<template>
  <div ref="elRef" class="scan-image">
    <div
      class="img-body"
      :style="imageStyle"
      v-ele-move-directive.prevent.stop="{
        moveElement: onMoveImg,
        emitOriginLeftTop: true,
      }"
    >
      <img
        ref="imgRef"
        v-if="curPage"
        :src="getFileUrl(curPage.sheetUri)"
        alt="原图"
        @load="initImageSize"
      />
      <div class="img-recogs">
        <div
          v-for="(item, index) in recogBlocks"
          :key="index"
          class="recog-block"
          :style="item.fillAreaStyle"
          @click="onAreaClick(item)"
        >
          <div
            v-for="(option, oindex) in item.fillOptionStyles"
            :key="oindex"
            :style="option"
            class="recog-item"
          ></div>
        </div>
      </div>
    </div>
    <div class="img-guide">
      <div class="img-guide-icon is-left" @click="onPrev"><LeftOutlined /></div>
      <div class="img-guide-icon is-right" @click="onNext">
        <RightOutlined />
      </div>
    </div>
    <div class="img-actions">
      <ul>
        <li @click="onZoomIn"><ZoomInOutlined /></li>
        <li @click="onZoomOut"><ZoomOutOutlined /></li>
        <li @click="onZoomNormal">1:1</li>
        <li @click="onSetRecogStyle"><BgColorsOutlined /></li>
      </ul>
    </div>
    <import-btn
      upload-url="/api/admin/scan/answer/sheet/update"
      :format="['jpg', 'png', 'jpeg']"
      :upload-data="updateSheetData"
      @upload-success="updateSheetSuccess"
    >
      <a-tooltip placement="top">
        <template #title>
          <span>替换图片</span>
        </template>
        <a-button class="img-change">
          <template #icon><PictureFilled /></template>
        </a-button>
      </a-tooltip>
    </import-btn>
  </div>

  <!-- FillAreaSetDialog -->
  <FillAreaSetDialog ref="fillAreaSetDialogRef" @modified="parseRecogBlocks" />
  <!-- RecogEditDialog -->
  <RecogEditDialog
    v-if="curRecogBlock"
    ref="recogEditDialogRef"
    :recog-data="curRecogBlock"
    @confirm="onRecogEditConfirm"
  />
</template>

<script setup lang="ts">
import {
  ZoomInOutlined,
  ZoomOutOutlined,
  BgColorsOutlined,
  LeftOutlined,
  RightOutlined,
  PictureFilled,
} from "@ant-design/icons-vue";
import { message } from "ant-design-vue";
import {
  saveTemporaryImgViewConfig,
  getTemporaryImgViewConfig,
} from "@/utils/index";
import { computed, nextTick, ref, unref, watch } from "vue";
import { useRoute } from "vue-router";
import {
  objAssign,
  getFileUrl,
  getSliceFileUrl,
  getBoxImageSize,
} from "@/utils/tool";
import { vEleMoveDirective } from "@/directives/eleMove";
import {
  parseRecogData,
  parseDetailSize,
  RecognizeArea,
  RecogBlock,
} from "@/utils/recog/recog";
import { useUserStore, useDataCheckStore } from "@/store";
import { abc } from "@/constants/enumerate";

import FillAreaSetDialog from "./FillAreaSetDialog.vue";
import RecogEditDialog from "./RecogEditDialog.vue";
import ImportBtn from "@/components/ImportBtn/index.vue";
import { debounce } from "lodash-es";

defineOptions({
  name: "ScanImage",
});
const route = useRoute();
const emit = defineEmits(["next", "prev"]);

const userStore = useUserStore();
const dataCheckStore = useDataCheckStore();

const curPage = computed(() => dataCheckStore.curPage);
const updateSheetData = computed(() => {
  if (!curPage.value) return {};

  return {
    paperId: curPage.value.paperId,
    pageIndex: curPage.value.pageIndex + 1,
  };
});

