/**
 * OKX 对冲计划 P0:行情 + 永期列表 / 期期 T + 情景测算 + 门禁.
 */
(function () {
  const root = document.getElementById("hedge-plan-root");
  if (!root) return;

  const state = {
    mode: "perp_options",
    underlying: root.getAttribute("data-default-underly") || "ETH",
    chain: null,
    selected: null,
    legA: null,
    legB: null,
    market: null,
  };

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

  async function apiJson(url, opts) {
    const res = await fetch(url, Object.assign({ credentials: "same-origin" }, opts || {}));
    const data = await res.json().catch(function () {
      return {};
    });
    if (!res.ok) throw new Error(data.msg || res.statusText || "请求失败");
    return data;
  }

  function fmt(v, d) {
    if (v === null || v === undefined || Number.isNaN(Number(v))) return "—";
    return Number(v).toFixed(d == null ? 2 : d);
  }

  function optTypeForDirection(dir) {
    return dir === "short" ? "C" : "P";
  }

  function syncModeUI() {
    document.querySelectorAll(".hp-mode-btn").forEach(function (b) {
      b.classList.toggle("active", b.getAttribute("data-mode") === state.mode);
    });
    const po = $("hp-po-layout");
    const oo = $("hp-oo-layout");
    if (po) po.classList.toggle("hidden", state.mode !== "perp_options");
    if (oo) oo.classList.toggle("hidden", state.mode !== "options_options");
  }

  function setGateLine(gates) {
    const el = $("hp-gate-line");
    if (!el) return;
    if (!gates) {
      el.textContent = "";
      return;
    }
    const parts = [
      "计仓:" + (gates.is_full_margin ? "全仓" : "非全仓"),
      "测算:" + (gates.can_preview ? "可" : "否"),
      "开仓:" + (gates.can_start ? "可" : "否"),
    ];
    if (gates.reasons && gates.reasons.length) parts.push(gates.reasons.join("; "));
    el.textContent = parts.join(" · ");
    const start = $("hp-start-btn");
    if (start) start.disabled = !gates.can_start;
  }

  async function loadGates() {
    try {
      const d = await apiJson("/api/hedge-plan/gates?plan_type=" + encodeURIComponent(state.mode));
      setGateLine(d);
    } catch (e) {
      setGateLine({ can_preview: false, can_start: false, reasons: [e.message], is_full_margin: false });
    }
  }

  async function loadMarket() {
    const dir = ($("hp-direction") && $("hp-direction").value) || "long";
    const d = await apiJson(
      "/api/hedge-plan/market?base=" +
        encodeURIComponent(state.underlying) +
        "&direction=" +
        encodeURIComponent(dir)
    );
    state.market = d;
    setGateLine(d.gates);
    const q = $("hp-perp-quote");
    if (q) {
      q.innerHTML =
        "标记 <strong>" +
        fmt(d.mark, 2) +
        "</strong> · 最新 " +
        fmt(d.last, 2) +
        " · 卖一 " +
        fmt(d.ask, 2) +
        " · 买一 " +
        fmt(d.bid, 2) +
        "<br/>面值 " +
        fmt(d.contract_size, 4) +
        " · 可用 " +
        fmt(d.available_usdt, 2) +
        " U";
    }
    const sz = $("hp-sizing-line");
    if (sz) {
      if (d.full_margin_sizing) {
        const s = d.full_margin_sizing;
        sz.textContent =
          "全仓建议:保证金 " +
          fmt(s.margin_capital, 2) +
          "U × " +
          s.leverage +
          "x → 名义 " +
          fmt(s.notional_value, 2) +
          "U · 建议约 " +
          fmt(d.suggest_contracts, 4) +
          " 张";
      } else {
        sz.textContent = "非全仓或不具备保证金数据时仅手动填张数;永期开仓需全仓.";
      }
    }
    const entry = $("hp-entry");
    if (entry && d.entry_ref && !entry.value) entry.value = d.entry_ref;
    const contracts = $("hp-contracts");
    if (contracts && d.suggest_contracts != null && !contracts.value) {
      contracts.value = d.suggest_contracts;
    }
    const label = $("hp-opt-type-label");
    if (label) label.textContent = d.suggested_opt_type === "C" ? "Call" : "Put";
  }

