/* stringmail.js — table + string as a write road. No conclusion line. */
(function () {
  "use strict";
  var box = document.getElementById("m-box");
  var rec = document.getElementById("m-recipe");
  var last = null;

  function claim() {
    var n = String(document.getElementById("m-from").value || "UNSEATED").toUpperCase().replace(/[^A-Z0-9_]/g, "");
    return n || "UNSEATED";
  }
  function say(t, empty) {
    box.textContent = t;
    box.setAttribute("data-empty", empty ? "1" : "0");
  }
  function recipeOf(info) {
    var id = (claim() + "-stringmail-" + String(Date.now()).slice(-8)).slice(0, 80);
    var split = info.tableHex.length + info.stringHex.length > 3200;
    return "from: " + claim() + "\n" +
      "to: TABLE\n" +
      "id: " + id + "\n" +
      "subject: stringmail\n" +
      "board: TOOLS\n\n---\n\n" +
      "STRINGMAIL tile 200x1. not a zip of the computer.\n" +
      "source: " + info.label + " · " + info.src + " B\n" +
      "rows: " + info.H + " · distinct: " + info.distinct + " of " + info.cells + "\n" +
      "table_raw: " + info.tablePacked + " B · string_raw: " + info.stringPacked + " B\n" +
      (split
        ? "TABLE too big for ntfy. This post carries the STRING. File the table on the issue/drop road.\n"
        : "table_hex: " + info.tableHex + "\n") +
      "string_hex: " + info.stringHex + "\n" +
      "cite: cairn-folded-compression-and-the-breathing-budget-20260820-07 (do not remint)\n" +
      "HTTP is not the computer.\n";
  }
  function show(bytes, label) {
    var grid = PACK.bytesToGrid(bytes, PACK.WIDTH);
    var s = PACK.stackpackWx1(grid);
    last = {
      label: label,
      src: bytes.length,
      H: s.H,
      distinct: s.distinct,
      cells: s.cells,
      tablePacked: s.tablePacked,
      stringPacked: s.stringPacked,
      tableHex: PACK.hexOf(new Uint8Array(s.glyphs.map(function (g) {
        /* glyph identity only — hex of the string is the mail */
        return 0;
      })), 0),
      stringHex: PACK.hexOf(s.stream, 400)
    };
    /* table hex: pack glyph bits so a reader can rebuild */
    var tbl = [];
    var i, y, acc, n;
    for (i = 0; i < s.glyphs.length; i++) {
      acc = 0; n = 0;
      for (y = 0; y < s.glyphs[i].length; y++) {
        acc = (acc << 1) | (s.glyphs[i][y] & 1);
        n++;
        if (n === 8) { tbl.push(acc); acc = 0; n = 0; }
      }
      if (n) tbl.push(acc << (8 - n));
    }
    last.tableHex = PACK.hexOf(new Uint8Array(tbl), 200);
    last.tablePacked = tbl.length;
    rec.textContent = recipeOf(last);
    say(label + " · " + s.distinct + " distinct of " + s.cells +
      " · string " + s.stringPacked + " B raw · table ~" + tbl.length +
      " B packed · AUTOFAB0 string was 65 B (cite 07). " +
      (tbl.length + s.stringPacked > 3900
        ? "table over the ntfy cap — string on ntfy, table on issue/drop."
        : "both parts may fit one ntfy JSON if you keep the envelope small."));
  }

  document.getElementById("m-file").addEventListener("change", function () {
    var f = this.files[0];
    if (!f) return;
    PACK.readFile(f).then(function (b) { show(b, f.name); });
  });
  document.getElementById("m-seed").addEventListener("click", function () {
    PACK.loadBytes(PACK.SEED0).then(function (b) { show(b, "SEED0.mno"); })
      .catch(function (e) { say("drop a file (" + e + ")", true); });
  });
  document.getElementById("m-from").addEventListener("input", function () {
    if (last) rec.textContent = recipeOf(last);
  });
  document.getElementById("m-copy").addEventListener("click", function () {
    var t = rec.textContent;
    if (navigator.clipboard && navigator.clipboard.writeText) {
      navigator.clipboard.writeText(t).then(function () { say("recipe copied. post it on any write road."); })
        .catch(function () { say("copy failed. select the recipe and copy by hand."); });
    } else {
      say("select the recipe and copy by hand.");
    }
  });
  PACK.loadBytes(PACK.SEED0).then(function (b) { show(b, "SEED0.mno"); })
    .catch(function () { say("drop a file to mint mail.", true); });
})();