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

// Import design tokens
import { colors, bdTheme } from './00colors.js';
import { spacing, radius, shadows, transitions } from './00tokens.js';
import { fontFamilies, typography } from './00fonts.js';

// Types
export interface IConversation {
  id: string;
  title: string;
  lastMessage: string;
  time: string;
  unread?: boolean;
  avatar?: string;
}

declare global {
  interface HTMLElementTagNameMap {
    'sio-conversation-selector': SioConversationSelector;
  }
}

@customElement('sio-conversation-selector')
export class SioConversationSelector extends DeesElement {
  public static demo = () => html`
    <sio-conversation-selector style="width: 320px; height: 600px;"></sio-conversation-selector>
  `;

  @property({ type: Array })
  public accessor conversations: IConversation[] = [];

  @property({ type: String })
  public accessor selectedConversationId: string | null = null;

  @state()
  private accessor searchQuery: string = '';

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        display: flex;
        flex-direction: column;
        height: 100%;
        background: ${bdTheme('card')};
        border-right: 1px solid ${bdTheme('border')};
        font-family: ${unsafeCSS(fontFamilies.sans)};
      }

      .header {
        padding: ${unsafeCSS(spacing["5"])} ${unsafeCSS(spacing["4"])};
        border-bottom: 1px solid ${bdTheme('border')};
        background: ${bdTheme('background')};
      }

      .header-top {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: ${unsafeCSS(spacing["4"])};
      }

      .title {
        font-size: 1.25rem;
        line-height: 1.2;
        font-weight: 600;
        margin: 0;
        color: ${bdTheme('foreground')};
        letter-spacing: -0.025em;
      }

      .search-box {
        position: relative;
      }

      .search-input {
        width: 100%;
        padding: ${unsafeCSS(spacing["2.5"])} ${unsafeCSS(spacing["10"])} ${unsafeCSS(spacing["2.5"])} ${unsafeCSS(spacing["3"])};
        background: ${bdTheme('background')};
        border: 1px solid ${bdTheme('border')};
        border-radius: ${unsafeCSS(radius.lg)};
        font-size: 0.875rem;
        color: ${bdTheme('foreground')};
        outline: none;
        transition: ${unsafeCSS(transitions.all)};
        font-family: ${unsafeCSS(fontFamilies.sans)};
        box-shadow: ${unsafeCSS(shadows.sm)};
      }

      .search-input::placeholder {
        color: ${bdTheme('mutedForeground')};
        font-weight: 400;
      }

      .search-input:focus {
        border-color: ${bdTheme('ring')};
        box-shadow: 0 0 0 3px ${bdTheme('ring')}20;
        background: ${bdTheme('background')};
      }

      .search-icon {
        position: absolute;
        right: ${unsafeCSS(spacing["3"])};
        top: 50%;
        transform: translateY(-50%);
        color: ${bdTheme('mutedForeground')};
      }

      .conversation-list {
        flex: 1;
        overflow-y: auto;
        padding: ${unsafeCSS(spacing["2"])};
      }

      .conversation-item {
        padding: ${unsafeCSS(spacing["3.5"])};
        margin-bottom: ${unsafeCSS(spacing["1.5"])};
        background: ${bdTheme('background')};
        border: 1px solid transparent;
        border-radius: ${unsafeCSS(radius.lg)};
        cursor: pointer;
        transition: ${unsafeCSS(transitions.all)};
        position: relative;
      }

      .conversation-item:hover {
        background: ${bdTheme('accent')};
        transform: translateX(2px);
        box-shadow: ${unsafeCSS(shadows.sm)};
      }

      .conversation-item.selected {
        background: ${bdTheme('accent')};
        border-color: ${bdTheme('border')};
        box-shadow: ${unsafeCSS(shadows.sm)};
      }
      
      .conversation-item.selected::before {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 3px;
        height: 60%;
        background: ${bdTheme('primary')};
        border-radius: 0 3px 3px 0;
        animation: slideIn 200ms ease-out;
      }
      
      @keyframes slideIn {
        from {
          width: 0;
          opacity: 0;
        }
        to {
          width: 3px;
          opacity: 1;
        }
      }

      .conversation-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: ${unsafeCSS(spacing["1"])};
      }

      .conversation-title {
        font-weight: 500;
        color: ${bdTheme('foreground')};
        display: flex;
        align-items: center;
        gap: ${unsafeCSS(spacing["2"])};
        font-size: 0.9375rem;
        letter-spacing: -0.01em;
      }

      .conversation-time {
        font-size: 0.75rem;
        line-height: 1.5;
        color: ${bdTheme('mutedForeground')};
        opacity: 0.8;
      }

      .conversation-preview {
        font-size: 0.8125rem;
        line-height: 1.5;
        color: ${bdTheme('mutedForeground')};
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        margin-top: ${unsafeCSS(spacing["0.5"])};
      }

