"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.parseEvaluationResultValue = parseEvaluationResultValue;
exports.serializeAsCallArgument = serializeAsCallArgument;

/**
 * Copyright (c) Microsoft Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function isRegExp(obj) {
  return obj instanceof RegExp || Object.prototype.toString.call(obj) === '[object RegExp]';
}

function isDate(obj) {
  return obj instanceof Date || Object.prototype.toString.call(obj) === '[object Date]';
}

function isError(obj) {
  return obj instanceof Error || obj && obj.__proto__ && obj.__proto__.name === 'Error';
}

function parseEvaluationResultValue(value, handles = []) {
  if (Object.is(value, undefined)) return undefined;

  if (typeof value === 'object' && value) {
    if ('v' in value) {
      if (value.v === 'undefined') return undefined;
      if (value.v === 'null') return null;
      if (value.v === 'NaN') return NaN;
      if (value.v === 'Infinity') return Infinity;
      if (value.v === '-Infinity') return -Infinity;
      if (value.v === '-0') return -0;
      return undefined;
    }

    if ('d' in value) return new Date(value.d);
    if ('r' in value) return new RegExp(value.r.p, value.r.f);
    if ('a' in value) return value.a.map(a => parseEvaluationResultValue(a, handles));

    if ('o' in value) {
      const result = {};

      for (const {
        k,
        v
      } of value.o) result[k] = parseEvaluationResultValue(v, handles);

      return result;
    }

    if ('h' in value) return handles[value.h];
  }

  return value;
}

function serializeAsCallArgument(value, handleSerializer) {
  return serialize(value, handleSerializer, new Set());
}

function serialize(value, handleSerializer, visited) {
  const result = handleSerializer(value);
  if ('fallThrough' in result) value = result.fallThrough;else return result;
  if (visited.has(value)) throw new Error('Argument is a circular structure');
  if (typeof value === 'symbol') return {
    v: 'undefined'
  };
  if (Object.is(value, undefined)) return {
    v: 'undefined'
  };
  if (Object.is(value, null)) return {
    v: 'null'
  };
  if (Object.is(value, NaN)) return {
    v: 'NaN'
  };
  if (Object.is(value, Infinity)) return {
    v: 'Infinity'
  };
  if (Object.is(value, -Infinity)) return {
    v: '-Infinity'
  };
  if (Object.is(value, -0)) return {
    v: '-0'
  };
  if (typeof value === 'boolean') return value;
  if (typeof value === 'number') return value;
  if (typeof value === 'string') return value;

  if (isError(value)) {
    const error = value;

    if ('captureStackTrace' in global.Error) {
      // v8
      return error.stack || '';
    }

    return `${error.name}: ${error.message}\n${error.stack}`;
  }

  if (isDate(value)) return {
    d: value.toJSON()
  };
  if (isRegExp(value)) return {
    r: {
      p: value.source,
      f: value.flags
    }
  };

  if (Array.isArray(value)) {
    const a = [];
    visited.add(value);

    for (let i = 0; i < value.length; ++i) a.push(serialize(value[i], handleSerializer, visited));

    visited.delete(value);
    return {
      a
    };
  }

  if (typeof value === 'object') {
    const o = [];
    visited.add(value);

    for (const name of Object.keys(value)) {
      let item;

      try {
        item = value[name];
      } catch (e) {
        continue; // native bindings will throw sometimes
      }

      if (name === 'toJSON' && typeof item === 'function') o.push({
        k: name,
        v: {
          o: []
        }
      });else o.push({
        k: name,
        v: serialize(item, handleSerializer, visited)
      });
    }

    visited.delete(value);
    return {
      o
    };
  }
}