<script lang="ts" setup>
import type { CropendResult, CropperModalProps, CropperType } from './typing';

import { ref } from 'vue';

import { useVbenModal } from '@vben/common-ui';
import { $t } from '@vben/locales';
import { dataURLtoBlob, isFunction } from '@vben/utils';

import {
  ElAvatar,
  ElButton,
  ElMessage,
  ElSpace,
  ElTooltip,
  ElUpload,
} from 'element-plus';

import CropperImage from './cropper.vue';

defineOptions({ name: 'CropperModal' });

const props = withDefaults(defineProps<CropperModalProps>(), {
  circled: true,
  size: 0,
  src: '',
  uploadApi: () => Promise.resolve(),
});

const emit = defineEmits(['uploadSuccess', 'uploadError', 'register']);

let filename = '';
const src = ref(props.src || '');
const previewSource = ref('');
const cropper = ref<CropperType>();
let scaleX = 1;
let scaleY = 1;

const prefixCls = 'cropper-am';
const [Modal, modalApi] = useVbenModal({
  onConfirm: handleOk,
  onOpenChange(isOpen) {
    if (isOpen) {
      // 打开时，进行 loading 加载。后续 CropperImage 组件加载完毕，会自动关闭 loading（通过 handleReady）
      modalLoading(true);
    } else {
      // 关闭时，清空右侧预览
      previewSource.value = '';
      modalLoading(false);
    }
  },
});

function modalLoading(loading: boolean) {
  modalApi.setState({ confirmLoading: loading, loading });
}

// Block upload
function handleBeforeUpload(file: File) {
  if (props.size > 0 && file.size > 1024 * 1024 * props.size) {
    emit('uploadError', { msg: $t('ui.cropper.imageTooBig') });
    return false;
  }
  const reader = new FileReader();
  reader.readAsDataURL(file);
  src.value = '';
  previewSource.value = '';
  reader.addEventListener('load', (e) => {
    src.value = (e.target?.result as string) ?? '';
    filename = file.name;
  });
  return false;
}

function handleCropend({ imgBase64 }: CropendResult) {
  previewSource.value = imgBase64;
}

function handleReady(cropperInstance: CropperType) {
  cropper.value = cropperInstance;
  // 画布加载完毕 关闭 loading
  modalLoading(false);
}

function handlerToolbar(event: string, arg?: number) {
  if (event === 'scaleX') {
    scaleX = arg = scaleX === -1 ? 1 : -1;
  }
  if (event === 'scaleY') {
    scaleY = arg = scaleY === -1 ? 1 : -1;
  }
  (cropper?.value as any)?.[event]?.(arg);
}

async function handleOk() {
  const uploadApi = props.uploadApi;
  if (uploadApi && isFunction(uploadApi)) {
    if (!previewSource.value) {
      ElMessage.warning('未选择图片');
      return;
    }
    const blob = dataURLtoBlob(previewSource.value);
    try {
      modalLoading(true);
      const url = await uploadApi({ file: blob, filename, name: 'file' });
      emit('uploadSuccess', { data: url, source: previewSource.value });
      await modalApi.close();
    } finally {
      modalLoading(false);
    }
  }
}
</script>

<template>
  <Modal
    v-bind="$attrs"
    :confirm-text="$t('ui.cropper.okText')"
    :fullscreen-button="false"
    :title="$t('ui.cropper.modalTitle')"
    class="w-[800px]"
  >
    <div :class="prefixCls">
      <!-- 左侧区域 -->
      <div :class="`${prefixCls}-left`" class="w-full">
        <!-- 裁剪器容器 -->
        <div :class="`${prefixCls}-cropper`">
          <CropperImage
            v-if="src"
            :circled="circled"
            :src="src"
            height="300px"
            @cropend="handleCropend"
            @ready="handleReady"
          />
        </div>