const elRef = ref();
const imgRef = ref();
const imageSize = ref({
  width: 0,
  height: 0,
  top: 0,
  left: 0,
  scale: 1,
});
const saveImageSizeToSession = debounce(() => {
  saveTemporaryImgViewConfig(route.path, imageSize.value);
}, 500);
watch(
  imageSize,
  () => {
    saveImageSizeToSession();
  },
  { deep: true }
);

const imageStyle = computed(() => {
  return {
    width: `${imageSize.value.width}px`,
    height: `${imageSize.value.height}px`,
    top: `${imageSize.value.top}px`,
    left: `${imageSize.value.left}px`,
    transform: `scale(${imageSize.value.scale})`,
  };
});

function initImageSize() {
  const imgDom = imgRef.value as HTMLImageElement;
  const elDom = elRef.value as HTMLDivElement;

  const imgSize = getBoxImageSize({
    box: {
      width: elDom.clientWidth,
      height: elDom.clientHeight,
    },
    img: {
      width: imgDom.naturalWidth,
      height: imgDom.naturalHeight,
    },
    rotate: 0,
  });

  imageSize.value =
    getTemporaryImgViewConfig(route.path) ||
    objAssign(imageSize.value, imgSize);

  nextTick(() => {
    updateRecogList();
  });
}

function getNumberResult(
  result: Array<string | boolean>,
  sources: Array<string | boolean>
) {
  const nResult: number[] = [];
  result.forEach((item) => {
    const index = sources.indexOf(item);
    nResult[index] = 1;
  });
  return Array.from(nResult).map((item) => item || 0);
}

// recog data
const recogList = ref<RecognizeArea[]>([]);
function updateRecogList() {
  recogList.value = [] as RecognizeArea[];

  if (!dataCheckStore.curPage) return;
  const regdata = parseRecogData(dataCheckStore.curPage.recogData);
  if (!regdata) return;

  let index = 0;
  const ABC = abc.split("");
  regdata.question.forEach((gGroup) => {
    gGroup.fill_result.forEach((qRecog) => {
      const result = dataCheckStore.curPage?.question?.result[index] || "";
      qRecog.index = ++index;

      const questionResult = result ? result.split("") : [];
      const recogItem = parseDetailSize(
        qRecog,
        "question",
        qRecog.index,
        getNumberResult(questionResult, ABC)
      );
      recogList.value.push(recogItem);
    });
  });

  parseRecogBlocks();
}
// recogBlocks
const recogBlocks = ref<RecogBlock[]>([]);
const curRecogBlock = ref<RecogBlock | null>(null);
function parseRecogBlocks() {
  const imgDom = imgRef.value as HTMLImageElement;
  const rate = imgDom.clientWidth / imgDom.naturalWidth;

  const { unfillColor, unfillShow, fillColor, fillShow, borderWidth } =
    userStore.recogFillSet;
  const curBorderWidth = Math.max(1, borderWidth * rate);

  recogBlocks.value = unref(recogList.value).map((item) => {
    const fillAreaStyle = {
      position: "absolute",
      left: `${item.fillArea.x * rate}px`,
      top: `${item.fillArea.y * rate}px`,
      width: `${item.fillArea.w * rate}px`,
      height: `${item.fillArea.h * rate}px`,
      zIndex: 9,
    };
    const fillOptionStyles = item.optionSizes
      .map((op) => {
        const opStyle = {
          position: "absolute",
          left: `${op.x * rate}px`,
          top: `${op.y * rate}px`,
          width: `${op.w * rate}px`,
          height: `${op.h * rate}px`,
          zIndex: 9,
          border: "",
        };

        if (op.filled && fillShow) {
          opStyle.border = `${curBorderWidth}px solid ${fillColor}`;
          return opStyle;
        }

        if (!op.filled && unfillShow) {
          opStyle.border = `${curBorderWidth}px solid ${unfillColor}`;
          return opStyle;
        }

        return opStyle;
      })
      .filter((item) => item);

    const nitem: RecogBlock = {
      ...item,
      fillAreaStyle,
      fillOptionStyles,
      areaImg: "",
    };