  function fillExpSelect(sel, chain) {
    if (!sel) return;
    const prev = sel.value;
    sel.innerHTML = '<option value="">选择到期日</option>';
    (chain.expiries || []).forEach(function (e) {
      const opt = document.createElement("option");
      opt.value = String(e.exp_time);
      const dt = new Date(Number(e.exp_time));
      opt.textContent = dt.toLocaleString();
      sel.appendChild(opt);
    });
    if (prev) sel.value = prev;
    if (!sel.value && chain.expiries && chain.expiries[0]) {
      sel.value = String(chain.expiries[0].exp_time);
    }
  }

  async function loadChain() {
    const d = await apiJson(
      "/api/hedge-plan/options-chain?underlying=" + encodeURIComponent(state.underlying)
    );
    state.chain = d;
    const idx = $("hp-index-line");
    if (idx) idx.textContent = "指数 " + fmt(d.index_px, 2) + " · " + (d.inst_family || "");
    const ooIdx = $("hp-oo-index");
    if (ooIdx) ooIdx.textContent = "指数 " + fmt(d.index_px, 2);
    fillExpSelect($("hp-exp-select"), d);
    fillExpSelect($("hp-oo-exp-select"), d);
    renderListStrikes();
    renderTStrikes();
    if (d.index_px && $("hp-target") && !$("hp-target").value) {
      $("hp-target").value = d.index_px;
    }
  }

  function currentExp(selectId) {
    const sel = $(selectId);
    const expMs = sel && sel.value;
    if (!expMs || !state.chain) return null;
    return (state.chain.expiries || []).find(function (e) {
      return String(e.exp_time) === String(expMs);
    });
  }

  function renderListStrikes() {
    const tbody = $("hp-strike-tbody");
    if (!tbody) return;
    const dir = ($("hp-direction") && $("hp-direction").value) || "long";
    const want = optTypeForDirection(dir);
    const exp = currentExp("hp-exp-select");
    tbody.innerHTML = "";
    if (!exp) {
      tbody.innerHTML = '<tr><td colspan="5" class="muted">请选择到期日</td></tr>';
      return;
    }
    const list = (exp.contracts || []).filter(function (c) {
      return String(c.opt_type || "").toUpperCase() === want;
    });
    if (!list.length) {
      tbody.innerHTML = '<tr><td colspan="5" class="muted">无匹配合约</td></tr>';
      return;
    }
    list.forEach(function (c) {
      const tr = document.createElement("tr");
      tr.innerHTML =
        "<td>" +
        c.strike +
        "</td><td>" +
        c.opt_type +
        "</td><td>" +
        fmt(c.ask, 4) +
        "</td><td>" +
        fmt(c.bid, 4) +
        '</td><td><button type="button" class="btn-secondary hp-pick" data-inst="' +
        c.inst_id +
        '">选用</button></td>';
      tbody.appendChild(tr);
    });
    tbody.querySelectorAll(".hp-pick").forEach(function (btn) {
      btn.addEventListener("click", function () {
        const inst = btn.getAttribute("data-inst");
        const c = list.find(function (x) {
          return x.inst_id === inst;
        });
        if (!c) return;
        state.selected = c;
        const el = $("hp-sel-inst");
        if (el) el.textContent = c.inst_id;
        updatePremiumLine();
      });
    });
  }

  function updatePremiumLine() {
    const line = $("hp-premium-line");
    if (!line || !state.selected) {
      if (line) line.textContent = "";
      return;
    }
    const sheets = Number(($("hp-sheets") && $("hp-sheets").value) || 1);
    const ct = Number(state.selected.ct_mult || 0.01);
    const ask = Number(state.selected.ask || 0);
    const prem = ask * sheets * ct;
    line.textContent = "预估权利金 ≈ " + fmt(prem, 4) + " USDC";
  }

  function buildStraddleRows(contracts) {
    const map = {};
    (contracts || []).forEach(function (c) {
      const key = String(c.strike);
      if (!map[key]) map[key] = { strike: c.strike, call: null, put: null };
      const o = (c.opt_type || "").toUpperCase();
      if (o === "C") map[key].call = c;
      else if (o === "P") map[key].put = c;
    });
    return Object.keys(map)
      .map(function (k) {
        return map[k];
      })
      .sort(function (a, b) {
        return Number(a.strike) - Number(b.strike);
      });
  }

