import { Component, inject, signal } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { ParentApiService } from '../../core/parent-api.service';
import { I18nService } from '../../core/i18n.service';
import { ActivityView, MaterialView } from '../../core/models';
import { EmojiPickerComponent } from '../../shared/emoji-picker.component';
import { ColorPickerComponent } from '../../shared/color-picker.component';

/** Pestaña Materiales: catálogo de materiales y actividades (con su material). */
@Component({
  selector: 'app-materials-tab',
  imports: [FormsModule, EmojiPickerComponent, ColorPickerComponent],
  template: `
    <!-- Alta de material -->
    <div class="adm-card">
      <p class="adm-label">Nuevo material</p>
      <div class="grid2">
        <div class="field">
          <label class="field__label">Nombre (ES)</label>
          <input class="field__input" [(ngModel)]="mEs" placeholder="Ej. Flauta" />
        </div>
        <div class="field">
          <label class="field__label">Nom (CA)</label>
          <input class="field__input" [(ngModel)]="mCa" placeholder="Ex. Flauta" />
        </div>
      </div>
      <div class="field">
        <label class="field__label">Icono <span class="field__info" title="Toca un emoji para el material.">ⓘ</span></label>
        <app-emoji-picker [(value)]="mIcon" [options]="materialIcons" />
      </div>
      <div class="field">
        <label class="field__label">Color</label>
        <app-color-picker [(value)]="mColor" />
      </div>
      <button class="adm-btn" [disabled]="!mEs || !mCa || !mIcon" (click)="addMaterial()">+ {{ i18n.t('add') }}</button>

      <div class="adm-list" style="margin-top:16px">
        @for (m of materials(); track m.id) {
          <div class="adm-item">
            <span>{{ m.icon }}</span>
            <span class="adm-item__grow">{{ i18n.label(m.labelEs, m.labelCa) }}</span>
            <button class="adm-del" (click)="delMaterial(m)">✕</button>
          </div>
        } @empty {
          <p class="adm-empty">{{ i18n.t('none') }}</p>
        }
      </div>
    </div>

    <!-- Alta de actividad con su material -->
    <div class="adm-card">
      <p class="adm-label">Nueva actividad</p>
      <div class="grid2">
        <div class="field">
          <label class="field__label">Actividad (ES)</label>
          <input class="field__input" [(ngModel)]="aEs" placeholder="Ej. Gimnasia" />
        </div>
        <div class="field">
          <label class="field__label">Activitat (CA)</label>
          <input class="field__input" [(ngModel)]="aCa" placeholder="Ex. Gimnàstica" />
        </div>
      </div>
      <div class="field">
        <label class="field__label">Icono <span class="field__info" title="Toca un emoji para la actividad.">ⓘ</span></label>
        <app-emoji-picker [(value)]="aIcon" [options]="activityIcons" />
      </div>
      <div class="field">
        <label class="field__label">Color</label>
        <app-color-picker [(value)]="aColor" />
      </div>
      <div class="field">
        <label class="field__label">Material que conlleva</label>
        <div class="picker">
          @for (m of materials(); track m.id) {
            <label class="adm-chip">
              <input type="checkbox" [checked]="selectedMaterials.has(m.id)" (change)="toggleMaterial(m.id)" />
              {{ m.icon }} {{ i18n.label(m.labelEs, m.labelCa) }}
            </label>
          } @empty {
            <span class="adm-empty">Crea materiales primero ↑</span>
          }
        </div>
      </div>
      <button class="adm-btn" [disabled]="!aEs || !aCa || !aIcon" (click)="addActivity()">+ {{ i18n.t('add') }}</button>
    </div>

    <!-- Actividades existentes -->
    <div class="adm-card">
      <p class="adm-label">Actividades</p>
      <div class="adm-list">
        @for (a of activities(); track a.id) {
          <div class="adm-item">
            <span>{{ a.icon }}</span>
            <span class="adm-item__grow">
              <strong>{{ i18n.label(a.labelEs, a.labelCa) }}</strong> — {{ materialNames(a) }}
            </span>
            <button class="adm-del" (click)="delActivity(a)">✕</button>
          </div>
        } @empty {
          <p class="adm-empty">{{ i18n.t('none') }}</p>
        }
      </div>
    </div>
  `,
  styles: [
    `
      .field { margin-bottom: var(--space-4); }
      .field__label { display: flex; align-items: center; gap: 6px; font-weight: 700; color: var(--text-1); margin-bottom: 6px; }
      .field__info { cursor: help; color: var(--text-4); font-size: 0.85rem; }
      .field__input {
        font-family: var(--font-body); font-size: 1rem; padding: 12px 14px;
        border: 2px solid var(--border-2); border-radius: var(--radius-sm);
        background: var(--surface); color: var(--text-strong); width: 100%; box-sizing: border-box;
      }
      .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
      @media (max-width: 520px) { .grid2 { grid-template-columns: 1fr; } }
      .picker { display: flex; flex-wrap: wrap; gap: 8px; }
    `,
  ],
})
export class MaterialsTabComponent {
  private readonly api = inject(ParentApiService);
  protected readonly i18n = inject(I18nService);

  protected readonly materialIcons = ['✏️', '📘', '📏', '🎵', '📓', '👕', '👟', '🧖', '💧', '📖', '📒', '🍎', '🎒', '🖍️', '✂️', '📐', '🧮', '🎨'];
  protected readonly activityIcons = ['🤸', '🎵', '📘', '📖', '🎨', '⚽', '🔬', '🧮', '🌍', '🎭', '💻', '🏃'];

  protected readonly materials = signal<MaterialView[]>([]);
  protected readonly activities = signal<ActivityView[]>([]);

  protected mIcon = '';
  protected mEs = '';
  protected mCa = '';
  protected mColor = '#5B8DEF';
  protected aIcon = '';
  protected aEs = '';
  protected aCa = '';
  protected aColor = '#7FBF6B';
  protected selectedMaterials = new Set<number>();

  constructor() {
    this.reload();
  }

  private reload(): void {
    this.api.listMaterials().subscribe((l) => this.materials.set(l));
    this.api.listActivities().subscribe((l) => this.activities.set(l));
  }

  materialNames(a: ActivityView): string {
    const byId = new Map(this.materials().map((m) => [m.id, this.i18n.label(m.labelEs, m.labelCa)]));
    return a.materialIds.map((id) => byId.get(id) ?? '·').join(', ') || '—';
  }

  toggleMaterial(id: number): void {
    if (this.selectedMaterials.has(id)) {
      this.selectedMaterials.delete(id);
    } else {
      this.selectedMaterials.add(id);
    }
  }

  addMaterial(): void {
    this.api
      .createMaterial({ labelEs: this.mEs, labelCa: this.mCa, icon: this.mIcon, color: this.mColor })
      .subscribe(() => {
        this.mEs = this.mCa = this.mIcon = '';
        this.reload();
      });
  }

  delMaterial(m: MaterialView): void {
    this.api.deleteMaterial(m.id).subscribe(() => this.reload());
  }

  addActivity(): void {
    this.api
      .createActivity({
        labelEs: this.aEs,
        labelCa: this.aCa,
        icon: this.aIcon,
        color: this.aColor,
        materialIds: [...this.selectedMaterials],
      })
      .subscribe(() => {
        this.aEs = this.aCa = this.aIcon = '';
        this.selectedMaterials.clear();
        this.reload();
      });
  }

  delActivity(a: ActivityView): void {
    this.api.deleteActivity(a.id).subscribe(() => this.reload());
  }
}