<script setup lang="ts">
import type { ExperimentRecord, Contest } from '../types'
import { HomeFilled } from '@element-plus/icons-vue'
import { ElMessageBox, ElMessage } from 'element-plus'
import { upload } from '@/utils/upload'
import { getContest, getExperimentRecord, uploadExperimentPicture } from '../api'
import dayjs from 'dayjs'
import { useStorage } from '@vueuse/core'

const Book = defineAsyncComponent(() => import('../components/Book.vue'))
const Video = defineAsyncComponent(() => import('../components/Video.vue'))
const Discuss = defineAsyncComponent(() => import('../components/Discuss.vue'))
const Result = defineAsyncComponent(() => import('../components/Result.vue'))

interface Props {
  id: string
}
const props = defineProps<Props>()

// 获取赛项信息
let competition = $ref<Contest>()
function fetchCompetition() {
  getContest({ id: props.id }).then(res => {
    competition = res.data.detail
  })
}
onMounted(() => {
  fetchCompetition()
})

// 左侧
const leftPanelVisible = $ref<boolean>(true)
const leftPanelWidth = useStorage('leftPanelWidth', 400)
const leftPanelWidthText = $computed(() => {
  return `${leftPanelWidth.value}px`
})

let detail = $ref<ExperimentRecord>()
provide('detail', $$(detail))

function fetchInfo() {
  getExperimentRecord({ competition_id: props.id }).then(res => {
    const data = res.data.detail || {}
    let pictures = []
    try {
      pictures = JSON.parse(data.pictures)
    } catch (error) {
      console.log(error)
    }
    detail = Object.assign(data, { pictures })
  })
}
watchEffect(() => {
  fetchInfo()
})

// 右侧
let iframeKey = $ref(Date.now())
// 返回首页
function handleBackHome() {
  ElMessageBox.confirm('此操作将会强制返回到实验室首页，您当前的操作内容有可能丢失，确定返回首页吗？', '提示').then(
    () => {
      iframeKey = Date.now()
    }
  )
}

const iframeRef = $ref<HTMLIFrameElement>()

let screenshotLoading = $ref(false)
let screenshotTimestamp = $ref(0)
// 截图
function handleCapture() {
  const pictures = detail?.pictures || []
  if (pictures.length >= 20) {
    ElMessage.error('已达到单个实验最大截图数量，无法截图，请在过程与结果功能中删除多余截图之后再进行操作。')
    return
  }
  const iframeWindow = iframeRef?.contentWindow
  if (!iframeWindow) return
  screenshotTimestamp = Date.now()
  screenshotLoading = true
  // 发送截图消息
  iframeWindow?.postMessage({ action: 'screenshot', timestamp: screenshotTimestamp }, '*')
}
// 截图之后
function handleCaptureCallback(event: MessageEvent) {
  const { data } = event
  if (data.action === 'screenshot' && data.timestamp === screenshotTimestamp) {
    upload(data.blob).then(url => {
      uploadPicture(url)
    })
  }
}
onMounted(() => {
  window.addEventListener('message', handleCaptureCallback, false)
  dragControllerDiv()
})
onUnmounted(() => {
  window.removeEventListener('message', handleCaptureCallback, false)
})

// 上传截图
function uploadPicture(url: string) {
  const pictures = detail?.pictures || []
  pictures.unshift({ url, name: Date.now() + '.png', upload_time: dayjs().format('YYYY-MM-DD HH:mm:ss'), size: 1024 })
  uploadExperimentPicture({ competition_id: props.id, pictures: JSON.stringify(pictures) }).then(() => {
    fetchInfo()
    screenshotLoading = false
  })
}

// 拖拽改变左侧宽度
// 因为鼠标移动文档和iframe影响不能move
let dragFlag = $ref(false)
let bookKey = $ref(0)
watchEffect(() => {
  if (!dragFlag) {
    bookKey = Date.now()
  }
})
function dragControllerDiv() {
  const dragDom = document.getElementById('panel-resize')
  if (dragDom) {
    dragDom.addEventListener('mousedown', e => {
      e.preventDefault()
      dragFlag = true
      document.onmousemove = e => {
        leftPanelWidth.value = e.clientX
      }
      document.onmouseup = () => {
        document.onmousemove = null
        document.onmouseup = null
        dragFlag = false
      }
    })
  }
}
</script>

