import { MAvatarComponent } from '../../components/m-avatar/m-avatar';
import { ChangeDetectionStrategy, Component, computed, inject, OnInit } from '@angular/core';
import { Router } from '@angular/router';
import { UiMCell, UiMSearch, UiMTabs } from '../../../ui';

import { StatePanelComponent } from '../../../components/feedback/state-panel/state-panel';
import { StatusBadgeComponent } from '../../../components/domain/status-badge/status-badge';
import { Agent } from '../../../core/api/models';
import { ContactsService } from '../../../core/contacts.service';
import { LiveService } from '../../../core/live.service';
import { DeviceService } from '../../../core/device.service';
import { isMatrixReady } from '../../../core/format';

/**
 * 移动·通讯录（SPEC FR-03）
 * 三 Tab + 搜索 + 同事展开；行操作触达 ≥44px。
 */
@Component({
  selector: 'app-mb-contacts-page',
  changeDetection: ChangeDetectionStrategy.OnPush,
  imports: [StatePanelComponent, StatusBadgeComponent, UiMSearch, MAvatarComponent, UiMCell, UiMTabs],
  template: `
    <div class="m-page">
      <header class="m-head">
        <h1>通讯录</h1>
      </header>

      <ui-m-search placeholder="搜索名称或专长" [value]="contacts.keyword()" (valueChange)="contacts.keyword.set($event)" />

      <ui-m-tabs [items]="tabItems" [active]="tabIndex()" (activeChange)="onTabIndex($event)" />

      @switch (contacts.state()) {
        @case ('loading') {
          <app-state-panel state="loading" loadingText="正在加载…" />
        }
        @case ('error') {
          <app-state-panel state="error" [message]="contacts.error()" (retry)="reload()" />
        }
        @case ('empty') {
          <app-state-panel state="empty" title="暂无数字生命" [retryable]="false" />
        }
        @default {
          @if (contacts.isEmpty()) {
            <app-state-panel state="empty" title="没有匹配的结果" [retryable]="false" />
          } @else {
            @if (contacts.tab() !== 'people') {
              <h2 class="section-title">AI 数字生命</h2>
              <div class="rows">
                @for (a of contacts.visibleAgents(); track a.id) {
                  <button type="button" class="row" (click)="open(a)">
                    <app-m-avatar [name]="a.name" />
                    <span class="row-body">
                      <strong class="truncate">{{ a.name }}</strong>
                      <small class="truncate">{{ a.specialty }}</small>
                    </span>
                    <app-status-badge [agent]="a" />
                  </button>
                }
              </div>
            }

            @if (contacts.tab() !== 'ai') {
              <h2 class="section-title">同事</h2>
              <div class="rows">
                @for (p of contacts.visiblePeople(); track p.id) {
                  <ui-m-cell
                    [title]="p.name"
                    [label]="(p.agents?.length || 0) + ' 位数字生命'"
                    icon="fa-solid fa-user"
                    [isLink]="true"
                    (click)="contacts.toggleColleague(p.id)"
                  />
                  @if (contacts.expandedColleague() === p.id) {
                    @for (a of contacts.agentsOfPerson(p); track a.id) {
                      <button type="button" class="row child" (click)="open(a)">
                        <app-m-avatar [name]="a.name" size="sm" />
                        <span class="row-body">
                          <strong class="truncate">{{ a.name }}</strong>
                          <small class="truncate">{{ a.specialty }}</small>
                        </span>
                        <app-status-badge [agent]="a" />
                      </button>
                    }
                  }
                }
              </div>
            }
          }
        }
      }
    </div>
  `,
  styles: [
    `
      .m-page {
        padding: var(--sp-5) var(--mob-gutter) var(--sp-6);
      }
      .m-head h1 {
        margin: 0 0 var(--sp-4);
        font-size: var(--fs-26);
        color: var(--ink);
      }
      .m-search {
        display: flex;
        align-items: center;
        gap: var(--sp-2);
        min-height: 46px;
        padding: 0 var(--sp-3);
        margin-bottom: var(--sp-3);
        border: 1px solid var(--edge);
        border-radius: var(--r-md);
        background: var(--surface);
        color: var(--muted);
      }
      .m-search input {
        flex: 1;
        min-width: 0;
        border: 0;
        background: transparent;
        color: var(--ink);
        font-size: var(--fs-17);
      }
      .m-tabs {
        display: flex;
        gap: var(--sp-1);
        padding: var(--sp-1);
        margin-bottom: var(--sp-4);
        border-radius: var(--r-md);
        background: var(--surface-2);
      }
      .m-tab {
        flex: 1;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: var(--sp-1);
        min-height: var(--touch-min);
        border: 0;
        border-radius: var(--r-sm);
        background: transparent;
        color: var(--ink-2);
        font-size: var(--fs-13);
        cursor: pointer;
      }
      .m-tab.active {
        background: var(--surface);
        color: var(--ink);
        font-weight: 600;
        box-shadow: var(--shadow-soft);
      }
      .tab-count {
        font-size: var(--fs-11);
        opacity: 0.7;
      }
      .section-title {
        margin: 0 0 var(--sp-3);
        font-size: var(--fs-13);
        color: var(--ink-2);
      }
      .section-title:not(:first-of-type) {
        margin-top: var(--sp-5);
      }
      .rows {
        display: grid;
        gap: var(--sp-2);
      }
      .row {
        display: flex;
        align-items: center;
        gap: var(--sp-3);
        width: 100%;
        min-height: 64px;
        padding: var(--sp-2) var(--sp-3);
        border: 1px solid var(--edge);
        border-radius: var(--r-md);
        background: var(--surface);
        text-align: left;
        cursor: pointer;
      }
      .row:active {
        background: var(--surface-hover);
      }
      .row.child {
        margin-left: var(--sp-4);
        width: calc(100% - var(--sp-4));
        background: var(--surface-2);
      }
      .row-body {
        display: grid;
        gap: 2px;
        flex: 1;
        min-width: 0;
      }
      .row-body strong {
        font-size: var(--fs-15);
        color: var(--ink);
      }
      .row-body small {
        font-size: var(--fs-12);
        color: var(--muted);
      }
      .truncate {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }
    `,
  ],
})
export class MbContactsPage implements OnInit {
  readonly contacts = inject(ContactsService);
  private readonly live = inject(LiveService);
  private readonly router = inject(Router);
  private readonly device = inject(DeviceService);

  readonly tabs = [
    { key: 'all' as const, label: '全部' },
    { key: 'ai' as const, label: 'AI' },
    { key: 'people' as const, label: '同事' },
  ];

  readonly tabItems = [{ label: '全部' }, { label: 'AI 数字生命' }, { label: '同事' }];
  readonly tabIndex = computed(() => ({ all: 0, ai: 1, people: 2 })[this.contacts.tab()]);

  onTabIndex(i: number): void {
    this.contacts.setTab((['all', 'ai', 'people'] as const)[i] ?? 'all');
  }

  readonly counts = computed(() => {
    const c = this.contacts.counts();
    return { all: c.all, ai: c.ai, people: c.people };
  });

  async ngOnInit(): Promise<void> {
    await this.contacts.ensureLoaded();
  }

  async reload(): Promise<void> {
    await this.live.refresh();
  }

  onSearch(e: Event): void {
    this.contacts.keyword.set((e.target as HTMLInputElement).value);
  }

  open(a: Agent): void {
    void this.router.navigate(
      isMatrixReady(a)
        ? ['/', this.device.mode(), 'chat', a.id]
        : ['/', this.device.mode(), 'agent', a.id],
    );
  }
}