"""Telegram payload builder. Caller (agent-office) handles actual delivery."""

from __future__ import annotations

import datetime as dt

NODE_ICONS = {
    "foreign_buy":  "👤외",
    "volume_surge": "⚡거",
    "momentum":     "🚀모",
    "high52w":      "🆙고",
    "rs_rating":    "💪RS",
    "ma_alignment": "📈MA",
    "vcp_lite":     "🌀VCP",
}

PAGE_BASE = "https://gahusb.synology.me/stock/screener"


def _escape_md(s: str) -> str:
    """Minimal MarkdownV2 escape — extend if formatting breaks."""
    for ch in r"\_*[]()~`>#+-=|{}.!":
        s = s.replace(ch, "\\" + ch)
    return s


def _format_won(n) -> str:
    if n is None:
        return "-"
    return f"{int(n):,}"


def build_telegram_payload(asof: dt.date, mode: str, survivors_count: int,
                           top_n: int, rows: list, run_id) -> dict:
    title = "*KRX 강세주 스크리너*"
    header = (
        f"🎯 {title} — {_escape_md(asof.isoformat())} \\({_escape_md(mode)}\\)\n"
        f"통과 {survivors_count}종 / Top {top_n} / 본문 1\\-10"
    )

    lines = []
    for r in rows[:10]:
        icons = " ".join(
            NODE_ICONS[name] for name, sc in r["scores"].items()
            if sc >= 70 and name in NODE_ICONS
        )
        score_str = f"{r['total_score']:.1f}"
        r_pct = r.get("r_pct")
        r_pct_str = f"{r_pct:.1f}" if r_pct is not None else "-"
        lines.append(
            f"{r['rank']}\\. *{_escape_md(r['name'])}*  `{r['ticker']}`   "
            f"⭐ {_escape_md(score_str)}\n"
            f"   {icons}\n"
            f"   진입 {_format_won(r.get('entry_price'))}  "
            f"손절 {_format_won(r.get('stop_price'))}  "
            f"익절 {_format_won(r.get('target_price'))}   "
            f"\\(R {_escape_md(r_pct_str)}%\\)"
        )

    # URL은 inline link로 감싸 URL 내부 . - ? = 이스케이프 회피
    link = (
        f"🔗 [전체 결과·11\\~20위]({PAGE_BASE}?run_id={run_id})"
        if run_id else ""
    )

    text = header + "\n\n" + "\n\n".join(lines) + ("\n\n" + link if link else "")

    return {
        "chat_target": "default",
        "parse_mode": "MarkdownV2",
        "text": text,
    }