const test = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const path = require("node:path");

const source = fs.readFileSync(path.join(
  __dirname,
  "..",
  "..",
  "src",
  "MBN_STOCK_WEBVIEW.LegacyParityApp",
  "MainWindow.Playout.cs"), "utf8");
const preflight = source.slice(
  source.indexOf("private async Task<LegacyOperatorPlayoutRequest> CreateFreshPagedPlayoutRequestAsync("),
  source.indexOf("private async Task<LegacyOperatorSnapshot> ExecuteGateAPrepareAsync("));

test("first PREPARE and TAKE IN preflight only the selected forward-enabled PageN row", () => {
  assert.ok((source.match(/CreateFreshPagedPlayoutRequestAsync\(/g) || []).length >= 3);
  assert.match(preflight,
    /Skip\(Math\.Max\(0, request\.SelectedIndexZeroBased\)\)[\s\S]*FirstOrDefault\(static entry => entry\.IsEnabled\)/u);
  assert.match(preflight,
    /PreflightPagePlansAsync\([\s\S]*Array\.AsReadOnly\(new\[\] \{ targetEntry \}\)/u);
  assert.doesNotMatch(preflight, /foreach \(var entry in/u);
  assert.doesNotMatch(preflight, /catch \(LegacySceneDataException\)/u);
  assert.match(preflight,
    /ReflectSuccessfulPlayout\([\s\S]*plan\.EntryId,[\s\S]*pageIndexZeroBased: 0,[\s\S]*plan\.PageCount,[\s\S]*synchronizeOperatorSelection: false\)/u);
});

test("the selected PageN preflight is strictly validated before vendor dispatch", () => {
  assert.match(preflight, /plans\.Count != 1/u);
  assert.match(preflight, /!string\.Equals\(plan\.EntryId, targetEntry\.EntryId, StringComparison\.Ordinal\)/u);
  assert.match(preflight, /plan\.PageSize != \(int\)expectedPageSize/u);
  assert.match(preflight, /plan\.PageCount is < 1 or > ScenePaging\.MaximumPageCount/u);
  assert.match(preflight, /workflow\.State\.CurrentEntryId is not null/u);
});