import { Component, Input, Output, EventEmitter, signal } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Block, ButtonProps } from '../../../core/models/block.model';
import { ButtonConfigModalComponent } from './button-config-modal.component';

@Component({
  selector: 'app-button-block',
  standalone: true,
  imports: [CommonModule, ButtonConfigModalComponent],
  template: `
    <div class="relative group inline-block">
      <!-- Rendered Button -->
      <a
        [href]="props.url"
        [target]="props.openInNewTab ? '_blank' : '_self'"
        class="inline-flex items-center justify-center font-medium transition-all select-none no-underline cursor-pointer"
        [ngClass]="getButtonClasses()"
        [style.background-color]="getBgColor()"
        [style.color]="getTextColor()"
        (click)="onClick($event)"
      >
        {{ props.label || 'Button' }}
      </a>

      <!-- Edit Trigger (visible on hover/focus if not configuring) -->
      <button
        *ngIf="!showConfig()"
        class="absolute -top-2 -right-2 bg-surface2 border border-app rounded-full p-1 opacity-0 group-hover:opacity-100 transition-opacity shadow-sm z-10"
        title="Configure button"
        (click)="openConfig($event)"
      >
        <svg class="w-3 h-3 text-neutral-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15.232 5.232l3.536 3.536m-2.036-5.036a2.5 2.5 0 113.536 3.536L6.5 21.036H3v-3.572L16.732 3.732z" />
        </svg>
      </button>

      <!-- Config Modal -->
      @if (showConfig()) {
        <app-button-config-modal
          [props]="props"
          [blockId]="block.id"
          (saveProps)="onSaveConfig($event)"
          (cancel)="closeConfig()"
        />
      }
    </div>
  `
})
export class ButtonBlockComponent {
  @Input({ required: true }) block!: Block<ButtonProps>;
  @Output() update = new EventEmitter<ButtonProps>();

  showConfig = signal(false);

  ngOnInit() {
    // If new button (empty label), open config immediately
    if (!this.props.label) {
      this.showConfig.set(true);
    }
  }

  get props(): ButtonProps {
    return this.block.props;
  }

  getButtonClasses(): string {
    const classes: string[] = [];
    
    // Size
    switch (this.props.size) {
      case 'small': classes.push('px-3 py-1.5 text-xs'); break;
      case 'large': classes.push('px-6 py-3 text-base'); break;
      default: classes.push('px-4 py-2 text-sm'); break; // medium
    }

    // Shape
    if (this.props.shape === 'pill') {
      classes.push('rounded-full');
    } else if (this.props.shape === 'rounded') {
      classes.push('rounded-lg');
    } else {
      classes.push('rounded-md'); // default/square
    }

    // Variant / Style
    if (this.props.variant === '3d') {
      classes.push('border-b-4 border-black/20 active:border-b-0 active:translate-y-1');
    } else if (this.props.variant === 'shadow') {
      classes.push('shadow-lg hover:shadow-xl hover:-translate-y-0.5');
    } else if (this.props.variant === 'outline') {
      classes.push('border-2');
    }

    return classes.join(' ');
  }

  getBgColor(): string {
    if (this.props.variant === 'outline') return 'transparent';
    return this.props.backgroundColor || '#3b82f6';
  }

  getTextColor(): string {
    if (this.props.variant === 'outline') {
      return this.props.backgroundColor || '#3b82f6';
    }
    // Simple contrast check could be added here, assuming white for now for colored buttons
    return '#ffffff';
  }

  onClick(event: MouseEvent) {
    // Prevent navigation in editor
    event.preventDefault();
  }

  openConfig(event: MouseEvent) {
    event.stopPropagation();
    this.showConfig.set(true);
  }

  closeConfig() {
    this.showConfig.set(false);
  }

  onSaveConfig(newProps: ButtonProps) {
    this.update.emit(newProps);
    this.showConfig.set(false);
  }
}