import { Component } from "@angular/core";

import { CryptoFunctionService } from "@bitwarden/common/abstractions/cryptoFunction.service";
import { EnvironmentService } from "@bitwarden/common/abstractions/environment.service";
import { PasswordGenerationService } from "@bitwarden/common/abstractions/passwordGeneration.service";
import { PlatformUtilsService } from "@bitwarden/common/abstractions/platformUtils.service";
import { StateService } from "@bitwarden/common/abstractions/state.service";
import { Utils } from "@bitwarden/common/misc/utils";

@Component({
  selector: "app-home",
  templateUrl: "home.component.html",
})
export class HomeComponent {
  constructor(
    protected platformUtilsService: PlatformUtilsService,
    private passwordGenerationService: PasswordGenerationService,
    private stateService: StateService,
    private cryptoFunctionService: CryptoFunctionService,
    private environmentService: EnvironmentService
  ) {}

  async launchSsoBrowser() {
    // Generate necessary sso params
    const passwordOptions: any = {
      type: "password",
      length: 64,
      uppercase: true,
      lowercase: true,
      numbers: true,
      special: false,
    };

    const state =
      (await this.passwordGenerationService.generatePassword(passwordOptions)) +
      ":clientId=browser";
    const codeVerifier = await this.passwordGenerationService.generatePassword(passwordOptions);
    const codeVerifierHash = await this.cryptoFunctionService.hash(codeVerifier, "sha256");
    const codeChallenge = Utils.fromBufferToUrlB64(codeVerifierHash);

    await this.stateService.setSsoCodeVerifier(codeVerifier);
    await this.stateService.setSsoState(state);

    let url = this.environmentService.getWebVaultUrl();
    if (url == null) {
      url = "https://vault.bitwarden.com";
    }

    const redirectUri = url + "/sso-connector.html";

    // Launch browser
    this.platformUtilsService.launchUri(
      url +
        "/#/sso?clientId=browser" +
        "&redirectUri=" +
        encodeURIComponent(redirectUri) +
        "&state=" +
        state +
        "&codeChallenge=" +
        codeChallenge
    );
  }
}