outcomes here.
        assert ext_resp.status_code in (201, 422)

    for entry in golden_entries():
        submitted = {k: v for k, v in entry.items() if k not in ("previous_entry_hash", "signature")}
        submitted["phase"] = phase_id
        entry_resp = client.post(f"/phases/{phase_id}/ledger", json=submitted, headers=auth(pg_container["token_a"]))
        assert entry_resp.status_code == 201, entry_resp.text

    exported_entries = client.get(f"/phases/{phase_id}/ledger").json()
    hosted_result = fold.fold_outstanding_target(
        manifest["phase"]["initial_target"]["amount"], exported_entries
    )

    offline_manifest = golden_manifest()
    offline_status = conversion.conversion_status(offline_manifest, golden_entries())

    assert hosted_result.development_credit == offline_status.development_credit == 67000
    assert hosted_result.remission_credit == offline_status.remission_credit == 33000
    assert hosted_result.outstanding_target == offline_status.outstanding_target == 0
    assert hosted_result.is_converted is offline_status.is_converted is True

    attestation_resp = client.get(f"/phases/{phase_id}/attestation")
    assert attestation_resp.status_code == 200
    hosted_attestation = attestation_resp.json()
    assert hosted_attestation["final_development_credit"] == 67000
    assert hosted_attestation["final_remission_credit"] == 33000
    assert hosted_attestation["final_outstanding_target"] == 0
    assert hosted_attestation["future_license"] == "MIT"
    assert hosted_attestation["ledger_checkpoint"] == golden_entries()[-1]["id"]


def test_multiple_concurrent_phases_across_different_licensors_are_isolated(client, pg_container):
    """Requirement 2: two Phases, belonging to two different Licensors
    (standing in for two different product-line repos, e.g. coulomb-loop
    and net-kingdom), operate concurrently without cross-contamination —
    each Licensor's writes and reads only ever affect its own Phase."""
    manifest_a = golden_manifest()
    manifest_a["phase"]["id"] = "trsl:phase:conformance-repo-a-" + uuid.uuid4().hex[:6]
    manifest_a["phase"]["initial_target"]["amount"] = 10000

    manifest_b = golden_manifest()
    manifest_b["phase"]["id"] = "trsl:phase:conformance-repo-b-" + uuid.uuid4().hex[:6]
    manifest_b["phase"]["initial_target"]["amount"] = 20000

    assert client.post("/phases", json=manifest_a, headers=auth(pg_container["token_a"])).status_code == 201
    assert client.post("/phases", json=manifest_b, headers=auth(pg_container["token_b"])).status_code == 201

    def entry(phase_id: str, entry_id: str, amount: float) -> dict:
        return {
            "id": entry_id,
            "phase": phase_id,
            "type": "development-credit",
            "amount": amount,
            "currency": "USD",
            "recognized_at": "2026-08-01T00:00:00Z",
            "evidence_reference": f"confidential:evidence:{entry_id}",
            "extension": {"id": "trsl:extension:development-license", "version": "1.0"},
        }

    # Interleaved appends across both Phases, simulating concurrent
    # multi-repo activity rather than strictly sequential per-Phase use.
    a1 = client.post(
        f"/phases/{manifest_a['phase']['id']}/ledger",
        json=entry(manifest_a["phase"]["id"], "trsl:entry:conformrepoa0001", 3000),
        headers=auth(pg_container["token_a"]),
    )
    b1 = client.post(
        f"/phases/{manifest_b['phase']['id']}/ledger",
        json=entry(manifest_b["phase"]["id"], "trsl:entry:conformrepob0001", 5000),
        headers=auth(pg_container["token_b"]),
    )
    a2 = client.post(
        f"/phases/{manifest_a['phase']['id']}/ledger",
        json=entry(manifest_a["phase"]["id"], "trsl:entry:conformrepoa0002", 2000),
        headers=auth(pg_container["token_a"]),
    )
    assert a1.status_code == b1.status_code == a2.status_code == 201

