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-negative-cases-unit-"));
const sourcePath = path.join(root, "web/protocol/library-negative-cases.ts");
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, "library-negative-cases.mjs"), transpiled.outputText);
const negatives = await import(pathToFileURL(path.join(temporary, "library-negative-cases.mjs")));
const manifest = JSON.parse(fs.readFileSync(path.join(root, "tests/golden/M12-03M/manifest.json"), "utf8"));
const sha256 = (file) => crypto.createHash("sha256").update(fs.readFileSync(path.join(root, file))).digest("hex");
const a = "library:" + "a".repeat(64);
const b = "library:" + "b".repeat(64);
const c = "library:" + "c".repeat(64);
const valid = {
  schemaVersion: 1,
  libraries: [{ libraryId: a, dependencyIds: [b] }, { libraryId: b, dependencyIds: [] }, { libraryId: c, dependencyIds: [] }],
  dataBlocks: [{ dataBlockId: "Object/A", sourceLibraryId: a }, { dataBlockId: "Object/B", sourceLibraryId: b }],
  crossReferences: [],
  reloads: [{ sourceLibraryId: a, generation: 1 }, { sourceLibraryId: a, generation: 2 }],
};

test("M12-03M binds the library negative-case protocol and evidence artifacts", () => {
  assert.equal(manifest.task, "M12-03M");
  assert.equal(manifest.parentTask, "M12-03L");
  assert.equal(manifest.nextTask, "M12-03N");
  for (const artifact of Object.values(manifest.artifacts)) assert.equal(sha256(artifact.path), artifact.sha256, artifact.path);
});

test("M12-03M accepts an acyclic graph with unique data-block and reload identities", () => {
  assert.deepEqual(negatives.validateLibraryNegativeInput(valid), { status: "VALID" });
});

test("M12-03M rejects dependency and cross-library cycles", () => {
  assert.throws(() => negatives.validateLibraryNegativeInput({ ...valid, libraries: [{ libraryId: a, dependencyIds: [b] }, { libraryId: b, dependencyIds: [a] }, { libraryId: c, dependencyIds: [] }] }), { code: "LIBRARY_DEPENDENCY_CYCLE" });
  assert.throws(() => negatives.validateLibraryNegativeInput({ ...valid, crossReferences: [{ fromLibraryId: a, toLibraryId: b }, { fromLibraryId: b, toLibraryId: a }] }), { code: "LIBRARY_DEPENDENCY_CYCLE" });
});

test("M12-03M rejects ID collision, duplicate reload and missing library references", () => {
  assert.throws(() => negatives.validateLibraryNegativeInput({ ...valid, dataBlocks: [{ dataBlockId: "Object/A", sourceLibraryId: a }, { dataBlockId: "Object/A", sourceLibraryId: b }] }), { code: "TASK_VALIDATION_FAILED" });
  assert.throws(() => negatives.validateLibraryNegativeInput({ ...valid, reloads: [{ sourceLibraryId: a, generation: 1 }, { sourceLibraryId: a, generation: 1 }] }), { code: "REVISION_CONFLICT" });
  assert.throws(() => negatives.validateLibraryNegativeInput({ ...valid, dataBlocks: [{ dataBlockId: "Object/A", sourceLibraryId: "library:" + "d".repeat(64) }] }), { code: "ASSET_SOURCE_HASH_MISMATCH" });
});

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