#!/usr/bin/env python3
"""Generate deterministic FE-M2 controls/state-panel evidence."""

from __future__ import annotations

import argparse
import hashlib
import json
import subprocess
from pathlib import Path
from typing import Any


CONTEXT = Path("context-lock.json")
FE1 = Path("coverage/frontend-m1.report.json")
DEVICES = Path("coverage/virtual-device-fault-matrix.report.json")
GATE = Path("coverage/release-candidate-gate.report.json")
OUTPUT = Path("coverage/frontend-m2.report.json")
FILES = (Path("web/app/controls.mjs"), Path("web/app/state-panel.mjs"), Path("web/app/app.mjs"), Path("web/app/styles.css"), Path("web/app/test_frontend_m2.mjs"))


def canonical(value: Any) -> str: return json.dumps(value, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
def digest(value: Any) -> str: return hashlib.sha256(canonical(value).encode()).hexdigest()


def artifact(root: Path, path: Path, role: str) -> dict[str, Any]:
    full = root / path
    if not full.is_file(): return {"path": path.as_posix(), "role": role, "status": "missing"}
    return {"path": path.as_posix(), "role": role, "status": "present", "bytes": full.stat().st_size, "sha256": hashlib.sha256(full.read_bytes()).hexdigest()}


def run(root: Path) -> dict[str, Any]:
    result = subprocess.run(["node", "web/app/test_frontend_m2.mjs"], cwd=root, check=False, capture_output=True, text=True)
    return {"status": "passed" if result.returncode == 0 else "blocked", "exit_code": result.returncode, "stdout": result.stdout.strip(), "stdout_sha256": digest(result.stdout), "stderr_sha256": digest(result.stderr)}


def generate(root: Path, output: Path = OUTPUT) -> dict[str, Any]:
    root = root.resolve()
    lock = json.loads((root / CONTEXT).read_text())
    fe1 = json.loads((root / FE1).read_text())
    devices = json.loads((root / DEVICES).read_text())
    gate = json.loads((root / GATE).read_text())
    outputs = [artifact(root, path, "frontend_source") for path in FILES]
    app = (root / "web/app/app.mjs").read_text() if (root / "web/app/app.mjs").is_file() else ""
    controls = (root / "web/app/controls.mjs").read_text() if (root / "web/app/controls.mjs").is_file() else ""
    panel = (root / "web/app/state-panel.mjs").read_text() if (root / "web/app/state-panel.mjs").is_file() else ""
    smoke = run(root)
    actions = ("run", "pause", "resume", "abort", "home", "estop", "recover")
    checks = {
        "fe1_dependency": {"status": "verified" if fe1.get("implementation_status") == "verified" else "blocked"},
        "operation_controls": {"status": "verified" if all(action in controls for action in actions) else "blocked", "actions": list(actions)},
        "authoritative_state_panel": {"status": "verified" if "reduceWorkerState" in panel and "renderStatePanel" in panel and "onMessage" in app else "blocked"},
        "device_error_visibility": {"status": "verified" if devices.get("implementation_status") == "verified" and "Error:" in app else "blocked"},
        "source_files": {"status": "verified" if all(row["status"] == "present" for row in outputs) else "blocked"},
        "browser_smoke": {"status": "verified" if smoke["status"] == "passed" else "blocked", "stdout": smoke["stdout"]},
        "release_stop_preserved": {"status": "verified" if gate.get("release_action") == "STOP_RELEASE" and gate.get("candidate_eligible") is False else "blocked", "release_action": gate.get("release_action")},
    }
    checks_ok = all(row["status"] == "verified" for row in checks.values())
    report: dict[str, Any] = {"schema": "frontend-m2.v1", "context_id": lock.get("context_id"), "task_id": "FE-M2", "status": "partial" if checks_ok else "blocked", "implementation_status": "verified" if checks_ok else "blocked", "candidate_eligible": False, "release_action": "STOP_RELEASE", "inputs": [artifact(root, CONTEXT, "context_lock"), artifact(root, FE1, "frontend_m1"), artifact(root, DEVICES, "virtual_device_fault_matrix"), artifact(root, GATE, "release_candidate_gate")], "outputs": outputs, "checks": checks, "smoke": smoke, "next_transition": "execute FE-M3 project and recovery workflow", "report_sha256": None}
    report["report_sha256"] = digest({key: value for key, value in report.items() if key != "report_sha256"})
    destination = output if output.is_absolute() else root / output
    destination.parent.mkdir(parents=True, exist_ok=True)
    destination.write_text(json.dumps(report, ensure_ascii=False, sort_keys=True, indent=2) + "\n")
    return report


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--repo-root", type=Path, default=Path(__file__).resolve().parents[1])
    parser.add_argument("--output", type=Path, default=OUTPUT)
    args = parser.parse_args()
    report = generate(args.repo_root.resolve(), args.output)
    print(f"frontend_m2={report['status']} smoke={report['checks']['browser_smoke']['status']}")
    return 0


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