import BrowserUtilsService from '../services/browserUtils.service';
import CipherService from '../services/cipher.service';

export default class WebRequestBackground {
    private pendingAuthRequests: any[] = [];
    private webRequest: any;
    private isFirefox: boolean;

    constructor(browserUtilsService: BrowserUtilsService, private cipherService: CipherService) {
        this.webRequest = (window as any).chrome.webRequest;
        this.isFirefox = browserUtilsService.isFirefox();
    }

    async init() {
        if (!this.webRequest || !this.webRequest.onAuthRequired) {
            return;
        }

        this.webRequest.onAuthRequired.addListener(async (details: any, callback: any) => {
            if (!details.url || this.pendingAuthRequests.indexOf(details.requestId) !== -1) {
                if (callback) {
                    callback();
                }
                return;
            }

            const domain = BrowserUtilsService.getDomain(details.url);
            if (domain == null) {
                if (callback) {
                    callback();
                }
                return;
            }

            this.pendingAuthRequests.push(details.requestId);

            if (this.isFirefox) {
                return new Promise(async (resolve, reject) => {
                    await this.resolveAuthCredentials(domain, resolve, reject);
                });
            } else {
                await this.resolveAuthCredentials(domain, callback, callback);
            }
        }, { urls: ['http://*/*', 'https://*/*'] }, [this.isFirefox ? 'blocking' : 'asyncBlocking']);

        this.webRequest.onCompleted.addListener(
            (details: any) => this.completeAuthRequest(details), { urls: ['http://*/*'] });
        this.webRequest.onErrorOccurred.addListener(
            (details: any) => this.completeAuthRequest(details), { urls: ['http://*/*'] });
    }

    private async resolveAuthCredentials(domain: string, success: Function, error: Function) {
        try {
            const ciphers = await this.cipherService.getAllDecryptedForDomain(domain);
            if (ciphers == null || ciphers.length !== 1) {
                error();
                return;
            }

            success({
                authCredentials: {
                    username: ciphers[0].login.username,
                    password: ciphers[0].login.password,
                },
            });
        } catch {
            error();
        }
    }

    private completeAuthRequest(details: any) {
        const i = this.pendingAuthRequests.indexOf(details.requestId);
        if (i > -1) {
            this.pendingAuthRequests.splice(i, 1);
        }
    }
}