import * as plugins from '../plugins.js';

import {
  customElement,
  DeesElement,
  property,
  html,
  type TemplateResult,
  css,
  cssManager,
  state,
  domtools,
} from '@design.estate/dees-element';

import '@uptime.link/webwidget';

import { IdpState } from '../states/idp.state.js';

declare global {
  interface HTMLElementTagNameMap {
    'idp-loginprompt': IdpLoginPrompt;
  }
}

@customElement('idp-loginprompt')
export class IdpLoginPrompt extends DeesElement {
  public static demo = () => html`<idp-loginprompt></idp-loginprompt>`;

  @state()
  accessor oidcConsentState: plugins.idpInterfaces.request.IReq_PrepareOidcAuthorization['response'] | null = null;

  @state()
  accessor oidcConsentError = '';

  @property()
  accessor productOfInterest: string;

  @property()
  accessor jwt: string;

  @property({
    reflect: true,
    type: Object,
  })
  accessor appData: plugins.idpInterfaces.data.IApp;

  public jwtObserable = new domtools.plugins.smartrx.rxjs.Subject<string>();

  constructor() {
    super();
    domtools.elementBasic.setup();
  }

  private getOidcAuthorizationContext(): Omit<
    plugins.idpInterfaces.request.IReq_CompleteOidcAuthorization['request'],
    'jwt'
  > | null {
    const currentUrl = plugins.smarturl.Smarturl.createFromUrl(window.location.href);

    if (currentUrl.searchParams.oauth !== 'true') {
      return null;
    }

    const clientId = currentUrl.searchParams.client_id;
    const redirectUri = currentUrl.searchParams.redirect_uri;
    const scope = currentUrl.searchParams.scope;
    const state = currentUrl.searchParams.state;

    if (!clientId || !redirectUri || !scope || !state) {
      return null;
    }

    const prompt = ['none', 'login', 'consent'].includes(currentUrl.searchParams.prompt)
      ? (currentUrl.searchParams.prompt as 'none' | 'login' | 'consent')
      : undefined;

    return {
      clientId,
      redirectUri,
      scope,
      state,
      prompt,
      codeChallenge: currentUrl.searchParams.code_challenge || undefined,
      codeChallengeMethod:
        currentUrl.searchParams.code_challenge_method === 'S256' ? 'S256' : undefined,
      nonce: currentUrl.searchParams.nonce || undefined,
    };
  }

  private redirectOidcError(errorArg: string, descriptionArg?: string) {
    const oidcContext = this.getOidcAuthorizationContext();
    if (!oidcContext) {
      return false;
    }

    const redirectUrl = new URL(oidcContext.redirectUri);
    redirectUrl.searchParams.set('error', errorArg);
    redirectUrl.searchParams.set('state', oidcContext.state);
    if (descriptionArg) {
      redirectUrl.searchParams.set('error_description', descriptionArg);
    }
    window.location.href = redirectUrl.toString();
    return true;
  }

  private getOidcScopeDescription(scopeArg: plugins.idpInterfaces.data.TOidcScope) {
    const scopeMap: Record<plugins.idpInterfaces.data.TOidcScope, string> = {
      openid: 'Confirm your identity with this app.',
      profile: 'Share your display name and username.',
      email: 'Share your email address.',
      organizations: 'Share your organizations and their roles.',
      roles: 'Share your platform roles.',
    };

    return scopeMap[scopeArg];
  }

  private getOidcAppHost(appUrlArg: string) {
    try {
      return new URL(appUrlArg).hostname;
    } catch {
      return appUrlArg;
    }
  }

  private async prepareOidcAuthorization(jwtArg: string) {
    const oidcContext = this.getOidcAuthorizationContext();
    if (!oidcContext) {
      return null;
    }

    const idpState = await IdpState.getSingletonInstance();
    return idpState.idpClient.requests.prepareOidcAuthorization
      .fire({
        jwt: jwtArg,
        ...oidcContext,
      })
      .catch(() => null);
  }

