#!/usr/bin/env python3
"""
Parse backend/logs/intent/low_confidence.csv and export a Markdown backlog.
"""
from __future__ import annotations

import argparse
import csv
from collections import defaultdict
from datetime import datetime
from pathlib import Path


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="Export low-confidence intent queries.")
    parser.add_argument(
        "--output-date",
        default=datetime.utcnow().strftime("%Y-%m-%d"),
        help="Ngày (YYYY-MM-DD) dùng cho thư mục báo cáo.",
    )
    return parser.parse_args()


def load_backlog(log_path: Path) -> list[dict[str, str]]:
    if not log_path.exists():
        return []
    rows: list[dict[str, str]] = []
    with log_path.open("r", encoding="utf-8") as fp:
        reader = csv.DictReader(fp)
        for row in reader:
            rows.append(row)
    return rows


def render_markdown(rows: list[dict[str, str]]) -> str:
    lines = [
        "<!-- Auto-generated by export_intent_backlog.py -->",
        "# Backlog truy vấn low-confidence",
        "",
        f"Tổng số mẫu: {len(rows)}",
        "",
    ]
    by_intent: dict[str, list[dict[str, str]]] = defaultdict(list)
    for row in rows:
        by_intent[row.get("intent", "unknown")].append(row)

    for intent, samples in sorted(by_intent.items()):
        lines.append(f"## Intent: {intent} ({len(samples)} mẫu)")
        lines.append("")
        lines.append("| Thời gian | Confidence | Route | Query |")
        lines.append("| --- | --- | --- | --- |")
        for sample in samples[:50]:
            lines.append(
                f"| {sample.get('timestamp','')} | {sample.get('confidence','')} "
                f"| {sample.get('route','')} | {sample.get('query','').strip()} |"
            )
        lines.append("")
    if not by_intent:
        lines.append("_Chưa có dữ liệu._")
    return "\n".join(lines).strip() + "\n"


def main() -> None:
    repo_root = Path(__file__).resolve().parents[2]
    args = parse_args()
    log_path = repo_root / "backend" / "logs" / "intent" / "low_confidence.csv"
    rows = load_backlog(log_path)

    output_dir = repo_root / "tài nguyên" / "báo cáo" / args.output_date / "backend"
    output_dir.mkdir(parents=True, exist_ok=True)
    output_path = output_dir / "intent_backlog.md"
    markdown = render_markdown(rows)
    output_path.write_text(markdown, encoding="utf-8")
    print(f"✅ Wrote {len(rows)} entries to {output_path}")


if __name__ == "__main__":
    main()