    # Cross-Licensor writes are rejected (isolation, not just non-interference).
    cross = client.post(
        f"/phases/{manifest_a['phase']['id']}/ledger",
        json=entry(manifest_a["phase"]["id"], "trsl:entry:conformrepoacross", 1),
        headers=auth(pg_container["token_b"]),
    )
    assert cross.status_code == 422

    metrics_a = client.get(f"/phases/{manifest_a['phase']['id']}/metrics").json()
    metrics_b = client.get(f"/phases/{manifest_b['phase']['id']}/metrics").json()

    assert metrics_a["facts"]["cumulative_development_credit"] == 5000
    assert metrics_b["facts"]["cumulative_development_credit"] == 5000  # only b1 applied to B
    assert metrics_a["facts"]["outstanding_target"] == 5000
    assert metrics_b["facts"]["outstanding_target"] == 15000

    ledger_a = client.get(f"/phases/{manifest_a['phase']['id']}/ledger").json()
    ledger_b = client.get(f"/phases/{manifest_b['phase']['id']}/ledger").json()
    assert {e["id"] for e in ledger_a} == {"trsl:entry:conformrepoa0001", "trsl:entry:conformrepoa0002"}
    assert {e["id"] for e in ledger_b} == {"trsl:entry:conformrepob0001"}


@pytest.mark.parametrize(
    "plan",
    [
        [("development-credit", 1000), ("development-credit", 500)],
        [("development-credit", 2000), ("remission-credit", 300)],
        [("development-credit", 5000), ("credit-reversal", 1000)],
        [
            ("development-credit", 4000),
            ("administrative-correction-development", 250),
            ("administrative-correction-remission", 100),
        ],
    ],
    ids=["credits-only", "with-remission", "with-reversal", "with-admin-corrections"],
)
def test_hosted_and_offline_fold_always_agree(client, pg_container, plan):
    """Requirement 3, generalized: for several distinct ledger shapes (not
    only the golden fixture's own), appending through the hosted API and
    folding the export offline must reproduce exactly the same
    Development Credit, Remission Credit, and Outstanding Target the plan
    implies by construction."""
    from target_revenue import fold, hashing

    manifest = golden_manifest()
    manifest["phase"]["id"] = "trsl:phase:conformance-plan-" + uuid.uuid4().hex[:8]
    manifest["phase"]["initial_target"]["amount"] = 100000
    phase_id = manifest["phase"]["id"]

    assert client.post("/phases", json=manifest, headers=auth(pg_container["token_a"])).status_code == 201

    expected_dev = 0.0
    expected_rem = 0.0
    for i, (entry_type, amount) in enumerate(plan, start=1):
        e = {
            "id": f"trsl:entry:conformplan{uuid.uuid4().hex[:6]}{i:02d}",
            "phase": phase_id,
            "type": entry_type,
            "amount": amount,
            "currency": "USD",
            "recognized_at": f"2026-08-{i:02d}T00:00:00Z",
            "evidence_reference": f"confidential:evidence:plan-{i}",
        }
        if entry_type in ("development-credit", "remission-credit"):
            e["extension"] = {"id": "trsl:extension:development-license", "version": "1.0"}
        if entry_type == "credit-reversal":
            e["reverses"] = "trsl:entry:conformplanseed"
        resp = client.post(f"/phases/{phase_id}/ledger", json=e, headers=auth(pg_container["token_a"]))
        assert resp.status_code == 201, resp.text

        if entry_type == "development-credit":
            expected_dev += amount
        elif entry_type == "remission-credit":
            expected_rem += amount
        elif entry_type == "credit-reversal":
            expected_dev -= amount
        elif entry_type == "administrative-correction-development":
            expected_dev += amount
        elif entry_type == "administrative-correction-remission":
            expected_rem += amount

    exported = client.get(f"/phases/{phase_id}/ledger").json()
    hashing.verify_chain(exported)
    result = fold.fold_outstanding_target(manifest["phase"]["initial_target"]["amount"], exported)

    assert result.development_credit == expected_dev
    assert result.remission_credit == expected_rem
    assert result.outstanding_target == max(
        0.0, manifest["phase"]["initial_target"]["amount"] - expected_dev - expected_rem
    )