<template>
  <div class="mobile-sd">
    <van-form @submit="generate">
      <van-cell-group inset>
        <div>
          <van-field
              v-model="params.sampler"
              is-link
              readonly
              label="采样方法"
              placeholder="选择采样方法"
              @click="showSamplerPicker = true"
          />
          <van-popup v-model:show="showSamplerPicker" position="bottom" teleport="#app">
            <van-picker
                :columns="samplers"
                @cancel="showSamplerPicker = false"
                @confirm="samplerConfirm"
            />
          </van-popup>
        </div>

        <van-field label="图片尺寸">
          <template #input>
            <van-row gutter="20">
              <van-col span="12">
                <el-input v-model="params.width" size="small" placeholder="宽"/>
              </van-col>
              <van-col span="12">
                <el-input v-model="params.height" size="small" placeholder="高"/>
              </van-col>
            </van-row>
          </template>
        </van-field>

        <van-field v-model.number="params.steps" label="迭代步数"
                   placeholder="">
          <template #right-icon>
            <van-icon name="info-o"
                      @click="showInfo('值越大则代表细节越多，同时也意味着出图速度越慢，一般推荐20-30')"/>
          </template>
        </van-field>
        <van-field v-model.number="params.cfg_scale" label="引导系数" placeholder="">
          <template #right-icon>
            <van-icon name="info-o"
                      @click="showInfo('提示词引导系数，图像在多大程度上服从提示词，较低值会产生更有创意的结果')"/>
          </template>
        </van-field>
        <van-field v-model.number="params.seed" label="随机因子" placeholder="">
          <template #right-icon>
            <van-icon name="info-o"
                      @click="showInfo('随机数种子，相同的种子会得到相同的结果，设置为 -1 则每次随机生成种子')"/>
          </template>
        </van-field>

        <van-field label="高清修复">
          <template #input>
            <van-switch v-model="params.hd_fix"/>
          </template>
        </van-field>

        <div v-if="params.hd_fix">
          <div>
            <van-field
                v-model="params.hd_scale_alg"
                is-link
                readonly
                label="放大算法"
                placeholder="选择放大算法"
                @click="showUpscalePicker = true"
            />
            <van-popup v-model:show="showUpscalePicker" position="bottom" teleport="#app">
              <van-picker
                  :columns="upscaleAlgArr"
                  @cancel="showUpscalePicker = false"
                  @confirm="upscaleConfirm"
              />
            </van-popup>
          </div>

          <van-field v-model.number="params.hd_scale" label="放大倍数"/>
          <van-field v-model.number="params.hd_steps" label="迭代步数"/>

          <van-field label="重绘幅度">
            <template #input>
              <van-slider v-model.number="params.hd_redraw_rate" :max="1" :step="0.1"
                          @update:model-value="showToast('当前值：' + params.hd_redraw_rate)"/>
            </template>
            <template #right-icon>
              <van-icon name="info-o"
                        @click="showInfo('决定算法对图像内容的影响程度，较大的值将得到越有创意的图像')"/>
            </template>
          </van-field>
        </div>

        <van-field
            v-model="params.prompt"
            rows="3"
            autosize
            type="textarea"
            placeholder="请在此输入绘画提示词，系统会自动翻译中文提示词，高手请直接输入英文提示词"
        />

        <van-collapse v-model="activeColspan">
          <van-collapse-item title="反向提示词" name="neg_prompt">
            <van-field
                v-model="params.neg_prompt"
                rows="3"
                autosize
                type="textarea"
                placeholder="不想出现在图片上的元素(例如：树，建筑)"
            />
          </van-collapse-item>
        </van-collapse>

        <div class="text-line pt-6">
          <el-tag>绘图消耗{{ sdPower }}算力，当前算力：{{ power }}</el-tag>
        </div>

        <div class="text-line">
          <van-button round block type="primary" native-type="submit">
            立即生成
          </van-button>
        </div>
      </van-cell-group>
    </van-form>

