/* Pactsprig app: agreement picker, guided Cover Page form, live preview, PDF / DOCX / print, saved companies,
 * presets and backup. Everything stays in this browser. © 2026 CyberMax. All rights reserved. */
(function () {
  "use strict";
  var C = window.PactCore, P = window.PactPDF, D = window.PactDOCX, X = window.CMXPro;
  var KEY = "pactsprig:v1", FREE_PDFS = 3;
  var AGREEMENTS = [
    { id: "mnda", name: "Mutual NDA", desc: "Protect what both sides share", free: true },
    { id: "psa", name: "Professional Services", desc: "Key Terms + Statement of Work", free: false },
    { id: "design-partner", name: "Design Partner", desc: "Early access for feedback", free: false },
  ];
  var tpls = {}, state, tpl, model, renderTimer;
  function $(id) { return document.getElementById(id); }
  function pro() { return X.isPro(); }
  function toast(m) { X.toast(m); }
  function upsell(msg, from) { X.upsell(msg || "That is part of Pactsprig Pro.", from); }
  function esc(s) { return String(s == null ? "" : s).replace(/[&<>"]/g, function (c) { return { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;" }[c]; }); }
  function agreementInfo(id) { return AGREEMENTS.filter(function (a) { return a.id === id; })[0] || AGREEMENTS[0]; }
  function partiesEmpty() { return state.parties.every(function (p) { return !((p.company || "") + (p.name || "")).trim(); }); }
  function allowed() { return agreementInfo(state.agreement).free || pro(); }

  /* ---------- storage ---------- */
  function load() {
    var s = null;
    try { s = JSON.parse(localStorage.getItem(KEY) || "null"); } catch (e) { s = null; }
    if (!s || typeof s !== "object") s = { fresh: true };
    s.agreement = agreementInfo(s.agreement).id;
    s.docs = s.docs || {};
    s.parties = Array.isArray(s.parties) && s.parties.length === 2 ? s.parties : [C.emptyParty(), C.emptyParty()];
    s.savedParties = Array.isArray(s.savedParties) ? s.savedParties : [];
    s.presets = Array.isArray(s.presets) ? s.presets : [];
    s.page = s.page === "A4" ? "A4" : "Letter";
    return s;
  }
  function save() {
    try { var c = Object.assign({}, state); delete c.fresh; localStorage.setItem(KEY, JSON.stringify(c)); } catch (e) { /* private mode */ }
  }

  function getTpl(id) {
    if (tpls[id]) return Promise.resolve(tpls[id]);
    return fetch("templates/" + id + ".json").then(function (r) { if (!r.ok) throw new Error("template " + id); return r.json(); }).then(function (t) { tpls[id] = t; return t; });
  }

  /* ---------- picker ---------- */
  function renderPicker() {
    $("picker").innerHTML = AGREEMENTS.map(function (a) {
      return '<button type="button" role="radio" data-agreement="' + a.id + '" aria-checked="' + (a.id === state.agreement) + '"><b>' + esc(a.name) + "</b><span>" + esc(a.desc) + "</span>" +
        (a.free ? '<i class="tag free">Free</i>' : '<i class="tag pro">Pro</i>') + "</button>";
    }).join("");
  }
  $("picker").addEventListener("click", function (e) {
    var b = e.target.closest("button[data-agreement]");
    if (!b) return;
    switchTo(b.getAttribute("data-agreement"));
  });
  $("picker").addEventListener("keydown", function (e) {
    if (["ArrowRight", "ArrowLeft", "ArrowDown", "ArrowUp"].indexOf(e.key) < 0) return;
    var i = AGREEMENTS.findIndex(function (a) { return a.id === state.agreement; }), d = e.key === "ArrowRight" || e.key === "ArrowDown" ? 1 : -1;
    var next = AGREEMENTS[(i + d + AGREEMENTS.length) % AGREEMENTS.length].id;
    e.preventDefault();
    switchTo(next).then(function () { var b = document.querySelector('[data-agreement="' + next + '"]'); if (b) b.focus(); });
  });

