/**
 * Search Bar Component
 * Search input with icon
 */
class SearchBar extends HTMLElement {
  constructor() {
    super();
    this.attachShadow({ mode: 'open' });
  }

  connectedCallback() {
    this.render();
    this.addEventListeners();
  }

  addEventListeners() {
    const input = this.shadowRoot.querySelector('.search-input');
    const form = this.shadowRoot.querySelector('.search-form');

    form.addEventListener('submit', (e) => {
      e.preventDefault();
      this.dispatchEvent(new CustomEvent('search', {
        detail: { query: input.value },
        bubbles: true,
        composed: true
      }));
    });

    input.addEventListener('input', (e) => {
      this.dispatchEvent(new CustomEvent('search-input', {
        detail: { query: e.target.value },
        bubbles: true,
        composed: true
      }));
    });
  }

  render() {
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
        }

        .search-form {
          display: flex;
          align-items: center;
          position: relative;
        }

        .search-icon {
          position: absolute;
          left: var(--spacing-md, 1rem);
          width: 20px;
          height: 20px;
          color: var(--color-text-light, #64748b);
          pointer-events: none;
        }

        .search-input {
          width: 100%;
          padding: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
          padding-left: calc(var(--spacing-md, 1rem) + 20px + var(--spacing-sm, 0.5rem));
          font-size: var(--font-size-sm, 0.875rem);
          color: var(--color-text, #1e293b);
          background-color: var(--color-background-tertiary, #f1f5f9);
          border: 1px solid transparent;
          border-radius: var(--radius-lg, 0.75rem);
          outline: none;
          transition: all var(--transition-fast, 150ms ease);
        }

        .search-input::placeholder {
          color: var(--color-text-light, #64748b);
        }

        .search-input:focus {
          background-color: var(--color-background, #ffffff);
          border-color: var(--color-primary, #2563eb);
          box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
      </style>
      <form class="search-form" role="search">
        <svg class="search-icon" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor">
          <path stroke-linecap="round" stroke-linejoin="round" d="m21 21-5.197-5.197m0 0A7.5 7.5 0 1 0 5.196 5.196a7.5 7.5 0 0 0 10.607 10.607Z" />
        </svg>
        <input 
          type="search" 
          class="search-input" 
          placeholder="Search books, authors..."
          aria-label="Search books and authors"
        >
      </form>
    `;
  }
}

customElements.define('search-bar', SearchBar);