<template>
	<div class="skill-page">
		<div class="page-header">
			<div class="header-left">
				<h2 class="page-title">Skill 技能管理</h2>
				<p class="page-desc">管理和配置 AI 技能模板</p>
			</div>
			<div class="header-right">
				<el-button type="primary" @click="handleCreate">
					<el-icon><Plus /></el-icon>
					创建技能
				</el-button>
			</div>
		</div>

		<!-- 搜索栏 -->
		<el-card shadow="hover" class="search-card">
			<div class="search-bar">
				<el-input v-model="searchParams.keyword" placeholder="搜索技能名称或描述" clearable class="search-input" @clear="handleSearch">
					<template #prefix>
						<el-icon><Search /></el-icon>
					</template>
				</el-input>
				<el-button type="primary" @click="handleSearch">
					<el-icon><Search /></el-icon>
					搜索
				</el-button>
			</div>
		</el-card>

		<!-- 技能表格 -->
		<el-card shadow="hover" class="table-card">
			<el-table :data="skillList" v-loading="loading" stripe style="width: 100%">
				<el-table-column type="index" label="序号" width="60" />
				<el-table-column prop="name" label="技能名称" min-width="150" show-overflow-tooltip />
				<el-table-column prop="description" label="技能描述" min-width="200" show-overflow-tooltip />
				<el-table-column prop="fileName" label="文件名" min-width="150" show-overflow-tooltip />
				<el-table-column prop="fileUrl" label="文件地址" min-width="200" show-overflow-tooltip>
					<template #default="{ row }">
						<el-link :href="row.fileUrl" target="_blank" type="primary" :underline="false">{{ row.fileUrl }}</el-link>
					</template>
				</el-table-column>
				<el-table-column prop="createdAt" label="创建时间" width="160" show-overflow-tooltip>
					<template #default="{ row }">{{ formatTime(row.createdAt) }}</template>
				</el-table-column>
				<el-table-column prop="updatedAt" label="更新时间" width="160" show-overflow-tooltip>
					<template #default="{ row }">{{ formatTime(row.updatedAt) }}</template>
				</el-table-column>
				<el-table-column label="操作" width="150" fixed="right">
					<template #default="{ row }">
						<el-button size="small" type="primary" link @click="handleEdit(row)">编辑</el-button>
						<el-button size="small" type="danger" link @click="handleDelete(row)">删除</el-button>
					</template>
				</el-table-column>
			</el-table>

			<!-- 分页 -->
			<div v-if="pagination.total > 0" class="pagination-wrap">
				<el-pagination
					v-model:current-page="pagination.pageNum"
					v-model:page-size="pagination.pageSize"
					:total="pagination.total"
					:page-sizes="[10, 20, 50, 100]"
					layout="total, sizes, prev, pager, next, jumper"
					@size-change="handleSizeChange"
					@current-change="handlePageChange"
				/>
			</div>
		</el-card>

		<!-- 创建/编辑对话框 -->
		<el-dialog v-model="dialogVisible" :title="dialogTitle" width="600px" :close-on-click-modal="false">
			<el-form :model="formData" :rules="formRules" ref="formRef" label-position="top">
				<el-form-item label="技能名称" prop="name">
					<el-input v-model="formData.name" placeholder="请输入技能名称" maxlength="50" show-word-limit />
				</el-form-item>
				<el-form-item label="技能描述" prop="description">
					<el-input v-model="formData.description" type="textarea" :rows="4" placeholder="请输入技能描述" maxlength="200" show-word-limit />
				</el-form-item>
				<el-form-item label="上传文件" prop="file">
					<el-upload
						ref="uploadRef"
						class="upload-area"
						drag
						:auto-upload="false"
						:limit="1"
						:on-change="handleFileChange"
						:on-exceed="handleExceed"
						:file-list="fileList"
						accept=".zip"
					>
						<el-icon class="el-icon--upload"><UploadFilled /></el-icon>
						<div class="el-upload__text">将 zip 文件拖到此处，或<em>点击上传</em></div>
						<template #tip>
							<div class="el-upload__tip">只支持 .zip 格式，且压缩包内必须包含 .md 文件，文件大小不超过 100MB</div>
						</template>
					</el-upload>
				</el-form-item>

				<!-- 文件信息预览 -->
				<div v-if="formData.fileName" class="file-preview">
					<div class="file-preview-header">
						<span class="file-preview-title">已上传文件</span>
						<el-tag type="success" size="small">{{ isEdit ? '当前文件' : '上传成功' }}</el-tag>
					</div>
					<div class="file-preview-info">
						<div class="file-info-item">
							<span class="file-info-label">文件名：</span>
							<span class="file-info-value">{{ formData.fileName }}</span>
						</div>
						<div class="file-info-item">
							<span class="file-info-label">文件地址：</span>
							<span class="file-info-value">{{ formData.fileUrl }}</span>
						</div>
					</div>
				</div>
			</el-form>
			<template #footer>
				<el-button @click="dialogVisible = false">取消</el-button>
				<el-button type="primary" @click="handleSubmit" :loading="submitting">确定</el-button>
			</template>
		</el-dialog>
	</div>
</template>