    <h3>任务列表</h3>
    <div class="running-job-list">
      <van-empty v-if="runningJobs.length ===0"
                 image="https://fastly.jsdelivr.net/npm/@vant/assets/custom-empty-image.png"
                 image-size="80"
                 description="暂无记录"
      />
      <van-grid :gutter="10" :column-num="3" v-else>
        <van-grid-item v-for="item in runningJobs">
          <div v-if="item.progress > 0">
            <van-image :src="item['img_url']">
              <template v-slot:error>加载失败</template>
            </van-image>
            <div class="progress">
              <van-circle
                  v-model:current-rate="item.progress"
                  :rate="item.progress"
                  :speed="100"
                  :text="item.progress+'%'"
                  :stroke-width="60"
                  size="90px"
              />
            </div>
          </div>

          <div v-else class="task-in-queue">
            <span class="icon"><i class="iconfont icon-quick-start"></i></span>
            <span class="text">排队中</span>
          </div>

        </van-grid-item>
      </van-grid>
    </div>

    <h3>创作记录</h3>
    <div class="finish-job-list">
      <van-empty v-if="finishedJobs.length ===0"
                 image="https://fastly.jsdelivr.net/npm/@vant/assets/custom-empty-image.png"
                 image-size="80"
                 description="暂无记录"
      />

      <van-list v-else
                v-model:error="error"
                v-model:loading="loading"
                :finished="finished"
                error-text="请求失败，点击重新加载"
                finished-text="没有更多了"
                @load="onLoad"
      >
        <van-grid :gutter="10" :column-num="2">
          <van-grid-item v-for="item in finishedJobs">
            <div class="job-item">
              <van-image
                  :src="item['img_url']"
                  :class="item['can_opt'] ? '' : 'upscale'"
                  lazy-load
                  @click="imageView(item)"
                  fit="cover">
                <template v-slot:loading>
                  <van-loading type="spinner" size="20"/>
                </template>
              </van-image>

              <div class="remove">
                <el-button type="danger" :icon="Delete" @click="removeImage($event, item)" circle/>
                <el-button type="warning" v-if="item.publish" @click="publishImage($event,item, false)"
                           circle>
                  <i class="iconfont icon-cancel-share"></i>
                </el-button>
                <el-button type="success" v-else @click="publishImage($event, item, true)" circle>
                  <i class="iconfont icon-share-bold"></i>
                </el-button>
                <el-button type="primary" @click="showPrompt(item)" circle>
                  <i class="iconfont icon-prompt"></i>
                </el-button>
              </div>
            </div>
          </van-grid-item>
        </van-grid>
      </van-list>

    </div>
    <button style="display: none" class="copy-prompt-sd" :data-clipboard-text="prompt" id="copy-btn-sd">复制</button>
  </div>
</template>

<script setup>
import {onMounted, onUnmounted, ref} from "vue"
import {Delete} from "@element-plus/icons-vue";
import {httpGet, httpPost} from "@/utils/http";
import Clipboard from "clipboard";
import {checkSession} from "@/action/session";
import {useRouter} from "vue-router";
import {getSessionId} from "@/store/session";
import {
  showConfirmDialog,
  showDialog,
  showFailToast,
  showImagePreview,
  showNotify,
  showSuccessToast,
  showToast
} from "vant";
import {showLoginDialog} from "@/utils/libs";

const listBoxHeight = ref(window.innerHeight - 40)
const mjBoxHeight = ref(window.innerHeight - 150)
const item = ref({})
const isLogin = ref(false)
const activeColspan = ref([""])

window.onresize = () => {
  listBoxHeight.value = window.innerHeight - 40
  mjBoxHeight.value = window.innerHeight - 150
}
const samplers = ref([
  {text: "Euler a", value: "Euler a"},
  {text: "DPM++ 2S a Karras", value: "DPM++ 2S a Karras"},
  {text: "DPM++ 2M Karras", value: "DPM++ 2M Karras"},
  {text: "DPM++ 2M SDE Karras", value: "DPM++ 2M SDE Karras"},
  {text: "DPM++ 2M Karras", value: "DPM++ 2M Karras"},
  {text: "DPM++ 3M SDE Karras", value: "DPM++ 3M SDE Karras"},
])
const showSamplerPicker = ref(false)