  function switchTo(id, useExample) {
    return getTpl(id).then(function (t) {
      state.agreement = id; tpl = t;
      var doc = state.docs[id], ex = C.example(t, C.isoToday());
      if (useExample === "blank") { state.docs[id] = { values: C.defaults(t, C.isoToday()) }; state.demo = false; }
      else if (useExample === true || (!doc && (state.demo || state.fresh || partiesEmpty()))) {
        // examples come with their own parties; keep the user's real parties if they typed some
        state.docs[id] = { values: ex.values };
        if (useExample === true || state.demo || state.fresh || partiesEmpty()) { state.parties = ex.parties; state.demo = true; }
      } else if (!doc) state.docs[id] = { values: C.defaults(t, C.isoToday()) };
      else {
        // add any keys a newer template introduced
        if (state.demo) state.parties = ex.parties;
        var dv = C.defaults(t, C.isoToday());
        Object.keys(dv).forEach(function (k) { if (!(k in doc.values)) doc.values[k] = dv[k]; });
      }
      if (!agreementInfo(id).free && !pro()) toast(t.name + " is part of Pro. You can fill it in and preview it; downloads need Pro.");
      renderPicker(); renderParties(); renderForm(); renderPreview(); save();
    }).catch(function (err) { if (window.console) console.warn(err); toast("Could not load that agreement. Check your connection and try again."); });
  }

  /* ---------- parties ---------- */
  function renderParties() {
    var roles = tpl.partyRoles || tpl.parties || ["Party 1", "Party 2"];
    [0, 1].forEach(function (i) {
      $("pl-" + i).textContent = roles[i];
      ["company", "name", "title", "address"].forEach(function (f) { var el = $("p" + i + "-" + f); if (el !== document.activeElement) el.value = state.parties[i][f] || ""; });
    });
    var opts = '<option value="">Saved companies…</option>' + state.savedParties.map(function (p, i) { return '<option value="' + i + '">' + esc(p.company || p.name) + "</option>"; }).join("");
    Array.prototype.forEach.call(document.querySelectorAll("select[data-load-party]"), function (s) { s.innerHTML = opts; s.hidden = !state.savedParties.length; });
  }
  document.querySelector(".parties").addEventListener("input", function (e) {
    var el = e.target, i = el.getAttribute("data-party"), f = el.getAttribute("data-field");
    if (i == null || !f) return;
    state.parties[+i][f] = el.value;
    state.demo = false;
    schedule();
  });
  document.querySelector(".parties").addEventListener("click", function (e) {
    var b = e.target.closest("[data-save-party]");
    if (!b) return;
    if (!pro()) return upsell("Saved companies are part of Pro: save a company once and fill it into any agreement.", "parties");
    var p = Object.assign({}, state.parties[+b.getAttribute("data-save-party")]);
    if (!(p.company || "").trim()) return toast("Type the company name first.");
    var at = state.savedParties.findIndex(function (q) { return (q.company || "").toLowerCase() === p.company.toLowerCase(); });
    if (at > -1) state.savedParties[at] = p; else state.savedParties.push(p);
    save(); renderParties(); renderPresets();
    toast("Saved " + p.company + ".");
  });
  document.querySelector(".parties").addEventListener("change", function (e) {
    var s = e.target.closest("select[data-load-party]");
    if (!s || s.value === "") return;
    if (!pro()) { s.value = ""; return upsell(null, "parties"); }
    var p = state.savedParties[+s.value];
    if (p) { state.parties[+s.getAttribute("data-load-party")] = Object.assign(C.emptyParty(), p); renderParties(); renderPreview(); save(); }
    s.value = "";
  });

