#!/usr/bin/env python3
"""test_offline_queue.py — H2: writes survive an outage; cold start degrades to cache.

Phase 1 — vault DOWN: `put` / `append` are queued (exit 0, "queued"), not lost.
Phase 2 — vault UP:   `flush` replays them idempotently; the writes land.
Phase 3 — vault UP:   `load` caches the orientation reads.
Phase 4 — vault DOWN: `load` serves the last-known-good cache and says OFFLINE.

Drives the real echo.py against eval/mock_olrapi.py. No creds, no live vault.
Run:  python test_offline_queue.py [--port 8840]
"""
from __future__ import annotations

import argparse
import os
import subprocess
import sys
import tempfile
import time
import urllib.request
from pathlib import Path

HERE = Path(__file__).resolve().parent
ECHO = HERE.parent / "echo-memory.plugin.src" / "skills" / "echo-memory" / "scripts" / "echo.py"
KEY = "test-key-not-a-real-secret"
DEAD = "http://127.0.0.1:59998"   # nothing listens here -> connection refused

failures = []


def check(name, cond, detail=""):
    print(f"{'ok  ' if cond else 'FAIL'} {name}" + (f"  -- {detail}" if not cond else ""))
    if not cond:
        failures.append(name)


def http(method, url, body=None):
    data = body.encode() if isinstance(body, str) else body
    req = urllib.request.Request(url, data=data, method=method,
                                 headers={"Authorization": f"Bearer {KEY}"})
    try:
        with urllib.request.urlopen(req, timeout=10) as r:
            return r.status, r.read().decode("utf-8", "replace")
    except Exception as e:  # noqa: BLE001
        return getattr(e, "code", 0), ""


def tmp(content):
    f = tempfile.NamedTemporaryFile("w", suffix=".md", delete=False, encoding="utf-8")
    f.write(content); f.close()
    return f.name


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--port", type=int, default=8840)
    a = ap.parse_args()
    mock_base = f"http://127.0.0.1:{a.port}"
    state = tempfile.mkdtemp()

    def echo(base, *args):
        env = dict(os.environ, ECHO_BASE=base, ECHO_KEY=KEY, ECHO_STATE_DIR=state,
                   ECHO_VERIFY="0", ECHO_TODAY="2026-06-22")
        return subprocess.run([sys.executable, str(ECHO), *args], capture_output=True, text=True, env=env)

    def start_mock():
        p = subprocess.Popen([sys.executable, str(HERE / "mock_olrapi.py"), "--port", str(a.port)],
                             stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True)
        for _ in range(50):
            try:
                urllib.request.urlopen(f"{mock_base}/__debug__reset", data=b"", timeout=1); break
            except Exception:
                time.sleep(0.1)
        return p

    def ground(path):
        _, body = http("GET", f"{mock_base}/__debug__?path={path}")
        return None if body == "<<MISSING>>" else body

    srv = None
    try:
        # --- Phase 1: vault DOWN -> writes are queued, not lost ------------------
        r = echo(DEAD, "put", "_agent/sessions/2026-06-22-1200-x.md", tmp("EVALMARK-session\n"))
        check("offline put exits 0 (queued)", r.returncode == 0, r.stderr)
        check("offline put reports queued", "queued (offline)" in r.stdout, r.stdout)
        r = echo(DEAD, "append", "inbox/captures/inbox.md", "- 2026-06-22: EVALMARK-inbox")
        check("offline append reports queued", "queued (offline)" in r.stdout, r.stdout)
        outbox = Path(state) / "outbox.ndjson"
        check("two writes are persisted to the outbox",
              outbox.exists() and len(outbox.read_text(encoding="utf-8").splitlines()) == 2)

        # --- Phase 2: vault UP -> flush replays them -----------------------------
        srv = start_mock()
        r = echo(mock_base, "flush")
        check("flush replays the queue", "flushed 2" in r.stdout, r.stdout + r.stderr)
        check("queued PUT landed in the vault", (ground("_agent/sessions/2026-06-22-1200-x.md") or "").find("EVALMARK-session") >= 0)
        check("queued APPEND landed in the vault", "EVALMARK-inbox" in (ground("inbox/captures/inbox.md") or ""))
        check("outbox is empty after a clean flush", not outbox.exists() or not outbox.read_text(encoding="utf-8").strip())

        # idempotent replay: a second flush of the same content must not duplicate.
        echo(DEAD, "append", "inbox/captures/inbox.md", "- 2026-06-22: EVALMARK-inbox")  # re-queue same line
        echo(mock_base, "flush")
        inbox = ground("inbox/captures/inbox.md") or ""
        check("replay is idempotent (no duplicate line)", inbox.count("EVALMARK-inbox") == 1, inbox)

        # --- Phase 3: vault UP -> load caches the orientation reads ---------------
        http("PUT", f"{mock_base}/vault/_agent/echo-vault.md", "schema_version: 4\nEVALMARK-marker\n")
        r = echo(mock_base, "load")
        check("online load shows marker", "EVALMARK-marker" in r.stdout, r.stdout)
        check("load wrote a cache dir", (Path(state) / "cache").exists())

        # --- Phase 4: vault DOWN -> load serves the cache ------------------------
        srv.terminate(); srv.wait(timeout=5); srv = None
        r = echo(DEAD, "load")
        check("offline load flags OFFLINE", "OFFLINE" in r.stdout, r.stdout)
        check("offline load serves cached marker", "EVALMARK-marker" in r.stdout, r.stdout)

        print(f"\n{len(failures)} failure(s)" if failures else "\nall offline-queue tests passed")
        return 1 if failures else 0
    finally:
        if srv:
            srv.terminate()


if __name__ == "__main__":
    raise SystemExit(main())