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

import { LitElement, html, css, type TemplateResult } from 'lit';
import { customElement } from 'lit/decorators.js';
import { property } from 'lit/decorators/property.js';

import * as csInterfaces from '@consent.software/interfaces';
import * as csWebclient from '@consent.software/webclient';
import { delayFor } from '@push.rocks/smartdelay';

declare global {
  interface HTMLElementTagNameMap {
    'consentsoftware-cookieconsent': ConsentsoftwareCookieconsent;
  }
}

@customElement('consentsoftware-cookieconsent')
export class ConsentsoftwareCookieconsent extends LitElement {
  public static demo = () => html`<consentsoftware-cookieconsent></consentsoftware-cookieconsent>`;

  public csWebclientInstance = new csWebclient.CsWebclient();
  public csWebclientRan = false;

  // Reflects the current theme ('light' or 'dark')
  @property({ type: String, reflect: true })
  public accessor theme: 'light' | 'dark' = 'light';

  /**
   * Define component styles with CSS variables that adjust based on theme.
   * The default variables serve as baseline for the light theme.
   * Theme-specific overrides modify these for dark mode.
   */
  public static styles = css`
    :host {
      font-family: ${shared.fontStack};
      font-size: 14px;
      user-select: none;
      /* Shadcn-inspired Dark Theme (default) */
      --background: hsl(0 0% 7%);
      --foreground: hsl(0 0% 95%);
      --muted: hsl(0 0% 15%);
      --muted-foreground: hsl(0 0% 64%);
      --border: hsl(0 0% 18%);
      --input: hsl(0 0% 15%);
      --primary: hsl(0 0% 98%);
      --primary-foreground: hsl(0 0% 9%);
      --secondary: hsl(0 0% 15%);
      --secondary-foreground: hsl(0 0% 98%);
      --accent: hsl(0 0% 15%);
      --accent-foreground: hsl(0 0% 98%);
      --ring: hsl(0 0% 30%);
      --radius: 8px;
    }

    :host([theme='dark']) {
      --background: hsl(0 0% 7%);
      --foreground: hsl(0 0% 95%);
      --muted: hsl(0 0% 15%);
      --muted-foreground: hsl(0 0% 64%);
      --border: hsl(0 0% 18%);
      --input: hsl(0 0% 15%);
      --primary: hsl(0 0% 98%);
      --primary-foreground: hsl(0 0% 9%);
      --secondary: hsl(0 0% 15%);
      --secondary-foreground: hsl(0 0% 98%);
      --accent: hsl(0 0% 15%);
      --accent-foreground: hsl(0 0% 98%);
      --ring: hsl(0 0% 30%);
    }

    :host([theme='light']) {
      --background: hsl(0 0% 100%);
      --foreground: hsl(0 0% 9%);
      --muted: hsl(0 0% 96%);
      --muted-foreground: hsl(0 0% 45%);
      --border: hsl(0 0% 90%);
      --input: hsl(0 0% 90%);
      --primary: hsl(0 0% 9%);
      --primary-foreground: hsl(0 0% 98%);
      --secondary: hsl(0 0% 96%);
      --secondary-foreground: hsl(0 0% 9%);
      --accent: hsl(0 0% 96%);
      --accent-foreground: hsl(0 0% 9%);
      --ring: hsl(0 0% 64%);
    }

    .pageOverlay {
      position: fixed;
      inset: 0;
      display: grid;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      background: rgba(0, 0, 0, 0);
      backdrop-filter: blur(0px);
      transition: all 0.2s ease-out;
    }

    .pageOverlay.shake {
      background: rgba(0, 0, 0, 0.6) !important;
    }

    .modalBox {
      display: block;
      color: var(--foreground);
      background: var(--background);
      box-shadow:
        0 0 0 1px var(--border),
        0 16px 70px rgba(0, 0, 0, 0.35);
      position: relative;
      border-radius: var(--radius);
      max-width: 520px;
      min-width: 320px;
      box-sizing: border-box;
      overflow: hidden;
      will-change: transform;
      transition: all 0.2s ease-out;
      transform: scale(0.96);
      opacity: 0;
    }

