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-archive-conflicts-unit-"));
const sourcePath = path.join(root, "web/protocol/archive-conflicts.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, "archive-conflicts.mjs"), transpiled.outputText);
const conflicts = await import(pathToFileURL(path.join(temporary, "archive-conflicts.mjs")));
const manifest = JSON.parse(fs.readFileSync(path.join(root, "tests/golden/M12-04G/manifest.json"), "utf8"));
const sha256 = (file) => crypto.createHash("sha256").update(fs.readFileSync(path.join(root, file))).digest("hex");
const range = (pathName, compressedOffset, compressedBytes = 2, uncompressedBytes = 2) => ({ path: pathName, compressedOffset, compressedBytes, uncompressedBytes });
const valid = { schemaVersion: 1, byteLength: 10, ranges: [range("a.bin", 0), range("dir/b.bin", 2, 3, 3)] };

test("M12-04G binds range/conflict validation and evidence artifacts", () => {
  assert.equal(manifest.task, "M12-04G");
  assert.equal(manifest.parentTask, "M12-04F");
  assert.equal(manifest.nextTask, "M12-04H");
  for (const artifact of Object.values(manifest.artifacts)) assert.equal(sha256(artifact.path), artifact.sha256, artifact.path);
});

test("M12-04G accepts deterministic non-overlapping ranges and reports totals", () => {
  assert.deepEqual(conflicts.validateArchiveConflicts(valid), { status: "VALID", totalCompressedBytes: 5, totalUncompressedBytes: 5, nonOverlapping: true, uniquePaths: true, noPrefixConflicts: true });
});

test("M12-04G rejects compression bombs, overlaps, duplicate paths, and prefix conflicts", () => {
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, ranges: [range("bomb.bin", 0, 1, conflicts.ARCHIVE_CONFLICT_BUDGET.maxCompressionRatio + 1)] }), { code: "IO_ARCHIVE_UNSAFE" });
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, ranges: [range("a.bin", 0, 4), range("b.bin", 3, 2)] }), { code: "IO_ARCHIVE_UNSAFE" });
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, ranges: [range("same.bin", 0), range("same.bin", 2)] }), { code: "IO_ARCHIVE_UNSAFE" });
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, ranges: [range("folder", 0), range("folder/file.bin", 2)] }), { code: "IO_ARCHIVE_UNSAFE" });
});

test("M12-04G rejects range/source bounds and undeclared fields", () => {
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, byteLength: 4 }), { code: "IO_ARCHIVE_UNSAFE" });
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, ranges: [{ ...valid.ranges[0], future: true }] }), { code: "IO_ARCHIVE_UNSAFE" });
  assert.throws(() => conflicts.validateArchiveConflicts({ ...valid, ranges: [{ ...valid.ranges[0], compressedOffset: 9, compressedBytes: 2 }] }), { code: "IO_ARCHIVE_UNSAFE" });
});

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