#!/usr/bin/env python3
"""Repeat the L77 FI/TN phase census on the L82 passage implementation."""
from __future__ import annotations

import json
import re
import subprocess
import time
from pathlib import Path

ROOT = Path(__file__).resolve().parents[4]
OUT = ROOT / "Saved/Linux/l82/census"
DATA = ROOT / "Standalone/data/owner_world.json"
BINARY = ROOT / "Saved/Linux/l82/profile-bin/VoxelForgeCoreHeadless-clang19"
CAMERAS = {
    "FI": (25.8369140625, 3.19921875, -737.0),
    "TN": (19.166015625, -14.2001953125, -753.3740234375),
}
SAMPLE = re.compile(r"^\[L77Sample\] .*?lod=(\d+) .*?phase=(\S+) .*?weight=(\d+)$", re.M)
SAMPLER = re.compile(r"^\[L77Sampler\] action=stop .*?samples=(\d+).*?status=PASS$", re.M)


def run(world: str, rep: int) -> dict:
    OUT.mkdir(parents=True, exist_ok=True)
    log = OUT / f"l82-phase-{world.lower()}-r{rep}.log"
    camera = ",".join(f"{value:.12f}" for value in CAMERAS[world]) + ",0,0"
    command = [
        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--",
        "env", "VOXELFORGE_L81_PASSAGE_BOUND_PADDING_VOXELS=0", "timeout", "1740s",
        str(BINARY), str(DATA), "--world-assembler-prototype", "--stream-benchmark",
        "--stream-pipeline", "--workers=8", "--clip-radius=3", "--max-clip-level=8",
        "--max-level=8", f"--camera={camera}", "--profile-lod-work", "--linux77-profile",
    ]
    start = time.monotonic()
    with log.open("w", encoding="utf-8") as stream:
        result = subprocess.run(command, cwd=ROOT, stdout=stream,
                                stderr=subprocess.STDOUT, check=False, timeout=1740)
    output = log.read_text(encoding="utf-8", errors="replace")
    matches = [(int(lod), phase, int(weight)) for lod, phase, weight in SAMPLE.findall(output)]
    sampler = SAMPLER.search(output)
    if result.returncode or not matches or sampler is None:
        raise RuntimeError(f"census failed: exit={result.returncode} {log}")
    near = [row for row in matches if row[0] <= 2]
    passage = sum(weight for _, phase, weight in near if phase == "passages")
    total = sum(weight for _, _, weight in near)
    row = {
        "world": world, "replicate": rep, "exit_code": result.returncode,
        "wall_s": round(time.monotonic() - start, 3),
        "sampler_samples": int(sampler.group(1)), "near_lod_samples": len(near),
        "near_lod_weighted_ticks": total, "near_lod_passage_weighted_ticks": passage,
        "near_lod_passage_share_pct": 100.0 * passage / total if total else 0.0,
        "log": str(log.relative_to(ROOT)),
    }
    print("[L82CensusRun] " + json.dumps(row, sort_keys=True), flush=True)
    return row


def main() -> int:
    if not BINARY.is_file() or not DATA.is_file():
        raise SystemExit(f"missing input: {BINARY} or {DATA}")
    rows = [run(world, rep) for world in CAMERAS for rep in (1, 2, 3)]
    by_world = {}
    for world in CAMERAS:
        values = [row["near_lod_passage_share_pct"] for row in rows if row["world"] == world]
        by_world[world] = {"runs_pct": values, "mean_pct": sum(values) / len(values)}
    (OUT / "summary.json").write_text(json.dumps(
        {"runs": rows, "near_lod_passage_share": by_world}, indent=2) + "\n",
        encoding="utf-8")
    return 0


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