  /* ---------- cover page form ---------- */
  function inputFor(key, spec, vals, label) {
    var v = vals[key] == null ? "" : vals[key], id = "v-" + key.replace(/[^A-Za-z0-9]+/g, "-");
    var aria = ' aria-label="' + esc(label) + '"';
    if (spec.k === "sel") return '<select id="' + id + '" data-key="' + esc(key) + '"' + aria + ">" + spec.o.map(function (o) { return "<option" + (o === v ? " selected" : "") + ">" + esc(o) + "</option>"; }).join("") + "</select>";
    if (spec.k === "date") return '<input type="date" id="' + id + '" data-key="' + esc(key) + '" value="' + esc(v) + '"' + aria + ">";
    if (spec.k === "area") return '<textarea id="' + id + '" class="wide" rows="4" data-key="' + esc(key) + '" placeholder="' + esc(spec.ph || "") + '"' + aria + ">" + esc(v) + "</textarea>";
    var num = spec.k === "num";
    return '<input id="' + id + '" class="inl' + (num ? " num" : "") + '" data-key="' + esc(key) + '" value="' + esc(v) + '"' + (num ? ' inputmode="decimal"' : "") + ' placeholder="' + esc(spec.ph || "") + '" style="--w:' + (spec.w || 12) + 'ch"' + aria + ">";
  }
  /** Option text with its inline inputs: "Expires {years} year(s)" -> text + <input>. */
  function inline(t, key, ins, vals, label) {
    return String(t).replace(/\{(@?\w+)\}|([^{]+)/g, function (m, name, txt) {
      if (txt) return '<span class="ot">' + esc(txt) + "</span>";
      if (name.charAt(0) === "@") return '<span class="ot glob">' + esc(name === "@p1" ? "[Party 1 company]" : name === "@p2" ? "[Party 2 company]" : "[Key Terms Effective Date]") + "</span>";
      return ins && ins[name] ? inputFor(key + "." + name, ins[name], vals, label + " " + name) : esc(m);
    });
  }
  function optionsHtml(pgId, row, vals) {
    var k = pgId + ":" + row.id, name = "r-" + k.replace(/[^A-Za-z0-9]+/g, "-");
    var html = row.lead ? '<p class="lead">' + esc(row.lead) + "</p>" : "";
    function subs(o, ok) {
      if (!o.sub) return "";
      return '<div class="subs">' + o.sub.map(function (s) {
        var sk = ok + "." + s.id;
        return '<div class="opt-row"><label class="optl"><input type="checkbox" data-key="' + esc(sk) + '"' + (vals[sk] ? " checked" : "") + "></label><div class=\"opt-body\">" + inline(s.t, sk, s.in, vals, row.label) + "</div></div>";
      }).join("") + "</div>";
    }
    (row.options || []).forEach(function (o) {
      var ok = k + "." + o.id, on = row.type === "choice" ? vals[k] === o.id : !!vals[ok];
      var ctl = row.type === "choice" ? '<input type="radio" name="' + name + '" data-key="' + esc(k) + '" value="' + esc(o.id) + '"' + (on ? " checked" : "") + ">" : '<input type="checkbox" data-key="' + esc(ok) + '"' + (on ? " checked" : "") + ">";
      html += '<div class="opt-row' + (on ? " on" : "") + '"><label class="optl">' + ctl + '</label><div class="opt-body">' + inline(o.t, ok, o.in, vals, row.label) + (on ? subs(o, ok) : "") + "</div></div>";
    });
    if (row.type === "choice" && row.optional) {
      html += '<div class="opt-row' + (!vals[k] ? " on" : "") + '"><label class="optl"><input type="radio" name="' + name + '" data-key="' + esc(k) + '" value=""' + (!vals[k] ? " checked" : "") + '></label><div class="opt-body"><span class="ot muted">None (leave this out)</span></div></div>';
    }
    return html;
  }
  function rowHtml(pg, row, vals) {
    if (row.type === "heading") return '<h3 class="fh">' + esc(row.label) + "</h3>";
    var k = pg.id + ":" + row.id, id = "v-" + k.replace(/[^A-Za-z0-9]+/g, "-");
    var free = row.type === "text" || row.type === "textarea";
    var head = row.omitLabel ? "" : '<div class="fl"><label' + (free ? ' for="' + id + '"' : "") + ">" + esc(row.label) + (row.optional ? ' <span class="opt">optional</span>' : "") + "</label>" + (row.sub ? '<span class="fsub">' + esc(row.sub) + "</span>" : "") + "</div>";
    var body;
    if (row.type === "text" || row.type === "textarea") {
      body = row.type === "text" ? '<input id="' + id + '" data-key="' + esc(k) + '" value="' + esc(vals[k]) + '" placeholder="' + esc(row.ph || "") + '">'
        : '<textarea id="' + id + '" rows="3" data-key="' + esc(k) + '" placeholder="' + esc(row.ph || "") + '">' + esc(vals[k]) + "</textarea>";
    } else if (row.type === "line") body = '<div class="line">' + inline(row.t, k, row.in, vals, row.label) + "</div>";
    else if (row.type === "fixed") body = '<div class="line fixed">' + esc(row.t) + "</div>";
    else body = '<div class="opts" role="group" aria-label="' + esc(row.label || row.lead || "") + '">' + optionsHtml(pg.id, row, vals) + "</div>";
    return '<div class="frow' + (row.omitLabel ? " cont" : "") + '" data-row="' + esc(k) + '">' + head + body + (row.help ? '<p class="help">' + esc(row.help) + "</p>" : "") + "</div>";
  }
  function renderForm() {
    var vals = state.docs[state.agreement].values;
    $("cover-form").innerHTML = tpl.cover.map(function (pg, i) {
      var title = pg.kicker ? (pg.kicker === "SOW" ? "Statement of Work (SOW)" : pg.kicker) : "Cover Page";
      return '<details class="card cover-card" open data-page="' + esc(pg.id) + '"><summary><h2>' + esc(title) + '</h2><span class="step">' + esc(tpl.short || tpl.name) + "</span></summary>" +
        (i === 0 ? '<p class="hint">' + esc(tpl.blurb || "") + "</p>" : "") + pg.rows.map(function (r) { return rowHtml(pg, r, vals); }).join("") + "</details>";
    }).join("");
  }
  function onField(e) {
    var el = e.target, key = el.getAttribute && el.getAttribute("data-key");
    if (!key) return;
    var vals = state.docs[state.agreement].values;
    if (el.type === "checkbox") vals[key] = el.checked;
    else vals[key] = el.value;
    if (el.type === "checkbox" || el.type === "radio") {
      // re-draw this row so nested options appear / disappear
      var rowEl = el.closest(".frow"), rk = rowEl && rowEl.getAttribute("data-row");
      var pgId = rk.split(":")[0], rid = rk.split(":")[1];
      var pg = tpl.cover.filter(function (p) { return p.id === pgId; })[0], row = pg.rows.filter(function (r) { return r.id === rid; })[0];
      var tmp = document.createElement("div");
      tmp.innerHTML = rowHtml(pg, row, vals);
      rowEl.replaceWith(tmp.firstChild);
      var again = document.querySelector('[data-row="' + rk + '"] [data-key="' + key + '"]' + (el.type === "radio" ? '[value="' + el.value + '"]' : ""));
      if (again) again.focus();
    }
    schedule();
  }
  $("cover-form").addEventListener("input", onField);
  $("cover-form").addEventListener("change", function (e) { if (e.target.type === "checkbox" || e.target.type === "radio" || e.target.tagName === "SELECT") onField(e); });