<script setup lang="ts">
import { ref, reactive, onMounted } from 'vue';
import { ElMessage, ElMessageBox, type FormInstance, type FormRules, type UploadInstance, type UploadProps, type UploadUserFile } from 'element-plus';
import { Plus, Search, UploadFilled } from '@element-plus/icons-vue';
import {
	getUserSkillList,
	createUserSkill,
	updateUserSkill,
	deleteUserSkill,
	getUserSkillDetail,
	type SkillItem,
	type CreateSkillParams,
} from '/@/api/settings/skill';
import { uploadFile as uploadFileToOss } from '/@/api/common/upload';

const searchParams = reactive({ keyword: '' });
const pagination = reactive({ pageNum: 1, pageSize: 10, total: 0 });
const skillList = ref<SkillItem[]>([]);
const loading = ref(false);
const dialogVisible = ref(false);
const dialogTitle = ref('创建技能');
const isEdit = ref(false);
const currentEditId = ref<number | null>(null);
const formRef = ref<FormInstance>();
const uploadRef = ref<UploadInstance>();
const submitting = ref(false);
const fileList = ref<UploadUserFile[]>([]);
const formData = reactive<CreateSkillParams>({ name: '', description: '', fileName: '', fileUrl: '' });
const formRules: FormRules = {
	name: [{ required: true, message: '请输入技能名称', trigger: 'blur' }],
};

const formatTime = (time: string) => (time ? time.replace('T', ' ').split('.')[0] : '');

// 验证 zip 文件中是否包含 .md 文件
const validateZipContainsMd = async (file: File): Promise<boolean> => {
	return new Promise((resolve) => {
		const reader = new FileReader();
		reader.onload = async (e) => {
			try {
				const arrayBuffer = e.target?.result as ArrayBuffer;
				// 使用 JSZip 库解析 zip 文件
				const JSZip = (await import('jszip')).default;
				const zip = await JSZip.loadAsync(arrayBuffer);
				
				// 检查是否有 .md 文件
				const hasMdFile = Object.keys(zip.files).some(filename => filename.toLowerCase().endsWith('.md'));
				resolve(hasMdFile);
			} catch (error) {
				console.error('解析 zip 文件失败:', error);
				resolve(false);
			}
		};
		reader.onerror = () => resolve(false);
		reader.readAsArrayBuffer(file);
	});
};

const handleFileChange: UploadProps['onChange'] = async (uploadFile) => {
	if (!uploadFile.raw) return;
	
	// 1. 验证文件格式必须是 zip
	const fileName = uploadFile.name.toLowerCase();
	if (!fileName.endsWith('.zip')) {
		ElMessage.warning('只支持上传 .zip 格式的文件');
		fileList.value = [];
		return;
	}
	
	// 2. 验证文件大小
	const maxSize = 100 * 1024 * 1024;
	if (uploadFile.raw.size > maxSize) {
		ElMessage.warning('文件大小不能超过 100MB');
		fileList.value = [];
		return;
	}
	
	// 3. 验证 zip 包内必须包含 .md 文件
	ElMessage.info('正在验证文件...');
	const hasMdFile = await validateZipContainsMd(uploadFile.raw);
	if (!hasMdFile) {
		ElMessage.warning('zip 压缩包内必须包含 .md 文件');
		fileList.value = [];
		return;
	}
	
	// 4. 上传文件
	try {
		ElMessage.info('正在上传文件到 OSS...');
		const uploadRes = await uploadFileToOss(uploadFile.raw);
		formData.fileName = uploadRes.data.fileName;
		formData.fileUrl = uploadRes.data.fileURL;
		fileList.value = [uploadFile];
		ElMessage.success('文件上传成功');
	} catch (error) {
		fileList.value = [];
		formData.fileName = '';
		formData.fileUrl = '';
	}
};

const handleExceed: UploadProps['onExceed'] = () => ElMessage.warning('只能上传一个文件');

const fetchSkillList = async () => {
	loading.value = true;
	try {
		const params = { pageNum: pagination.pageNum, pageSize: pagination.pageSize, keyword: searchParams.keyword || undefined };
		const res = await getUserSkillList(params);
		skillList.value = res.data?.list || [];
		pagination.total = res.data?.total || 0;
	} catch (error) {
		skillList.value = [];
		pagination.total = 0;
	} finally {
		loading.value = false;
	}
};

