#!/usr/bin/env python3
"""Structural + value parity check for the tracker-go read API vs the Python service.

Run on the server (loopback access to both, plus `docker exec dereth-db` for the
offline-character exact-match check):
    python3 compare_endpoints.py

Most live endpoints can't be value-equal byte-for-byte (the firehose updates
between fetches), so we assert:
  * status code + top-level key-set parity for every read endpoint, and
  * EXACT equality of /character-stats and /combat-stats for *offline*
    characters (where Python also falls back to the DB, like Go). For online
    characters Python serves a richer live in-memory overlay that Phase-1 Go
    intentionally lacks (no ingest yet) — that difference is expected.
"""
import json
import subprocess
import sys
import urllib.error
import urllib.parse
import urllib.request

PY = "http://127.0.0.1:8765"
GO = "http://127.0.0.1:8770"


def get(base, path):
    try:
        with urllib.request.urlopen(base + path, timeout=12) as r:
            return r.status, json.load(r)
    except urllib.error.HTTPError as e:
        return e.code, None
    except Exception as e:  # noqa: BLE001
        return "ERR:" + str(e)[:40], None


def topkeys(d):
    if isinstance(d, dict):
        return sorted(d.keys())
    if isinstance(d, list):
        return ["[list]"]
    return [type(d).__name__]


def main():
    failures = 0
    _, live = get(PY, "/live")
    ch = live["players"][0]["character_name"] if live and live.get("players") else "Nobody"
    chq = urllib.parse.quote(ch)
    print(f"sample online character: {ch}\n")

    endpoints = [
        "/total-rares", "/total-kills", "/server-health", "/portals",
        "/spawns/heatmap?hours=2", "/combat-stats", "/inventories",
        "/quest-status", "/vital-sharing/peers",
        f"/stats/{chq}", f"/combat-stats/{chq}",
        f"/inventory/{chq}/search", "/sets/list", "/inventory-characters",
    ]
    print(f"{'endpoint':<36} {'py':>5} {'go':>5}  keys")
    for ep in endpoints:
        ps, pj = get(PY, ep)
        gs, gj = get(GO, ep)
        pk, gk = topkeys(pj), topkeys(gj)
        ok = ps == gs and pk == gk
        if not ok:
            failures += 1
        print(f"{ep:<36} {str(ps):>5} {str(gs):>5}  {'OK' if ok else 'MISMATCH py=%s go=%s' % (pk, gk)}")

    # Online-overlay endpoints: only structural note (expected to differ for online chars).
    for ep in (f"/character-stats/{chq}", f"/equipment-cantrip-state/{chq}"):
        ps, _ = get(PY, ep)
        gs, _ = get(GO, ep)
        print(f"{ep:<36} {str(ps):>5} {str(gs):>5}  (online live-overlay; exact match only for offline chars)")

    # Offline-character exact-match check.
    print("\n-- offline-character exact match (/character-stats, /combat-stats) --")
    try:
        online = {p["character_name"] for p in live["players"]}
        names = subprocess.check_output(
            ["docker", "exec", "dereth-db", "psql", "-U", "postgres", "-d", "dereth",
             "-tA", "-c", "SELECT character_name FROM character_stats"], text=True)
        off = [n for n in names.split("\n") if n.strip() and n not in online]
        tested = matched = 0
        for ch in off:
            q = urllib.parse.quote(ch)
            _, py = get(PY, f"/character-stats/{q}")
            _, go = get(GO, f"/character-stats/{q}")
            if not (isinstance(py, dict) and len(py.keys()) >= 18):
                continue
            tested += 1
            same = py == go
            matched += same
            if not same:
                failures += 1
                print(f"   MISMATCH {ch}: keydiff={set(py) ^ set(go)}")
            if tested >= 8:
                break
        print(f"   {matched}/{tested} rich offline chars exact-match")
        if tested == 0:
            print("   (no offline rich characters available to test)")
    except Exception as e:  # noqa: BLE001
        print(f"   (skipped DB-backed offline check: {e})")

    print("\n" + ("RESULT: read-API parity OK" if failures == 0
                  else f"RESULT: {failures} mismatch(es)"))
    return 1 if failures else 0


if __name__ == "__main__":
    sys.exit(main())