#!/usr/bin/env python3
"""Preflight checks for the live Urdu S2S runtime."""

from __future__ import annotations

import argparse
import importlib.util
import json
import os
import sys
from pathlib import Path
from typing import Callable, Mapping


ROOT = Path(__file__).resolve().parents[1]
DEFAULT_AUDIO = ROOT / "data/raw/benchmarks/gemini_urdu_s2s_v1/audio/bench_001.wav"
DEFAULT_VOICE_ANCHOR = ROOT / "data/processed/voice_anchors/chatterbox_praxy_v1/bench_025.wav"


def default_module_available(name: str) -> bool:
    return importlib.util.find_spec(name) is not None


def check_runtime(
    *,
    audio_path: Path,
    voice_prompt_audio_path: Path,
    require_openai_key: bool,
    module_available: Callable[[str], bool] = default_module_available,
    env: Mapping[str, str] = os.environ,
    python_version: tuple[int, int, int] = sys.version_info[:3],
) -> dict[str, object]:
    dependencies = {
        "faster_whisper": "present" if module_available("faster_whisper") else "missing",
        "chatterbox": "present" if module_available("chatterbox") else "missing",
        "soundfile": "present" if module_available("soundfile") else "missing",
    }
    paths = {
        "audio_path": "present" if audio_path.exists() else "missing",
        "voice_prompt_audio_path": "present" if voice_prompt_audio_path.exists() else "missing",
    }
    secrets = {
        "OPENAI_API_KEY": "present" if env.get("OPENAI_API_KEY") else "missing",
    }

    warnings: list[str] = []
    if python_version >= (3, 13, 0):
        warnings.append(
            f"Python {python_version[0]}.{python_version[1]} detected; "
            "ML audio packages are usually safer on Python 3.10-3.12."
        )

    checks = list(dependencies.values()) + list(paths.values())
    if require_openai_key:
        checks.extend(secrets.values())

    return {
        "ok": all(value == "present" for value in checks),
        "python": ".".join(str(part) for part in python_version),
        "dependencies": dependencies,
        "paths": paths,
        "secrets": secrets,
        "warnings": warnings,
    }


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    parser.add_argument("--audio-path", type=Path, default=DEFAULT_AUDIO)
    parser.add_argument("--voice-prompt-audio-path", type=Path, default=DEFAULT_VOICE_ANCHOR)
    parser.add_argument("--no-openai-key-required", action="store_true")
    return parser.parse_args()


def main() -> int:
    args = parse_args()
    report = check_runtime(
        audio_path=args.audio_path,
        voice_prompt_audio_path=args.voice_prompt_audio_path,
        require_openai_key=not args.no_openai_key_required,
    )
    print(json.dumps(report, indent=2, ensure_ascii=False))
    return 0 if report["ok"] else 2


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