import { CommonModule } from '@angular/common';
import { ChangeDetectionStrategy, Component, Input } from '@angular/core';
import { NgComponentOutlet } from '@angular/common';
import { PageRenderModel } from '../../dynamic-renderer/page-renderer/page-renderer.model';
import { WidgetRenderNode } from '../../dynamic-renderer/widget-host/widget-host.model';
import { WidgetHostService } from '../../dynamic-renderer/widget-host/widget-host.service';
import { RuntimeDiagnosticsService } from '../../core/runtime/runtime-diagnostics.service';
import { UnknownWidgetComponent } from '../../widgets/ui';
import { ConfigService } from '../../core/config/config.service';

@Component({
  selector: 'app-dynamic-page-layout',
  standalone: true,
  imports: [CommonModule, NgComponentOutlet],
  template: `
    @if (model) {
      <main class="dynamic-page-layout" [attr.data-layout]="model.layout">
        @for (section of model.sections; track section.id) {
          <section class="dynamic-section" [attr.data-section-type]="section.type">
            @for (widget of section.widgets; track widget.id) {
              <div class="dynamic-widget" [attr.data-widget-type]="widget.type">
                @if (resolveWidget(widget, section.id); as resolved) {
                  <ng-container *ngComponentOutlet="resolved.component; inputs: resolved.props"></ng-container>
                }
              </div>
            }
          </section>
        }
      </main>
    }
  `,
  styles: [
    `
      .dynamic-page-layout { display: grid; gap: 1rem; }
      .dynamic-section { display: grid; gap: 1rem; }
    `
  ],
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class DynamicPageLayoutComponent {
  @Input() model: PageRenderModel | null = null;
  private readonly loggedUnknownWidgets = new Set<string>();

  constructor(
    private readonly widgetHost: WidgetHostService,
    private readonly diagnostics: RuntimeDiagnosticsService,
    private readonly configService: ConfigService
  ) {}

  resolveWidget(widget: WidgetRenderNode, sectionId?: string) {
    const resolved = this.widgetHost.resolveWidget(widget.source);
    if (resolved) {
      return resolved;
    }

    const diagnosticKey = `${this.model?.id ?? 'unknown'}:${sectionId ?? 'unknown'}:${widget.id}`;
    if (!this.loggedUnknownWidgets.has(diagnosticKey)) {
      this.loggedUnknownWidgets.add(diagnosticKey);

      const tenantId = this.configService.getBootstrapSnapshot()?.tenant.id ?? 'unknown';
      this.diagnostics.logUnknownWidget({
        tenant: tenantId,
        page: this.model?.key ?? 'unknown',
        section: sectionId ?? 'unknown',
        widget: `${widget.type}@${widget.version}`,
        reason: 'not_registered_in_widget_registry'
      });
    }

    return {
      type: widget.type,
      version: widget.version,
      component: UnknownWidgetComponent,
      props: {
        widgetType: widget.type,
        widgetVersion: widget.version
      }
    };
  }
}