import {
  Component,
  OnInit,
  OnDestroy,
  ViewChild,
  ElementRef,
  AfterViewInit,
} from '@angular/core';
import {
  Router,
  RouterOutlet,
  RouterModule,
  NavigationEnd,
} from '@angular/router';
import { CommonModule } from '@angular/common';
import { filter, Subscription } from 'rxjs';

// 导入所有需要的 NG-ZORRO 模块
import { NzLayoutModule } from 'ng-zorro-antd/layout';
import { NzMenuModule } from 'ng-zorro-antd/menu';
import { NzIconModule } from 'ng-zorro-antd/icon';
import { NzButtonModule } from 'ng-zorro-antd/button';
import { NzTabsModule } from 'ng-zorro-antd/tabs';
import { AuthService } from '../services/auth.service';

interface TabItem {
  title: string;
  path: string;
}

@Component({
  selector: 'app-main-layout',
  template: `
    <nz-layout class="app-layout">
      <nz-sider
        class="menu-sidebar"
        nzCollapsible
        nzTheme="dark"
        [nzCollapsedWidth]="64"
        nzWidth="216px"
        [(nzCollapsed)]="isCollapsed"
        [nzTrigger]="null"
      >
        <div class="menu-sidebar-inner">
          <div class="sidebar-logo">
            <a href="https://ng.ant.design/" target="_blank">
              <img src="https://ng.ant.design/assets/img/logo.svg" alt="logo" />
              <h1>OMS</h1>
            </a>
          </div>
          <ul nz-menu nzTheme="dark" nzMode="inline" class="menu">
            <!-- 路由到控制台页面 -->
            <li
              nz-menu-item
              [routerLink]="['/dashboard']"
              [routerLinkActive]="['ant-menu-item-selected']"
              [nzSelected]="activePath === '/dashboard'"
            >
              <span nz-icon nzType="dashboard"></span>
              <span>Dashboard</span>
            </li>
            <li
              nz-menu-item
              [routerLink]="['/user']"
              [routerLinkActive]="['ant-menu-item-selected']"
              [nzSelected]="activePath === '/user'"
            >
              <span nz-icon nzType="team"></span>
              <span>用户管理</span>
            </li>
            <li nz-submenu nzTitle="消息系统" nzIcon="message">
              <ul>
                <li
                  nz-menu-item
                  [routerLink]="['/message-activity']"
                  [routerLinkActive]="['ant-menu-item-selected']"
                  [nzSelected]="activePath === '/message-activity'"
                >
                  <span nz-icon nzType="notification"></span>
                  <span>消息通知</span>
                </li>
                <li
                  nz-menu-item
                  [routerLink]="['/message-record']"
                  [routerLinkActive]="['ant-menu-item-selected']"
                  [nzSelected]="activePath === '/message-record'"
                >
                  <span nz-icon nzType="send"></span>
                  <span>推送记录</span>
                </li>
                <li
                  nz-menu-item
                  [routerLink]="['/message-template']"
                  [routerLinkActive]="['ant-menu-item-selected']"
                  [nzSelected]="activePath === '/message-template'"
                >
                  <span nz-icon nzType="cluster"></span>
                  <span>消息模板</span>
                </li>
                <li
                  nz-menu-item
                  [routerLink]="['/message-strategy']"
                  [routerLinkActive]="['ant-menu-item-selected']"
                  [nzSelected]="activePath === '/message-strategy'"
                >
                  <span nz-icon nzType="ant-design"></span>
                  <span>推送策略</span>
                </li>
                <li
                  nz-menu-item
                  [routerLink]="['/message-statistics']"
                  [routerLinkActive]="['ant-menu-item-selected']"
                  [nzSelected]="activePath === '/message-statistics'"
                >
                  <span nz-icon nzType="line-chart"></span>
                  <span>统计分析</span>
                </li>
              </ul>
            </li>
          </ul>
        </div>
      </nz-sider>

      <!-- 主内容区域 -->
      <nz-layout>
        <!-- 顶部导航栏：核心修复区域 -->
        <nz-header class="header">
          <!-- 顶部容器：使用flex确保子元素同行 -->
          <div class="header-container">
            <!-- 1. 折叠按钮：固定宽度，不压缩 -->
            <div class="header-trigger-wrapper">
              <span class="header-trigger" (click)="isCollapsed = !isCollapsed">
                <i
                  class="trigger"
                  nz-icon
                  [nzType]="isCollapsed ? 'menu-unfold' : 'menu-fold'"
                ></i>
              </span>
            </div>

