<script setup lang="ts">
import { useRouter, useRoute } from "vue-router";

const router = useRouter();
const route = useRoute();

function isNavActive(path: string) {
  if (path === "/m") return route.path === "/m";
  return route.path.startsWith(path);
}
</script>

<template>
  <main class="mobile-messages">
    <header class="page-header">
      <button class="back-btn" @click="router.back()">
        <van-icon name="arrow-left" :size="20" />
      </button>
      <h1>消息</h1>
      <span class="header-spacer"></span>
    </header>

    <!-- 空状态 -->
    <van-empty description="暂无消息" image="search" />

    <!-- 底部导航 -->
    <nav class="bottom-nav">
      <RouterLink to="/m" class="nav-item" :class="{ active: isNavActive('/m') }">
        <van-icon name="home-o" :size="22" />
        <span>首页</span>
      </RouterLink>
      <RouterLink to="/m/messages" class="nav-item" :class="{ active: isNavActive('/m/messages') }">
        <van-icon name="chat-o" :size="22" />
        <span>消息</span>
      </RouterLink>
      <RouterLink to="/m/seller/listings/create" class="nav-item nav-publish">
        <div class="publish-pill">+</div>
        <span>发布</span>
      </RouterLink>
      <RouterLink to="/m/orders" class="nav-item" :class="{ active: isNavActive('/m/orders') }">
        <van-icon name="orders-o" :size="22" />
        <span>订单</span>
      </RouterLink>
      <RouterLink to="/m/profile" class="nav-item" :class="{ active: isNavActive('/m/profile') }">
        <van-icon name="manager-o" :size="22" />
        <span>我的</span>
      </RouterLink>
    </nav>
  </main>
</template>

<style scoped>
.mobile-messages {
  min-height: 100dvh;
  background: #f5f7fa;
  padding-bottom: 56px;
}

/* ========== 顶部导航 ========== */
.page-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 12px;
  background: #fff;
  border-bottom: 1px solid #eee;
}

.page-header h1 {
  flex: 1;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  text-align: center;
}

.back-btn {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: none;
  background: none;
  color: #333;
  cursor: pointer;
}

.header-spacer {
  width: 36px;
}

/* ========== 底部导航 ========== */
.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  height: 50px;
  background: #fff;
  border-top: 1px solid #eee;
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: #999;
  font-size: 10px;
  text-decoration: none;
}

.nav-item.active {
  color: #1477ff;
}

.nav-item span {
  font-weight: 600;
}

.publish-pill {
  width: 36px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: #ff6a00;
  color: #fff;
  font-size: 18px;
  font-weight: 900;
}

.nav-publish span {
  color: #ff6a00;
}
</style>
