import {
  Component,
  ElementRef,
  afterNextRender,
  computed,
  inject,
  input,
  viewChild,
} from '@angular/core';
import { NgIcon } from '@ng-icons/core';
import { I18nService } from '@core/i18n.service';
import { DialogsService, type OverwriteChoice, type OverwriteRequest } from '@core/dialogs.service';
import { FocusService } from '@core/focus.service';

@Component({
  selector: 'app-overwrite-dialog',
  imports: [NgIcon],
  template: `
    <div
      class="fixed inset-0 z-40 grid place-items-center bg-black/40"
      (keydown.escape)="pick('cancel')"
    >
      <div
        class="w-[26rem] rounded-lg border border-border bg-card p-4 text-card-foreground shadow-xl"
      >
        <div class="flex items-start justify-between gap-2">
          <h2 class="min-w-0 text-sm font-semibold">
            {{ isDir() ? i18n.t('dialogs.mergeFolder') : i18n.t('dialogs.replace') }}
            <span class="font-mono">"{{ request().srcEntry.name }}"</span>?
          </h2>
          @if (request().total > 1) {
            <span
              class="shrink-0 rounded-full bg-muted px-2 py-0.5 text-[0.625rem] font-medium text-muted-foreground"
            >
              {{ i18n.t('dialogs.ofTotal', { index: request().index, total: request().total }) }}
            </span>
          }
        </div>
        <p class="mt-1 text-xs text-muted-foreground">
          @if (isDir()) {
            {{ i18n.t('dialogs.overwriteDirBody') }}
          } @else {
            {{ i18n.t('dialogs.overwriteFileBody') }}
          }
        </p>

        <!-- comparison -->
        <div class="mt-3 grid grid-cols-2 gap-2">
          @for (side of comparison(); track side.label) {
            <div class="rounded-md border border-border p-2.5">
              <div class="flex items-center justify-between">
                <span class="text-[0.625rem] font-medium tracking-wide text-muted-foreground uppercase">
                  {{ i18n.t('dialogs.' + side.label) }}
                </span>
                @if (side.newer) {
                  <span class="rounded-full bg-success/15 px-1.5 text-[0.625rem] font-medium text-success">
                    {{ i18n.t('dialogs.newer') }}
                  </span>
                }
              </div>
              <div class="mt-1.5 flex items-center gap-1.5 text-xs">
                <ng-icon
                  [name]="isDir() ? 'mynaFolder' : 'mynaFile'"
                  size="0.9rem"
                  class="shrink-0 text-muted-foreground"
                />
                <span class="font-mono tabular-nums">
                  {{ isDir() ? '—' : i18n.size(side.entry.size) }}
                </span>
              </div>
              <div class="mt-1 font-mono text-[0.6875rem] tabular-nums text-muted-foreground">
                {{ i18n.date(side.entry.mtime) }}
              </div>
            </div>
          }
        </div>

        <!-- actions -->
        <div class="mt-4 flex items-center gap-2">
          <button
            (click)="pick('cancel')"
            class="rounded-md px-3 py-1.5 text-xs font-medium text-muted-foreground hover:bg-accent hover:text-foreground"
          >
            {{ i18n.t('common.cancel') }}
          </button>
          <div class="flex-1"></div>
          @if (request().total > 1) {
            <button
              (click)="pick('skipAll')"
              class="rounded-md px-2.5 py-1.5 text-xs text-muted-foreground hover:bg-accent hover:text-foreground"
            >
              {{ i18n.t('dialogs.skipAll') }}
            </button>
            <button
              (click)="pick('overwriteAll')"
              class="rounded-md px-2.5 py-1.5 text-xs text-muted-foreground hover:bg-accent hover:text-foreground"
            >
              {{ isDir() ? i18n.t('dialogs.mergeAll') : i18n.t('dialogs.replaceAll') }}
            </button>
            <div class="h-4 w-px bg-border"></div>
          }
          <button
            (click)="pick('skip')"
            class="rounded-md px-3 py-1.5 text-xs font-medium hover:bg-accent"
          >
            {{ i18n.t('dialogs.skip') }}
          </button>
          <button
            #primaryBtn
            (click)="pick('overwrite')"
            class="rounded-md bg-primary px-3 py-1.5 text-xs font-medium text-primary-foreground hover:bg-primary/90"
          >
            {{ isDir() ? i18n.t('dialogs.merge') : i18n.t('dialogs.replace') }}
          </button>
        </div>
      </div>
    </div>
  `,
})
export class OverwriteDialog {
  readonly i18n = inject(I18nService);
  readonly request = input.required<OverwriteRequest>();


  private readonly dialogs = inject(DialogsService);
  private readonly focus = inject(FocusService);
  private readonly primaryBtn = viewChild.required<ElementRef<HTMLButtonElement>>('primaryBtn');

  constructor() {
    afterNextRender(() => this.primaryBtn().nativeElement.focus());
  }

  readonly isDir = computed(() => this.request().srcEntry.type === 'dir');

  readonly comparison = computed(() => {
    const { srcEntry, dstEntry } = this.request();
    return [
      { label: 'source', entry: srcEntry, newer: srcEntry.mtime > dstEntry.mtime },
      { label: 'destination', entry: dstEntry, newer: dstEntry.mtime > srcEntry.mtime },
    ];
  });

  pick(choice: OverwriteChoice): void {
    const req = this.request();
    this.dialogs.overwrite.set(null);
    this.focus.bump();
    req.resolve(choice);
  }
}