import * as appstate from '../appstate.js';
import * as shared from './shared/index.js';
import {
  css,
  cssManager,
  customElement,
  DeesElement,
  html,
  state,
  type TemplateResult,
} from '@design.estate/dees-element';

@customElement('sg-view-packages')
export class SgViewPackages extends DeesElement {
  @state()
  accessor packagesState: appstate.IPackagesState = {
    packages: [],
    currentPackage: null,
    versions: [],
    total: 0,
    query: '',
    protocolFilter: '',
  };

  @state()
  accessor uiState: appstate.IUiState = { activeView: 'packages' };

  constructor() {
    super();
    const pkgSub = appstate.packagesStatePart
      .select((s) => s)
      .subscribe((s) => {
        this.packagesState = s;
      });
    this.rxSubscriptions.push(pkgSub);

    const uiSub = appstate.uiStatePart
      .select((s) => s)
      .subscribe((s) => {
        this.uiState = s;
      });
    this.rxSubscriptions.push(uiSub);
  }

  public static styles = [
    cssManager.defaultStyles,
    shared.viewHostCss,
  ];

  async connectedCallback() {
    super.connectedCallback();
    if (this.uiState.activeEntityId) {
      await this.loadPackageDetail(this.uiState.activeEntityId);
    } else {
      await appstate.packagesStatePart.dispatchAction(
        appstate.searchPackagesAction,
        { offset: 0 },
      );
    }
  }

  private async loadPackageDetail(packageId: string) {
    await appstate.packagesStatePart.dispatchAction(
      appstate.fetchPackageAction,
      { packageId },
    );
    await appstate.packagesStatePart.dispatchAction(
      appstate.fetchPackageVersionsAction,
      { packageId },
    );
  }

  public render(): TemplateResult {
    if (this.uiState.activeEntityId && this.packagesState.currentPackage) {
      return html`
        <sg-package-detail-view
          .package="${this.packagesState.currentPackage}"
          .versions="${this.packagesState.versions}"
          @back="${() => this.goBack()}"
          @delete="${(e: CustomEvent) => this.deletePackage(e.detail.packageId)}"
          @delete-version="${(e: CustomEvent) => this.deleteVersion(e.detail)}"
        ></sg-package-detail-view>
      `;
    }

    return html`
      <sg-packages-list-view
        .packages="${this.packagesState.packages}"
        .total="${this.packagesState.total}"
        .query="${this.packagesState.query}"
        .protocols="${['npm', 'oci', 'maven', 'cargo', 'pypi', 'composer', 'rubygems']}"
        @search="${(e: CustomEvent) => this.search(e.detail.query)}"
        @filter="${(e: CustomEvent) => this.filter(e.detail.protocol)}"
        @select="${(e: CustomEvent) => this.selectPackage(e.detail.packageId)}"
        @page="${(e: CustomEvent) => this.paginate(e.detail.offset)}"
      ></sg-packages-list-view>
    `;
  }

  private selectPackage(packageId: string) {
    appstate.uiStatePart.setState({
      ...appstate.uiStatePart.getState(),
      activeEntityId: packageId,
    });
    this.loadPackageDetail(packageId);
  }

  private goBack() {
    appstate.uiStatePart.setState({
      ...appstate.uiStatePart.getState(),
      activeEntityId: undefined,
    });
    appstate.packagesStatePart.setState({
      ...appstate.packagesStatePart.getState(),
      currentPackage: null,
      versions: [],
    });
  }

  private async search(query: string) {
    await appstate.packagesStatePart.dispatchAction(
      appstate.searchPackagesAction,
      { query, protocol: this.packagesState.protocolFilter, offset: 0 },
    );
  }

  private async filter(protocol: string) {
    await appstate.packagesStatePart.dispatchAction(
      appstate.searchPackagesAction,
      { query: this.packagesState.query, protocol, offset: 0 },
    );
  }

  private async paginate(offset: number) {
    await appstate.packagesStatePart.dispatchAction(
      appstate.searchPackagesAction,
      {
        query: this.packagesState.query,
        protocol: this.packagesState.protocolFilter,
        offset,
      },
    );
  }

  private async deletePackage(packageId: string) {
    await appstate.packagesStatePart.dispatchAction(
      appstate.deletePackageAction,
      { packageId },
    );
    this.goBack();
  }

  private async deleteVersion(detail: { packageId: string; version: string }) {
    // TODO: implement deletePackageVersion action
  }
}