// sx-test-runner.js — Run test.sx in the browser using sx-browser.js.
// Loaded on the /specs/testing page. Uses the Sx global.
(function() {
  var NIL = Sx.NIL;
  function isNil(x) { return x === NIL || x === null || x === undefined; }
  function deepEqual(a, b) {
    if (a === b) return true;
    if (isNil(a) && isNil(b)) return true;
    if (typeof a !== typeof b) return false;
    if (Array.isArray(a) && Array.isArray(b)) {
      if (a.length !== b.length) return false;
      for (var i = 0; i < a.length; i++) if (!deepEqual(a[i], b[i])) return false;
      return true;
    }
    if (a && typeof a === "object" && b && typeof b === "object") {
      var ka = Object.keys(a), kb = Object.keys(b);
      if (ka.length !== kb.length) return false;
      for (var j = 0; j < ka.length; j++) if (!deepEqual(a[ka[j]], b[ka[j]])) return false;
      return true;
    }
    return false;
  }

  window.sxRunTests = function(srcId, outId, btnId) {
    var src = document.getElementById(srcId).textContent;
    var out = document.getElementById(outId);
    var btn = document.getElementById(btnId);

    var stack = [], passed = 0, failed = 0, num = 0, lines = [];

    var env = {
      "try-call": function(thunk) {
        try {
          Sx.eval([thunk], env);
          return { ok: true };
        } catch(e) {
          return { ok: false, error: e.message || String(e) };
        }
      },
      "report-pass": function(name) {
        num++; passed++;
        lines.push("ok " + num + " - " + stack.concat([name]).join(" > "));
      },
      "report-fail": function(name, error) {
        num++; failed++;
        lines.push("not ok " + num + " - " + stack.concat([name]).join(" > "));
        lines.push("  # " + error);
      },
      "push-suite": function(name) { stack.push(name); },
      "pop-suite": function() { stack.pop(); },

      "equal?": function(a, b) { return deepEqual(a, b); },
      "eq?": function(a, b) { return a === b; },
      "boolean?": function(x) { return typeof x === "boolean"; },
      "string-length": function(s) { return String(s).length; },
      "substring": function(s, start, end) { return String(s).slice(start, end); },
      "string-contains?": function(s, n) { return String(s).indexOf(n) !== -1; },
      "upcase": function(s) { return String(s).toUpperCase(); },
      "downcase": function(s) { return String(s).toLowerCase(); },
      "reverse": function(c) { return c ? c.slice().reverse() : []; },
      "flatten": function(c) {
        var r = [];
        for (var i = 0; i < (c||[]).length; i++) {
          if (Array.isArray(c[i])) for (var j = 0; j < c[i].length; j++) r.push(c[i][j]);
          else r.push(c[i]);
        }
        return r;
      },
      "has-key?": function(d, k) { return d && typeof d === "object" && k in d; },
      "append": function(c, x) { return Array.isArray(x) ? (c||[]).concat(x) : (c||[]).concat([x]); },
    };

    try {
      var t0 = performance.now();
      var exprs = Sx.parseAll(src);
      for (var i = 0; i < exprs.length; i++) Sx.eval(exprs[i], env);
      var elapsed = Math.round(performance.now() - t0);
      lines.push("");
      lines.push("1.." + num);
      lines.push("# tests " + (passed + failed));
      lines.push("# pass  " + passed);
      if (failed > 0) lines.push("# fail  " + failed);
      lines.push("# time  " + elapsed + "ms");
    } catch(e) {
      lines.push("");
      lines.push("FATAL: " + (e.message || String(e)));
    }

    out.textContent = lines.join("\n");
    out.style.display = "block";
    btn.textContent = passed + "/" + (passed + failed) + " passed" + (failed === 0 ? "" : " (" + failed + " failed)");
    btn.className = failed > 0
      ? "px-4 py-2 rounded-md bg-red-600 text-white font-medium text-sm cursor-default"
      : "px-4 py-2 rounded-md bg-green-600 text-white font-medium text-sm cursor-default";
  };
})();