const addBruShimToContext = require('./shims/bru');
const addBrunoRequestShimToContext = require('./shims/bruno-request');
const addConsoleShimToContext = require('./shims/console');
const addBrunoResponseShimToContext = require('./shims/bruno-response');
const addTestShimToContext = require('./shims/test');
const addLibraryShimsToContext = require('./shims/lib');
const { newQuickJSWASMModule, memoizePromiseFactory } = require('quickjs-emscripten');

// execute `npm run sandbox:bundle-libraries` if the below file doesn't exist
const getBundledCode = require('../bundle-browser-rollup');
const addSleepShimToContext = require('./shims/sleep');

let QuickJSSyncContext;
const loader = memoizePromiseFactory(() => newQuickJSWASMModule());
const getContext = (opts) => loader().then((mod) => (QuickJSSyncContext = mod.newContext(opts)));
getContext();

const toNumber = (value) => {
  const num = Number(value);
  return Number.isInteger(num) ? parseInt(value, 10) : parseFloat(value);
};

const executeQuickJsVm = ({ script: externalScript, context: externalContext, scriptType = 'template-literal' }) => {
  if (!isNaN(Number(externalScript))) {
    return Number(externalScript);
  }

  const vm = QuickJSSyncContext;

  try {
    const { bru, req, res } = externalContext;

    bru && addBruShimToContext(vm, bru);
    req && addBrunoRequestShimToContext(vm, req);
    res && addBrunoResponseShimToContext(vm, res);

    const templateLiteralText = `\`${externalScript}\`;`;
    const jsExpressionText = `${externalScript};`;

    let scriptText = scriptType === 'template-literal' ? templateLiteralText : jsExpressionText;

    const result = vm.evalCode(scriptText);
    if (result.error) {
      let e = vm.dump(result.error);
      result.error.dispose();
      return e;
    } else {
      let v = vm.dump(result.value);
      let vString = v.toString();
      result.value.dispose();
      return v;
    }
  } catch (error) {
    console.error('Error executing the script!', error);
  }
};

const executeQuickJsVmAsync = async ({ script: externalScript, context: externalContext }) => {
  if (!isNaN(Number(externalScript))) {
    return toNumber(externalScript);
  }
  try {
    const module = await newQuickJSWASMModule();
    const vm = module.newContext();

    const bundledCode = getBundledCode?.toString() || '';

    vm.evalCode(
      `
        (${bundledCode})()
        globalThis.require = (module) => {
          return globalThis.requireObject[module];
        }
      `
    );

    const { bru, req, res, test, __brunoTestResults, console: consoleFn } = externalContext;

    bru && addBruShimToContext(vm, bru);
    req && addBrunoRequestShimToContext(vm, req);
    res && addBrunoResponseShimToContext(vm, res);
    consoleFn && addConsoleShimToContext(vm, consoleFn);
    addSleepShimToContext(vm);

    await addLibraryShimsToContext(vm);

    test && __brunoTestResults && addTestShimToContext(vm, __brunoTestResults);

    const script = `
      (async () => {
        const setTimeout = async(fn, timer) => {
          v = await sleep(timer);
          fn.apply();
        }
        await sleep(0);
        try {
          ${externalScript}
        }
        catch(error) {
          console?.debug?.('quick-js:execution-end:with-error', error?.message);
        }
        return 'done';
      })()
    `;

    const result = vm.evalCode(script);
    const promiseHandle = vm.unwrapResult(result);
    const resolvedResult = await vm.resolvePromise(promiseHandle);
    promiseHandle.dispose();
    const resolvedHandle = vm.unwrapResult(resolvedResult);
    resolvedHandle.dispose();
    // vm.dispose();
    return;
  } catch (error) {
    console.error('Error executing the script!', error);
  }
};

module.exports = {
  executeQuickJsVm,
  executeQuickJsVmAsync
};