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

const tests = [
  "testdata/std_env_args_none.wasm",
  "testdata/std_env_args_some.wasm",
  "testdata/std_env_vars_none.wasm",
  "testdata/std_env_vars_some.wasm",
  "testdata/std_fs_create_dir_absolute.wasm",
  "testdata/std_fs_create_dir_relative.wasm",
  "testdata/std_fs_file_create_absolute.wasm",
  "testdata/std_fs_file_create_relative.wasm",
  "testdata/std_fs_file_metadata_absolute.wasm",
  "testdata/std_fs_file_metadata_relative.wasm",
  "testdata/std_fs_file_seek_absolute.wasm",
  "testdata/std_fs_file_seek_relative.wasm",
  "testdata/std_fs_file_set_len_absolute.wasm",
  "testdata/std_fs_file_set_len_relative.wasm",
  "testdata/std_fs_file_sync_all_absolute.wasm",
  "testdata/std_fs_file_sync_all_relative.wasm",
  "testdata/std_fs_file_sync_data_absolute.wasm",
  "testdata/std_fs_file_sync_data_relative.wasm",
  "testdata/std_fs_hard_link_absolute.wasm",
  "testdata/std_fs_hard_link_relative.wasm",
  "testdata/std_fs_metadata_absolute.wasm",
  "testdata/std_fs_metadata_relative.wasm",
  "testdata/std_fs_read_absolute.wasm",
  "testdata/std_fs_read_dir_absolute.wasm",
  "testdata/std_fs_read_dir_relative.wasm",
  "testdata/std_fs_read_relative.wasm",
  "testdata/std_fs_remove_dir_all_absolute.wasm",
  "testdata/std_fs_remove_dir_all_relative.wasm",
  "testdata/std_fs_rename_absolute.wasm",
  "testdata/std_fs_rename_relative.wasm",
  "testdata/std_fs_symlink_metadata_absolute.wasm",
  "testdata/std_fs_symlink_metadata_relative.wasm",
  "testdata/std_fs_write_absolute.wasm",
  "testdata/std_fs_write_relative.wasm",
  "testdata/std_io_stderr.wasm",
  "testdata/std_io_stdin.wasm",
  "testdata/std_io_stdout.wasm",
  "testdata/std_process_exit.wasm",
  "testdata/wasi_clock_res_get_monotonic.wasm",
  "testdata/wasi_clock_res_get_process.wasm",
  "testdata/wasi_clock_res_get_realtime.wasm",
  "testdata/wasi_clock_res_get_thread.wasm",
  "testdata/wasi_clock_time_get_monotonic.wasm",
  "testdata/wasi_clock_time_get_process.wasm",
  "testdata/wasi_clock_time_get_realtime.wasm",
  "testdata/wasi_clock_time_get_thread.wasm",
  "testdata/wasi_fd_fdstat_get_stderr.wasm",
  "testdata/wasi_fd_fdstat_get_stdin.wasm",
  "testdata/wasi_fd_fdstat_get_stdout.wasm",
  "testdata/wasi_fd_tell_file.wasm",
  "testdata/wasi_fd_write_file.wasm",
  "testdata/wasi_fd_write_stderr.wasm",
  "testdata/wasi_fd_write_stdout.wasm",
  "testdata/wasi_proc_exit_one.wasm",
  "testdata/wasi_proc_exit_zero.wasm",
  "testdata/wasi_random_get.wasm",
];

const ignore = [
  "testdata/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("testdata/std_fs_metadata_absolute.wasm");
  ignore.push("testdata/std_fs_metadata_relative.wasm");
  ignore.push("testdata/std_fs_read_dir_absolute.wasm");
  ignore.push("testdata/std_fs_read_dir_relative.wasm");
}

const rootdir = path.dirname(path.fromFileUrl(import.meta.url));
const testdir = path.join(rootdir, "testdata");

for (const pathname of tests) {
  Deno.test({
    name: path.basename(pathname),
    ignore: ignore.includes(pathname),
    fn: async function () {
      const prelude = await Deno.readTextFile(
        path.resolve(rootdir, pathname.replace(/\.wasm$/, ".json")),
      );
      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",
            path.resolve(rootdir, "snapshot_preview1_test_runner.ts"),
            prelude,
            path.resolve(rootdir, pathname),
          ],
          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 });
      }
    },
  });
}