<template>
  <div class="page-wrapper">
    <!-- 搜索区域 -->
    <el-card shadow="never" class="search-card">
      <template #header>
        <div class="card-header-title">
          <el-icon><Search /></el-icon>
          <span>搜索条件</span>
        </div>
      </template>
      <el-form :model="query" inline>
        <el-form-item label="角色名称">
          <el-input v-model="query.roleName" placeholder="请输入角色名称" clearable />
        </el-form-item>
        <el-form-item label="所属系统">
          <el-select v-model="query.systemId" placeholder="全部" clearable style="width: 180px">
            <el-option
              v-for="sys in systemList"
              :key="sys.systemId"
              :label="sys.systemName"
              :value="sys.systemId"
            />
          </el-select>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="handleSearch">
            <el-icon><Search /></el-icon>
            搜索
          </el-button>
          <el-button @click="handleReset">重置</el-button>
        </el-form-item>
      </el-form>
    </el-card>

    <!-- 操作栏 -->
    <div class="toolbar">
      <el-button type="primary" @click="handleAdd">
        <el-icon><Plus /></el-icon>
        新增角色
      </el-button>
    </div>

    <!-- 表格 -->
    <el-card shadow="never">
      <el-table :data="tableData" border stripe v-loading="loading" style="width: 100%">
        <el-table-column prop="roleName" label="角色名称" width="140" />
        <el-table-column prop="roleCode" label="角色编码" width="140" />
        <el-table-column prop="systemName" label="所属系统" width="150" />
        <el-table-column prop="description" label="描述" min-width="160" show-overflow-tooltip />
        <el-table-column prop="status" label="状态" width="90" align="center">
          <template #default="{ row }">
            <el-tag :type="row.status === 1 ? 'success' : 'danger'" effect="dark" size="small">
              {{ row.status === 1 ? '启用' : '禁用' }}
            </el-tag>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="310" align="center" class-name="ops-col">
          <template #default="{ row }">
            <div class="actions">
              <el-button type="primary" size="small" plain @click="handleEdit(row)">编辑</el-button>
              <el-button type="danger" size="small" plain @click="handleDelete(row)">删除</el-button>
              <el-button type="success" size="small" plain @click="handleAssignMenu(row)">分配菜单</el-button>
            </div>
          </template>
        </el-table-column>
        <template #empty>
          <el-empty description="暂无角色数据" :image-size="100" />
        </template>
      </el-table>

      <div class="pagination-wrapper">
        <el-pagination
          v-model:current-page="query.page"
          v-model:page-size="query.pageSize"
          :total="total"
          :page-sizes="[10, 20, 50, 100]"
          layout="total, sizes, prev, pager, next, jumper"
          background
          @current-change="fetchData"
          @size-change="fetchData"
        />
      </div>
    </el-card>

    <!-- 分配菜单弹窗 -->
    <el-dialog
      v-model="menuVisible"
      title="分配菜单"
      width="500px"
      :close-on-click-modal="false"
    >
      <el-tree
        ref="menuTreeRef"
        :data="menuTreeData"
        node-key="id"
        show-checkbox
        default-expand-all
        :props="{ label: 'menuName', children: 'children' }"
        style="max-height: 400px; overflow-y: auto"
      />
      <template #footer>
        <el-button @click="menuVisible = false">取消</el-button>
        <el-button type="primary" :loading="menuSubmitLoading" @click="submitAssignMenu">确定</el-button>
      </template>
    </el-dialog>
  </div>
</template>

<script setup lang="ts">
import { reactive, ref } from 'vue'
import { useRouter } from 'vue-router'
import { ElMessage, ElMessageBox } from 'element-plus'
import { Search, Plus } from '@element-plus/icons-vue'
import type { ElTree } from 'element-plus'
import request from '@/utils/request'