  function renderTStrikes() {
    const tbody = $("hp-oo-tbody");
    if (!tbody) return;
    const exp = currentExp("hp-oo-exp-select");
    tbody.innerHTML = "";
    if (!exp) {
      tbody.innerHTML = '<tr><td colspan="5" class="muted">请选择到期日</td></tr>';
      return;
    }
    const rows = buildStraddleRows(exp.contracts);
    rows.forEach(function (row) {
      const tr = document.createElement("tr");
      const callAsk = row.call ? fmt(row.call.ask, 4) : "—";
      const putAsk = row.put ? fmt(row.put.ask, 4) : "—";
      tr.innerHTML =
        "<td>" +
        callAsk +
        '</td><td>' +
        (row.call
          ? '<button type="button" class="btn-secondary hp-oo-pick" data-side="C" data-inst="' +
            row.call.inst_id +
            '">Call</button>'
          : "—") +
        '</td><td class="opt-t-strike"><strong>' +
        row.strike +
        "</strong></td><td>" +
        putAsk +
        '</td><td>' +
        (row.put
          ? '<button type="button" class="btn-secondary hp-oo-pick" data-side="P" data-inst="' +
            row.put.inst_id +
            '">Put</button>'
          : "—") +
        "</td>";
      tbody.appendChild(tr);
    });
    tbody.querySelectorAll(".hp-oo-pick").forEach(function (btn) {
      btn.addEventListener("click", function () {
        const inst = btn.getAttribute("data-inst");
        const exp2 = currentExp("hp-oo-exp-select");
        const c = (exp2.contracts || []).find(function (x) {
          return x.inst_id === inst;
        });
        if (!c) return;
        if (!state.legA) state.legA = c;
        else if (!state.legB || state.legB.inst_id === state.legA.inst_id) state.legB = c;
        else {
          state.legA = c;
          state.legB = null;
        }
        renderOoLegs();
      });
    });
  }

  function renderOoLegs() {
    const el = $("hp-oo-legs");
    if (!el) return;
    function one(tag, c) {
      if (!c) return tag + ": —";
      return (
        tag +
        ": " +
        c.opt_type +
        " K" +
        c.strike +
        " ask=" +
        fmt(c.ask, 4) +
        " (" +
        c.inst_id +
        ")"
      );
    }
    el.innerHTML = one("腿A", state.legA) + "<br/>" + one("腿B", state.legB);
  }

  function legPayload(c, sheets) {
    return {
      opt_type: c.opt_type,
      strike: c.strike,
      sheets: sheets,
      ct_mult: c.ct_mult || 0.01,
      ask: c.ask,
      inst_id: c.inst_id,
    };
  }

