import { LitElement, html, css } from 'lit';
import { StorageStore } from 'storage-store';

class StorageEditor extends LitElement {
  static styles = css`
    :host {
      display: block;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
      width: 100%;
      margin: 0 auto;
      padding: 20px;
      background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
      min-height: 100vh;
      box-sizing: border-box;
    }
    .container {
      padding: 20px;
    }

    .header {
      text-align: center;
      margin-bottom: 40px;
      padding: 30px;
      background: white;
      border-radius: 20px;
      box-shadow: 0 8px 32px rgba(0,0,0,0.1);
      backdrop-filter: blur(10px);
    }

    .header h1 {
      color: #2d3748;
      margin: 0 0 12px 0;
      font-size: 2.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .header p {
      color: #718096;
      margin: 0;
      font-size: 1.1rem;
      font-weight: 400;
    }

    .storage-selector {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-bottom: 40px;
    }

    .storage-btn {
      padding: 16px 32px;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      font-size: 1.1rem;
      font-weight: 600;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      background: white;
      color: #4a5568;
      box-shadow: 0 4px 16px rgba(0,0,0,0.08);
      position: relative;
      overflow: hidden;
    }

    .storage-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .storage-btn:hover {
      transform: translateY(-4px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    }

    .storage-btn:hover::before {
      opacity: 0.1;
    }

    .storage-btn.active {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    }

    .storage-btn.active::before {
      opacity: 0;
    }

    .add-section {
      background: white;
      border-radius: 20px;
      padding: 30px;
      margin-bottom: 30px;
      box-shadow: 0 8px 32px rgba(0,0,0,0.1);
      backdrop-filter: blur(10px);
    }

    .add-section h3 {
      margin: 0 0 20px 0;
      color: #2d3748;
      font-size: 1.4rem;
      font-weight: 600;
    }

    .add-form {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .input-group {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .input-group label {
      font-weight: 600;
      color: #4a5568;
      font-size: 0.9rem;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

    .input-group input,
    .input-group textarea {
      padding: 14px 16px;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      font-size: 1rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      background: #f8fafc;
      color: #2d3748;
      font-family: inherit;
      resize: vertical;
    }

    .input-group textarea {
      min-height: 80px;
      max-height: 200px;
      line-height: 1.5;
    }

    .input-group input:focus,
    .input-group textarea:focus {
      outline: none;
      border-color: #667eea;
      background: white;
      box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }

    .input-group input::placeholder,
    .input-group textarea::placeholder {
      color: #a0aec0;
    }

    .add-btn {
      padding: 16px 32px;
      background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
      color: white;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      font-size: 1.1rem;
      font-weight: 600;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 16px rgba(72, 187, 120, 0.3);
      align-self: flex-end;
      margin-top: 8px;
    }

    .add-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(72, 187, 120, 0.4);
    }

    .add-btn:active {
      transform: translateY(0);
    }

    .storage-list {
      background: white;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 8px 32px rgba(0,0,0,0.1);
      backdrop-filter: blur(10px);
    }

    .list-header {
      background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
      padding: 20px 30px;
      border-bottom: 1px solid #e2e8f0;
    }

    .list-header h3 {
      margin: 0;
      color: #2d3748;
      font-size: 1.3rem;
      font-weight: 600;
    }

    .empty-state {
      text-align: center;
      padding: 60px 20px;
      color: #a0aec0;
      font-size: 1.1rem;
      font-weight: 500;
    }

    .storage-item {
      padding: 20px 30px;
      border-bottom: 1px solid #f1f5f9;
      display: flex;
      align-items: center;
      gap: 20px;
      transition: background 0.3s ease;
    }

    .storage-item:hover {
      background: #f8fafc;
    }

    .storage-item:last-child {
      border-bottom: none;
    }

    .item-key {
      font-weight: 700;
      color: #2d3748;
      min-width: 180px;
      word-break: break-all;
      background: linear-gradient(135deg, #edf2f7 0%, #e2e8f0 100%);
      padding: 8px 12px;
      border-radius: 8px;
      font-size: 0.9rem;
    }

    .item-value {
      flex: 1;
      display: flex;
      gap: 12px;
      align-items: center;
    }

    .value-input {
      flex: 1;
      padding: 12px 16px;
      border: 2px solid #e2e8f0;
      border-radius: 10px;
      font-size: 0.95rem;
      background: #f8fafc;
      color: #2d3748;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      min-height: 60px;
      resize: vertical;
      font-family: inherit;
      line-height: 1.5;
    }

    .value-input:focus {
      outline: none;
      border-color: #667eea;
      background: white;
      box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }

    .item-actions {
      display: flex;
      gap: 10px;
    }

    .action-btn {
      padding: 8px 16px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      font-size: 0.85rem;
      font-weight: 600;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .save-btn {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    }

    .save-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    }

    .delete-btn {
      background: linear-gradient(135deg, #fc8181 0%, #f56565 100%);
      color: white;
      box-shadow: 0 2px 8px rgba(252, 129, 129, 0.3);
    }

    .delete-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(252, 129, 129, 0.4);
    }

    .clear-all-btn {
      background: linear-gradient(135deg, #fc8181 0%, #f56565 100%);
      color: white;
      padding: 14px 28px;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      font-size: 1rem;
      font-weight: 600;
      margin: 20px 30px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 16px rgba(252, 129, 129, 0.3);
    }

    .clear-all-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(252, 129, 129, 0.4);
    }

    .stats {
      display: flex;
      justify-content: space-between;
      padding: 20px 30px;
      background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
      border-top: 1px solid #e2e8f0;
      font-size: 0.95rem;
      color: #4a5568;
      font-weight: 500;
    }