/** 角色类型 */
interface RoleItem {
  id?: string
  roleName: string
  roleCode: string
  systemId: string | undefined
  systemName?: string
  description: string
  status: number
}

interface SystemItem {
  id: string
  systemId: string
  systemName: string
}

interface MenuNode {
  id: string
  menuName: string
  children?: MenuNode[]
}

// --- 查询 ---
const query = reactive({
  page: 1,
  pageSize: 10,
  roleName: '',
  systemId: undefined as string | undefined,
})

const tableData = ref<RoleItem[]>([])
const total = ref(0)
const loading = ref(false)
const systemList = ref<SystemItem[]>([])

async function fetchSystemList() {
  try {
    const res = await request.get('/zgapi/v1/auth/system/list')
    systemList.value = res.data ?? []
  } catch {
    // ignore
  }
}

async function fetchData() {
  loading.value = true
  try {
    const params: Record<string, unknown> = {
      page: query.page,
      pageSize: query.pageSize,
    }
    if (query.roleName) params.roleName = query.roleName
    if (query.systemId != null) params.systemId = query.systemId

    const res = await request.post('/zgapi/v1/admin/role/page', params)
    tableData.value = res.data?.records ?? []
    total.value = res.data?.total ?? 0
  } catch {
    // ignore
  } finally {
    loading.value = false
  }
}

function handleSearch() {
  query.page = 1
  fetchData()
}

function handleReset() {
  query.roleName = ''
  query.systemId = undefined
  query.page = 1
  fetchData()
}

// --- 新增/编辑（路由跳转到独立表单页）---
const router = useRouter()

function handleAdd() {
  router.push('/admin/role/form')
}

function handleEdit(row: RoleItem) {
  router.push('/admin/role/form/' + row.id)
}

function handleDelete(row: RoleItem) {
  ElMessageBox.confirm(`确认删除角色"${row.roleName}"吗？`, '删除确认', {
    type: 'warning',
    confirmButtonText: '确认',
    cancelButtonText: '取消',
  }).then(async () => {
    try {
      await request.delete(`/zgapi/v1/admin/role/${row.id}`)
      ElMessage.success('删除成功')
      fetchData()
    } catch {
      // ignore
    }
  }).catch(() => {})
}

// --- 分配菜单 ---
const menuVisible = ref(false)
const menuTreeData = ref<MenuNode[]>([])
const menuSubmitLoading = ref(false)
const menuRoleId = ref<string>()
const menuTreeRef = ref<InstanceType<typeof ElTree>>()

async function handleAssignMenu(row: RoleItem) {
  menuRoleId.value = row.id
  const sysId = row.systemId
  if (!sysId) {
    ElMessage.warning('该角色未关联系统，无法分配菜单')
    return
  }
  menuVisible.value = true
  menuTreeData.value = []

  // 并行加载菜单树 + 已分配的菜单ID
  try {
    const [treeRes, checkedRes] = await Promise.all([
      request.get('/zgapi/v1/admin/menu/tree', { params: { systemId: sysId } }),
      request.get(`/zgapi/v1/admin/role/${row.id}/menu`),
    ])
    menuTreeData.value = treeRes.data ?? []
    // 预选已分配的菜单
    const checkedIds: string[] = checkedRes.data ?? []
    // 等 DOM 更新后设置勾选
    await new Promise(r => setTimeout(r, 50))
    menuTreeRef.value?.setCheckedKeys(checkedIds)
  } catch {
    ElMessage.error('加载菜单树失败')
  }
}

async function submitAssignMenu() {
  const checkedKeys = menuTreeRef.value?.getCheckedKeys() as string[]
  const halfCheckedKeys = menuTreeRef.value?.getHalfCheckedKeys() as string[]
  const menuIds = [...checkedKeys, ...halfCheckedKeys]

  menuSubmitLoading.value = true
  try {
    await request.post(`/zgapi/v1/admin/role/${menuRoleId.value}/menu`, menuIds)
    ElMessage.success('分配菜单成功')
    menuVisible.value = false
  } catch {
    // ignore
  } finally {
    menuSubmitLoading.value = false
  }
}

// 初始化
fetchData()
fetchSystemList()
</script>

<style scoped>
.page-wrapper {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-header-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: #303133;
}

.toolbar {
  display: flex;
  justify-content: flex-start;
}

.pagination-wrapper {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

@media (max-width: 768px) {
  .page-wrapper { gap: 10px; }
  .page-toolbar { flex-direction: column; gap: 10px; }
  .page-toolbar .el-select { width: 100% !important; }
}
</style>
