<template>
  <div class="upload-file">

    <div class="upload-tip">建议比例1:1，不超过60s，视频{{ fileSize }}MB以内</div>
    <el-upload multiple :action="uploadFileUrl" :before-upload="handleBeforeUpload" :file-list="fileList" :data="data"
      :limit="limit" :on-error="handleUploadError" :on-exceed="handleExceed" :on-success="handleUploadSuccess"
      :show-file-list="true" :headers="headers" class="upload-file-uploader" list-type="picture-card" ref="fileUpload"
      v-if="!disabled" :class="{ hide: fileList.length >= limit }">
      <!-- 上传按钮 -->
      <el-icon size="30px" color="red">
        <Plus />
      </el-icon>
      <div class="el-upload__text">上传视频</div>

      <!-- 自定义文件列表项 -->
      <template #file="{ file }">
        <div class="custom-upload-item">
          <video :src="`${baseUrl}${file.url}`" class="el-upload-list__item-thumbnail" controls
            @click.stop="handleVideoPlay(file)"></video>

          <!-- 自定义删除按钮（带文字） -->
          <span class="custom-delete-btn" @click.stop="handleDelete(file)">
            <el-icon>
              <Delete />
            </el-icon>
            <span>删除</span>
          </span>
        </div>
      </template>
    </el-upload>
    <!-- <div class="upload-hint">至多可上传{{ limit }}个视频</div> -->

    <el-dialog v-model="dialogVisible" title="视频预览" width="800px" append-to-body>
      <video ref="previewVideo" :src="dialogVideoUrl" controls autoplay
        style="display: block; max-width: 100%; margin: 0 auto"></video>
    </el-dialog>
    <!-- 上传提示 -->
    <!-- <div class="el-upload__tip" v-if="showTip && !disabled">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
<template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
的文件
</div> -->
    <!-- 文件列表 -->
    <!-- <transition-group ref="uploadFileList" class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList">
        <el-link :href="`${baseUrl}${file.url}`" :underline="false" target="_blank">
          <span class="el-icon-document"> {{ getFileName(file.name) }} </span>
        </el-link>
        <div class="ele-upload-list__item-content-action">
          <el-link :underline="false" @click="handleDelete(index)" type="danger" v-if="!disabled">&nbsp;删除</el-link>
        </div>
      </li>
    </transition-group> -->
  </div>
</template>

<script setup>
import { getToken } from "@/utils/auth"
import Sortable from 'sortablejs'
import { ref, nextTick } from "vue"

const props = defineProps({
  modelValue: [String, Object, Array],
  // 上传接口地址
  action: {
    type: String,
    default: "/uploadApis/upload"
  },
  // 上传携带的参数
  data: {
    type: Object
  },
  // 数量限制
  limit: {
    type: Number,
    default: 1
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 100
  },
  // 文件类型
  fileType: {
    type: Array,
    default: () => ["mp4", "mov", "avi", "wmv", "flv", "mkv", "webm"]
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  // 禁用组件（仅查看文件）
  disabled: {
    type: Boolean,
    default: false
  },
  // 拖动排序
  drag: {
    type: Boolean,
    default: true
  }
})

const { proxy } = getCurrentInstance()
const emit = defineEmits()
const number = ref(0)
const uploadList = ref([])
const baseUrl = import.meta.env.VITE_APP_BASE_API
const uploadFileUrl = ref(import.meta.env.VITE_APP_BASE_API + props.action) // 上传文件服务器地址
const headers = ref({ Authorization: "Bearer " + getToken() })
const fileList = ref([])
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
)
let dialogVisible = ref(false);
let dialogVideoUrl = ref("");
let previewVideo = ref(null);

watch(() => props.modelValue, val => {
  if (val) {
    let temp = 1
    // 首先将值转为数组
    const list = Array.isArray(val) ? val : props.modelValue.split(',')
    // 然后将数组转为对象数组
    fileList.value = list.map(item => {
      if (typeof item === "string") {
        item = { name: item, url: item }
      }
      item.uid = item.uid || new Date().getTime() + temp++
      return item
    })
  } else {
    fileList.value = []
    return []
  }
}, { deep: true, immediate: true })

