import test from "node:test";
import assert from "node:assert/strict";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { promisify } from "node:util";
import { execFile as callback } from "node:child_process";
import { planStructure, applyStructure, resumeStructure, type StructuralRequest } from "../src/capability-language/structural-plan.js";
const execFile = promisify(callback);

test("structural plans validate the graph, journal originals, and reject stale edits", async (context) => {
  const root = await fs.mkdtemp(path.join(os.tmpdir(), "qx-structural-test-"));
  context.after(() => fs.rm(root, {recursive: true, force: true}));
  await execFile("git", ["-C", root, "init"]);
  await fs.writeFile(path.join(root, ".gitignore"), ".quixos/\n");
  await fs.writeFile(path.join(root, "quixos.lock"), `quixos-lock version 1 { quixos source { repository "https://example.test/quixos.git"; commit "${"a".repeat(40)}"; } }`);
  const before = `workspace Test id "workspace:test" revision "workspace:test@1" commit "${"b".repeat(40)}" { atom Subject id "atom:subject"; }`;
  await fs.writeFile(path.join(root, "workspace.qx"), before);
  const request: StructuralRequest = {kind: "workspace", files: [{file: "workspace.qx", edits: [{operation: "append", parent: {kind: "workspaceDecl"}, source: 'atom Game id "atom:game";'}]}]};
  const plan = await planStructure(root, request);
  assert.equal(await fs.readFile(path.join(root, "workspace.qx"), "utf8"), before);
  await fs.writeFile(path.join(root, "workspace.qx"), `${before}\n// newer edit`);
  await assert.rejects(() => applyStructure(plan), /Stale scaffold/);
  await fs.writeFile(path.join(root, "workspace.qx"), before);
  const applied = await applyStructure(plan);
  assert.equal(applied.phase, "complete");
  assert.ok((await fs.readFile(path.join(root, "workspace.qx"), "utf8")).includes("atom Game"));
  const journal = JSON.parse(await fs.readFile(applied.journalPath, "utf8"));
  assert.equal(journal.changes[0].before, before);
  assert.equal((await resumeStructure(root, applied.id)).phase, "complete");
  // Simulate a process interrupted after one file was written, before recording
  // completion. Replay accepts the already-written exact after image.
  journal.phase = "prepared";
  await fs.writeFile(applied.journalPath, JSON.stringify(journal));
  assert.equal((await resumeStructure(root, applied.id)).phase, "complete");
  await assert.rejects(() => planStructure(root, request), /Duplicate|duplicate/);
  // Cross-repository edits may temporarily refer to an unfinished provider.
  const provisional: StructuralRequest = {kind: "workspace", validation: "syntax", files: [{file: "workspace.qx", edits: [
    {operation: "import", kind: "interface", name: "NotImplementedYet"},
  ]}]};
  const draft = await planStructure(root, provisional);
  assert.equal(draft.validation, "syntax");
  await applyStructure(draft);
  assert.match(await fs.readFile(path.join(root, "workspace.qx"), "utf8"), /import interface NotImplementedYet/);
  await assert.rejects(() => planStructure(root, {...provisional, validation: "resource-graph"}));
});