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

import { mobileComponentStyles } from '../../00componentstyles.js';
import { demoFunc } from './dees-mobile-applayout.demo.js';

export type TNavigationDirection = 'forward' | 'back' | 'none';

declare global {
  interface HTMLElementTagNameMap {
    'dees-mobile-applayout': DeesMobileApplayout;
  }
}

@customElement('dees-mobile-applayout')
export class DeesMobileApplayout extends DeesElement {
  public static demo = demoFunc;

  @property({ type: Boolean, reflect: true, attribute: 'keyboard-visible' })
  accessor keyboardVisible: boolean = false;

  @property({ type: Boolean })
  accessor showNavigation: boolean = true;

  @property({ type: Boolean })
  accessor isIOS: boolean = false;

  @property({ type: Boolean })
  accessor isPWA: boolean = false;

  @state()
  accessor navigationDirection: TNavigationDirection = 'none';

  @state()
  accessor isTransitioning: boolean = false;

  private keyboardBlurTimeout?: number;

  public static styles = [
    cssManager.defaultStyles,
    mobileComponentStyles,
    css`
      :host {
        display: flex;
        flex-direction: column;
        min-height: 100vh;
        background: var(--dees-background);
      }

      .app-layout {
        display: grid;
        grid-template-rows: auto 1fr auto;
        grid-template-areas:
          "spacer"
          "content"
          "navigation";
        height: 100vh;
        overflow: hidden;
      }

      .ios-keyboard-spacer {
        grid-area: spacer;
        height: 0;
        transition: height 300ms ease-out;
        background: var(--dees-background);
      }

      .ios-keyboard-spacer.active {
        height: 340px;
      }

      /* Mobile-first: smooth scrolling behavior for keyboard visibility */
      :host([keyboard-visible]) .main-content {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
      }

      /* Main content area */
      .main-content {
        grid-area: content;
        overflow: hidden;
        position: relative;
      }

      /* View transition container */
      .view-container {
        position: relative;
        width: 100%;
        height: 100%;
        overflow: hidden;
      }

      .view-wrapper {
        position: absolute;
        inset: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        will-change: transform, opacity;
      }

      /* Forward navigation: entering view slides from right */
      .view-wrapper.entering.forward {
        animation: slideInFromRight 300ms ease-out forwards;
      }

      /* Forward navigation: exiting view slides to left with fade */
      .view-wrapper.exiting.forward {
        animation: slideOutToLeft 300ms ease-out forwards;
      }

      /* Back navigation: entering view slides from left */
      .view-wrapper.entering.back {
        animation: slideInFromLeft 300ms ease-out forwards;
      }

      /* Back navigation: exiting view slides to right */
      .view-wrapper.exiting.back {
        animation: slideOutToRight 300ms ease-out forwards;
      }

      /* No animation */
      .view-wrapper.entering.none {
        opacity: 1;
        transform: none;
      }

      @keyframes slideInFromRight {
        from {
          transform: translateX(100%);
        }
        to {
          transform: translateX(0);
        }
      }

      @keyframes slideOutToLeft {
        from {
          transform: translateX(0);
          opacity: 1;
        }
        to {
          transform: translateX(-30%);
          opacity: 0;
        }
      }

      @keyframes slideInFromLeft {
        from {
          transform: translateX(-100%);
        }
        to {
          transform: translateX(0);
        }
      }

      @keyframes slideOutToRight {
        from {
          transform: translateX(0);
        }
        to {
          transform: translateX(100%);
        }
      }

      /* Bottom navigation */
      .navigation-slot {
        grid-area: navigation;
        z-index: var(--dees-z-sticky, 200);
      }

      /* Mobile-first: hide bottom navigation when keyboard is visible */
      :host([keyboard-visible]) .navigation-slot {
        display: none;
      }

      /* Desktop: show navigation even with keyboard */
      @media (min-width: 641px) {
        :host([keyboard-visible]) .navigation-slot {
          display: block;
        }
      }

      /* Mobile-first: allow overflow during drag */
      :host-context(body.dragging) .app-layout {
        overflow: visible !important;
      }

