import * as plugins from '../plugins.js';
import * as shared from './shared/index.js';
import * as appstate from '../appstate.js';

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

@customElement('ops-view-config')
export class OpsViewConfig extends DeesElement {
  @state()
  private configState: appstate.IConfigState = {
    config: null,
    isLoading: false,
    error: null,
  };

  @state()
  private editingSection: string | null = null;

  @state()
  private editedConfig: any = null;

  constructor() {
    super();
    const subscription = appstate.configStatePart
      .select((stateArg) => stateArg)
      .subscribe((configState) => {
        this.configState = configState;
      });
    this.rxSubscriptions.push(subscription);
  }

  public static styles = [
    cssManager.defaultStyles,
    shared.viewHostCss,
    css`
      .configSection {
        background: white;
        border: 1px solid #e9ecef;
        border-radius: 8px;
        margin-bottom: 24px;
        overflow: hidden;
      }

      .sectionHeader {
        background: #f8f9fa;
        padding: 16px 24px;
        border-bottom: 1px solid #e9ecef;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      .sectionTitle {
        font-size: 18px;
        font-weight: 600;
        color: #333;
      }

      .sectionContent {
        padding: 24px;
      }

      .configField {
        margin-bottom: 20px;
      }

      .fieldLabel {
        font-size: 14px;
        font-weight: 600;
        color: #666;
        margin-bottom: 8px;
        display: block;
      }

      .fieldValue {
        font-family: 'Consolas', 'Monaco', monospace;
        font-size: 14px;
        color: #333;
        background: #f8f9fa;
        padding: 8px 12px;
        border-radius: 4px;
        border: 1px solid #e9ecef;
      }

      .configEditor {
        width: 100%;
        min-height: 200px;
        font-family: 'Consolas', 'Monaco', monospace;
        font-size: 14px;
        padding: 12px;
        border: 1px solid #e9ecef;
        border-radius: 4px;
        background: #f8f9fa;
        resize: vertical;
      }

      .buttonGroup {
        display: flex;
        gap: 8px;
        margin-top: 16px;
      }

      .warning {
        background: #fff3cd;
        border: 1px solid #ffeaa7;
        border-radius: 4px;
        padding: 12px;
        margin-bottom: 16px;
        color: #856404;
        display: flex;
        align-items: center;
        gap: 8px;
      }

      .errorMessage {
        background: #fee;
        border: 1px solid #fcc;
        border-radius: 4px;
        padding: 16px;
        color: #c00;
        margin: 16px 0;
      }

      .loadingMessage {
        text-align: center;
        padding: 40px;
        color: #666;
      }
    `,
  ];

  public render() {
    return html`
      <ops-sectionheading>Configuration</ops-sectionheading>
      
      ${this.configState.isLoading ? html`
        <div class="loadingMessage">
          <dees-spinner></dees-spinner>
          <p>Loading configuration...</p>
        </div>
      ` : this.configState.error ? html`
        <div class="errorMessage">
          Error loading configuration: ${this.configState.error}
        </div>
      ` : this.configState.config ? html`
        <div class="warning">
          <dees-icon name="warning"></dees-icon>
          <span>Changes to configuration will take effect immediately. Please be careful when editing production settings.</span>
        </div>

        ${this.renderConfigSection('server', 'Server Configuration', this.configState.config.server)}
        ${this.renderConfigSection('email', 'Email Configuration', this.configState.config.email)}
        ${this.renderConfigSection('dns', 'DNS Configuration', this.configState.config.dns)}
        ${this.renderConfigSection('security', 'Security Configuration', this.configState.config.security)}
        ${this.renderConfigSection('storage', 'Storage Configuration', this.configState.config.storage)}
      ` : html`
        <div class="errorMessage">No configuration loaded</div>
      `}
    `;
  }

  private renderConfigSection(key: string, title: string, config: any) {
    const isEditing = this.editingSection === key;
    
    return html`
      <div class="configSection">
        <div class="sectionHeader">
          <h3 class="sectionTitle">${title}</h3>
          <div>
            ${isEditing ? html`
              <dees-button 
                @click=${() => this.saveConfig(key)}
                type="highlighted"
              >
                Save
              </dees-button>
              <dees-button 
                @click=${() => this.cancelEdit()}
              >
                Cancel
              </dees-button>
            ` : html`
              <dees-button 
                @click=${() => this.startEdit(key, config)}
              >
                Edit
              </dees-button>
            `}
          </div>
        </div>
        <div class="sectionContent">
          ${isEditing ? html`
            <textarea 
              class="configEditor"
              @input=${(e) => this.editedConfig = e.target.value}
              .value=${JSON.stringify(config, null, 2)}
            ></textarea>
          ` : html`
            ${this.renderConfigFields(config)}
          `}
        </div>
      </div>
    `;
  }

  private renderConfigFields(config: any, prefix = '') {
    if (!config || typeof config !== 'object') {
      return html`<div class="fieldValue">${config}</div>`;
    }

    return Object.entries(config).map(([key, value]) => {
      const fieldName = prefix ? `${prefix}.${key}` : key;
      
      if (typeof value === 'object' && !Array.isArray(value)) {
        return html`
          <div class="configField">
            <label class="fieldLabel">${fieldName}</label>
            ${this.renderConfigFields(value, fieldName)}
          </div>
        `;
      }
      
      return html`
        <div class="configField">
          <label class="fieldLabel">${fieldName}</label>
          <div class="fieldValue">
            ${Array.isArray(value) ? value.join(', ') : value}
          </div>
        </div>
      `;
    });
  }

  private startEdit(section: string, config: any) {
    this.editingSection = section;
    this.editedConfig = JSON.stringify(config, null, 2);
  }

  private cancelEdit() {
    this.editingSection = null;
    this.editedConfig = null;
  }

  private async saveConfig(section: string) {
    try {
      const parsedConfig = JSON.parse(this.editedConfig);
      
      await appstate.configStatePart.dispatchAction(appstate.updateConfigurationAction, {
        section,
        config: parsedConfig,
      });
      
      this.editingSection = null;
      this.editedConfig = null;
      
      // Configuration updated successfully
    } catch (error) {
      console.error(`Error updating configuration:`, error);
    }
  }
}