    @media (max-width: 560px) {
      .modalBox {
        max-width: 100%;
        min-width: 100%;
        height: 100vh;
        border-radius: 0;
      }
    }

    .modalBox.shake {
      animation: shake 120ms 2 linear;
    }

    @keyframes shake {
      0% { transform: translateX(3px); }
      50% { transform: translateX(-3px); }
      100% { transform: translateX(0); }
    }

    :host([show='false']) { display: none; }
    :host([show='true']) { display: block; }

    .content {
      margin: auto;
    }

    .text-container {
      padding: 12px 16px;
      font-size: 0.9em;
      line-height: 1.5;
      color: var(--muted-foreground);
    }

    .text-container a {
      color: var(--foreground);
      text-decoration: underline;
      text-underline-offset: 2px;
    }

    .text-container a:hover {
      opacity: 0.8;
    }

    .button-container {
      padding: 12px 16px 16px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
    }

    @media (max-width: 560px) {
      .button-container {
        grid-template-columns: 1fr;
      }
    }

    .consent-button {
      border-radius: calc(var(--radius) - 2px);
      background: var(--secondary);
      border: 1px solid var(--border);
      padding: 8px 16px;
      font-size: 0.85em;
      font-weight: 500;
      text-align: center;
      cursor: pointer;
      transition: all 0.15s ease;
      color: var(--secondary-foreground);
    }

    .consent-button:hover {
      background: var(--accent);
      border-color: var(--ring);
    }

    .consent-button:last-child {
      background: var(--primary);
      color: var(--primary-foreground);
      border-color: var(--primary);
    }

    .consent-button:last-child:hover {
      opacity: 0.9;
    }

    .info-container {
      text-align: center;
      padding: 10px 16px;
      background: var(--muted);
      border-top: 1px solid var(--border);
      font-size: 0.75em;
      color: var(--muted-foreground);
    }

    .info-container a {
      color: var(--foreground);
      text-decoration: none;
    }

    .info-container a:hover {
      text-decoration: underline;
    }
  `;

  constructor() {
    super();
    // Initially hide the consent banner until needed
    this.setAttribute('show', 'false');
  }

  public render(): TemplateResult {
    return html`
      <div class="pageOverlay" @click=${this.pageOverlayClick}>
        <div class="modalBox">
          <div class="content">
            <consentsoftware-header></consentsoftware-header>
            <consentsoftware-tabs></consentsoftware-tabs>
            <div class="text-container">
              <div class="toptext">
                We use cookies to enhance your experience. Review our
                <a href="https://lossless.gmbh/cookie" target="_blank">cookie policy</a>
                and select your preferences.
              </div>
            </div>
            <consentsoftware-mainselection></consentsoftware-mainselection>
            <div class="button-container">
              <div
                class="consent-button"
                @click=${(event: MouseEvent) =>
                  this.handleConsentButtonClick(event, ['functional'])}
              >
                Deny
              </div>
              <div
                class="consent-button"
                @click=${(event: MouseEvent) =>
                  this.handleConsentButtonClick(event, ['functional', 'analytics'])}
              >
                Accept selection
              </div>
              <div
                class="consent-button"
                @click=${(event: MouseEvent) =>
                  this.handleConsentButtonClick(event, ['functional', 'analytics', 'marketing'])}
              >
                Accept all cookies
              </div>
            </div>
            <div class="info-container">
              consent management powered by
              <a href="https://consent.software">consent.software</a>
            </div>
          </div>
        </div>
      </div>
    `;
  }