    return nitem;
  });
}

// area click
const recogEditDialogRef = ref();
async function onAreaClick(data: RecogBlock) {
  if (!curPage.value) return;
  curRecogBlock.value = data;
  // 基于 fillArea 四周扩展一个 fillSize 尺寸
  const area = {
    x: data.fillArea.x - data.fillSize.w,
    y: data.fillArea.y - data.fillSize.h,
    w: data.fillArea.w + data.fillSize.w * 2,
    h: data.fillArea.h + data.fillSize.h * 2,
  };
  curRecogBlock.value.areaImg = await getSliceFileUrl(
    curPage.value.sheetUri,
    area
  );
  nextTick(() => {
    recogEditDialogRef.value?.open();
  });
}

async function onRecogEditConfirm(result: string[]) {
  if (!curRecogBlock.value || !dataCheckStore.curPage) return;

  const data = curRecogBlock.value;

  if (data.type === "question") {
    const index = data.index - 1;
    dataCheckStore.curPage.question.result.splice(index, 1, result.join(""));

    await dataCheckStore.updateField({
      field: "QUESTION",
      value: JSON.stringify(dataCheckStore.curPage.question),
    });
    curRecogBlock.value.result = result;
  }
}

// img action
function onZoomIn() {
  const scale = imageSize.value.scale;
  if (scale >= 2) return;

  imageSize.value.scale = Math.min(2, scale * 1.2);
}
function onZoomOut() {
  const scale = imageSize.value.scale;
  if (scale <= 1) return;

  imageSize.value.scale = Math.max(1, scale * 0.8);
}
function onZoomNormal() {
  initImageSize();
  imageSize.value.scale = 1;
}

interface PosSize {
  left: number;
  top: number;
}
function onMoveImg({ left, top }: PosSize) {
  imageSize.value.left = left;
  imageSize.value.top = top;
}

function onPrev() {
  emit("prev");
}
function onNext() {
  emit("next");
}

// change image
function updateSheetSuccess(data: { uri: string }) {
  if (!curPage.value) return;
  dataCheckStore.modifySheetUri({
    paperIndex: curPage.value.paperIndex,
    pageIndex: curPage.value.pageIndex,
    uri: data.uri,
  });
  message.success("上传成功！");
}

// set recog style
const fillAreaSetDialogRef = ref();
function onSetRecogStyle() {
  fillAreaSetDialogRef.value?.open();
}

// 监听question.result，同步修改客观题的识别结果
watch(
  () => dataCheckStore.curPage?.question?.result,
  (val) => {
    if (!val) return;
    updateRecogList();
  },
  {
    deep: true,
  }
);
</script>

<style lang="less" scoped>
.scan-image {
  overflow: hidden;
  position: relative;
  height: 100%;

  .img-guide {
    &-icon {
      position: absolute;
      top: 50%;
      width: 28px;
      height: 32px;
      margin-top: -16px;
      background: #ffffff;
      border-radius: 6px;
      border: 1px solid @border-color1;
      line-height: 32px;
      text-align: center;
      z-index: 9;
      cursor: pointer;

      &:hover {
        background-color: #e8f3ff;
        border-color: @brand-color;
        color: @brand-color;
      }

      &.is-left {
        left: 12px;
      }
      &.is-right {
        right: 12px;
      }
    }
  }

  .img-change {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    line-height: 32px;
    background: #e8f3ff;
    padding: 0;
    border-radius: 6px;
    border: 1px solid #bedaff;
    color: #4080ff;
    text-align: center;
    z-index: 9;

    &:hover {
      opacity: 0.8;
    }
  }

  .img-actions {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(89, 89, 89, 0.6);
    border-radius: 8px;
    padding: 4px 8px;
    z-index: 9;

    li {
      display: inline-block;
      vertical-align: middle;
      width: 26px;
      height: 26px;
      border-radius: 6px;
      line-height: 26px;
      text-align: center;
      color: #fff;
      font-size: 16px;
      cursor: pointer;
      &:not(:last-child) {
        margin-right: 4px;
      }

      &:hover {
        background: rgba(89, 89, 89, 0.6);
      }
    }
  }

  .img-body {
    position: absolute;
    z-index: 2;
  }
}
</style>