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  // 校检文件类型
  if (props.fileType.length) {
    const fileName = file.name.split('.')
    const fileExt = fileName[fileName.length - 1]
    const isTypeOk = props.fileType.indexOf(fileExt) >= 0
    if (!isTypeOk) {
      proxy.$modal.msgError(`文件格式不正确，请上传${props.fileType.join("/")}格式文件!`)
      return false
    }
  }
  // 校检文件名是否包含特殊字符
  if (file.name.includes(',')) {
    proxy.$modal.msgError('文件名不正确，不能包含英文逗号!')
    return false
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`)
      return false
    }
  }
  proxy.$modal.loading("正在上传文件，请稍候...")
  number.value++
  return true
}

// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`)
}

// 上传失败
function handleUploadError(err) {
  proxy.$modal.msgError("上传文件失败")
  proxy.$modal.closeLoading()
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  if (res.code === 200) {
    uploadList.value.push({ name: res.data.name, url: res.data.url })
    uploadList.value.forEach(item => {
      item.url = "http://gov-cloud.oss-cn-chengdu.aliyuncs.com/" + item.url;
    })
    uploadedSuccessfully()
  } else {
    number.value--
    proxy.$modal.closeLoading()
    proxy.$modal.msgError(res.msg)
    proxy.$refs.fileUpload.handleRemove(file)
    uploadedSuccessfully()
  }
}

// 删除文件
function handleDelete(index) {
  fileList.value.splice(index, 1)
  emit("update:modelValue", listToString(fileList.value))
}

// 上传结束处理
function uploadedSuccessfully() {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value)
    uploadList.value = []
    number.value = 0
    emit("update:modelValue", listToString(fileList.value))
    proxy.$modal.closeLoading()
  }
}

// 新增的视频播放处理方法
function handleVideoPlay(file) {
  dialogVideoUrl.value = file.url;
  dialogVisible.value = true;

  // 确保对话框完全打开后再播放
  nextTick(() => {
    const video = previewVideo.value;
    if (video) {
      video.load();
      video.play().catch(e => {
        console.log("自动播放失败:", e);
      });
    }
  });
}

// 获取文件名称
function getFileName(name) {
  // 如果是url那么取最后的名字 如果不是直接返回
  if (name.lastIndexOf("/") > -1) {
    return name.slice(name.lastIndexOf("/") + 1)
  } else {
    return name
  }
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = ""
  separator = separator || ","
  for (let i in list) {
    if (list[i].url) {
      strs += list[i].url + separator
    }
  }
  return strs != '' ? strs.substr(0, strs.length - 1) : ''
}

// 初始化拖拽排序
onMounted(() => {
  if (props.drag && !props.disabled) {
    nextTick(() => {
      const element = proxy.$refs.uploadFileList?.$el || proxy.$refs.uploadFileList
      Sortable.create(element, {
        ghostClass: 'file-upload-darg',
        onEnd: (evt) => {
          const movedItem = fileList.value.splice(evt.oldIndex, 1)[0]
          fileList.value.splice(evt.newIndex, 0, movedItem)
          emit('update:modelValue', listToString(fileList.value))
        }
      })
    })
  }
})
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
:deep(.hide .el-upload--picture-card) {
  display: none;
}

.file-upload-darg {
  opacity: 0.5;
  background: #c8ebfb;
}

.upload-file-uploader {
  margin-bottom: 5px;
}

.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
  transition: none !important;
}

.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}

.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}

// 上传提示文字
.upload-tip {
  color: #999;
  font-size: 12px;
  margin-bottom: 10px;
}

.el-upload__text {
  font-size: 12px;
  line-height: 30px;
  color: #666;
}

:deep(.el-upload--picture-card) {
  width: 120px;
  height: 120px;
  line-height: 100px;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}
</style>
