import * as plugins from '../plugins.js';
import { apiService, type ICollectionStats } from '../services/index.js';

const { html, css, cssManager, customElement, property, state, DeesElement } = plugins;

type TViewTab = 'documents' | 'indexes' | 'aggregation';

@customElement('tsview-mongo-browser')
export class TsviewMongoBrowser extends DeesElement {
  @property({ type: String })
  public accessor databaseName: string = '';

  @property({ type: String })
  public accessor collectionName: string = '';

  @state()
  private accessor activeTab: TViewTab = 'documents';

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

  @state()
  private accessor stats: ICollectionStats | null = null;

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        display: block;
        height: 100%;
      }

      .browser-container {
        display: flex;
        flex-direction: column;
        height: 100%;
      }

      .header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 8px;
        margin-bottom: 16px;
      }

      .collection-info {
        display: flex;
        align-items: center;
        gap: 16px;
      }

      .collection-title {
        font-size: 16px;
        font-weight: 500;
      }

      .collection-stats {
        display: flex;
        gap: 16px;
        font-size: 13px;
        color: #888;
      }

      .stat-item {
        display: flex;
        align-items: center;
        gap: 4px;
      }

      .tabs {
        display: flex;
        gap: 4px;
      }

      .tab {
        padding: 8px 16px;
        background: transparent;
        border: none;
        color: #888;
        cursor: pointer;
        font-size: 14px;
        border-radius: 6px;
        transition: all 0.15s;
      }

      .tab:hover {
        background: rgba(255, 255, 255, 0.05);
        color: #aaa;
      }

      .tab.active {
        background: rgba(99, 102, 241, 0.2);
        color: #818cf8;
      }

      .content {
        flex: 1;
        display: grid;
        grid-template-columns: 1fr 400px;
        gap: 16px;
        overflow: hidden;
      }

      .main-panel {
        overflow: auto;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 8px;
      }

      .detail-panel {
        background: rgba(0, 0, 0, 0.2);
        border-radius: 8px;
        overflow: hidden;
      }

      @media (max-width: 1200px) {
        .content {
          grid-template-columns: 1fr;
        }

        .detail-panel {
          display: none;
        }
      }
    `,
  ];

  async connectedCallback() {
    super.connectedCallback();
    await this.loadStats();
  }

  updated(changedProperties: Map<string, unknown>) {
    if (changedProperties.has('databaseName') || changedProperties.has('collectionName')) {
      this.loadStats();
      this.selectedDocumentId = '';
    }
  }

  private async loadStats() {
    if (!this.databaseName || !this.collectionName) return;

    try {
      this.stats = await apiService.getCollectionStats(this.databaseName, this.collectionName);
    } catch (err) {
      console.error('Error loading stats:', err);
      this.stats = null;
    }
  }

  private setActiveTab(tab: TViewTab) {
    this.activeTab = tab;
  }

  private handleDocumentSelected(e: CustomEvent) {
    this.selectedDocumentId = e.detail.documentId;
  }

  private formatCount(num: number): string {
    if (num >= 1000000) return `${(num / 1000000).toFixed(1)}M`;
    if (num >= 1000) return `${(num / 1000).toFixed(1)}K`;
    return num.toString();
  }

  private formatSize(bytes: number): string {
    const units = ['B', 'KB', 'MB', 'GB'];
    let size = bytes;
    let unitIndex = 0;
    while (size >= 1024 && unitIndex < units.length - 1) {
      size /= 1024;
      unitIndex++;
    }
    return `${size.toFixed(unitIndex > 0 ? 1 : 0)} ${units[unitIndex]}`;
  }

  render() {
    return html`
      <div class="browser-container">
        <div class="header">
          <div class="collection-info">
            <span class="collection-title">${this.collectionName}</span>
            ${this.stats
              ? html`
                  <div class="collection-stats">
                    <span class="stat-item">${this.formatCount(this.stats.count)} docs</span>
                    <span class="stat-item">${this.formatSize(this.stats.size)}</span>
                    <span class="stat-item">${this.stats.indexCount} indexes</span>
                  </div>
                `
              : ''}
          </div>

          <div class="tabs">
            <button
              class="tab ${this.activeTab === 'documents' ? 'active' : ''}"
              @click=${() => this.setActiveTab('documents')}
            >
              Documents
            </button>
            <button
              class="tab ${this.activeTab === 'indexes' ? 'active' : ''}"
              @click=${() => this.setActiveTab('indexes')}
            >
              Indexes
            </button>
            <button
              class="tab ${this.activeTab === 'aggregation' ? 'active' : ''}"
              @click=${() => this.setActiveTab('aggregation')}
            >
              Aggregation
            </button>
          </div>
        </div>

        <div class="content">
          <div class="main-panel">
            ${this.activeTab === 'documents'
              ? html`
                  <tsview-mongo-documents
                    .databaseName=${this.databaseName}
                    .collectionName=${this.collectionName}
                    @document-selected=${this.handleDocumentSelected}
                  ></tsview-mongo-documents>
                `
              : this.activeTab === 'indexes'
                ? html`
                    <tsview-mongo-indexes
                      .databaseName=${this.databaseName}
                      .collectionName=${this.collectionName}
                    ></tsview-mongo-indexes>
                  `
                : html`
                    <div style="padding: 24px; text-align: center; color: #666;">
                      Aggregation pipeline builder coming soon
                    </div>
                  `}
          </div>

          <div class="detail-panel">
            <tsview-mongo-document
              .databaseName=${this.databaseName}
              .collectionName=${this.collectionName}
              .documentId=${this.selectedDocumentId}
            ></tsview-mongo-document>
          </div>
        </div>
      </div>
    `;
  }
}