<template>
  <aside class="rail" aria-label="主导航">
    <div class="rail-brand">
      <div class="brand-mark" aria-hidden="true">
        <svg viewBox="0 0 36 36">
          <path d="M19.8 4.5c5.7 1.1 9.9 5.7 10.5 11.6-2.8-.9-5.5-.7-7.9.6-2.8 1.5-4.5 4.3-5.2 8.2-4.4-2.8-6.5-6.5-6.3-11.1.2-4.2 3.5-7.8 8.9-9.3Z" />
          <path d="M9 7.6c-3 3.5-4 7.3-2.9 11.2 1.2 4.2 4.6 7 10.1 8.5-2 1.8-4.6 2.6-7.6 2.3C5.1 26.7 3.5 23.1 3.7 19 4 14.4 5.7 10.6 9 7.6Z" />
        </svg>
      </div>
      <strong class="brand-name">星海科技</strong>
      <button class="brand-toggle" type="button" aria-label="打开 AI 助手" @click="emit('openChat')">
        <i class="pi pi-angle-double-left"></i>
      </button>
    </div>

    <nav class="rail-nav" aria-label="功能导航">
      <button
        v-for="item in decoratedNavItems"
        :key="item.id"
        class="nav-btn"
        :class="{ active: activeView === item.id }"
        type="button"
        @click="emit('navigate', item.id)"
      >
        <span class="nav-icon" v-html="item.icon"></span>
        <span class="nav-label">{{ item.displayLabel }}</span>
        <span v-if="item.badge" class="nav-badge">{{ item.badge }}</span>
      </button>
    </nav>

    <button class="rail-user" type="button" aria-label="打开用户菜单">
      <span class="user-avatar">张</span>
      <span class="user-copy">
        <strong>张晓明</strong>
        <span>财务管理员</span>
      </span>
      <i class="pi pi-angle-down"></i>
    </button>
  </aside>
</template>

<script setup>
import { computed } from 'vue'

const props = defineProps({
  navItems: { type: Array, required: true },
  activeView: { type: String, required: true }
})

const emit = defineEmits(['navigate', 'openChat'])

const sidebarMeta = {
  overview: { label: '总览' },
  requests: { label: '差旅申请/报销' },
  chat: { label: 'AI助手' },
  policies: { label: '政策规则' },
  audit: { label: '审计追踪' }
}

const decoratedNavItems = computed(() =>
  props.navItems.map((item) => ({
    ...item,
    displayLabel: sidebarMeta[item.id]?.label ?? item.label,
    badge: sidebarMeta[item.id]?.badge
  }))
)
</script>

<style scoped>
.rail {
  position: sticky;
  top: 0;
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background:
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,250,.96)),
    #fff;
  border-right: 1px solid #dbe4ee;
  box-shadow: 1px 0 0 rgba(15,23,42,.02);
  z-index: 20;
}

.rail-brand {
  min-height: 86px;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 28px;
  align-items: center;
  gap: 10px;
  padding: 22px 20px 18px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: #07936f;
}

.brand-mark svg {
  width: 30px;
  height: 30px;
  fill: currentColor;
}

.brand-name {
  min-width: 0;
  color: #0f172a;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-toggle {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #718096;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.brand-toggle:hover {
  background: #eef7f4;
  color: #07936f;
}

.rail-nav {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 16px 20px;
  overflow-y: auto;
}

.nav-btn {
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: #64748b;
  text-align: left;
  transition:
    background 180ms var(--ease),
    border-color 180ms var(--ease),
    color 180ms var(--ease),
    box-shadow 180ms var(--ease);
}

.nav-btn:hover {
  background: rgba(16,185,129,.07);
  color: #0f9f78;
}

.nav-btn.active {
  background: linear-gradient(90deg, rgba(16,185,129,.16), rgba(16,185,129,.08));
  border-color: rgba(16,185,129,.10);
  color: #059669;
  box-shadow: inset 3px 0 0 #10b981;
}

.nav-icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: currentColor;
}

.nav-btn :deep(svg) {
  width: 19px;
  height: 19px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-label {
  min-width: 0;
  color: currentColor;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-badge {
  min-width: 34px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border-radius: 999px;
  background: #ff5b67;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}

.rail-user {
  min-width: 0;
  min-height: 74px;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 16px 20px 18px;
  border: 0;
  border-top: 1px solid transparent;
  background: transparent;
  color: #64748b;
  text-align: left;
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.rail-user:hover {
  border-top-color: #e2e8f0;
  background: rgba(255,255,255,.72);
}

.user-avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 2px solid #fff;
  border-radius: 999px;
  background: linear-gradient(135deg, #0f9f78, #65d6b4);
  box-shadow: 0 6px 14px rgba(15,159,120,.18);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.user-copy {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.user-copy strong {
  color: #334155;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-copy span {
  color: #64748b;
  font-size: 12px;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rail-user .pi {
  justify-self: end;
  color: #718096;
  font-size: 13px;
}

@media (max-width: 980px) {
  .rail {
    position: relative;
    height: auto;
  }
}

@media (max-width: 760px) {
  .rail {
    border-right: 0;
    border-bottom: 1px solid #dbe4ee;
  }

  .rail-brand {
    min-height: 68px;
    padding: 16px;
  }

  .rail-nav {
    display: flex;
    gap: 10px;
    padding: 8px 16px 16px;
    overflow-x: auto;
  }

  .nav-btn {
    min-width: 148px;
  }

  .rail-user {
    display: none;
  }
}
</style>