      .unread-dot {
        display: inline-block;
        width: 6px;
        height: 6px;
        background: ${bdTheme('primary')};
        border-radius: 50%;
        animation: pulse 2s ease-in-out infinite;
        box-shadow: 0 0 0 0 ${bdTheme('primary')};
      }
      
      @keyframes pulse {
        0% {
          opacity: 1;
          transform: scale(1);
          box-shadow: 0 0 0 0 ${bdTheme('primary')}40;
        }
        50% {
          opacity: 0.9;
          transform: scale(1.05);
          box-shadow: 0 0 0 4px ${bdTheme('primary')}00;
        }
        100% {
          opacity: 1;
          transform: scale(1);
          box-shadow: 0 0 0 0 ${bdTheme('primary')}00;
        }
      }

      .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100%;
        padding: ${unsafeCSS(spacing["4"])};
        text-align: center;
        color: ${bdTheme('mutedForeground')};
        gap: ${unsafeCSS(spacing["3"])};
      }

      .empty-icon {
        font-size: 48px;
        opacity: 0.5;
      }

      /* Scrollbar styling */
      .conversation-list::-webkit-scrollbar {
        width: 6px;
      }

      .conversation-list::-webkit-scrollbar-track {
        background: transparent;
      }

      .conversation-list::-webkit-scrollbar-thumb {
        background: ${bdTheme('border')};
        border-radius: 3px;
      }

      .conversation-list::-webkit-scrollbar-thumb:hover {
        background: ${bdTheme('mutedForeground')};
      }

      .close-button {
        display: none;
      }
    `,
    // Mobile: show close button
    cssManager.cssForPhablet(css`
      .close-button {
        display: flex;
      }
    `),
  ];

  public render(): TemplateResult {
    const filteredConversations = this.conversations.filter(conv =>
      conv.title.toLowerCase().includes(this.searchQuery.toLowerCase()) ||
      conv.lastMessage.toLowerCase().includes(this.searchQuery.toLowerCase())
    );

    return html`
      <div class="header">
        <div class="header-top">
          <sio-button
            class="close-button"
            type="ghost"
            size="sm"
            @click=${() => this.handleClose()}
          >
            <sio-icon icon="x" size="20"></sio-icon>
          </sio-button>
          <h2 class="title">Messages</h2>
          <sio-button
            type="primary"
            size="sm"
            @click=${() => this.startNewConversation()}
          >
            <sio-icon icon="plus" size="16"></sio-icon>
            New
          </sio-button>
        </div>
        <div class="search-box">
          <input
            type="text"
            class="search-input"
            placeholder="Search conversations..."
            .value=${this.searchQuery}
            @input=${(e: Event) => this.searchQuery = (e.target as HTMLInputElement).value}
            @focus=${this.handleInputFocus}
            @blur=${this.handleInputBlur}
          />
          <sio-icon class="search-icon" icon="search" size="16"></sio-icon>
        </div>
      </div>
      
      ${filteredConversations.length > 0 ? html`
        <div class="conversation-list">
          ${filteredConversations.map(conv => html`
            <div
              class="conversation-item ${this.selectedConversationId === conv.id ? 'selected' : ''}"
              @click=${() => this.selectConversation(conv)}
            >
              <div class="conversation-header">
                <span class="conversation-title">
                  ${conv.title}
                  ${conv.unread ? html`<span class="unread-dot"></span>` : ''}
                </span>
                <span class="conversation-time">${conv.time}</span>
              </div>
              <div class="conversation-preview">${conv.lastMessage}</div>
            </div>
          `)}
        </div>
      ` : html`
        <div class="empty-state">
          <sio-icon class="empty-icon" icon="message-square"></sio-icon>
          <h3>${this.searchQuery ? 'No matching conversations' : 'No conversations yet'}</h3>
          <p>${this.searchQuery ? 'Try a different search term' : 'Start a new conversation to get started'}</p>
        </div>
      `}
    `;
  }

  private selectConversation(conversation: IConversation) {
    this.selectedConversationId = conversation.id;
    
    // Dispatch event for parent components
    this.dispatchEvent(new CustomEvent('conversation-selected', {
      detail: { conversation },
      bubbles: true,
      composed: true
    }));
  }

  private startNewConversation() {
    // Dispatch event for parent components to handle new conversation creation
    this.dispatchEvent(new CustomEvent('new-conversation', {
      bubbles: true,
      composed: true
    }));
  }

  private handleClose() {
    this.dispatchEvent(new CustomEvent('close', {
      bubbles: true,
      composed: true
    }));
  }

  private handleInputFocus() {
    setTimeout(() => {
      this.dispatchEvent(new CustomEvent('input-focus', {
        bubbles: true,
        composed: true
      }));
    }, 50);
  }

  private handleInputBlur() {
    this.dispatchEvent(new CustomEvent('input-blur', {
      bubbles: true,
      composed: true
    }));
  }
}