import assert from "node:assert/strict";
import crypto from "node:crypto";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { pathToFileURL } from "node:url";
import test from "node:test";
import ts from "typescript";

const root = path.resolve(import.meta.dirname, "../../..");
const temporary = fs.mkdtempSync(path.join(os.tmpdir(), "library-linked-mutation-unit-"));
const transpile = (sourceName, outputName, replacements = []) => {
  const sourcePath = path.join(root, "web/protocol", sourceName);
  const transpiled = ts.transpileModule(fs.readFileSync(sourcePath, "utf8"), {
    compilerOptions: { module: ts.ModuleKind.ES2022, target: ts.ScriptTarget.ES2022 },
    fileName: sourcePath,
    reportDiagnostics: true,
  });
  assert.deepEqual(transpiled.diagnostics, []);
  fs.writeFileSync(path.join(temporary, outputName), replacements.reduce((source, [from, to]) => source.replaceAll(from, to), transpiled.outputText));
};
transpile("capability-gates.ts", "capability-gates.mjs");
transpile("library-linked-mutation.ts", "library-linked-mutation.mjs", [["from \"./capability-gates\"", "from \"./capability-gates.mjs\""]]);
const linked = await import(pathToFileURL(path.join(temporary, "library-linked-mutation.mjs")));
const manifest = JSON.parse(fs.readFileSync(path.join(root, "tests/golden/M12-03G/manifest.json"), "utf8"));
const sha256 = (file) => crypto.createHash("sha256").update(fs.readFileSync(path.join(root, file))).digest("hex");
const base = (operation = "MESH_GEOMETRY") => ({
  schemaVersion: 1,
  operation,
  dataBlockId: "mesh:M12 Link Mesh",
  baseRevision: 7,
  owner: "SOURCE_LIBRARY",
  linkedLibrary: true,
  readOnly: true,
});

test("M12-03G binds the linked writer protocol and evidence artifacts", () => {
  assert.equal(manifest.task, "M12-03G");
  assert.equal(manifest.parentTask, "M12-03F");
  assert.equal(manifest.nextTask, "M12-03H");
  for (const artifact of Object.values(manifest.artifacts)) assert.equal(sha256(artifact.path), artifact.sha256, artifact.path);
});

test("M12-03G blocks every linked data writer with the stable mutation code", () => {
  assert.equal(linked.LINKED_DATA_WRITER_OPERATIONS.length, 6);
  for (const operation of linked.LINKED_DATA_WRITER_OPERATIONS) {
    const gate = linked.gateLinkedDataMutation(base(operation), 7);
    assert.equal(gate.status, "BLOCKED");
    assert.deepEqual(gate.issues.map((issue) => issue.code), ["LINKED_DATA_MUTATION_BLOCKED"]);
    assert.equal(gate.issues[0].recoverable, false);
    assert.deepEqual(linked.parseLinkedDataMutation(base(operation)), { ...base(operation) });
  }
});

test("M12-03G rejects stale, malformed, and ownership-substituted writes before Main", () => {
  assert.equal(linked.gateLinkedDataMutation(base(), 8).issues[0].code, "REVISION_CONFLICT");
  assert.equal(linked.gateLinkedDataMutation({ ...base(), owner: "LOCAL_MAIN", linkedLibrary: false, readOnly: false }, 7).issues[0].code, "LINKED_DATA_MUTATION_BLOCKED");
  assert.equal(linked.gateLinkedDataMutation({ ...base(), future: true }, 7).issues[0].code, "TASK_VALIDATION_FAILED");
  assert.equal(linked.gateLinkedDataMutation({ ...base(), operation: "UNKNOWN" }, 7).issues[0].code, "TASK_VALIDATION_FAILED");
});