/* eslint-disable */

import { assert, assertEquals } from "../testing/asserts.ts";
import { copy } from "../fs/mod.ts";
import * as path from "../path/mod.ts";
import Context from "./snapshot_preview1.ts";

const ignore = [
  "wasi_clock_time_get_realtime.wasm",
];

// TODO(caspervonb) investigate why these tests are failing on windows and fix
// them.
if (Deno.build.os == "windows") {
  ignore.push("std_fs_metadata_absolute.wasm");
  ignore.push("std_fs_metadata_relative.wasm");
  ignore.push("std_fs_read_dir_absolute.wasm");
  ignore.push("std_fs_read_dir_relative.wasm");
}

if (import.meta.main) {
  const options = JSON.parse(Deno.args[0]);
  const pathname = Deno.args[1];
  const binary = await Deno.readFile(pathname);
  const module = await WebAssembly.compile(binary);

  const context = new Context({
    env: options.env,
    args: [pathname].concat(options.args),
    preopens: options.preopens,
  });

  const instance = new WebAssembly.Instance(module, {
    wasi_snapshot_preview1: context.exports,
  });

  context.memory = instance.exports.memory;

  instance.exports._start();
} else {
  const rootdir = path.dirname(path.fromFileUrl(import.meta.url));
  const testdir = path.join(rootdir, "testdata");

  for await (const entry of Deno.readDir(testdir)) {
    if (!entry.name.endsWith(".wasm")) {
      continue;
    }

    Deno.test({
      name: entry.name,
      ignore: ignore.includes(entry.name),
      fn: async function () {
        const basename = entry.name.replace(/\.wasm$/, ".json");
        const prelude = await Deno.readTextFile(
          path.resolve(testdir, basename),
        );
        const options = JSON.parse(prelude);

        const workdir = await Deno.makeTempDir();
        await copy(
          path.join(testdir, "fixtures"),
          path.join(workdir, "fixtures"),
        );

        try {
          const process = await Deno.run({
            cwd: workdir,
            cmd: [
              `${Deno.execPath()}`,
              "run",
              "--quiet",
              "--unstable",
              "--allow-all",
              import.meta.url,
              prelude,
              path.resolve(testdir, entry.name),
            ],
            stdin: "piped",
            stdout: "piped",
            stderr: "piped",
          });

          if (options.stdin) {
            const stdin = new TextEncoder().encode(options.stdin);
            await Deno.writeAll(process.stdin, stdin);
          }

          process.stdin.close();

          const stdout = await Deno.readAll(process.stdout);

          if (options.stdout) {
            assertEquals(new TextDecoder().decode(stdout), options.stdout);
          } else {
            await Deno.writeAll(Deno.stdout, stdout);
          }

          process.stdout.close();

          const stderr = await Deno.readAll(process.stderr);

          if (options.stderr) {
            assertEquals(new TextDecoder().decode(stderr), options.stderr);
          } else {
            await Deno.writeAll(Deno.stderr, stderr);
          }

          process.stderr.close();

          const status = await process.status();
          assertEquals(status.code, options.exitCode ? +options.exitCode : 0);

          process.close();
        } catch (err) {
          throw err;
        } finally {
          await Deno.remove(workdir, { recursive: true });
        }
      },
    });
  }
}