  async function runPreview() {
    const tbody = $("hp-result-tbody");
    const summary = $("hp-summary");
    try {
      let body;
      if (state.mode === "options_options") {
        if (!state.legA || !state.legB) throw new Error("请选用两条期权腿");
        const target = Number(($("hp-target") && $("hp-target").value) || 0);
        if (!target) throw new Error("请填写目标价");
        body = {
          plan_type: "options_options",
          target_price: target,
          index_px: (state.chain && state.chain.index_px) || target,
          leg_a: legPayload(state.legA, 1),
          leg_b: legPayload(state.legB, 1),
        };
      } else {
        if (!state.selected) throw new Error("请选用期权腿");
        const entry = Number(($("hp-entry") && $("hp-entry").value) || 0);
        const tp = Number(($("hp-tp") && $("hp-tp").value) || 0);
        const sl = Number(($("hp-sl") && $("hp-sl").value) || 0);
        const contracts = Number(($("hp-contracts") && $("hp-contracts").value) || 0);
        const sheets = Number(($("hp-sheets") && $("hp-sheets").value) || 1);
        if (!entry || !tp || !sl || !contracts) throw new Error("请完整填写开仓/止盈/止损/张数");
        body = {
          plan_type: "perp_options",
          direction: ($("hp-direction") && $("hp-direction").value) || "long",
          entry: entry,
          tp: tp,
          sl: sl,
          contracts: contracts,
          contract_size: (state.market && state.market.contract_size) || 0.01,
          opt_type: state.selected.opt_type,
          strike: state.selected.strike,
          sheets: sheets,
          ct_mult: state.selected.ct_mult || 0.01,
          ask: state.selected.ask,
          index_px: state.chain && state.chain.index_px,
        };
      }
      const d = await apiJson("/api/hedge-plan/preview", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(body),
      });
      setGateLine(d.gates);
      const s = d.summary || {};
      if (summary) {
        if (d.plan_type === "perp_options") {
          summary.innerHTML =
            "止盈合计 <strong>" +
            fmt(s.tp_total) +
            "</strong> · 止损合计 <strong>" +
            fmt(s.sl_total) +
            "</strong> · 保费 " +
            fmt(s.premium_paid) +
            (s.hedge_ratio_at_sl != null ? " · 止损对冲率 " + fmt(s.hedge_ratio_at_sl) + "%" : "");
        } else {
          summary.innerHTML =
            "目标价合计 <strong>" +
            fmt(s.at_target_total) +
            "</strong> · 到期现价 <strong>" +
            fmt(s.expiry_flat_total) +
            "</strong> · 保费 " +
            fmt(s.premium_paid) +
            (s.expiry_is_loss ? " · 到期无盈利(记总亏损)" : "");
        }
      }
      tbody.innerHTML = "";
      (d.scenarios || []).forEach(function (sc) {
        const tr = document.createElement("tr");
        let mid;
        if (sc.perp_pnl != null) {
          mid = "永续 " + fmt(sc.perp_pnl);
        } else {
          mid = "A " + fmt(sc.leg_a_pnl) + " / B " + fmt(sc.leg_b_pnl);
        }
        const optCol = sc.options_pnl != null ? fmt(sc.options_pnl) : "—";
        tr.innerHTML =
          "<td>" +
          (sc.label || sc.id) +
          "</td><td>" +
          fmt(sc.spot) +
          "</td><td>" +
          mid +
          "</td><td>" +
          optCol +
          "</td><td><strong>" +
          fmt(sc.total) +
          "</strong></td><td class=\"muted\">" +
          (sc.note || "") +
          "</td>";
        tbody.appendChild(tr);
      });
    } catch (e) {
      if (tbody) tbody.innerHTML = '<tr><td colspan="6" class="err">' + (e.message || e) + "</td></tr>";
      if (summary) summary.textContent = "";
    }
  }

  function bind() {
    document.querySelectorAll(".hp-mode-btn").forEach(function (b) {
      b.addEventListener("click", function () {
        state.mode = b.getAttribute("data-mode") || "perp_options";
        syncModeUI();
        loadGates();
      });
    });
    document.querySelectorAll(".hp-uly-btn, .hp-uly-btn-oo").forEach(function (b) {
      b.addEventListener("click", function () {
        state.underlying = b.getAttribute("data-uly") || "ETH";
        document.querySelectorAll(".hp-uly-btn, .hp-uly-btn-oo").forEach(function (x) {
          x.classList.toggle("active", x.getAttribute("data-uly") === state.underlying);
        });
        state.selected = null;
        state.legA = null;
        state.legB = null;
        void refreshAll();
      });
    });
    const dir = $("hp-direction");
    if (dir) {
      dir.addEventListener("change", function () {
        void loadMarket().then(function () {
          renderListStrikes();
        });
      });
    }
    if ($("hp-refresh")) $("hp-refresh").addEventListener("click", function () {
      void refreshAll();
    });
    if ($("hp-load-chain")) $("hp-load-chain").addEventListener("click", function () {
      void loadChain();
    });
    if ($("hp-oo-load-chain")) $("hp-oo-load-chain").addEventListener("click", function () {
      void loadChain();
    });
    if ($("hp-exp-select"))
      $("hp-exp-select").addEventListener("change", renderListStrikes);
    if ($("hp-oo-exp-select"))
      $("hp-oo-exp-select").addEventListener("change", renderTStrikes);
    if ($("hp-sheets")) $("hp-sheets").addEventListener("input", updatePremiumLine);
    if ($("hp-preview-btn")) $("hp-preview-btn").addEventListener("click", function () {
      void runPreview();
    });
  }

  async function refreshAll() {
    await loadGates();
    try {
      await loadMarket();
    } catch (e) {
      const q = $("hp-perp-quote");
      if (q) q.textContent = e.message || String(e);
    }
    try {
      await loadChain();
    } catch (e) {
      const tbody = $("hp-strike-tbody");
      if (tbody) tbody.innerHTML = '<tr><td colspan="5" class="err">' + (e.message || e) + "</td></tr>";
    }
  }

  syncModeUI();
  bind();
  void refreshAll();
})();