      :host-context(body.dragging) .main-content {
        overflow: visible !important;
      }

      /* Desktop: maintain normal overflow behavior during drag */
      @media (min-width: 641px) {
        :host-context(body.dragging) .app-layout {
          overflow: hidden;
        }

        :host-context(body.dragging) .main-content {
          overflow-y: auto;
        }
      }

      .loading {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 300px;
        color: var(--dees-muted-foreground);
      }

      .spinner {
        width: 3rem;
        height: 3rem;
        border: 3px solid var(--dees-border);
        border-top-color: var(--dees-primary);
        border-radius: 50%;
        animation: spin 0.8s linear infinite;
      }

      @keyframes spin {
        to { transform: rotate(360deg); }
      }
    `,
  ];

  async connectedCallback() {
    await super.connectedCallback();

    // Listen for keyboard events
    this.addEventListener('input-focus', this.handleInputFocus as EventListener);
    this.addEventListener('input-blur', this.handleInputBlur as EventListener);

    // Detect iOS PWA
    this.detectEnvironment();

    // Listen for viewport changes to detect keyboard (iOS PWA only)
    if (this.isIOS && this.isPWA && 'visualViewport' in window) {
      window.visualViewport?.addEventListener('resize', this.handleViewportResize);
      this.handleViewportResize();
    }
  }

  async disconnectedCallback() {
    await super.disconnectedCallback();
    this.removeEventListener('input-focus', this.handleInputFocus as EventListener);
    this.removeEventListener('input-blur', this.handleInputBlur as EventListener);

    if (this.isIOS && this.isPWA && 'visualViewport' in window) {
      window.visualViewport?.removeEventListener('resize', this.handleViewportResize);
    }
  }

  private detectEnvironment() {
    // Detect iOS
    const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) ||
      (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);

    // Detect PWA mode
    const isPWA = window.matchMedia('(display-mode: standalone)').matches ||
      (window.navigator as any).standalone === true;

    this.isIOS = isIOS;
    this.isPWA = isPWA;
  }

  private handleInputFocus = () => {
    if (this.keyboardBlurTimeout) {
      clearTimeout(this.keyboardBlurTimeout);
      this.keyboardBlurTimeout = undefined;
    }

    if (window.innerWidth <= 640) {
      this.keyboardVisible = true;
    }
  };

  private handleInputBlur = () => {
    if (this.keyboardBlurTimeout) {
      clearTimeout(this.keyboardBlurTimeout);
    }

    if (window.innerWidth <= 640) {
      this.keyboardBlurTimeout = window.setTimeout(() => {
        this.keyboardVisible = false;
        this.keyboardBlurTimeout = undefined;
      }, 150);
    }
  };

  private handleViewportResize = () => {
    if (window.visualViewport) {
      const viewport = window.visualViewport;
      const keyboardHeight = window.innerHeight - viewport.height;

      if (keyboardHeight > 50) {
        this.keyboardVisible = true;
      } else {
        this.keyboardVisible = false;
      }
    }
  };

  /**
   * Navigate with animation transition
   * Call this method when changing views
   */
  public navigateWithTransition(direction: TNavigationDirection) {
    if (this.isTransitioning) return;

    this.navigationDirection = direction;
    this.isTransitioning = true;

    // Clear transition state after animation
    setTimeout(() => {
      this.isTransitioning = false;
      this.navigationDirection = 'none';
    }, 300);
  }

  public render(): TemplateResult {
    const showKeyboardSpacer = this.keyboardVisible && this.isIOS && this.isPWA;

    return html`
      <div class="app-layout">
        <div class="ios-keyboard-spacer ${showKeyboardSpacer ? 'active' : ''}"></div>

        <main class="main-content">
          <div class="view-container">
            <div class="view-wrapper entering ${this.navigationDirection}">
              <slot></slot>
            </div>
          </div>
        </main>

        ${this.showNavigation ? html`
          <div class="navigation-slot">
            <slot name="navigation"></slot>
          </div>
        ` : ''}
      </div>
    `;
  }
}