            <!-- 2. Tab标签页：占满中间剩余空间，溢出时可滚动 -->
            <div class="tab-container">
              <div class="tabs-wrapper" #tabsWrapper>
                <nz-tabs
                  [nzSelectedIndex]="getTabIndex(activePath)"
                  nzType="card"
                  nzHideAll
                  nzSize="small"
                  (nzSelectedIndexChange)="selectTab(openTabs[$event]?.path)"
                >
                  <nz-tab
                    *ngFor="let tab of openTabs; let i = index"
                    [nzTitle]="titleTemplate"
                  >
                    <ng-template #titleTemplate>
                      <span class="tab-title" (click)="selectTab(tab.path)">{{
                        tab.title
                      }}</span>
                      <i
                        nz-icon
                        nzType="close"
                        class="close-icon"
                        (click)="
                          closeTab(tab.path, i); $event.stopPropagation()
                        "
                      ></i>
                    </ng-template>
                  </nz-tab>
                </nz-tabs>
              </div>
              <button
                nz-button
                nzType="text"
                nzSize="small"
                class="scroll-btn"
                (click)="scrollTabs('right')"
              >
                <span nz-icon nzType="right"></span>
              </button>
            </div>

            <!-- 3. Admin菜单：固定在右侧，不压缩 -->
            <div class="user-menu-wrapper">
              <ul nz-menu nzTheme="light" nzMode="horizontal" class="user-menu">
                <li nz-submenu nzTitle="Admin" nzIcon="user">
                  <ul>
                    <li nz-menu-item>个人设置</li>
                    <li nz-menu-item (click)="logout()">退出登录</li>
                  </ul>
                </li>
              </ul>
            </div>
          </div>
        </nz-header>

        <!-- 内容区域（保持不变） -->
        <nz-content>
          <div class="inner-content" #content>
            <router-outlet></router-outlet>
          </div>
        </nz-content>
      </nz-layout>
    </nz-layout>
  `,
  styles: [
    `
      :host {
        display: flex;
        text-rendering: optimizeLegibility;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
      }

      .app-layout {
        min-height: 100vh;
        display: flex;
      }

      /* 侧边栏样式（保持不变） */
      .menu-sidebar {
        position: relative;
        z-index: 1001;
        min-height: 100vh;
        box-shadow: 2px 0 6px rgba(0, 21, 41, 0.35);
        background: #001529;
      }

      .menu-sidebar-inner {
        position: sticky;
        height: 100vh;
        top: 0;
        left: 0;
        display: flex;
        flex-direction: column;
        background: #001529;
      }

      .menu {
        flex: 1;
        overflow-y: auto;
        padding-bottom: 20px;
      }

      /* 侧边栏Logo */
      .sidebar-logo {
        height: 64px;
        padding-left: 14px;
        overflow: hidden;
        line-height: 64px;
      }

      .sidebar-logo img {
        display: inline-block;
        height: 32px;
        width: 32px;
        vertical-align: middle;
      }

      .sidebar-logo h1 {
        display: inline-block;
        margin: 0 0 0 20px;
        color: #fff;
        font-weight: 600;
        font-size: 14px;
        vertical-align: middle;
      }

      /* 顶部导航栏核心修复样式 */
      .header {
        padding: 0;
        width: 100%;
        z-index: 1000;
        /* 固定顶部高度，避免元素挤压换行 */
        height: 64px;
      }

      /* 顶部容器：flex布局确保子元素同行 */
      .header-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        padding: 0 8px;
        background: #fff;
        box-shadow: 0 1px 4px rgba(0, 21, 41, 0.08);
      }

      /* 1. 折叠按钮容器：固定宽度，不压缩 */
      .header-trigger-wrapper {
        width: 64px; /* 与折叠按钮点击区域匹配 */
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .header-trigger {
        height: 100%;
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.3s;
      }

      .trigger:hover {
        color: #1890ff;
      }

      /* 2. Tab标签页容器：占满中间空间，溢出时横向滚动 */
      .tab-container {
        flex: 1; /* 关键：占满剩余宽度 */
        margin: 0 8px;
        height: 100%;
        display: flex;
        align-items: center;
        overflow: hidden; /* 隐藏超出容器的内容 */
      }

      .tabs-wrapper {
        width: 100%;
        height: 100%;
        overflow-x: auto; /* 横向滚动 */
        white-space: nowrap; /* 禁止Tab换行 */
        /* 隐藏滚动条，保持美观 */
        scrollbar-width: none;
        -ms-overflow-style: none;
      }

      .tabs-wrapper::-webkit-scrollbar {
        display: none;
      }

      /* 优化Tab样式，确保垂直居中 */
      :host ::ng-deep .ant-tabs-card {
        height: 100%;
        display: flex;
        flex-direction: column;
      }

