<template>
	<div class="p-6 flex justify-center">
		<div class="w-full mx-auto min-h-screen">
			<!-- 顶部筛选区 -->
			<div class="bg-white rounded-lg shadow-sm p-6 mb-6 h-25 flex items-center">
				<!-- 课程ID输入 -->
				<div class="flex-1 mr-4">
					<label class="block text-sm font-medium text-gray-700 mb-1">课程ID</label>
					<a-select class="w-full" v-model:value="filters.courseId" placeholder="请选择课程" allow-clear>
						<a-select-option v-for="item in courseinfoAllListOptions" :key="item.courseId" :value="item.courseId">
							{{ item.courseName }}
						</a-select-option>
					</a-select>
				</div>

				<!-- 日期范围选择 -->
<!--				<div class="flex-1 mr-4">-->
<!--					<label class="block text-sm font-medium text-gray-700 mb-1">开始时间</label>-->
<!--					<a-date-picker v-model:value="startDate" class="w-full" placeholder="开始时间" />-->
<!--				</div>-->

<!--				<div class="flex-1 mr-4">-->
<!--					<label class="block text-sm font-medium text-gray-700 mb-1">结束时间</label>-->
<!--					<a-date-picker v-model:value="endDate" class="w-full" placeholder="结束时间" />-->
<!--				</div>-->

				<!-- 操作按钮 -->
				<div class="flex space-x-2 ml-4 mt-6">
					<a-button @click="refreshData" :loading="loading">
						<template #icon>
							<ReloadOutlined />
						</template>
						刷新
					</a-button>
				</div>
			</div>

			<!-- 核心数据看板 -->
			<div class="mb-6">
				<!-- 数据卡片 -->
				<div class="grid grid-cols-4 gap-6 mb-6">
					<div
						v-for="(card, index) in statsCards"
						:key="index"
						class="card-header bg-white p-5 rounded-lg shadow-sm"
						:class="card.borderClass"
					>
						<div class="flex justify-between items-start">
							<div>
								<div class="text-gray-500 text-sm">{{ card.title }}</div>
								<div class="font-size-30 font-bold text-gray-800 mt-2">{{ card.value.toLocaleString() }}</div>
							</div>
							<div :class="card.iconBgClass" class="p-2 rounded-full">
								<component :is="card.icon" :class="card.iconClass" class="text-xl" />
							</div>
						</div>
					</div>
				</div>

				<!-- 图表区 -->
				<div class="grid grid-cols-2 gap-6">
					<!-- 折线图 -->
					<div class="chart-container p-4 bg-white border border-gray-200 rounded">
						<h3 class="font-bold text-gray-800 mb-4">访问人数趋势</h3>
						<div ref="lineChartRef" class="h-48"></div>
					</div>

					<!-- 柱状图 -->
					<div class="chart-container p-4 bg-white border border-gray-200 rounded">
						<h3 class="font-bold text-gray-800 mb-4">练习平均提交数</h3>
						<div ref="barChartRef" class="h-48"></div>
					</div>
				</div>
			</div>

			<!-- 明细表格区 -->
			<div class="bg-white rounded-lg shadow-sm p-6">
				<div class="flex justify-between items-center mb-4">
					<h2 class="text-xl font-bold text-gray-800">学习明细数据</h2>
<!--					<div class="text-sm text-gray-500">（{{ formatDateRange() }}）注：从查询条件时间范围落下来的</div>-->
				</div>

				<a-table
					:columns="tableColumns"
					:data-source="tableData"
					:pagination="false"
					:loading="loading"
					size="small"
				></a-table>
			</div>
		</div>
	</div>
</template>

<script setup>
	import { ref, reactive, onMounted, onUnmounted, nextTick, watch } from 'vue'
	import { ReloadOutlined, UserOutlined, EyeOutlined, FileTextOutlined, MessageOutlined } from '@ant-design/icons-vue'
	import * as echarts from 'echarts'
	import dayjs from 'dayjs'
	import { overviewLearningProgressApi } from '@/api/statisticalAnalysis/overviewLearningProgress'
	import { courseinfoAllList } from '@/api/semester/index.js'

	import { message } from 'ant-design-vue'

	// 响应式数据
	const loading = ref(false)
	const lineChartRef = ref(null)
	const barChartRef = ref(null)
	const courseinfoAllListOptions = ref([])
	let lineChart = null
	let barChart = null

	// 日期选择器
	// const startDate = ref(dayjs('2025-08-04'))
	// const endDate = ref(dayjs('2025-08-10'))
	const startDate = ref(undefined)
	const endDate = ref(undefined)

	// 筛选条件
	const filters = reactive({
		courseId: '',
		startTime: undefined,
		endTime: undefined
	})