  private async handleOidcAfterLogin(jwtArg: string) {
    const oidcContext = this.getOidcAuthorizationContext();
    if (!oidcContext) {
      return false;
    }

    const loginForm = this.shadowRoot.querySelector('#loginForm') as plugins.idpCatalog.IdpForm | null;
    loginForm?.setStatus('pending', 'preparing application authorization...');
    this.oidcConsentError = '';

    const preparation = await this.prepareOidcAuthorization(jwtArg);
    if (!preparation) {
      loginForm?.setStatus('error', 'could not prepare the application authorization');
      return true;
    }

    if (preparation.status === 'consent_required') {
      if (oidcContext.prompt === 'none') {
        this.redirectOidcError('consent_required');
        return true;
      }

      this.oidcConsentState = preparation;
      return true;
    }

    await this.completeOidcAuthorization(jwtArg);
    return true;
  }

  private async completeOidcAuthorization(jwtArg: string, consentApproved = false) {
    const oidcContext = this.getOidcAuthorizationContext();
    if (!oidcContext) {
      return false;
    }

    const idpState = await IdpState.getSingletonInstance();
    const loginForm = this.shadowRoot.querySelector('#loginForm') as plugins.idpCatalog.IdpForm | null;
    loginForm?.setStatus('pending', 'authorizing application...');
    this.oidcConsentError = '';

    const response = await idpState.idpClient.requests.completeOidcAuthorization
      .fire({
        jwt: jwtArg,
        ...oidcContext,
        consentApproved,
      })
      .catch(() => null);

    if (!response?.redirectUrl) {
      if (this.oidcConsentState) {
        this.oidcConsentError = 'Could not authorize the application.';
      } else {
        loginForm?.setStatus('error', 'could not authorize the application');
      }
      return false;
    }

    window.location.href = response.redirectUrl;
    return true;
  }

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        --foreground: hsl(0 0% 98%);
        --muted-foreground: hsl(240 5% 64.9%);

        font-family: 'Geist Sans', -apple-system, BlinkMacSystemFont, sans-serif;
        display: block;
        color: var(--foreground);
      }

      .form-header {
        margin-bottom: 32px;
        text-align: center;
      }

      .form-header h2 {
        font-size: 24px;
        font-weight: 600;
        color: var(--foreground);
        margin: 0 0 8px 0;
        letter-spacing: -0.02em;
      }

      .form-header p {
        font-size: 14px;
        color: var(--muted-foreground);
        margin: 0;
      }

      idp-form {
        display: flex;
        flex-direction: column;
        gap: 16px;
      }

      .form-footer {
        margin-top: 24px;
        text-align: center;
        font-size: 14px;
        color: var(--muted-foreground);
      }

      .form-footer a {
        color: var(--foreground);
        text-decoration: none;
        font-weight: 500;
        cursor: pointer;
        transition: opacity 0.15s ease;
      }

      .form-footer a:hover {
        opacity: 0.8;
      }

      .consent-card {
        display: flex;
        flex-direction: column;
        gap: 16px;
        padding: 24px;
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 18px;
        background: rgba(255, 255, 255, 0.04);
      }

      .consent-appname {
        font-size: 20px;
        font-weight: 600;
      }

      .consent-appurl {
        color: var(--muted-foreground);
        font-size: 14px;
        word-break: break-word;
      }

      .consent-scopes {
        display: flex;
        flex-direction: column;
        gap: 12px;
      }

      .consent-scope {
        padding: 14px 16px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.03);
      }

      .consent-scope-header {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        font-size: 12px;
      }

      .consent-scope-tag {
        color: #9cd67c;
      }

      .consent-scope-description {
        margin-top: 6px;
        color: var(--muted-foreground);
        font-size: 14px;
        line-height: 1.5;
      }

      .consent-actions {
        display: flex;
        justify-content: flex-end;
        gap: 12px;
      }