      :host ::ng-deep .ant-tabs-card .ant-tabs-card-bar {
        border-bottom: none;
        flex-shrink: 0; /* 禁止Tab栏被压缩 */
      }

      :host ::ng-deep .ant-tabs-card .ant-tabs-tab {
        height: 36px;
        line-height: 36px;
        margin-top: 8px; /* 与顶部保持间距 */
      }

      /* 3. Admin菜单容器：固定宽度，不压缩 */
      .user-menu-wrapper {
        width: 120px; /* 与Admin菜单宽度匹配 */
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .user-menu {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }

      /* 内容区域样式（保持不变） */
      nz-content {
        margin: 0;
        background-color: white;
      }

      .inner-content {
        padding: 24px;
        background: #fff;
        min-height: calc(100vh - 64px);
      }

      /* Tab标签页细节样式 */
      .tab-title {
        cursor: pointer;
      }

      .close-icon {
        margin-left: 8px;
        font-size: 12px;
        color: rgba(0, 0, 0, 0.45);
        cursor: pointer;
      }

      .close-icon:hover {
        color: #f5222d;
      }
    `,
  ],
  standalone: true,
  imports: [
    CommonModule,
    RouterOutlet,
    RouterModule,
    NzLayoutModule,
    NzMenuModule,
    NzIconModule,
    NzButtonModule,
    NzTabsModule,
  ],
})
export class MainLayoutComponent implements OnInit, OnDestroy, AfterViewInit {
  @ViewChild('tabsWrapper') tabsWrapper!: ElementRef<HTMLDivElement>;
  @ViewChild('content') content!: ElementRef;

  isCollapsed = true;
  openTabs: TabItem[] = [];
  activePath: string | null = null;
  private routerSubscription!: Subscription;

  private routeTitleMap: { [key: string]: string } = {
    '/dashboard': '数据看板',
    '/user': '用户管理',
    '/message-activity': '消息通知',
    '/message-record': '推送记录',
    '/message-template': '消息模板',
    '/message-strategy': '推送策略',
    '/message-statistics': '统计分析',
  };

  constructor(private router: Router, private authService: AuthService) {}

  ngOnInit(): void {
    // 监听路由变化，更新标签页
    this.routerSubscription = this.router.events
      .pipe(filter((event) => event instanceof NavigationEnd))
      .subscribe((event: NavigationEnd) => {
        const path = event.urlAfterRedirects.split('?')[0];
        this.activePath = path;

        // 新增未打开的标签页
        if (!this.openTabs.some((tab) => tab.path === path)) {
          const title = this.routeTitleMap[path] || '新页面';
          this.openTabs.push({ title, path });
        }
      });

    // 初始化当前路由标签页
    this.activePath = this.router.url.split('?')[0];
    if (
      this.activePath &&
      !this.openTabs.some((tab) => tab.path === this.activePath)
    ) {
      const title = this.routeTitleMap[this.activePath] || '新页面';
      this.openTabs.push({ title, path: this.activePath });
    }
  }

  ngAfterViewInit(): void {
    this.scrollToActiveTab();
  }

  ngOnDestroy(): void {
    if (this.routerSubscription) {
      this.routerSubscription.unsubscribe();
    }
  }

  // 获取当前标签页索引
  getTabIndex(path: string | null): number {
    return path ? this.openTabs.findIndex((tab) => tab.path === path) : -1;
  }

  // 切换标签页
  selectTab(path: string | undefined): void {
    if (path && this.activePath !== path) {
      this.router.navigateByUrl(path);
    }
  }

  // 关闭标签页
  closeTab(path: string, index: number): void {
    if (this.openTabs.length <= 1) return;

    this.openTabs = this.openTabs.filter((tab) => tab.path !== path);

    // 若关闭当前激活标签页，跳转至前一个标签页
    if (this.activePath === path) {
      const newIndex = Math.max(0, index - 1);
      this.router.navigateByUrl(this.openTabs[newIndex].path);
    }
  }

  // 退出登录
  logout(): void {
    this.authService.logout();
    this.router.navigate(['/login']);
  }

  // 滚动标签页（左右滚动）
  scrollTabs(direction: 'left' | 'right'): void {
    const wrapper = this.tabsWrapper.nativeElement;
    wrapper.scrollBy({
      left: direction === 'left' ? -150 : 150,
      behavior: 'smooth',
    });
  }

  // 滚动到当前激活标签页
  private scrollToActiveTab(): void {
    if (!this.tabsWrapper) return;

    const activeTab = this.tabsWrapper.nativeElement.querySelector(
      '.ant-tabs-tab-active'
    );
    if (activeTab) {
      activeTab.scrollIntoView({
        behavior: 'smooth',
        block: 'nearest',
        inline: 'center',
      });
    }
  }
}