        <!-- 工具栏 -->
        <div :class="`${prefixCls}-toolbar`">
          <ElUpload
            :before-upload="handleBeforeUpload"
            :file-list="[]"
            accept="image/*"
          >
            <ElTooltip
              :content="$t('ui.cropper.selectImage')"
              placement="bottom"
            >
              <ElButton size="small" type="primary">
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span class="icon-[ant-design--upload-outlined]"></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
          </ElUpload>
          <ElSpace>
            <ElTooltip :content="$t('ui.cropper.btn_reset')" placement="bottom">
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('reset')"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span class="icon-[ant-design--reload-outlined]"></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
            <ElTooltip
              :content="$t('ui.cropper.btn_rotate_left')"
              placement="bottom"
            >
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('rotate', -45)"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span
                      class="icon-[ant-design--rotate-left-outlined]"
                    ></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
            <ElTooltip
              :content="$t('ui.cropper.btn_rotate_right')"
              placement="bottom"
            >
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('rotate', 45)"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span
                      class="icon-[ant-design--rotate-right-outlined]"
                    ></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
            <ElTooltip
              :content="$t('ui.cropper.btn_scale_x')"
              placement="bottom"
            >
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('scaleX')"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span class="icon-[vaadin--arrows-long-h]"></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
            <ElTooltip
              :content="$t('ui.cropper.btn_scale_y')"
              placement="bottom"
            >
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('scaleY')"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span class="icon-[vaadin--arrows-long-v]"></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
            <ElTooltip
              :content="$t('ui.cropper.btn_zoom_in')"
              placement="bottom"
            >
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('zoom', 0.1)"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span class="icon-[ant-design--zoom-in-outlined]"></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
            <ElTooltip
              :content="$t('ui.cropper.btn_zoom_out')"
              placement="bottom"
            >
              <ElButton
                :disabled="!src"
                size="small"
                type="primary"
                @click="handlerToolbar('zoom', -0.1)"
              >
                <template #icon>
                  <div class="flex items-center justify-center">
                    <span class="icon-[ant-design--zoom-out-outlined]"></span>
                  </div>
                </template>
              </ElButton>
            </ElTooltip>
          </ElSpace>
        </div>
      </div>

      <!-- 右侧区域 -->
      <div :class="`${prefixCls}-right`">
        <!-- 预览区域 -->
        <div :class="`${prefixCls}-preview`">
          <img
            v-if="previewSource"
            :alt="$t('ui.cropper.preview')"
            :src="previewSource"
          />
        </div>
        <!-- 头像组合预览 -->
        <template v-if="previewSource">
          <div :class="`${prefixCls}-group`">
            <ElAvatar :src="previewSource" size="large" />
            <ElAvatar :size="48" :src="previewSource" />
            <ElAvatar :size="64" :src="previewSource" />
            <ElAvatar :size="80" :src="previewSource" />
          </div>
        </template>
      </div>
    </div>
  </Modal>
</template>

<style lang="scss">
/* TODO @puhui999：要类似 web-antd/src/components/cropper/cropper-avatar.vue 减少 scss，通过 tindwind 么？ */
.cropper-am {
  display: flex;

  &-left,
  &-right {
    height: 340px;
  }

  &-left {
    width: 55%;
  }

  &-right {
    width: 45%;
  }

  &-cropper {
    height: 300px;
    background: #eee;
    background-image:
      linear-gradient(
        45deg,
        rgb(0 0 0 / 25%) 25%,
        transparent 0,
        transparent 75%,
        rgb(0 0 0 / 25%) 0
      ),
      linear-gradient(
        45deg,
        rgb(0 0 0 / 25%) 25%,
        transparent 0,
        transparent 75%,
        rgb(0 0 0 / 25%) 0
      );
    background-position:
      0 0,
      12px 12px;
    background-size: 24px 24px;
  }

  &-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
  }

  &-preview {
    width: 220px;
    height: 220px;
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid #eee;
    border-radius: 50%;

    img {
      width: 100%;
      height: 100%;
    }
  }

  &-group {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding-top: 8px;
    margin-top: 8px;
    border-top: 1px solid #eee;
  }
}
</style>