  /**
   * Lifecycle method called when the element is connected to the DOM.
   * It sets up the theme and displays the consent banner if no cookie levels are set.
   */
  public async connectedCallback() {
    super.connectedCallback();
    this.updateTheme(); // Initialize theme based on system preference

    const cookieLevel = await this.csWebclientInstance.getCookieLevels();
    if (!cookieLevel) {
      // Show consent banner if cookie levels haven't been set yet
      this.setAttribute('show', 'true');
      requestAnimationFrame(async () => {
        await this.updated();
        const pageOverlay: HTMLDivElement = this.shadowRoot?.querySelector('.pageOverlay');
        if (pageOverlay) {
          // Apply subtle backdrop blur when modal appears
          pageOverlay.style.background = 'rgba(0,0,0, 0.6)';
          pageOverlay.style.backdropFilter = 'blur(4px)';
        }
        const modalBox: HTMLDivElement = this.shadowRoot?.querySelector('.modalBox');
        if (modalBox) {
          // Animate modal box appearance
          modalBox.style.transform = `scale(1)`;
          modalBox.style.opacity = '1';
        }
      });
    } else {
      // Hide banner if cookie levels are already set
      this.setAttribute('show', 'false');
    }
  }

  public async firstUpdated() {
    // Placeholder for any logic needed after first render
  }

  /**
   * Called after updates. Logs banner height and runs consent scripts if necessary.
   */
  public async updated() {
    console.log(`The height of the cookie banner is ${this.shadowRoot?.host?.clientHeight}px`);
    const acceptedCookieLevels = await this.csWebclientInstance.getCookieLevels();
    if (!this.csWebclientRan && acceptedCookieLevels) {
      this.csWebclientRan = true;
      await this.csWebclientInstance.getAndRunConsentTuples();
    }
  }

  /**
   * Handles consent button clicks, sets cookie levels, and hides the banner.
   * Uses theme variables for styling transitions.
   */
  private async handleConsentButtonClick(
    event: MouseEvent,
    levelsArg: csInterfaces.TCookieLevel[]
  ) {
    console.log(`Set level to ${levelsArg}`);
    const pageOverlay: HTMLDivElement = this.shadowRoot?.querySelector('.pageOverlay');
    if (pageOverlay) {
      pageOverlay.style.background = 'rgba(0,0,0, 0)';
      pageOverlay.style.backdropFilter = 'blur(0px)';
    }
    const modalBox: HTMLDivElement = this.shadowRoot?.querySelector('.modalBox');
    if (modalBox) {
      // Scale down and fade out modal box before hiding
      modalBox.style.transform = `scale(0.95)`;
      modalBox.style.opacity = '0';
    }
    // Save user consent preferences
    await this.csWebclientInstance.setCookieLevels(levelsArg);
    await delayFor(300);
    this.setAttribute('show', 'false'); // Hide the consent banner
    this.updated(); // Trigger any post-consent actions
  }

  /**
   * Handles clicks on the page overlay. If clicked outside the modal,
   * triggers a shake animation as feedback.
   */
  private async pageOverlayClick(e: MouseEvent) {
    if (e.target === e.currentTarget) {
      const pageOverlay: HTMLDivElement = this.shadowRoot?.querySelector('.pageOverlay');
      const modalBox: HTMLDivElement = this.shadowRoot?.querySelector('.modalBox');
      if (pageOverlay && modalBox) {
        pageOverlay.classList.add('shake');
        modalBox.classList.add('shake');
        await delayFor(2000);
        pageOverlay.classList.remove('shake');
        modalBox.classList.remove('shake');
      }
    }
  }

  /**
   * Dynamically switches the theme between light and dark.
   * Listens for system theme changes to update the component's theme.
   */
  private updateTheme() {
    // Check the initial system preference for dark mode
    const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
    this.theme = prefersDark ? 'dark' : 'light';

    // Listen for changes in the system color scheme preference
    window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', (e) => {
      this.theme = e.matches ? 'dark' : 'light';
    });
  }
}