const upscaleAlgArr = ref([
  {text: "Latent", value: "Latent"},
  {text: "ESRGAN_4x", value: "ESRGAN_4x"},
  {text: "ESRGAN 4x+", value: "ESRGAN 4x+"},
  {text: "SwinIR_4x", value: "SwinIR_4x"},
  {text: "LDSR", value: "LDSR"},
])
const showUpscalePicker = ref(false)

const params = ref({
  width: 1024,
  height: 1024,
  sampler: samplers.value[0].value,
  seed: -1,
  steps: 20,
  cfg_scale: 7,
  hd_fix: false,
  hd_redraw_rate: 0.7,
  hd_scale: 2,
  hd_scale_alg: upscaleAlgArr.value[0].value,
  hd_steps: 0,
  prompt: "",
  neg_prompt: "nsfw, paintings,low quality,easynegative,ng_deepnegative ,lowres,bad anatomy,bad hands,bad feet",
})

const runningJobs = ref([])
const finishedJobs = ref([])
const router = useRouter()
// 检查是否有画同款的参数
const _params = router.currentRoute.value.params["copyParams"]
if (_params) {
  params.value = JSON.parse(_params)
}
const power = ref(0)
const sdPower = ref(0) // 画一张 SD 图片消耗算力

const socket = ref(null)
const userId = ref(0)
const heartbeatHandle = ref(null)
const connect = () => {
  let host = process.env.VUE_APP_WS_HOST
  if (host === '') {
    if (location.protocol === 'https:') {
      host = 'wss://' + location.host;
    } else {
      host = 'ws://' + location.host;
    }
  }

  // 心跳函数
  const sendHeartbeat = () => {
    clearTimeout(heartbeatHandle.value)
    new Promise((resolve, reject) => {
      if (socket.value !== null) {
        socket.value.send(JSON.stringify({type: "heartbeat", content: "ping"}))
      }
      resolve("success")
    }).then(() => {
      heartbeatHandle.value = setTimeout(() => sendHeartbeat(), 5000)
    });
  }

  const _socket = new WebSocket(host + `/api/sd/client?user_id=${userId.value}`);
  _socket.addEventListener('open', () => {
    socket.value = _socket;

    // 发送心跳消息
    sendHeartbeat()
  });

  _socket.addEventListener('message', event => {
    if (event.data instanceof Blob) {
      fetchRunningJobs()
      finished.value = false
      page.value = 1
      fetchFinishJobs(page.value)
    }
  });

  _socket.addEventListener('close', () => {
    if (socket.value !== null) {
      connect()
    }
  });
}

const clipboard = ref(null)
const prompt = ref('')
onMounted(() => {
  initData()
  clipboard.value = new Clipboard(".copy-prompt-sd");
  clipboard.value.on('success', () => {
    showNotify({type: 'success', message: '复制成功', duration: 1000})
  })
  clipboard.value.on('error', () => {
    showNotify({type: 'danger', message: '复制失败', duration: 2000})
  })

  httpGet("/api/config/get?key=system").then(res => {
    sdPower.value = res.data["sd_power"]
  }).catch(e => {
    showNotify({type: "danger", message: "获取系统配置失败：" + e.message})
  })
})

onUnmounted(() => {
  clipboard.value.destroy()
  if (socket.value !== null) {
    socket.value.close()
    socket.value = null
  }
})


const initData = () => {
  checkSession().then(user => {
    power.value = user['power']
    userId.value = user.id
    isLogin.value = true
    fetchRunningJobs()
    fetchFinishJobs(1)
    connect()
  }).catch(() => {
    loading.value = false
  });
}

