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 repoRoot = path.resolve(import.meta.dirname, "../../..");
const temporary = fs.mkdtempSync(path.join(os.tmpdir(), "asset-catalog-migration-unit-"));
const sources = ["asset-path.ts", "capability-gates.ts", "asset-library-io.ts", "asset-catalog-v2.ts", "asset-catalog-migration.ts"];
for (const sourceName of sources) {
  const sourcePath = path.join(repoRoot, "web/protocol", sourceName);
  const result = ts.transpileModule(fs.readFileSync(sourcePath, "utf8"), {
    compilerOptions: { module: ts.ModuleKind.ES2022, target: ts.ScriptTarget.ES2022 },
    fileName: sourcePath,
    reportDiagnostics: true,
  });
  assert.deepEqual(result.diagnostics, []);
  const output = result.outputText.replaceAll(/from "\.\/([a-z0-9-]+)"/g, 'from "./$1.mjs"');
  fs.writeFileSync(path.join(temporary, sourceName.replace(/\.ts$/, ".mjs")), output);
}
const migration = await import(pathToFileURL(path.join(temporary, "asset-catalog-migration.mjs")));
const source = JSON.parse(fs.readFileSync(path.join(repoRoot, "tests/golden/M12-01D/catalog-v1.json"), "utf8"));
const target = JSON.parse(fs.readFileSync(path.join(repoRoot, "tests/golden/M12-01D/catalog-v2.json"), "utf8"));
const report = JSON.parse(fs.readFileSync(path.join(repoRoot, "tests/golden/M12-01D/migration-report.json"), "utf8"));
const manifest = JSON.parse(fs.readFileSync(path.join(repoRoot, "tests/golden/M12-01D/manifest.json"), "utf8"));

test("M12-01D binds migration inputs, outputs, and production protocols", () => {
  assert.equal(manifest.nextTask, "M12-01E");
  for (const artifact of Object.values(manifest.artifacts)) {
    const actual = crypto.createHash("sha256").update(fs.readFileSync(path.join(repoRoot, artifact.path))).digest("hex");
    assert.equal(actual, artifact.sha256, `${artifact.path} hash drifted`);
  }
});

test("M12-01D migrates schema v1 to v2 without dropping source, preview, or library data", async () => {
  const actual = await migration.migrateAssetCatalogV1ToV2(source);
  assert.deepEqual(actual.manifest, target);
  assert.deepEqual(actual.report, report);
  assert.equal(actual.manifest.revision, 7);
  assert.deepEqual(actual.manifest.catalogs.map((item) => item.path), ["Animation", "Characters", "Characters/Heroes"]);
  assert.equal(actual.manifest.assets.filter((item) => item.preview !== null).length, 1);
  assert.deepEqual(actual.manifest.libraries.map((item) => item.libraryId), ["library:characters", "library:materials"]);
  assert.equal(actual.report.preserved.sourceBindings, 2);
});

test("M12-01D preserves canonical UUIDs and deterministically maps legacy IDs", async () => {
  const first = await migration.migrateAssetCatalogV1ToV2(source);
  const second = await migration.migrateAssetCatalogV1ToV2(structuredClone(source));
  assert.deepEqual(second, first);
  const canonical = first.report.catalogMappings.find((item) => item.legacyId.startsWith("4444"));
  assert.equal(canonical.catalogId, canonical.legacyId);
  assert.match(first.report.catalogMappings.find((item) => item.legacyId === "catalog:root").catalogId, /^[a-f0-9-]{36}$/);
  assert.equal(first.report.sourceManifestSha256, report.sourceManifestSha256);
  assert.equal(first.report.targetManifestSha256, report.targetManifestSha256);
});

test.after(() => fs.rmSync(temporary, { recursive: true, force: true }));