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';

declare global {
  interface HTMLElementTagNameMap {
    'sio-message-input': SioMessageInput;
  }
}

@customElement('sio-message-input')
export class SioMessageInput extends DeesElement {
  public static demo = () => html`
    <sio-message-input style="width: 600px;"></sio-message-input>
  `;

  @property({ type: String })
  public accessor placeholder: string = 'Type a message...';

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

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

  @state()
  private accessor pendingAttachments: File[] = [];

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        display: block;
        font-family: ${unsafeCSS(fontFamilies.sans)};
      }

      .input-container {
        display: flex;
        align-items: flex-end;
        background: ${bdTheme('secondary')};
        border: 1px solid ${bdTheme('border')};
        border-radius: 24px;
        padding: 2px;
        transition: all 200ms ease;
        overflow: hidden;
      }

      .input-container:focus-within {
        border-color: ${bdTheme('ring')};
        background: ${bdTheme('background')};
      }

      .message-input {
        flex: 1;
        min-height: 44px;
        max-height: 120px;
        padding: 12px 16px;
        background: transparent;
        border: none;
        font-size: 15px;
        color: ${bdTheme('foreground')};
        outline: none;
        resize: none;
        font-family: ${unsafeCSS(fontFamilies.sans)};
        line-height: 1.5;
      }

      .message-input::placeholder {
        color: ${bdTheme('mutedForeground')};
      }

      .action-buttons {
        display: flex;
        gap: 4px;
        align-items: center;
        padding-right: 2px;
      }

      .action-button {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        border: none;
        background: transparent;
        color: ${bdTheme('mutedForeground')};
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 120ms ease;
        position: relative;
        outline: none;
      }

      .action-button:hover {
        color: ${bdTheme('foreground')};
        background: ${bdTheme('hsl(0 0% 0% / 0.05)', 'hsl(0 0% 100% / 0.05)')};
      }

      .action-button:active {
        transform: scale(0.95);
      }

      .action-button.attachment {
        opacity: 0.7;
      }

      .action-button.attachment:hover {
        opacity: 1;
      }

      .action-button.send {
        background: ${bdTheme('primary')};
        color: white;
        margin-left: 2px;
      }

      .action-button.send:hover {
        background: ${bdTheme('hsl(221 83% 49%)', 'hsl(217 91% 65%)')};
      }

      .action-button.send:disabled {
        opacity: 0.3;
        cursor: not-allowed;
      }

      .action-button.send:disabled:hover {
        background: ${bdTheme('primary')};
        transform: none;
      }

      .file-input {
        display: none;
      }

      /* Icon styles */
      sio-icon {
        width: 20px;
        height: 20px;
      }

      .action-button.send sio-icon {
        width: 18px;
        height: 18px;
      }
    `,
  ];

  public render(): TemplateResult {
    return html`
      <div class="input-container">
        <textarea
          class="message-input"
          placeholder="${this.placeholder}"
          .value=${this.messageText}
          @input=${this.handleInput}
          @keydown=${this.handleKeyDown}
          ?disabled=${this.disabled}
          rows="1"
        ></textarea>
        
        <div class="action-buttons">
          <input
            type="file"
            class="file-input"
            id="fileInput"
            multiple
            accept="image/*,.pdf,.doc,.docx,.txt"
            @change=${this.handleFileSelect}
          />
          <button 
            class="action-button attachment"
            @click=${this.openFileSelector}
            ?disabled=${this.disabled}
          >
            <sio-icon icon="paperclip"></sio-icon>
          </button>
          <button
            class="action-button send"
            ?disabled=${!this.messageText.trim() || this.disabled}
            @click=${this.sendMessage}
          >
            <sio-icon icon="send"></sio-icon>
          </button>
        </div>
      </div>
    `;
  }

  private handleInput(event: Event) {
    const textarea = event.target as HTMLTextAreaElement;
    this.messageText = textarea.value;
    
    // Auto-resize textarea
    textarea.style.height = 'auto';
    textarea.style.height = `${textarea.scrollHeight}px`;
  }

  private handleKeyDown(event: KeyboardEvent) {
    if (event.key === 'Enter' && !event.shiftKey) {
      event.preventDefault();
      this.sendMessage();
    }
  }

  private sendMessage() {
    if (!this.messageText.trim() && this.pendingAttachments.length === 0) {
      return;
    }

    this.dispatchEvent(new CustomEvent('send-message', {
      detail: {
        text: this.messageText,
        attachments: this.pendingAttachments
      },
      bubbles: true,
      composed: true
    }));

    // Clear input
    this.messageText = '';
    this.pendingAttachments = [];
    
    // Reset textarea height
    const textarea = this.shadowRoot?.querySelector('.message-input') as HTMLTextAreaElement;
    if (textarea) {
      textarea.style.height = 'auto';
    }
  }

  private openFileSelector() {
    const fileInput = this.shadowRoot?.querySelector('#fileInput') as HTMLInputElement;
    if (fileInput) {
      fileInput.click();
    }
  }

  private handleFileSelect(event: Event) {
    const input = event.target as HTMLInputElement;
    const files = Array.from(input.files || []);
    
    this.pendingAttachments = [...this.pendingAttachments, ...files];
    
    this.dispatchEvent(new CustomEvent('files-selected', {
      detail: { files },
      bubbles: true,
      composed: true
    }));
    
    input.value = ''; // Clear input for re-selection
  }

  public focus() {
    const textarea = this.shadowRoot?.querySelector('.message-input') as HTMLTextAreaElement;
    textarea?.focus();
  }

  public clear() {
    this.messageText = '';
    this.pendingAttachments = [];
    const textarea = this.shadowRoot?.querySelector('.message-input') as HTMLTextAreaElement;
    if (textarea) {
      textarea.style.height = 'auto';
    }
  }
}