/**
 * 实例数据统计:复盘 KPI + 已实现盈亏曲线.
 */
(function (global) {
  "use strict";

  var currentRange = "7d";
  var booted = false;

  function $(id) {
    return document.getElementById(id);
  }

  function root() {
    return $("options-data-stats");
  }

  function escapeHtml(s) {
    return String(s == null ? "" : s)
      .replace(/&/g, "&")
      .replace(/</g, "&lt;")
      .replace(/>/g, "&gt;")
      .replace(/"/g, "&quot;");
  }

  function fmtPnl(v) {
    if (v == null || v === "") return "—";
    var n = Number(v);
    if (Number.isNaN(n)) return "—";
    return (n >= 0 ? "+" : "") + n.toFixed(2) + "U";
  }

  function fmtHold(sec) {
    if (sec == null) return "—";
    var s = Math.max(0, Number(sec) || 0);
    if (s < 3600) return Math.round(s / 60) + "m";
    if (s < 86400) return (s / 3600).toFixed(1) + "h";
    return (s / 86400).toFixed(1) + "d";
  }

  function pnlClass(v) {
    var n = Number(v);
    if (Number.isNaN(n) || n === 0) return "";
    return n > 0 ? "ods-pnl-pos" : "ods-pnl-neg";
  }

  function closeReasonLabel(r) {
    var map = {
      perp_tp: "永续止盈",
      perp_sl: "永续止损",
      oo_expiry_loss: "期期到期亏损",
      oo_expiry_win: "期期到期盈利",
      target_win_leg: "期期平盈利腿",
      profit_rr_win_leg: "期期盈亏比达标·平盈利腿",
    };
    return map[r] || String(r || "未填");
  }

  function sourceType() {
    var el = root();
    return (el && el.getAttribute("data-source-type")) || "option_spot";
  }

  function setStatus(text) {
    var el = $("ods-status");
    if (el) el.textContent = text || "";
  }

  function renderGroup(title, items) {
    if (!items || !items.length) return "";
    var lines = items
      .slice(0, 8)
      .map(function (g) {
        var keyLabel =
          title === "对冲结束原因" ? closeReasonLabel(g.key) : String(g.key || "");
        return (
          '<div class="ods-stat-row">' +
          '<span class="ods-stat-key">' +
          escapeHtml(keyLabel) +
          " · " +
          g.count +
          "笔</span>" +
          '<span class="ods-stat-val">' +
          fmtPnl(g.pnl_sum) +
          " / 胜" +
          (g.win_rate || 0) +
          "%</span>" +
          "</div>"
        );
      })
      .join("");
    return (
      '<div class="ods-stat-card"><div class="ods-stat-card-title">' +
      title +
      "</div>" +
      lines +
      "</div>"
    );
  }

  function loadReviewStats() {
    var kpi = $("ods-kpi");
    var groups = $("ods-stats-groups");
    if (!kpi || !groups) return Promise.resolve();
    // 口径 B:期权历史币盈亏×卖回价(/api/options/stats),与复盘账户差分独立
    return fetch("/api/options/stats", { credentials: "same-origin" })
      .then(function (r) {
        return r.json();
      })
      .then(function (data) {
        if (!data || !data.ok) {
          kpi.innerHTML = '<div class="muted" style="font-size:.76rem">统计加载失败</div>';
          groups.innerHTML = "";
          return;
        }
        var unit = data.pnl_unit || "U";
        var net = data.net_realized_pnl;
        var avg =
          data.total_closed > 0 && net != null
            ? Number(net) / Number(data.total_closed)
            : null;
        kpi.innerHTML = [
          ["已平笔数", data.total_closed || 0],
          ["胜率", (data.win_rate || 0) + "%"],
          ["盈亏比", data.profit_loss_ratio != null ? data.profit_loss_ratio : "—"],
          ["累计盈亏", fmtPnl(net)],
          ["平均盈利", data.avg_win != null ? fmtPnl(data.avg_win) : "—"],
          ["平均亏损", data.avg_loss != null ? fmtPnl(-Math.abs(Number(data.avg_loss))) : "—"],
          ["平均持有", fmtHold(data.avg_hold_sec)],
        ]
          .map(function (pair) {
            var cls = "";
            if (pair[0] === "累计盈亏") cls = pnlClass(net);
            if (pair[0] === "平均盈利") cls = "pnl-pos";
            if (pair[0] === "平均亏损") cls = "pnl-neg";
            return (
              '<div class="ods-kpi-tile"><div class="ods-kpi-label">' +
              pair[0] +
              '</div><div class="ods-kpi-value' +
              (cls ? " " + cls : "") +
              '">' +
              pair[1] +
              "</div></div>"
            );
          })
          .join("");
        groups.innerHTML =
          '<div class="muted" style="font-size:.76rem">数据统计口径:期权历史盈亏×平仓卖回价(与复盘账户差分独立)。单位 ' +
          unit +
          (avg != null ? " · 笔均 " + fmtPnl(avg) : "") +
          "</div>";
      })
      .catch(function () {
        kpi.innerHTML = '<div class="muted" style="font-size:.76rem">统计加载失败</div>';
        groups.innerHTML = "";
      });
  }

  function fmtCash(v) {
    if (v == null || Number.isNaN(Number(v))) return "—";
    return Number(v).toFixed(2) + "U";
  }

