import { CommonModule } from '@angular/common';
import { ChangeDetectionStrategy, Component, computed, signal } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { Check, Clipboard, LayoutTemplate, LucideAngularModule } from 'lucide-angular';

interface GridDevice {
  name: string;
  value: string;
  checked: boolean;
  columns: string;
}

@Component({
  selector: 'app-admin-boot-layout',
  standalone: true,
  imports: [CommonModule, FormsModule, LucideAngularModule],
  templateUrl: './admin-boot-layout.component.html',
  styleUrl: './admin-boot-layout.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class AdminBootLayoutComponent {
  readonly icons = { Check, Clipboard, LayoutTemplate };
  readonly columnCounts = [2, 3, 4, 5, 6, 7, 8];
  readonly presets = ['4*4*4', '0*0*0*0', '3*3*6', '6*6', '2*10', '10*2'];
  readonly frames = [
    { name: '.container 标准居中', value: 'container' },
    { name: '.container-fluid 全屏 100%', value: 'container-fluid' },
  ];
  readonly frame = signal('container');
  readonly columnCount = signal(2);
  readonly devices = signal<GridDevice[]>([
    { name: '自适应', value: 'col', checked: true, columns: '4*4*4' },
    { name: '平板 PAD', value: 'col-sm', checked: false, columns: '4*4*4' },
    { name: '窄屏设备', value: 'col-md', checked: false, columns: '4*4*4' },
    { name: '传统电脑', value: 'col-lg', checked: false, columns: '4*4*4' },
    { name: '高清屏幕', value: 'col-xl', checked: false, columns: '4*4*4' },
  ]);
  readonly copied = signal(false);

  readonly columnClasses = computed(() => {
    const classes = Array.from({ length: this.columnCount() }, () => [] as string[]);
    for (const device of this.devices().filter((item) => item.checked)) {
      const values = device.columns.split('*');
      for (let index = 0; index < values.length && index < classes.length; index += 1) {
        const value = Number.parseInt(values[index] || '0', 10);
        classes[index].push(value === 0 ? device.value : `${device.value}-${value}`);
      }
    }
    return classes.map((items) => items.join(' ').trim());
  });

  readonly html = computed(() => {
    const rows = this.columnClasses().map((className) => `    <div class="${className}"></div>`).join('\n');
    return `<div class="${this.frame()}">\n  <div class="row">\n${rows}\n  </div>\n</div>`;
  });

  updateDevice(index: number, patch: Partial<GridDevice>): void {
    this.devices.update((items) => items.map((item, itemIndex) => itemIndex === index ? { ...item, ...patch } : item));
  }

  setPreset(index: number, columns: string): void {
    this.updateDevice(index, { columns });
  }

  async copyHtml(): Promise<void> {
    await navigator.clipboard.writeText(this.html());
    this.copied.set(true);
    globalThis.setTimeout(() => this.copied.set(false), 1500);
  }
}