/**
 * Copyright 2017 Google Inc. All rights reserved.
 *
 * 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.
 */
import { assert } from './assert.js';
import { helper } from './helper.js';
import { createJSHandle, JSHandle } from './JSHandle.js';
export const EVALUATION_SCRIPT_URL = '__puppeteer_evaluation_script__';
const SOURCE_URL_REGEX = /^[\040\t]*\/\/[@#] sourceURL=\s*(\S*?)\s*$/m;
/**
 * This class represents a context for JavaScript execution. A [Page] might have
 * many execution contexts:
 * - each
 *   {@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe |
 *   frame } has "default" execution context that is always created after frame is
 *   attached to DOM. This context is returned by the
 *   {@link frame.executionContext()} method.
 * - {@link https://developer.chrome.com/extensions | Extension}'s content scripts
 *   create additional execution contexts.
 *
 * Besides pages, execution contexts can be found in
 * {@link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API |
 * workers }.
 *
 * @public
 */
export class ExecutionContext {
    /**
     * @internal
     */
    constructor(client, contextPayload, world) {
        this._client = client;
        this._world = world;
        this._contextId = contextPayload.id;
    }
    /**
     * @remarks
     *
     * Not every execution context is associated with a frame. For
     * example, workers and extensions have execution contexts that are not
     * associated with frames.
     *
     * @returns The frame associated with this execution context.
     */
    frame() {
        return this._world ? this._world.frame() : null;
    }
    /**
     * @remarks
     * If the function passed to the `executionContext.evaluate` returns a
     * Promise, then `executionContext.evaluate` would wait for the promise to
     * resolve and return its value. If the function passed to the
     * `executionContext.evaluate` returns a non-serializable value, then
     * `executionContext.evaluate` resolves to `undefined`. DevTools Protocol also
     * supports transferring some additional values that are not serializable by
     * `JSON`: `-0`, `NaN`, `Infinity`, `-Infinity`, and bigint literals.
     *
     *
     * @example
     * ```js
     * const executionContext = await page.mainFrame().executionContext();
     * const result = await executionContext.evaluate(() => Promise.resolve(8 * 7))* ;
     * console.log(result); // prints "56"
     * ```
     *
     * @example
     * A string can also be passed in instead of a function.
     *
     * ```js
     * console.log(await executionContext.evaluate('1 + 2')); // prints "3"
     * ```
     *
     * @example
     * {@link JSHandle} instances can be passed as arguments to the
     * `executionContext.* evaluate`:
     * ```js
     * const oneHandle = await executionContext.evaluateHandle(() => 1);
     * const twoHandle = await executionContext.evaluateHandle(() => 2);
     * const result = await executionContext.evaluate(
     *    (a, b) => a + b, oneHandle, * twoHandle
     * );
     * await oneHandle.dispose();
     * await twoHandle.dispose();
     * console.log(result); // prints '3'.
     * ```
     * @param pageFunction a function to be evaluated in the `executionContext`
     * @param args argument to pass to the page function
     *
     * @returns A promise that resolves to the return value of the given function.
     */
    async evaluate(pageFunction, ...args) {
        return await this._evaluateInternal(true, pageFunction, ...args);
    }
    /**
     * @remarks
     * The only difference between `executionContext.evaluate` and
     * `executionContext.evaluateHandle` is that `executionContext.evaluateHandle`
     * returns an in-page object (a {@link JSHandle}).
     * If the function passed to the `executionContext.evaluateHandle` returns a
     * Promise, then `executionContext.evaluateHandle` would wait for the
     * promise to resolve and return its value.
     *
     * @example
     * ```js
     * const context = await page.mainFrame().executionContext();
     * const aHandle = await context.evaluateHandle(() => Promise.resolve(self));
     * aHandle; // Handle for the global object.
     * ```
     *
     * @example
     * A string can also be passed in instead of a function.
     *
     * ```js
     * // Handle for the '3' * object.
     * const aHandle = await context.evaluateHandle('1 + 2');
     * ```
     *
     * @example
     * JSHandle instances can be passed as arguments
     * to the `executionContext.* evaluateHandle`:
     *
     * ```js
     * const aHandle = await context.evaluateHandle(() => document.body);
     * const resultHandle = await context.evaluateHandle(body => body.innerHTML, * aHandle);
     * console.log(await resultHandle.jsonValue()); // prints body's innerHTML
     * await aHandle.dispose();
     * await resultHandle.dispose();
     * ```
     *
     * @param pageFunction a function to be evaluated in the `executionContext`
     * @param args argument to pass to the page function
     *
     * @returns A promise that resolves to the return value of the given function
     * as an in-page object (a {@link JSHandle}).
     */
    async evaluateHandle(pageFunction, ...args) {
        return this._evaluateInternal(false, pageFunction, ...args);
    }
    async _evaluateInternal(returnByValue, pageFunction, ...args) {
        const suffix = `//# sourceURL=${EVALUATION_SCRIPT_URL}`;
        if (helper.isString(pageFunction)) {
            const contextId = this._contextId;
            const expression = pageFunction;
            const expressionWithSourceUrl = SOURCE_URL_REGEX.test(expression)
                ? expression
                : expression + '\n' + suffix;
            const { exceptionDetails, result: remoteObject } = await this._client
                .send('Runtime.evaluate', {
                expression: expressionWithSourceUrl,
                contextId,
                returnByValue,
                awaitPromise: true,
                userGesture: true,
            })
                .catch(rewriteError);
            if (exceptionDetails)
                throw new Error('Evaluation failed: ' + helper.getExceptionMessage(exceptionDetails));
            return returnByValue
                ? helper.valueFromRemoteObject(remoteObject)
                : createJSHandle(this, remoteObject);
        }
        if (typeof pageFunction !== 'function')
            throw new Error(`Expected to get |string| or |function| as the first argument, but got "${pageFunction}" instead.`);
        let functionText = pageFunction.toString();
        try {
            new Function('(' + functionText + ')');
        }
        catch (error) {
            // This means we might have a function shorthand. Try another
            // time prefixing 'function '.
