<template>
  <div class="page-container">
    <!-- 搜索区域 -->
    <div class="search-form">
      <el-form :model="queryParams" inline>
        <el-form-item label="搜索">
          <el-input
            v-model="queryParams.search"
            placeholder="请输入用户名"
            style="width: 120px"
            clearable
            @keyup.enter="handleQuery"
          />
        </el-form-item>
        <el-form-item label="角色">
          <el-select v-model="queryParams.role" placeholder="请选择角色" style="width: 120px" clearable>
            <el-option label="管理员" value="admin" />
            <el-option label="操作员" value="operator" />
            <el-option label="观察者" value="viewer" />
          </el-select>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" :icon="Search" @click="handleQuery">搜索</el-button>
          <el-button :icon="Refresh" @click="resetQuery">重置</el-button>
        </el-form-item>
      </el-form>
    </div>

    <!-- 操作按钮 -->
    <div class="table-actions">
      <el-button type="primary" :icon="Plus" @click="handleAdd">新增用户</el-button>
      <el-button type="success" :icon="Refresh" @click="getList">刷新列表</el-button>
    </div>

    <!-- 数据表格 -->
    <el-table v-loading="loading" :data="userList" border>
      <el-table-column type="index" label="序号" width="60" align="center" />
      <el-table-column prop="username" label="用户名" min-width="150" />
      <el-table-column prop="role" label="角色" width="120" align="center">
        <template #default="{ row }">
          <el-tag :type="getRoleTagType(row.role)">{{ getRoleLabel(row.role) }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="createdAt" label="创建时间" width="180" align="center">
        <template #default="{ row }">
          {{ formatTime(row.createdAt) }}
        </template>
      </el-table-column>
      <el-table-column prop="updatedAt" label="更新时间" width="180" align="center">
        <template #default="{ row }">
          {{ formatTime(row.updatedAt) }}
        </template>
      </el-table-column>
      <el-table-column label="操作" width="220" align="center" fixed="right">
        <template #default="{ row }">
          <el-button type="primary" link :icon="Edit" @click="handleEdit(row)">编辑</el-button>
          <el-button type="warning" link :icon="Key" @click="handleResetPassword(row)">重置密码</el-button>
          <el-button type="danger" link :icon="Delete" @click="handleDelete(row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <el-pagination
      v-model:current-page="queryParams.page"
      v-model:page-size="queryParams.pageSize"
      :page-sizes="[10, 20, 50, 100]"
      :total="total"
      layout="total, sizes, prev, pager, next, jumper"
      class="pagination"
      @size-change="getList"
      @current-change="getList"
    />

    <!-- 新增/编辑弹窗 -->
    <el-dialog v-model="dialogVisible" :title="dialogTitle" width="500px" destroy-on-close>
      <el-form ref="formRef" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="form.username" placeholder="请输入用户名" :disabled="isEdit" />
        </el-form-item>
        <el-form-item v-if="!isEdit" label="密码" prop="password">
          <el-input v-model="form.password" type="password" placeholder="请输入密码" show-password />
        </el-form-item>
        <el-form-item label="角色" prop="role">
          <el-select v-model="form.role" placeholder="请选择角色" style="width: 100%">
            <el-option label="管理员" value="admin" />
            <el-option label="操作员" value="operator" />
            <el-option label="观察者" value="viewer" />
          </el-select>
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button @click="dialogVisible = false">取消</el-button>
        <el-button type="primary" :loading="submitLoading" @click="handleSubmit">确定</el-button>
      </template>
    </el-dialog>

    <!-- 重置密码弹窗 -->
    <el-dialog v-model="resetDialogVisible" title="重置密码" width="400px" destroy-on-close>
      <el-form ref="resetFormRef" :model="resetForm" :rules="resetRules" label-width="80px">
        <el-form-item label="新密码" prop="password">
          <el-input v-model="resetForm.password" type="password" placeholder="请输入新密码" show-password />
        </el-form-item>
        <el-form-item label="确认密码" prop="confirmPassword">
          <el-input v-model="resetForm.confirmPassword" type="password" placeholder="请再次输入密码" show-password />
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button @click="resetDialogVisible = false">取消</el-button>
        <el-button type="primary" :loading="resetLoading" @click="handleResetSubmit">确定</el-button>
      </template>
    </el-dialog>
  </div>
</template>