<template>
  <section class="lab">
    <div class="lab-left" :class="{ 'is-hidden': !leftPanelVisible }">
      <div class="lab-left__inner">
        <h1>{{ competition?.name }}</h1>
        <el-tabs type="border-card">
          <el-tab-pane label="实训指导" lazy>
            <div class="pop" v-if="dragFlag"></div>
            <Book :competition_id="id" :key="bookKey"></Book>
          </el-tab-pane>
          <el-tab-pane label="操作视频" lazy>
            <Video :competition_id="id"></Video>
          </el-tab-pane>
          <el-tab-pane label="讨论交流" lazy>
            <Discuss :competition_id="id"></Discuss>
          </el-tab-pane>
          <el-tab-pane label="过程与结果" lazy>
            <Result :competition_id="id" @update="fetchInfo"></Result>
          </el-tab-pane>
        </el-tabs>
      </div>
      <div class="panel-resize" id="panel-resize"></div>
      <div class="panel-icon" @click="leftPanelVisible = !leftPanelVisible">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 86" aria-hidden="true" width="16" height="86">
          <g fill="none" fill-rule="evenodd">
            <path
              class="path-wapper"
              d="M0 0l14.12 8.825A4 4 0 0116 12.217v61.566a4 4 0 01-1.88 3.392L0 86V0z"
              fill="#e1e4eb"></path>
            <path
              class="path-arrow"
              d="M10.758 48.766a.778.778 0 000-1.127L6.996 43l3.762-4.639a.778.778 0 000-1.127.85.85 0 00-1.172 0l-4.344 5.202a.78.78 0 000 1.128l4.344 5.202a.85.85 0 001.172 0z"
              fill="#8D9EA7"
              fill-rule="nonzero"></path>
          </g>
        </svg>
      </div>
    </div>
    <div class="lab-right">
      <AppCard>
        <el-row justify="space-between">
          <el-button type="primary" :icon="HomeFilled" @click="handleBackHome">返回首页</el-button>
          <div>
            <el-button type="primary" :loading="screenshotLoading" @click="handleCapture">截图</el-button>
          </div>
        </el-row>
      </AppCard>
      <div class="lab-box">
        <div class="pop" v-if="dragFlag"></div>
        <iframe
          :src="competition?.train_platform_uri"
          :key="iframeKey"
          frameborder="0"
          class="iframe"
          ref="iframeRef"></iframe>
      </div>
    </div>
  </section>
</template>

<style lang="scss" scoped>
.lab {
  display: flex;
  height: calc(100vh - 110px);
}
.lab-left {
  position: relative;
  width: v-bind(leftPanelWidthText);
  padding: 20px;
  background-color: #e1e4eb;
  border-radius: 6px;
  box-sizing: border-box;
  transition: all 0.1s;
  &.is-hidden {
    width: 0 !important;
    padding: 0;
    .panel-resize {
      display: none;
    }
    .panel-icon {
      left: -20px;
      right: 0;
    }
    .path-arrow {
      transform-origin: center center;
      transform: rotate(180deg);
    }
  }
  .lab-left__inner {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    overflow: hidden;
    h1 {
      margin-bottom: 20px;
    }
  }
  .el-tabs {
    flex: 1;
    border: 0;
    overflow: hidden;
  }
  :deep(.el-tabs__header) {
    background-color: #e1e4eb;
  }
  :deep(.el-tabs__item) {
    padding: 0 14px !important;
    border: 0;
    border-radius: 6px 6px 0px 0px;
  }
  :deep(.el-tabs__content) {
    height: calc(100% - 40px);
    box-sizing: border-box;
  }
  :deep(.el-tab-pane) {
    height: 100%;
    overflow-y: auto;
  }
}
.panel-resize {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 20px;
  cursor: col-resize;
  z-index: 100;
}
.panel-icon {
  position: absolute;
  top: 50%;
  right: -16px;
  width: 16px;
  height: 86px;
  transform: translateY(-50%);
  z-index: 100;
  cursor: pointer;
}
.lab-right {
  margin-left: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.lab-box {
  position: relative;
  flex: 1;
  width: 100%;
  margin-top: 20px;
}
.iframe {
  width: 100%;
  height: 100%;
}
.pop {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 999999;
  opacity: 0;
}
</style>
