<!-- 单图图片上传组件, 推荐使用 ImagePlus 组件，后续将删除本组件-->
<template>
	<div class="upload-box">
		<el-upload
			action="#"
			:id="uuid"
			:class="['upload', self_disabled ? 'disabled' : '', drag ? 'no-border' : '']"
			list-type="picture-card"
			:disabled="self_disabled"
			:show-file-list="false"
			:http-request="handleHttpUpload"
			:before-upload="beforeUpload"
			:on-success="uploadSuccess"
			:on-error="uploadError"
			:drag="drag"
			:accept="acceptType"
		>
			<template v-if="imageUrl || modelValue">
				<!-- 如果返回的是OSS 地址则不需要增加 baseURL -->
				<img
					:src="(imageUrl || modelValue || '').includes('http') ? imageUrl || modelValue : baseURL + (imageUrl || modelValue)"
					class="upload-image"
				/>
				<div class="upload-handle" @click.stop>
					<div class="handle-icon" @click="editImg" v-if="!self_disabled">
						<el-icon :size="props.iconSize"><Edit /></el-icon>
						<span v-if="!props.iconSize">{{ $t('common.editBtn') }}</span>
					</div>
					<div class="handle-icon" @click="imgViewVisible = true">
						<el-icon :size="props.iconSize"><ZoomIn /></el-icon>
						<span v-if="!props.iconSize">{{ $t('common.viewBtn') }}</span>
					</div>
					<div class="handle-icon" @click="deleteImg" v-if="!self_disabled">
						<el-icon :size="props.iconSize"><Delete /></el-icon>
						<span v-if="!props.iconSize">{{ $t('common.delBtn') }}</span>
					</div>
				</div>
			</template>
			<template v-else>
				<div class="upload-empty">
					<slot name="empty">
						<el-icon><Plus /></el-icon>
						<!-- <span>请上传图片</span> -->
					</slot>
				</div>
			</template>
		</el-upload>
		<div class="el-upload__tip">
			<slot name="tip"></slot>
		</div>
		<el-image-viewer
			:teleported="true"
			v-if="imgViewVisible"
			@close="imgViewVisible = false"
			:url-list="[_imageUrl.includes('http') ? _imageUrl : baseURL + _imageUrl]"
		/>
	</div>
</template>

<script setup lang="ts" name="UploadImg">
import { ref, computed, inject, watch } from 'vue';
import { ElNotification, formContextKey, formItemContextKey } from 'element-plus';
import type { UploadProps, UploadRequestOptions } from 'element-plus';
import { generateUUID } from '/@/utils/other';
import request from '/@/utils/request';

// 定义图片MIME类型
type ImageMimeType = 'image/jpeg' | 'image/png' | 'image/gif' | 'image/webp' | 'image/svg+xml' | string;

interface UploadFileProps {
	imageUrl?: string; // 图片地址 ==> 必传
	modelValue?: string; // 图片地址 (v-model)
	uploadFileUrl?: string; // 上传图片的 api 方法，一般项目上传都是同一个 api 方法，在组件里直接引入即可 ==> 非必传
	drag?: boolean; // 是否支持拖拽上传 ==> 非必传（默认为 true）
	disabled?: boolean; // 是否禁用上传组件 ==> 非必传（默认为 false）
	fileSize?: number; // 图片大小限制 ==> 非必传（默认为 5M）
	fileType?: ImageMimeType[]; // 图片类型限制 ==> 非必传（默认为 ["image/jpeg", "image/png", "image/gif"]）
	height?: string; // 组件高度 ==> 非必传（默认为 150px）
	width?: string; // 组件宽度 ==> 非必传（默认为 150px）
	borderRadius?: string; // 组件边框圆角 ==> 非必传（默认为 8px）
	iconSize?: number;
	dir?: string; // 文件目录
}

// 接受父组件参数
const props = withDefaults(defineProps<UploadFileProps>(), {
	imageUrl: '',
	modelValue: '',
	uploadFileUrl: '/admin/sys-file/upload',
	drag: true,
	disabled: false,
	fileSize: 5,
	fileType: () => ['image/jpeg', 'image/png', 'image/gif'],
	height: '150px',
	width: '150px',
	borderRadius: '8px',
	dir: '',
});

// 计算accept属性值
const acceptType = computed(() => {
	return props.fileType.join(',');
});

// 生成组件唯一id
const uuid = ref('id-' + generateUUID());

// 查看图片
const imgViewVisible = ref(false);
// 获取 el-form 组件上下文
const formContext = inject(formContextKey, void 0);
// 获取 el-form-item 组件上下文
const formItemContext = inject(formItemContextKey, void 0);
// 本地 image url
const _imageUrl = ref(props.imageUrl || props.modelValue);

// 监听 props 变化
watch(
	() => props.imageUrl,
	(val) => {
		if (val !== _imageUrl.value) {
			_imageUrl.value = val || '';
		}
	}
);

watch(
	() => props.modelValue,
	(val) => {
		if (val !== _imageUrl.value) {
			_imageUrl.value = val || '';
		}
	}
);

// 判断是否禁用上传和删除
const self_disabled = computed(() => {
	return props.disabled || formContext?.disabled;
});