<script setup lang="ts">
import { ref, reactive, computed, onMounted } from 'vue'
import { ElMessage, ElMessageBox, type FormInstance, type FormRules } from 'element-plus'
import { Search, Refresh, Plus, Edit, Delete, Key } from '@element-plus/icons-vue'
import { listUsers, createUser, updateUser, deleteUser, resetPassword, type User, type UserForm } from '@/api/user'

const loading = ref(false)
const submitLoading = ref(false)
const resetLoading = ref(false)
const userList = ref<User[]>([])
const total = ref(0)
const dialogVisible = ref(false)
const resetDialogVisible = ref(false)
const formRef = ref<FormInstance>()
const resetFormRef = ref<FormInstance>()
const currentUserId = ref('')

const queryParams = reactive({
  page: 1,
  pageSize: 10,
  search: '',
  role: '' as '' | 'admin' | 'operator' | 'viewer'
})

const form = reactive<UserForm & { id?: string }>({
  username: '',
  password: '',
  role: 'viewer'
})

const resetForm = reactive({
  password: '',
  confirmPassword: ''
})

const isEdit = computed(() => !!form.id)
const dialogTitle = computed(() => (isEdit.value ? '编辑用户' : '新增用户'))

const rules: FormRules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 3, max: 20, message: '用户名长度为3-20个字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 6, max: 20, message: '密码长度为6-20个字符', trigger: 'blur' }
  ],
  role: [{ required: true, message: '请选择角色', trigger: 'change' }]
}

const validateConfirmPassword = (_rule: any, value: string, callback: Function) => {
  if (value !== resetForm.password) {
    callback(new Error('两次输入的密码不一致'))
  } else {
    callback()
  }
}

const resetRules: FormRules = {
  password: [
    { required: true, message: '请输入新密码', trigger: 'blur' },
    { min: 6, max: 20, message: '密码长度为6-20个字符', trigger: 'blur' }
  ],
  confirmPassword: [
    { required: true, message: '请再次输入密码', trigger: 'blur' },
    { validator: validateConfirmPassword, trigger: 'blur' }
  ]
}

function getRoleLabel(role: string) {
  const map: Record<string, string> = {
    admin: '管理员',
    operator: '操作员',
    viewer: '观察者'
  }
  return map[role] || role
}

function getRoleTagType(role: string) {
  const map: Record<string, '' | 'success' | 'warning' | 'info' | 'danger'> = {
    admin: 'danger',
    operator: 'warning',
    viewer: 'info'
  }
  return map[role] || 'info'
}

function formatTime(time?: string) {
  if (!time) return '-'
  return new Date(time).toLocaleString('zh-CN')
}

async function getList() {
  loading.value = true
  try {
    // Filter out empty strings to avoid validation errors
    const params: any = {
      page: queryParams.page,
      pageSize: queryParams.pageSize
    }
    if (queryParams.search) params.search = queryParams.search
    if (queryParams.role) params.role = queryParams.role

    const res = await listUsers(params)
    if (res.success) {
      userList.value = res.data.list
      total.value = Number(res.data.total)
    }
  } finally {
    loading.value = false
  }
}

function handleQuery() {
  queryParams.page = 1
  getList()
}

function resetQuery() {
  queryParams.page = 1
  queryParams.search = ''
  queryParams.role = ''
  getList()
}

function handleAdd() {
  Object.assign(form, {
    id: undefined,
    username: '',
    password: '',
    role: 'viewer'
  })
  dialogVisible.value = true
}

function handleEdit(row: User) {
  Object.assign(form, {
    id: row.id,
    username: row.username,
    password: '',
    role: row.role
  })
  dialogVisible.value = true
}

function handleResetPassword(row: User) {
  currentUserId.value = row.id
  resetForm.password = ''
  resetForm.confirmPassword = ''
  resetDialogVisible.value = true
}

async function handleDelete(row: User) {
  try {
    await ElMessageBox.confirm(`确定要删除用户 "${row.username}" 吗？`, '提示', {
      type: 'warning'
    })
    const res = await deleteUser(row.id)
    if (res.success) {
      ElMessage.success('删除成功')
      getList()
    }
  } catch (error) {
    if (error !== 'cancel') {
      console.error('删除失败', error)
    }
  }
}

async function handleSubmit() {
  if (!formRef.value) return

  await formRef.value.validate(async (valid) => {
    if (valid) {
      submitLoading.value = true
      try {
        let res
        if (form.id) {
          const { password, ...updateData } = form
          res = await updateUser(form.id, updateData)
        } else {
          res = await createUser(form)
        }
        if (res.success) {
          ElMessage.success(form.id ? '修改成功' : '新增成功')
          dialogVisible.value = false
          getList()
        }
      } finally {
        submitLoading.value = false
      }
    }
  })
}

async function handleResetSubmit() {
  if (!resetFormRef.value) return

  await resetFormRef.value.validate(async (valid) => {
    if (valid) {
      resetLoading.value = true
      try {
        const res = await resetPassword(currentUserId.value, resetForm.password)
        if (res.success) {
          ElMessage.success('密码重置成功')
          resetDialogVisible.value = false
        }
      } finally {
        resetLoading.value = false
      }
    }
  })
}

onMounted(() => {
  getList()
})
</script>

<style lang="scss" scoped>
.page-container {
  padding: var(--content-padding);
  height: 100%;
  overflow-y: auto;
}

.search-form {
  background-color: var(--bg-container);
  border-radius: var(--radius-base);
}

.table-actions {
  margin-bottom: 15px;
}

.pagination {
  margin-top: 20px;
  justify-content: flex-end;
}
</style>