      .consent-error {
        color: #ff9a9a;
        font-size: 14px;
      }
    `,
  ];

  public render(): TemplateResult {
    if (this.oidcConsentState) {
      return html`
        <idp-centercontainer>
          <div class="form-header">
            <h2>Continue to ${this.oidcConsentState.appName}</h2>
            <p>Review and approve the access this app is requesting.</p>
          </div>
          <div class="consent-card">
            <div class="consent-appname">${this.oidcConsentState.appName}</div>
            <div class="consent-appurl">${this.getOidcAppHost(this.oidcConsentState.appUrl)}</div>
            <div class="consent-scopes">
              ${this.oidcConsentState.requestedScopes.map((scopeArg) => html`
                <div class="consent-scope">
                  <div class="consent-scope-header">
                    <span>${scopeArg}</span>
                    ${this.oidcConsentState.grantedScopes.includes(scopeArg)
                      ? html`<span class="consent-scope-tag">Previously allowed</span>`
                      : null}
                  </div>
                  <div class="consent-scope-description">${this.getOidcScopeDescription(scopeArg)}</div>
                </div>
              `)}
            </div>
            ${this.oidcConsentError ? html`<div class="consent-error">${this.oidcConsentError}</div>` : null}
            <div class="consent-actions">
              <idp-button
                variant="outline"
                @click=${() => {
                  this.redirectOidcError('access_denied');
                }}
              >
                Cancel
              </idp-button>
              <idp-button
                variant="accent"
                @click=${async () => {
                  const idpState = await IdpState.getSingletonInstance();
                  const jwt = await idpState.idpClient.getJwt();
                  if (!jwt) {
                    this.redirectOidcError('login_required');
                    return;
                  }
                  await this.completeOidcAuthorization(jwt, true);
                }}
              >
                Allow and continue
              </idp-button>
            </div>
          </div>
        </idp-centercontainer>
      `;
    }

    return html`
      <idp-centercontainer>
        <div class="form-header">
          <h2>Sign in to your account</h2>
          <p>Enter your credentials to continue</p>
        </div>
        <idp-form
          id="loginForm"
          @idp-submit=${(eventArg: CustomEvent<plugins.idpCatalog.IIdpFormSubmitEventDetail>) => {
            this.login({
              emailAddress: String(eventArg.detail.data.emailAddress || ''),
              passwordArg: String(eventArg.detail.data.password || ''),
            });
          }}
        >
          <idp-input
            id="loginEmailInput"
            required
            name="emailAddress"
            label="Email or Username"
            autocomplete="username"
          ></idp-input>
          <idp-input
            id="loginPasswordInput"
            name="password"
            label="Password"
            type="password"
            autocomplete="current-password"
          ></idp-input>
          <idp-form-submit id="loginSubmitButton"></idp-form-submit>
        </idp-form>
        <div class="form-footer">
          Don't have an account?
          <a @click=${async () => {
            const idpState = await IdpState.getSingletonInstance();
            idpState.domtools.router.pushUrl('/register');
          }}>Create one</a>
        </div>
      </idp-centercontainer>
    `;
  }

  public async firstUpdated() {
    await this.domtoolsPromise;
    const idpState = await IdpState.getSingletonInstance();
    const loginForm = this.shadowRoot.querySelector('#loginForm') as plugins.idpCatalog.IdpForm;
    const loginPasswordInput = loginForm.querySelector('#loginPasswordInput') as plugins.idpCatalog.IdpInput;
    const loginSubmitButton = loginForm.querySelector('#loginSubmitButton') as plugins.idpCatalog.IdpFormSubmit;
    const oidcContext = this.getOidcAuthorizationContext();
    const setButtonText = async () => {
      if (loginPasswordInput.value) {
        loginSubmitButton.text = oidcContext ? 'Sign in and continue' : 'Login';
      } else {
        loginSubmitButton.text = 'Send magic link (or enter password)';
      }
    };
    loginForm.addEventListener('idp-input-change', () => {
      void setButtonText();
    });
    await setButtonText();

