"""
Feedback API — pure Python backend, no Streamlit imports.
Called directly from app/feedback.py now; wrappable in a FastAPI route later.
"""
from __future__ import annotations

import platform
import re
import subprocess
from datetime import datetime, timezone
from pathlib import Path

import yaml

_ROOT = Path(__file__).parent.parent
_EMAIL_RE = re.compile(r"[a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}")
_PHONE_RE = re.compile(r"(\+?1[\s\-.]?)?\(?\d{3}\)?[\s\-.]?\d{3}[\s\-.]?\d{4}")


def mask_pii(text: str) -> str:
    """Redact email addresses and phone numbers from text."""
    text = _EMAIL_RE.sub("[email redacted]", text)
    text = _PHONE_RE.sub("[phone redacted]", text)
    return text


def collect_context(page: str) -> dict:
    """Collect app context: page, version, tier, LLM backend, OS, timestamp."""
    # App version from git
    try:
        version = subprocess.check_output(
            ["git", "describe", "--tags", "--always"],
            cwd=_ROOT, text=True, timeout=5,
        ).strip()
    except Exception:
        version = "dev"

    # Tier from user.yaml
    tier = "unknown"
    try:
        user = yaml.safe_load((_ROOT / "config" / "user.yaml").read_text()) or {}
        tier = user.get("tier", "unknown")
    except Exception:
        pass

    # LLM backend from llm.yaml
    llm_backend = "unknown"
    try:
        llm = yaml.safe_load((_ROOT / "config" / "llm.yaml").read_text()) or {}
        llm_backend = llm.get("provider", "unknown")
    except Exception:
        pass

    return {
        "page": page,
        "version": version,
        "tier": tier,
        "llm_backend": llm_backend,
        "os": platform.platform(),
        "timestamp": datetime.now(timezone.utc).isoformat().replace("+00:00", "Z"),
    }