  function drawCurve(points) {
    var svg = $("ods-curve-svg");
    if (!svg) return;
    var W = 640;
    var H = 240;
    var padL = 48;
    var padR = 12;
    var padT = 16;
    var padB = 28;
    var stroke = getComputedStyle(document.body).getPropertyValue("--accent") || "#5aa0ff";
    stroke = (stroke || "").trim() || "#5aa0ff";
    var grid = "rgba(127,127,127,.22)";
    var muted = "rgba(160,160,180,.75)";

    if (!points || !points.length) {
      svg.innerHTML =
        '<text x="320" y="120" text-anchor="middle" fill="' +
        muted +
        '" font-size="13">暂无已实现盈亏数据</text>';
      return;
    }

    var vals = points.map(function (p) {
      return Number(p.v);
    });
    var ts = points.map(function (p) {
      return Number(p.t);
    });
    var minV = Math.min.apply(null, vals);
    var maxV = Math.max.apply(null, vals);
    if (maxV - minV < 1e-6) {
      minV -= 1;
      maxV += 1;
    }
    var minT = ts[0];
    var maxT = ts[ts.length - 1];
    if (maxT <= minT) maxT = minT + 1;

    function xOf(t) {
      return padL + ((t - minT) / (maxT - minT)) * (W - padL - padR);
    }
    function yOf(v) {
      return padT + (1 - (v - minV) / (maxV - minV)) * (H - padT - padB);
    }

    var path = points
      .map(function (p, i) {
        var x = xOf(p.t);
        var y = yOf(p.v);
        return (i ? "L" : "M") + x.toFixed(1) + "," + y.toFixed(1);
      })
      .join(" ");

    var yTicks = [minV, (minV + maxV) / 2, maxV];
    var gridHtml = yTicks
      .map(function (v) {
        var y = yOf(v);
        return (
          '<line x1="' +
          padL +
          '" y1="' +
          y.toFixed(1) +
          '" x2="' +
          (W - padR) +
          '" y2="' +
          y.toFixed(1) +
          '" stroke="' +
          grid +
          '" stroke-width="1"/>' +
          '<text x="' +
          (padL - 6) +
          '" y="' +
          (y + 4).toFixed(1) +
          '" text-anchor="end" fill="' +
          muted +
          '" font-size="10">' +
          Number(v).toFixed(0) +
          "</text>"
        );
      })
      .join("");

    var last = points[points.length - 1];
    svg.innerHTML =
      gridHtml +
      '<path d="' +
      path +
      '" fill="none" stroke="' +
      stroke +
      '" stroke-width="2" vector-effect="non-scaling-stroke"/>' +
      '<circle cx="' +
      xOf(last.t).toFixed(1) +
      '" cy="' +
      yOf(last.v).toFixed(1) +
      '" r="3.5" fill="' +
      stroke +
      '"/>';
  }

  function loadCashCurve() {
    var meta = $("ods-curve-meta");
    return fetch("/api/instance/cash_curve?range=" + encodeURIComponent(currentRange), {
      credentials: "same-origin",
    })
      .then(function (r) {
        return r.json();
      })
      .then(function (data) {
        if (!data || !data.ok) {
          if (meta) meta.textContent = "曲线加载失败";
          drawCurve([]);
          return;
        }
        var pts = data.points || [];
        drawCurve(pts);
        if (meta) {
          meta.textContent =
            "已实现 " +
            (data.trade_count != null ? data.trade_count + " 笔 · " : "") +
            pts.length +
            " 点 · 累计 " +
            fmtCash(data.latest != null ? data.latest : pts.length ? pts[pts.length - 1].v : null);
        }
      })
      .catch(function () {
        if (meta) meta.textContent = "曲线加载失败";
        drawCurve([]);
      });
  }

  function reloadAll() {
    setStatus("加载中…");
    return Promise.all([loadReviewStats(), loadCashCurve()]).then(function () {
      setStatus("");
    });
  }

  function bindOnce() {
    if (booted || !root()) return;
    booted = true;
    var btn = $("ods-reload-btn");
    if (btn) {
      btn.addEventListener("click", function () {
        reloadAll();
      });
    }
    document.querySelectorAll("#options-data-stats .ods-range-btn").forEach(function (b) {
      b.addEventListener("click", function () {
        currentRange = b.getAttribute("data-range") || "7d";
        document.querySelectorAll("#options-data-stats .ods-range-btn").forEach(function (x) {
          x.classList.toggle("active", x === b);
        });
        loadCashCurve();
      });
    });
    // 默认 7 日更有曲线感;若用户点今日再切
    var def7 = document.querySelector('#options-data-stats .ods-range-btn[data-range="7d"]');
    if (def7) {
      document.querySelectorAll("#options-data-stats .ods-range-btn").forEach(function (x) {
        x.classList.toggle("active", x === def7);
      });
      currentRange = "7d";
    }
    reloadAll();
  }

  function bootIfPresent() {
    if (root()) bindOnce();
  }

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", bootIfPresent);
  } else {
    bootIfPresent();
  }

  // embed 软切 tab 时脚本可能再次插入
  global.__OPTIONS_DATA_STATS_BOOT__ = bootIfPresent;
})(typeof window !== "undefined" ? window : this);