  /* ---------- preview ---------- */
  function schedule() { clearTimeout(renderTimer); renderTimer = setTimeout(function () { renderPreview(); save(); }, 120); }
  function itemHtml(it) {
    var t = esc(it.t).split(esc(C.BLANK)).join('<span class="miss">' + C.BLANK + "</span>");
    return '<div class="d-it' + (it.bullet ? " b" : "") + (it.lead ? " lead" : "") + '" style="--lvl:' + it.lvl + '">' + t + "</div>";
  }
  function runsHtml(b) {
    var h = "";
    if (b.l === 1 && b.h && b.r) h += "<b>" + esc(b.n + " " + b.h) + ".</b> ";
    else if (b.n) h += b.l <= 2 ? "<b>" + esc(b.n) + "</b> " : esc(b.n) + " ";
    if (b.h3) h += "<b>" + esc(b.h3) + "</b> ";
    (b.r || []).forEach(function (r) { h += typeof r === "string" ? esc(r) : r[0] === "b" ? "<b>" + esc(r[1]) + "</b>" : '<span class="v">' + esc(r[1]) + "</span>"; });
    return h;
  }
  function renderPreview() {
    var d = state.docs[state.agreement];
    model = C.build(tpl, { values: d.values, parties: state.parties });
    var h = "";
    model.pages.forEach(function (pg) {
      h += '<section class="d-cover">' + (pg.kicker ? '<div class="d-kicker">' + esc(pg.kicker) + "</div>" : "") + '<h2 class="d-title">' + esc(pg.title) + "</h2>";
      if (pg.intro) h += '<p class="d-intro">' + esc(pg.intro) + "</p>";
      if (pg.lead) h += '<p class="d-lead">' + esc(pg.lead) + "</p>";
      h += '<div class="d-rows">' + pg.rows.map(function (r) {
        if (r.heading) return '<div class="d-head">' + esc(r.heading) + "</div>";
        return '<div class="d-row"><div class="d-l"><b>' + esc(r.label) + "</b>" + (r.sub ? "<small>" + esc(r.sub) + "</small>" : "") + '</div><div class="d-r">' + r.items.map(itemHtml).join("") + "</div></div>";
      }).join("") + "</div>";
      if (pg.closing) h += '<p class="d-closing">' + esc(pg.closing) + "</p>";
      h += '<table class="d-sign"><thead><tr><th></th>' + pg.sign.heads.map(function (x) { return "<th>" + esc(x) + "</th>"; }).join("") + "</tr></thead><tbody>" +
        pg.sign.rows.map(function (r) {
          return '<tr><th scope="row">' + esc(r.label) + (r.note ? "<small>" + esc(r.note) + "</small>" : "") + "</th>" + r.values.map(function (v) { return r.line ? '<td class="sigline"><span></span></td>' : "<td>" + (esc(v) || '<span class="miss">' + C.BLANK + "</span>") + "</td>"; }).join("") + "</tr>";
        }).join("") + "</tbody></table>";
      h += '<p class="d-att">' + esc(model.attribution) + "</p></section>";
    });
    h += '<section class="d-terms"><h2 class="d-tt">' + esc(model.termsTitle) + '</h2><p class="d-tn">' + esc(model.termsNote) + "</p>";
    h += model.terms.map(function (b) {
      if (b.l === 1 && b.h && !b.r) return '<h3 class="d-sec">' + esc(b.n + " " + b.h) + "</h3>";
      return '<p class="d-p l' + b.l + '">' + runsHtml(b) + "</p>";
    }).join("");
    h += '<p class="d-att end"><a href="' + esc(model.termsUrl) + '" target="_blank" rel="noopener">' + esc(model.attribution.replace(/ CC BY 4\.0\.$/, "")) + '</a> <a href="' + esc(model.licenceUrl) + '" target="_blank" rel="noopener">CC BY 4.0</a>.</p>' +
      '<p class="d-src">Standard Terms: ' + esc(model.termsUrl) + " · Licence: " + esc(model.licenceUrl) + "</p></section>";
    h += '<p class="d-credit">' + esc(C.CREDIT) + "</p>";
    if (!allowed()) h += '<div class="d-lock"><p><b>' + esc(tpl.name) + "</b> is part of Pactsprig Pro. Keep filling it in; downloads and printing unlock with Pro ($29 once).</p><button type=\"button\" class=\"btn\" id=\"btn-unlock\">Unlock all agreements</button></div>";
    var docEl = $("doc");
    docEl.innerHTML = h;
    docEl.classList.toggle("locked", !allowed());
    docEl.classList.toggle("a4", state.page === "A4");
    var ul = $("btn-unlock"); if (ul) ul.onclick = function () { upsell(null, "agreement"); };
    $("doc-meta").textContent = tpl.short + " · Version " + tpl.version;
    var w = $("warn");
    w.textContent = model.missing.length ? "Still blank: " + model.missing.slice(0, 4).join(", ") + (model.missing.length > 4 ? " and " + (model.missing.length - 4) + " more" : "") + ". Blank lines print as ________ to fill by hand." : "";
    quotaLine();
  }