const fetchRunningJobs = () => {
  // 获取运行中的任务
  httpGet(`/api/sd/jobs?status=0`).then(res => {
    const jobs = res.data
    const _jobs = []
    for (let i = 0; i < jobs.length; i++) {
      if (jobs[i].progress === -1) {
        showNotify({
          message: `任务ID：${jobs[i]['task_id']} 原因：${jobs[i]['err_msg']}`,
          type: 'danger',
        })
        power.value += sdPower.value
        continue
      }
      _jobs.push(jobs[i])
    }
    runningJobs.value = _jobs
  }).catch(e => {
    showNotify({type: "danger", message: "获取任务失败：" + e.message})
  })
}

const loading = ref(false)
const finished = ref(false)
const error = ref(false)
const page = ref(0)
const pageSize = ref(10)
// 获取已完成的任务
const fetchFinishJobs = (page) => {
  loading.value = true
  httpGet(`/api/sd/jobs?status=1&page=${page}&page_size=${pageSize.value}`).then(res => {
    if (res.data.length < pageSize.value) {
      finished.value = true
    }
    if (page === 1) {
      finishedJobs.value = res.data
    } else {
      finishedJobs.value = finishedJobs.value.concat(res.data)
    }
    loading.value = false
  }).catch(e => {
    loading.value = false
    showNotify({type: "danger", message: "获取任务失败：" + e.message})
  })
}

const onLoad = () => {
  page.value += 1
  fetchFinishJobs(page.value)
}

// 创建绘图任务
const promptRef = ref(null)
const generate = () => {
  if (!isLogin.value) {
    return showLoginDialog(router)
  }

  if (params.value.prompt === '') {
    promptRef.value.focus()
    return showToast("请输入绘画提示词！")
  }

  if (!params.value.seed) {
    params.value.seed = -1
  }
  params.value.session_id = getSessionId()
  httpPost("/api/sd/image", params.value).then(() => {
    showSuccessToast("绘画任务推送成功，请耐心等待任务执行...")
    power.value -= sdPower.value
  }).catch(e => {
    showFailToast("任务推送失败：" + e.message)
  })
}

const showPrompt = (item) => {
  prompt.value = item.prompt
  showConfirmDialog({
    title: "绘画提示词",
    message: item.prompt,
    confirmButtonText: "复制",
    cancelButtonText: "关闭",
  }).then(() => {
    document.querySelector('#copy-btn-sd').click()
  }).catch(() => {
  });
}

const removeImage = (event, item) => {
  event.stopPropagation()
  showConfirmDialog({
    title: '标题',
    message:
        '此操作将会删除任务和图片，继续操作码?',
  }).then(() => {
    httpPost("/api/sd/remove", {id: item.id, img_url: item.img_url, user_id: userId.value}).then(() => {
      showSuccessToast("任务删除成功")
    }).catch(e => {
      showFailToast("任务删除失败：" + e.message)
    })
  }).catch(() => {
    showToast("您取消了操作")
  });
}

// 发布图片到作品墙
const publishImage = (event, item, action) => {
  event.stopPropagation()
  let text = "图片发布"
  if (action === false) {
    text = "取消发布"
  }
  httpPost("/api/sd/publish", {id: item.id, action: action}).then(() => {
    showSuccessToast(text + "成功")
    item.publish = action
  }).catch(e => {
    showFailToast(text + "失败：" + e.message)
  })
}

const imageView = (item) => {
  showImagePreview([item['img_url']]);
}


const samplerConfirm = (item) => {
  params.value.sampler = item.selectedOptions[0].text;
  showSamplerPicker.value = false
}

const upscaleConfirm = (item) => {
  params.value.hd_scale_alg = item.selectedOptions[0].text;
  showUpscalePicker.value = false
}

const showInfo = (message) => {
  showDialog({
    title: "参数说明",
    message: message,
  }).then(() => {
    // on close
  });
}
</script>

<style lang="stylus">
@import "@/assets/css/mobile/image-sd.styl"
</style>