const handleSearch = () => {
	pagination.pageNum = 1;
	fetchSkillList();
};

const handlePageChange = (page: number) => {
	pagination.pageNum = page;
	fetchSkillList();
};

const handleSizeChange = (size: number) => {
	pagination.pageSize = size;
	pagination.pageNum = 1;
	fetchSkillList();
};

const handleCreate = () => {
	isEdit.value = false;
	currentEditId.value = null;
	dialogTitle.value = '创建技能';
	Object.assign(formData, { name: '', description: '', fileName: '', fileUrl: '' });
	fileList.value = [];
	dialogVisible.value = true;
};

const handleEdit = async (row: SkillItem) => {
	isEdit.value = true;
	currentEditId.value = row.id;
	dialogTitle.value = '编辑技能';
	
	try {
		// 获取详情
		const res = await getUserSkillDetail(row.id);
		const detail = res.data || row;
		
		Object.assign(formData, {
			name: detail.name,
			description: detail.description,
			fileName: detail.fileName,
			fileUrl: detail.fileUrl,
		});
		
		// 如果有文件，设置文件列表用于显示
		if (detail.fileName) {
			fileList.value = [
				{
					name: detail.fileName,
					url: detail.fileUrl,
				} as UploadUserFile,
			];
		} else {
			fileList.value = [];
		}
		
		dialogVisible.value = true;
	} catch (error) {
		ElMessage.error('获取技能详情失败');
	}
};

const handleSubmit = async () => {
	if (!formRef.value) return;
	await formRef.value.validate(async (valid) => {
		if (!valid) return;
		if (!formData.fileName || !formData.fileUrl) {
			ElMessage.warning('请先上传文件');
			return;
		}
		submitting.value = true;
		try {
			const submitData = {
				name: formData.name,
				description: formData.description,
				fileName: formData.fileName,
				fileUrl: formData.fileUrl,
			};

			if (isEdit.value && currentEditId.value) {
				// 编辑
				await updateUserSkill({ ...submitData, id: currentEditId.value });
				ElMessage.success('更新成功');
			} else {
				// 创建
				await createUserSkill(submitData);
				ElMessage.success('创建成功');
			}
			
			dialogVisible.value = false;
			fetchSkillList();
		} catch {
			// 接口错误由 request 全局提示后端 message
		} finally {
			submitting.value = false;
		}
	});
};

const handleDelete = async (row: SkillItem) => {
	try {
		await ElMessageBox.confirm(`确定要删除技能"${row.name}"吗？此操作不可恢复。`, '删除确认', {
			confirmButtonText: '确定删除',
			cancelButtonText: '取消',
			type: 'warning',
		});
		await deleteUserSkill(row.id);
		ElMessage.success('删除成功');
		fetchSkillList();
	} catch (error) {
		if (error !== 'cancel') {
			// 接口错误由 request 全局提示后端 message
		}
	}
};

onMounted(() => fetchSkillList());
</script>

<style scoped lang="scss">
.skill-page {
	padding: 20px;
	background: #f6f8fb;
	min-height: calc(100vh - 100px);
}

.page-header {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	margin-bottom: 20px;
}

.header-left {
	flex: 1;
}

.page-title {
	font-size: 24px;
	font-weight: 700;
	color: #1f2937;
	margin: 0 0 8px 0;
}

.page-desc {
	font-size: 14px;
	color: #64748b;
	margin: 0;
}

.header-right {
	display: flex;
	gap: 12px;
}

.search-card {
	margin-bottom: 20px;
}

.search-bar {
	display: flex;
	gap: 12px;
}

.search-input {
	flex: 1;
	max-width: 400px;
}

.table-card {
	:deep(.el-card__body) {
		padding: 20px;
	}
}

.pagination-wrap {
	display: flex;
	justify-content: flex-end;
	margin-top: 20px;
}

.upload-area {
	width: 100%;
	
	:deep(.el-upload-dragger) {
		width: 100%;
	}
}

.file-preview {
	margin-top: 16px;
	padding: 16px;
	background: #f0fdf4;
	border-radius: 8px;
	border: 1px solid #86efac;
}

.file-preview-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 12px;
}

.file-preview-title {
	font-size: 14px;
	font-weight: 600;
	color: #166534;
}

.file-preview-info {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.file-info-item {
	display: flex;
	align-items: flex-start;
	font-size: 13px;
}

.file-info-label {
	color: #15803d;
	margin-right: 8px;
	min-width: 80px;
	flex-shrink: 0;
}

.file-info-value {
	color: #166534;
	font-weight: 500;
	word-break: break-all;
}
</style>