  /* ---------- quota + downloads ---------- */
  function quotaLine() {
    var el = $("quota");
    if (pro()) { el.textContent = "Pro: unlimited downloads, Word export, no Pactsprig footer line."; el.className = "quota"; return; }
    if (!agreementInfo(state.agreement).free) { el.textContent = "This agreement is part of Pro. The Mutual NDA is free."; el.className = "quota out"; return; }
    var q = X.quota("pdf", FREE_PDFS);
    el.textContent = q.left > 0 ? q.left + " of " + FREE_PDFS + " free PDFs left this month · printing is free" : "You have used this month's " + FREE_PDFS + " free PDFs. Printing still works, or go Pro for unlimited.";
    el.className = "quota" + (q.left > 0 ? "" : " out");
  }
  function lockedUpsell() { upsell(tpl.name + " is part of Pactsprig Pro, with Word export and unlimited downloads.", "agreement"); }
  function downloadPdf() {
    if (!allowed()) return lockedUpsell();
    var q = X.quota("pdf", FREE_PDFS);
    if (!pro() && q.left <= 0) { quotaLine(); return upsell("You have used this month's " + FREE_PDFS + " free PDFs. Go Pro for unlimited downloads with no footer line.", "pdf-limit"); }
    var bytes;
    try { bytes = P.build(model, { credit: !pro(), page: state.page }); } catch (e) { toast("Sorry, the PDF could not be made: " + e.message); return; }
    q.take();
    X.download(C.fileName(tpl, state.parties, "pdf"), new Blob([bytes], { type: "application/pdf" }));
    quotaLine();
    if (!pro()) {
      $("pro-cta").hidden = false;
      var left = X.quota("pdf", FREE_PDFS).left;
      toast("PDF downloaded. " + (left ? left + " free PDF" + (left === 1 ? "" : "s") + " left this month." : "That was your last free PDF this month."));
    } else toast("PDF downloaded.");
  }
  function downloadDocx() {
    if (!pro()) return upsell("Word (DOCX) export is part of Pro, so you can edit the Cover Page in Word or upload it to your e-signature tool.", "docx");
    var bytes = D.build(model, { page: state.page });
    X.download(C.fileName(tpl, state.parties, "docx"), new Blob([bytes], { type: "application/vnd.openxmlformats-officedocument.wordprocessingml.document" }));
    toast("Word file downloaded.");
  }
  $("btn-pdf").addEventListener("click", downloadPdf);
  $("m-pdf").addEventListener("click", downloadPdf);
  $("btn-docx").addEventListener("click", downloadDocx);
  $("btn-print").addEventListener("click", function () {
    if (!allowed()) return lockedUpsell();
    window.print();
  });
  $("f-page").addEventListener("change", function (e) { state.page = e.target.value === "A4" ? "A4" : "Letter"; save(); renderPreview(); });

