// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <zircon/syscalls.h>

#include <string>

#include "gtest/gtest.h"
#include "quickjs-libc.h"
#include "quickjs.h"

// Sanity check test to make sure Hello World works.
TEST(Qjs, Sanity) {
  JSRuntime *rt = JS_NewRuntime();
  ASSERT_NE(rt, nullptr) << "Cannot allocate JS runtime";

  js_std_init_handlers(rt);

  JSContext *ctx = JS_NewContext(rt);
  ASSERT_NE(ctx, nullptr) << "Cannot allocate JS context";

  /* system modules */
  js_init_module_std(ctx, "std");
  js_init_module_os(ctx, "os");

  const char *str =
      "import * as std from 'std';\n"
      "import * as os from 'os';\n"
      "globalThis.std = std;\n"
      "globalThis.os = os;\n";
  JSValue init_compile =
      JS_Eval(ctx, str, strlen(str), "<input>", JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY);

  ASSERT_FALSE(JS_IsException(init_compile));
  js_module_set_import_meta(ctx, init_compile, 1, 1);
  JSValue init_run = JS_EvalFunction(ctx, init_compile);

  ASSERT_FALSE(JS_IsException(init_run));

  std::string hello_world = "Hello World";
  std::string test_val = "globalThis.std.printf('" + hello_world + "');";
  JSValue result = JS_Eval(ctx, test_val.c_str(), test_val.length(), "test", 0);
  int32_t len;
  int to_int_32;
  if ((to_int_32 = JS_ToInt32(ctx, &len, result)) != 0) {
    js_std_dump_error(ctx);
    ASSERT_EQ(0, JS_ToInt32(ctx, &len, result));
  }
  ASSERT_EQ(hello_world.length(), len);
}

// Testing os.setTimeout, for 1ms wait.
TEST(Qjs, SetTimeout) {
  JSRuntime *rt = JS_NewRuntime();
  ASSERT_NE(rt, nullptr) << "Cannot allocate JS runtime";

  js_std_init_handlers(rt);

  JSContext *ctx = JS_NewContext(rt);
  ASSERT_NE(ctx, nullptr) << "Cannot allocate JS context";

  /* system modules */
  js_init_module_std(ctx, "std");
  js_init_module_os(ctx, "os");

  const char *str =
      "import * as std from 'std';\n"
      "import * as os from 'os';\n"
      "globalThis.std = std;\n"
      "globalThis.os = os;\n";
  JSValue init_compile =
      JS_Eval(ctx, str, strlen(str), "<input>", JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY);

  ASSERT_FALSE(JS_IsException(init_compile));
  js_module_set_import_meta(ctx, init_compile, 1, 1);
  JSValue init_run = JS_EvalFunction(ctx, init_compile);

  ASSERT_FALSE(JS_IsException(init_run));

  js_std_loop(ctx);
  std::string test_val =
      "var a = false;"
      "os.setTimeout(() => {a = true;}, 1);";
  JSValue intermediate = JS_Eval(ctx, test_val.c_str(), test_val.length(), "test", 0);
  zx_nanosleep(zx_deadline_after(ZX_MSEC(1)));
  js_std_loop(ctx);
  std::string test_val2 = "c = a;";
  JSValue result = JS_Eval(ctx, test_val2.c_str(), test_val2.length(), "test", 0);
  bool result_as_bool = JS_ToBool(ctx, result);

  ASSERT_EQ(result_as_bool, true);
}