"""实例数据统计:复盘 KPI + 资金曲线 API,以及后台现金采样."""
from __future__ import annotations

from typing import Any, Callable

from flask import Flask, jsonify, request


def install_instance_data_stats(app: Flask, app_module: Any) -> None:
    get_db: Callable = app_module.get_db
    login_required = app_module.login_required

    def _fetch_balances() -> dict[str, Any]:
        ex = getattr(app_module, "exchange_options", None)
        if ex is None:
            return {}
        from lib.exchange.okx_options_lib import fetch_options_balances

        return fetch_options_balances(ex, force=False) or {}

    @app.route("/api/instance/cash_curve")
    @login_required
    def api_instance_cash_curve():
        from lib.instance.instance_cash_sample_lib import (
            query_cash_series_with_db,
            sample_once,
        )

        # 打开页面时尽量补一笔最新点(失败忽略)
        try:
            sample_once(get_db, _fetch_balances)
        except Exception:
            pass
        range_key = (request.args.get("range") or "7d").strip()
        conn = get_db()
        try:
            return jsonify(query_cash_series_with_db(conn, range_key=range_key))
        except Exception as e:
            return jsonify({"ok": False, "msg": f"加载资金曲线失败: {e}"}), 500
        finally:
            conn.close()

    # 后台采样(daemon);无密钥时会空转跳过
    try:
        from lib.instance.instance_cash_sample_lib import start_cash_sample_loop

        start_cash_sample_loop(get_db, _fetch_balances)
    except Exception as e:
        print(f"[instance_cash_sample] start skipped: {e}", flush=True)