    if (oidcContext) {
      const loggedIn = await idpState.idpClient.determineLoginStatus(false);
      if (!loggedIn && oidcContext.prompt === 'none') {
        this.redirectOidcError('login_required');
        return;
      }

      if (loggedIn && oidcContext.prompt !== 'login') {
        const jwt = await idpState.idpClient.getJwt();
        if (jwt) {
          await this.handleOidcAfterLogin(jwt);
        }
      }
    } else if (await idpState.idpClient.determineLoginStatus(false)) {
      idpState.domtools.router.pushUrl('/dash/overview');
    }
  }

  private login = async (valueArg: { emailAddress: string; passwordArg: string }) => {
    const loginSubmitButton = this.shadowRoot.querySelector(
      '#loginSubmitButton'
    ) as plugins.idpCatalog.IdpFormSubmit;
    loginSubmitButton.disabled = true;

    const idpState = await IdpState.getSingletonInstance();
    const loginForm = this.shadowRoot.querySelector('#loginForm') as plugins.idpCatalog.IdpForm;
    const loginRequestWithUsernameAndPassword =
      idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_LoginWithEmailOrUsernameAndPassword>(
        'loginWithEmailOrUsernameAndPassword'
      );
    const loginRequestWithEmail =
      idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_LoginWithEmail>(
        'loginWithEmail'
      );

    if (valueArg.emailAddress && valueArg.passwordArg) {
      loginForm.setStatus('pending', 'logging in...');
      const response = await loginRequestWithUsernameAndPassword
        .fire({
          username: valueArg.emailAddress,
          password: valueArg.passwordArg,
        })
        .catch(() => {
          loginForm.setStatus('error', 'could not log you in. Try Again!');
          return null;
        });
      if (!response) {
        loginSubmitButton.disabled = false;
        return;
      }
      if (response.refreshToken) {
        loginForm.setStatus('pending', 'obtained refreshToken...');
        const jwt = await idpState.idpClient.refreshJwt(response.refreshToken);
        if (jwt) {
          loginForm.setStatus('success', 'obtained jwt.');
          const oidcHandled = await this.handleOidcAfterLogin(jwt);
          if (!oidcHandled) {
            idpState.domtools.router.pushUrl('/dash/overview');
          }
        } else {
          loginForm.setStatus('error', 'something went wrong');
        }
      }
    } else if (valueArg.emailAddress && !valueArg.passwordArg) {
      loginForm.setStatus('pending', 'sending magic link...');
      const response = await loginRequestWithEmail.fire({
        email: valueArg.emailAddress,
      }).catch((err) => {
        const message = err?.errorText || err?.message || 'Could not send the magic link. Please try again.';
        loginForm.setStatus('error', message);
        return null;
      });
      if (response?.status === 'ok') {
        loginForm.setStatus('success', 'Please check your email!');
      }
    }

    loginSubmitButton.disabled = false;
  };

  public async dispatchJwt(jwtArg?: string) {
    if (jwtArg !== undefined) {
      this.jwt = jwtArg;
      await domtools.plugins.smartdelay.delayFor(200);
      this.dispatchEvent(
        new CustomEvent('leleLoginGotJwt', {
          detail: {
            jwt: this.jwt,
          },
        })
      );
      this.jwtObserable.next(this.jwt);
    }
  }

  public async focus() {
    (this.shadowRoot.querySelector('#loginEmailInput') as plugins.idpCatalog.IdpInput).focus();
  }

  public async show() {
    await this.updateComplete;
    const centerContainer = this.shadowRoot.querySelector('idp-centercontainer');
    await centerContainer.show();
  }

  public async hide() {
    await this.updateComplete;
    const centerContainer = this.shadowRoot.querySelector('idp-centercontainer');
    await centerContainer.hide();
  }
}