  /* ---------- presets, saved companies, backup ---------- */
  function renderPresets() {
    var box = $("presets");
    if (!pro()) {
      box.innerHTML = '<p class="hint">Pro remembers the companies you work with and your usual Cover Page answers (for example “Standard NDA: Delaware, 2 years”), so the next agreement takes seconds.</p><button type="button" class="btn sm" id="btn-presets-pro">Unlock with Pro</button>';
      $("btn-presets-pro").onclick = function () { upsell(null, "presets"); };
      return;
    }
    var mine = state.presets.filter(function (p) { return p.agreement === state.agreement; });
    box.innerHTML = '<h3 class="mini">Cover Page presets for ' + esc(tpl.short) + '</h3><div class="preset-add"><label class="sr" for="f-preset">Preset name</label><input id="f-preset" placeholder="e.g. Standard NDA, Delaware, 2 years"><button type="button" class="btn sm" id="btn-preset-save">Save preset</button></div>' +
      '<div class="chips">' + (mine.length ? mine.map(function (p) { var i = state.presets.indexOf(p); return '<span class="chip"><button type="button" class="chip-load" data-preset="' + i + '">' + esc(p.name) + '</button><button type="button" data-del-preset="' + i + '" aria-label="Delete preset ' + esc(p.name) + '">×</button></span>'; }).join("") : '<span class="hint">No presets yet.</span>') + "</div>" +
      '<h3 class="mini">Saved companies</h3><div class="chips">' + (state.savedParties.length ? state.savedParties.map(function (p, i) { return '<span class="chip"><span>' + esc(p.company) + '</span><button type="button" data-del-party="' + i + '" aria-label="Delete ' + esc(p.company) + '">×</button></span>'; }).join("") : '<span class="hint">Use “Save company” on a party to keep it here.</span>') + "</div>";
  }
  $("presets").addEventListener("click", function (e) {
    var t = e.target;
    if (t.id === "btn-preset-save") {
      var name = ($("f-preset").value || "").trim() || tpl.short + " preset " + (state.presets.length + 1);
      state.presets.push({ name: name, agreement: state.agreement, values: Object.assign({}, state.docs[state.agreement].values) });
      save(); renderPresets(); toast("Preset saved: " + name);
    } else if (t.hasAttribute("data-preset")) {
      var p = state.presets[+t.getAttribute("data-preset")];
      if (p) { state.docs[state.agreement].values = Object.assign(C.defaults(tpl, C.isoToday()), p.values); renderForm(); renderPreview(); save(); toast("Loaded preset: " + p.name); }
    } else if (t.hasAttribute("data-del-preset")) {
      state.presets.splice(+t.getAttribute("data-del-preset"), 1); save(); renderPresets();
    } else if (t.hasAttribute("data-del-party")) {
      state.savedParties.splice(+t.getAttribute("data-del-party"), 1); save(); renderPresets(); renderParties();
    }
  });
  $("btn-backup").addEventListener("click", function () {
    if (!pro()) return upsell("JSON backup is part of Pro.", "backup");
    var c = Object.assign({}, state); delete c.fresh;
    X.download("pactsprig-backup-" + C.isoToday() + ".json", JSON.stringify({ app: "pactsprig", version: 1, saved: new Date().toISOString(), data: c }, null, 1), "application/json");
  });
  $("f-restore").addEventListener("click", function (e) { if (!pro()) { e.preventDefault(); upsell("JSON backup and restore are part of Pro.", "backup"); } });
  $("f-restore").addEventListener("change", function (e) {
    var f = e.target.files && e.target.files[0];
    if (!f) return;
    f.text().then(function (txt) {
      var j = JSON.parse(txt);
      if (!j || j.app !== "pactsprig" || !j.data) throw new Error("not a Pactsprig backup");
      localStorage.setItem(KEY, JSON.stringify(j.data));
      state = load();
      return switchTo(state.agreement).then(function () { renderPresets(); toast("Backup restored."); });
    }).catch(function (err) { toast("Could not restore: " + err.message); });
    e.target.value = "";
  });

