"""期权持仓展示(实例页 / 中控快照共用)."""
from __future__ import annotations

from typing import Any

from lib.options.options_db import init_options_tables
from lib.options.options_history_lib import enrich_position_row_display
from lib.options.options_pricing_lib import estimate_close_by_bids, intrinsic_px_per_unit


def _safe_float(v: Any) -> float | None:
    if v is None or v == "":
        return None
    try:
        return float(v)
    except (TypeError, ValueError):
        return None


def attach_close_preview(
    cfg: dict[str, Any],
    ex: Any,
    row: dict[str, Any],
    *,
    sheets: int | None = None,
    premium_paid: float | None = None,
) -> dict[str, Any]:
    inst_id = str(row.get("inst_id") or row.get("instId") or "").strip()
    if not inst_id:
        return row
    ct_mult = float(row.get("ct_mult") or 0.01)
    target_sheets = int(sheets) if sheets is not None else int(abs(_safe_float(row.get("pos")) or 0))
    paid = premium_paid if premium_paid is not None else _safe_float(row.get("premium_paid"))
    book = cfg["fetch_option_book_depth"](ex, inst_id, 5)
    row["bid_depth"] = book.get("bids") or []
    row["ask_depth"] = book.get("asks") or []
    mark_px = _safe_float(row.get("mark_px") or row.get("markPx"))
    intrinsic = intrinsic_px_per_unit(
        row.get("opt_type") or row.get("optType"),
        _safe_float(row.get("strike") or row.get("stk")),
        _safe_float(row.get("idx_px") or row.get("idxPx")),
    )
    row["close_preview"] = estimate_close_by_bids(
        row["bid_depth"],
        target_sheets,
        ct_mult=ct_mult,
        premium_paid=paid,
        mark_px=mark_px,
        intrinsic_px=intrinsic,
    )
    return row


def build_display_option_positions(
    cfg: dict[str, Any],
    ex: Any,
    raw_positions: list[dict[str, Any]],
) -> list[dict[str, Any]]:
    """与实例 /api/options/positions 相同 enrichment + close_preview."""
    meta_cache: dict[str, dict[str, Any] | None] = {}
    rows: list[dict[str, Any]] = []
    conn = cfg["get_db"]()
    try:
        init_options_tables(conn)
        for p in raw_positions:
            inst = str(p.get("instId") or "").strip()
            premium_override = None
            if inst:
                rec = conn.execute(
                    """
                    SELECT premium_paid FROM options_trades
                    WHERE inst_id = ? AND status = 'open'
                    ORDER BY id DESC LIMIT 1
                    """,
                    (inst,),
                ).fetchone()
                if rec and rec["premium_paid"] is not None:
                    premium_override = float(rec["premium_paid"])
            row = enrich_position_row_display(
                cfg,
                ex,
                p,
                meta_cache=meta_cache,
                premium_override=premium_override,
            )
            attach_close_preview(cfg, ex, row, premium_paid=_safe_float(row.get("premium_paid")))
            rows.append(row)
    finally:
        conn.close()
    return rows