    @media (max-width: 768px) {
      :host {
        padding: 16px;
      }

      .header {
        padding: 20px;
        margin-bottom: 30px;
      }

      .header h1 {
        font-size: 2rem;
      }

      .storage-selector {
        flex-direction: column;
        gap: 16px;
        margin-bottom: 30px;
      }

      .storage-btn {
        width: 100%;
        padding: 16px;
      }

      .add-section {
        padding: 24px;
      }

      .add-form {
        flex-direction: column;
        gap: 20px;
      }
      
      .storage-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 20px;
      }

      .item-key {
        min-width: auto;
        width: 100%;
      }
      
      .item-value {
        width: 100%;
      }

      .item-actions {
        width: 100%;
        justify-content: flex-end;
      }

      .list-header {
        padding: 16px 20px;
      }

      .stats {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 16px 20px;
      }

      .clear-all-btn {
        margin: 16px 20px;
        width: calc(100% - 40px);
      }
    }

    @media (max-width: 480px) {
      .header h1 {
        font-size: 1.8rem;
      }

      .add-section {
        padding: 20px;
      }

      .storage-item {
        padding: 16px;
      }

      .item-actions {
        flex-direction: column;
        gap: 8px;
      }

      .action-btn {
        width: 100%;
        padding: 10px;
      }
    }
  `;

  static properties = {
    currentStorageType: { type: String },
    storageItems: { type: Array },
    newKey: { type: String },
    newValue: { type: String }
  };

  constructor() {
    super();
    this.currentStorageType = 'localStorage';
    this.storageItems = [];
    this.newKey = '';
    this.newValue = '';
    this.localStorageStore = new StorageStore(localStorage);
    this.sessionStorageStore = new StorageStore(sessionStorage);
  }

  connectedCallback() {
    super.connectedCallback();
    this.loadStorageItems();
  }

  get currentStore() {
    return this.currentStorageType === 'localStorage' 
      ? this.localStorageStore 
      : this.sessionStorageStore;
  }

  loadStorageItems() {
    this.storageItems = this.currentStore.getAllItemsAsArray();
    this.requestUpdate();
  }

  switchStorageType(type) {
    this.currentStorageType = type;
    this.loadStorageItems();
  }

  addItem() {
    if (this.newKey && this.newValue) {
      this.currentStore.setItem(this.newKey, this.newValue);
      this.newKey = '';
      this.newValue = '';
      this.loadStorageItems();
    }
  }

  updateItem(key, value) {
    this.currentStore.setItem(key, value);
    this.loadStorageItems();
  }

  deleteItem(key) {
    this.currentStore.removeItem(key);
    this.loadStorageItems();
  }

  clearAll() {
    if (confirm(`确定要清空所有 ${this.currentStorageType} 数据吗？`)) {
      this.currentStore.clear();
      this.loadStorageItems();
    }
  }

  render() {
    return html`
    <div class="container">
      <div class="header">
        <h1>Storage Editor</h1>
        <p>管理您的本地存储和会话存储数据</p>
      </div>

      <div class="storage-selector">
        <button 
          class="storage-btn ${this.currentStorageType === 'localStorage' ? 'active' : ''}"
          @click=${() => this.switchStorageType('localStorage')}>
          Local Storage
        </button>
        <button 
          class="storage-btn ${this.currentStorageType === 'sessionStorage' ? 'active' : ''}"
          @click=${() => this.switchStorageType('sessionStorage')}>
          Session Storage
        </button>
      </div>

      <div class="add-section">
        <h3>添加新项目</h3>
        <div class="add-form">
          <div class="input-group">
            <label for="key">Key</label>
            <input 
              id="key"
              type="text" 
              placeholder="输入键名"
              .value=${this.newKey}
              @input=${(e) => this.newKey = e.target.value}
              @keydown=${(e) => e.key === 'Enter' && this.addItem()}
            />
          </div>
          <div class="input-group">
            <label for="value">Value</label>
            <textarea 
              id="value"
              placeholder="输入值"
              .value=${this.newValue}
              @input=${(e) => this.newValue = e.target.value}
              @keydown=${(e) => e.key === 'Enter' && e.ctrlKey && this.addItem()}
            ></textarea>
          </div>
          <button class="add-btn" @click=${this.addItem}>
            添加
          </button>
        </div>
      </div>

      <div class="storage-list">
        <div class="list-header">
          <h3>${this.currentStorageType === 'localStorage' ? 'Local Storage' : 'Session Storage'} 项目</h3>
        </div>
        
        ${this.storageItems.length === 0 ? html`
          <div class="empty-state">
            暂无数据
          </div>
        ` : html`
          ${this.storageItems.map(item => html`
            <div class="storage-item">
              <div class="item-key">${item.key}</div>
              <div class="item-value">
                <textarea 
                  class="value-input" 
                  .value=${item.value}
                  @input=${(e) => item.tempValue = e.target.value}
                ></textarea>
                <div class="item-actions">
                  <button 
                    class="action-btn save-btn"
                    @click=${() => this.updateItem(item.key, item.tempValue || item.value)}
                  >
                    保存
                  </button>
                  <button 
                    class="action-btn delete-btn"
                    @click=${() => this.deleteItem(item.key)}
                  >
                    删除
                  </button>
                </div>
              </div>
            </div>
          `)}
        `}
        
        ${this.storageItems.length > 0 ? html`
          <div class="stats">
            <span>总计: ${this.storageItems.length} 项</span>
            <span>存储类型: ${this.currentStorageType}</span>
          </div>
          <button class="clear-all-btn" @click=${this.clearAll}>
            清空所有数据
          </button>
        ` : ''}
      </div>
    </div>
    `;
  }
}

customElements.define('storage-editor', StorageEditor);

export const render = () => {
  const root = document.getElementById('root');
  if (root) {
    root.innerHTML = '<storage-editor></storage-editor>';
  }
};