            if (functionText.startsWith('async '))
                functionText =
                    'async function ' + functionText.substring('async '.length);
            else
                functionText = 'function ' + functionText;
            try {
                new Function('(' + functionText + ')');
            }
            catch (error) {
                // We tried hard to serialize, but there's a weird beast here.
                throw new Error('Passed function is not well-serializable!');
            }
        }
        let callFunctionOnPromise;
        try {
            callFunctionOnPromise = this._client.send('Runtime.callFunctionOn', {
                functionDeclaration: functionText + '\n' + suffix + '\n',
                executionContextId: this._contextId,
                arguments: args.map(convertArgument.bind(this)),
                returnByValue,
                awaitPromise: true,
                userGesture: true,
            });
        }
        catch (error) {
            if (error instanceof TypeError &&
                error.message.startsWith('Converting circular structure to JSON'))
                error.message += ' Are you passing a nested JSHandle?';
            throw error;
        }
        const { exceptionDetails, result: remoteObject, } = await callFunctionOnPromise.catch(rewriteError);
        if (exceptionDetails)
            throw new Error('Evaluation failed: ' + helper.getExceptionMessage(exceptionDetails));
        return returnByValue
            ? helper.valueFromRemoteObject(remoteObject)
            : createJSHandle(this, remoteObject);
        /**
         * @param {*} arg
         * @returns {*}
         * @this {ExecutionContext}
         */
        function convertArgument(arg) {
            if (typeof arg === 'bigint')
                // eslint-disable-line valid-typeof
                return { unserializableValue: `${arg.toString()}n` };
            if (Object.is(arg, -0))
                return { unserializableValue: '-0' };
            if (Object.is(arg, Infinity))
                return { unserializableValue: 'Infinity' };
            if (Object.is(arg, -Infinity))
                return { unserializableValue: '-Infinity' };
            if (Object.is(arg, NaN))
                return { unserializableValue: 'NaN' };
            const objectHandle = arg && arg instanceof JSHandle ? arg : null;
            if (objectHandle) {
                if (objectHandle._context !== this)
                    throw new Error('JSHandles can be evaluated only in the context they were created!');
                if (objectHandle._disposed)
                    throw new Error('JSHandle is disposed!');
                if (objectHandle._remoteObject.unserializableValue)
                    return {
                        unserializableValue: objectHandle._remoteObject.unserializableValue,
                    };
                if (!objectHandle._remoteObject.objectId)
                    return { value: objectHandle._remoteObject.value };
                return { objectId: objectHandle._remoteObject.objectId };
            }
            return { value: arg };
        }
        function rewriteError(error) {
            if (error.message.includes('Object reference chain is too long'))
                return { result: { type: 'undefined' } };
            if (error.message.includes("Object couldn't be returned by value"))
                return { result: { type: 'undefined' } };
            if (error.message.endsWith('Cannot find context with specified id') ||
                error.message.endsWith('Inspected target navigated or closed'))
                throw new Error('Execution context was destroyed, most likely because of a navigation.');
            throw error;
        }
    }
    /**
     * This method iterates the JavaScript heap and finds all the objects with the
     * given prototype.
     * @remarks
     * @example
     * ```js
     * // Create a Map object
     * await page.evaluate(() => window.map = new Map());
     * // Get a handle to the Map object prototype
     * const mapPrototype = await page.evaluateHandle(() => Map.prototype);
     * // Query all map instances into an array
     * const mapInstances = await page.queryObjects(mapPrototype);
     * // Count amount of map objects in heap
     * const count = await page.evaluate(maps => maps.length, mapInstances);
     * await mapInstances.dispose();
     * await mapPrototype.dispose();
     * ```
     *
     * @param prototypeHandle a handle to the object prototype
     *
     * @returns A handle to an array of objects with the given prototype.
     */
    async queryObjects(prototypeHandle) {
        assert(!prototypeHandle._disposed, 'Prototype JSHandle is disposed!');
        assert(prototypeHandle._remoteObject.objectId, 'Prototype JSHandle must not be referencing primitive value');
        const response = await this._client.send('Runtime.queryObjects', {
            prototypeObjectId: prototypeHandle._remoteObject.objectId,
        });
        return createJSHandle(this, response.objects);
    }
    /**
     * @internal
     */
    async _adoptBackendNodeId(backendNodeId) {
        const { object } = await this._client.send('DOM.resolveNode', {
            backendNodeId: backendNodeId,
            executionContextId: this._contextId,
        });
        return createJSHandle(this, object);
    }
    /**
     * @internal
     */
    async _adoptElementHandle(elementHandle) {
        assert(elementHandle.executionContext() !== this, 'Cannot adopt handle that already belongs to this execution context');
        assert(this._world, 'Cannot adopt handle without DOMWorld');
        const nodeInfo = await this._client.send('DOM.describeNode', {
            objectId: elementHandle._remoteObject.objectId,
        });
        return this._adoptBackendNodeId(nodeInfo.node.backendNodeId);
    }
}