  /* ---------- hero buttons ---------- */
  $("btn-example").addEventListener("click", function () { switchTo(state.agreement, true).then(function () { toast("Example loaded. Change anything; the contract updates as you type."); }); });
  $("btn-clear").addEventListener("click", function () {
    state.parties = [C.emptyParty(), C.emptyParty()];
    switchTo(state.agreement, "blank").then(function () { toast("Blank Cover Page. Your saved companies and presets are still here."); });
  });
  $("btn-cta").addEventListener("click", function () { upsell(null, "mid-cta"); });

  /* ---------- Pro on/off ---------- */
  function onPro(on) {
    $("pro-pill").textContent = on ? "Pro ✓" : "Pro";
    if (on) $("pro-cta").hidden = true;
    if (tpl) { renderPreview(); renderPresets(); }
  }

  /* ---------- PWA ---------- */
  var deferred = null;
  window.addEventListener("beforeinstallprompt", function (e) { e.preventDefault(); deferred = e; $("btn-install").hidden = false; });
  $("btn-install").addEventListener("click", function () {
    if (!deferred) return;
    deferred.prompt();
    deferred.userChoice.finally(function () { deferred = null; $("btn-install").hidden = true; });
  });
  if ("serviceWorker" in navigator && (location.protocol === "https:" || /^(localhost|127\.0\.0\.1)$/.test(location.hostname))) {
    window.addEventListener("load", function () { navigator.serviceWorker.register("sw.js").catch(function () { /* offline cache is optional */ }); });
  }

  /* ---------- start ---------- */
  state = load();
  $("f-page").value = state.page;
  renderPicker();
  switchTo(state.agreement).then(function () {
    state.fresh = false;
    X.onChange(onPro);
    document.documentElement.setAttribute("data-ready", "1");
  });
})();