/**
 * @description 图片上传
 * @param options upload 所有配置项
 * */
interface UploadEmits {
	(e: 'update:imageUrl', value: string): void;
	(e: 'update:modelValue', value: string): void;
}
const emit = defineEmits<UploadEmits>();
const handleHttpUpload = async (options: UploadRequestOptions) => {
	let formData = new FormData();
	formData.append('file', options.file);
	formData.append('dir', props.dir);
	try {
		const { data } = await request({
			url: props.uploadFileUrl,
			method: 'post',
			headers: {
				'Content-Type': 'multipart/form-data',
				'Enc-Flag': 'false',
			},
			data: formData,
		});
		emit('update:imageUrl', data.url);
		emit('update:modelValue', data.url);
		_imageUrl.value = data.url;
		// 调用 el-form 内部的校验方法（可自动校验）
		formItemContext?.prop && formContext?.validateField([formItemContext.prop as string]);
	} catch (error) {
		options.onError(error as any);
	}
};

/**
 * @description 删除图片
 * */
const deleteImg = () => {
	emit('update:imageUrl', '');
	emit('update:modelValue', '');
	_imageUrl.value = '';
};

/**
 * @description 编辑图片
 * */
const editImg = () => {
	const dom = document.querySelector(`#${uuid.value} .el-upload__input`);
	dom && dom.dispatchEvent(new MouseEvent('click'));
};

/**
 * @description 文件上传之前判断
 * @param rawFile 选择的文件
 * */
const beforeUpload: UploadProps['beforeUpload'] = (rawFile) => {
	const imgSize = rawFile.size / 1024 / 1024 < props.fileSize;
	const imgType = props.fileType.includes(rawFile.type as ImageMimeType);
	if (!imgType)
		ElNotification({
			title: '温馨提示',
			message: '上传图片不符合所需的格式！',
			type: 'warning',
		});
	if (!imgSize)
		setTimeout(() => {
			ElNotification({
				title: '温馨提示',
				message: `上传图片大小不能超过 ${props.fileSize}M！`,
				type: 'warning',
			});
		}, 0);
	return imgType && imgSize;
};

/**
 * @description 图片上传成功
 * */
const uploadSuccess = () => {
	ElNotification({
		title: '温馨提示',
		message: '图片上传成功！',
		type: 'success',
	});
};

/**
 * @description 图片上传错误
 * */
const uploadError = () => {
	ElNotification({
		title: '温馨提示',
		message: '图片上传失败，请您重新上传！',
		type: 'error',
	});
};
</script>
<style scoped lang="scss">
.is-error {
	.upload {
		:deep(.el-upload),
		:deep(.el-upload-dragger) {
			border: 1px dashed var(--el-color-danger) !important;
			&:hover {
				border-color: var(--el-color-primary) !important;
			}
		}
	}
}
:deep(.disabled) {
	.el-upload,
	.el-upload-dragger {
		cursor: not-allowed !important;
		background: var(--el-disabled-bg-color);
		border: 1px dashed var(--el-border-color-darker) !important;
		&:hover {
			border: 1px dashed var(--el-border-color-darker) !important;
		}
	}
}
.upload-box {
	.no-border {
		:deep(.el-upload) {
			border: none !important;
		}
	}
	:deep(.upload) {
		.el-upload {
			position: relative;
			display: flex;
			align-items: center;
			justify-content: center;
			width: v-bind(width);
			height: v-bind(height);
			overflow: hidden;
			border: 1px dashed var(--el-border-color-darker);
			border-radius: v-bind(borderRadius);
			transition: var(--el-transition-duration-fast);
			&:hover {
				border-color: var(--el-color-primary);
				.upload-handle {
					opacity: 1;
				}
			}
			.el-upload-dragger {
				display: flex;
				align-items: center;
				justify-content: center;
				width: 100%;
				height: 100%;
				padding: 0;
				overflow: hidden;
				background-color: transparent;
				border: 1px dashed var(--el-border-color-darker);
				border-radius: v-bind(borderRadius);
				&:hover {
					border: 1px dashed var(--el-color-primary);
				}
			}
			.el-upload-dragger.is-dragover {
				background-color: var(--el-color-primary-light-9);
				border: 2px dashed var(--el-color-primary) !important;
			}
			.upload-image {
				width: 100%;
				height: 100%;
				object-fit: contain;
			}
			.upload-empty {
				position: relative;
				display: flex;
				flex-direction: column;
				align-items: center;
				justify-content: center;
				font-size: 12px;
				line-height: 30px;
				color: var(--el-color-info);
				.el-icon {
					font-size: 28px;
					color: var(--el-text-color-secondary);
				}
			}
			.upload-handle {
				position: absolute;
				top: 0;
				right: 0;
				box-sizing: border-box;
				display: flex;
				align-items: center;
				justify-content: center;
				width: 100%;
				height: 100%;
				cursor: pointer;
				background: rgb(0 0 0 / 60%);
				opacity: 0;
				transition: var(--el-transition-duration-fast);
				.handle-icon {
					display: flex;
					flex-direction: column;
					align-items: center;
					justify-content: center;
					padding: 0 6%;
					color: aliceblue;
					.el-icon {
						margin-bottom: 40%;
						font-size: 130%;
						line-height: 130%;
					}
					span {
						font-size: 85%;
						line-height: 85%;
					}
				}
			}
		}
	}
	.el-upload__tip {
		line-height: 18px;
		text-align: center;
	}
}
</style>
