import { CipherService } from 'jslib-common/abstractions/cipher.service';
import { PlatformUtilsService } from 'jslib-common/abstractions/platformUtils.service';
import { VaultTimeoutService } from 'jslib-common/abstractions/vaultTimeout.service';

import { UriMatchType } from 'jslib-common/enums';

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

    constructor(platformUtilsService: PlatformUtilsService, private cipherService: CipherService,
        private vaultTimeoutService: VaultTimeoutService) {
        this.webRequest = (window as any).chrome.webRequest;
        this.isFirefox = platformUtilsService.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;
            }

            this.pendingAuthRequests.push(details.requestId);

            if (this.isFirefox) {
                return new Promise(async (resolve, reject) => {
                    await this.resolveAuthCredentials(details.url, resolve, reject);
                });
            } else {
                await this.resolveAuthCredentials(details.url, 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) {
        if (await this.vaultTimeoutService.isLocked()) {
            error();
            return;
        }

        try {
            const ciphers = await this.cipherService.getAllDecryptedForUrl(domain, null, UriMatchType.Host);
            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);
        }
    }
}