	// 统计卡片数据
	const statsCards = reactive([
		{
			title: '开课人数',
			value: 0,
			key: 'courseOpenStuNum',
			icon: UserOutlined,
			borderClass: 'border-l-4 !border-blue-500',
			iconBgClass: 'bg-blue-100',
			iconClass: 'text-blue-600'
		},
		{
			title: '课程访问次数',
			value: 0,
			key: 'courseViewNum',
			icon: EyeOutlined,
			borderClass: 'border-l-4 !border-green-500',
			iconBgClass: 'bg-green-100',
			iconClass: 'text-green-600'
		},
		{
			title: '提交数（作业、测验）',
			value: 0,
			key: 'paperSubmitNum',
			icon: FileTextOutlined,
			borderClass: 'border-l-4 !border-orange-500',
			iconBgClass: 'bg-orange-100',
			iconClass: 'text-orange-500'
		},
		{
			title: '互动数（发帖/回帖）',
			value: 0,
			key: 'interactionNum',
			icon: MessageOutlined,
			borderClass: 'border-l-4 !border-blue-500',
			iconBgClass: 'bg-blue-100',
			iconClass: 'text-blue-600'
		}
	])

	const tableColumns = [
		{
			title: '课程名称',
			dataIndex: 'courseName',
			key: 'courseName'
		},
		{
			title: '开课人数',
			dataIndex: 'openStuNum',
			key: 'openStuNum'
		},
		{
			title: '课程访问量',
			dataIndex: 'viewCount',
			key: 'viewCount'
		},
		{
			title: '讲义访问量',
			dataIndex: 'teachMaterialsNum',
			key: 'teachMaterialsNum'
		},
		{
			title: '练习提交量',
			dataIndex: 'paperSubmitNum',
			key: 'paperSubmitNum'
		}
	]

	// 图表数据
	const chartData = reactive({
		visitTrend: [],
		submissionTrend: []
	})

	// 表格数据
	const tableData = ref([])

	// 初始化折线图
	const initLineChart = () => {
		if (!lineChartRef.value) return

		lineChart = echarts.init(lineChartRef.value)
		updateLineChart()
	}

	// 更新折线图数据
	const updateLineChart = () => {
		if (!lineChart) return

		const option = {
			grid: { top: 30, right: 20, bottom: 20, left: 40 },
			tooltip: { trigger: 'axis' },
			xAxis: {
				type: 'category',
				data: chartData.visitTrend.map((item) => item.month)
			},
			yAxis: { type: 'value', name: '访问人数' },
			series: [
				{
					name: '访问人数',
					type: 'line',
					smooth: true,
					symbol: 'circle',
					symbolSize: 8,
					data: chartData.visitTrend.map((item) => item.viewTendencyNum),
					lineStyle: { color: '#3A7BFF', width: 3 },
					itemStyle: { color: '#3A7BFF' },
					areaStyle: {
						color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
							{ offset: 0, color: 'rgba(58, 123, 255, 0.3)' },
							{ offset: 1, color: 'rgba(58, 123, 255, 0.05)' }
						])
					}
				}
			]
		}
		lineChart.setOption(option)
	}

	// 初始化柱状图
	const initBarChart = () => {
		if (!barChartRef.value) return

		barChart = echarts.init(barChartRef.value)
		updateBarChart()
	}

	// 更新柱状图数据
	const updateBarChart = () => {
		if (!barChart) return

		const option = {
			grid: { top: 30, right: 20, bottom: 20, left: 40 },
			tooltip: { trigger: 'axis', axisPointer: { type: 'shadow' } },
			xAxis: {
				type: 'category',
				data: chartData.submissionTrend.map((item) => item.month)
			},
			yAxis: { type: 'value', name: '提交数' },
			series: [
				{
					name: '练习提交数',
					type: 'bar',
					barWidth: 28,
					data: chartData.submissionTrend.map((item) => item.SubmeitTendency),
					itemStyle: {
						color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
							{ offset: 0, color: '#5B8EFF' },
							{ offset: 1, color: '#3A7BFF' }
						]),
						borderRadius: [4, 4, 0, 0]
					}
				}
			]
		}
		barChart.setOption(option)
	}

	// 格式化日期范围显示
	const formatDateRange = () => {
		const start = startDate.value ? startDate.value.format('YYYY/MM/DD') : filters.startTime
		const end = endDate.value ? endDate.value.format('YYYY/MM/DD') : filters.endTime
		return `${start}至${end}`
	}

	// 获取统计概览数据
	const fetchOverviewStats = async () => {
		try {
			const params = {
				courseId: filters.courseId,
				startTime: startDate.value ? startDate.value.format('YYYY-MM-DD') : filters.startTime,
				endTime: endDate.value ? endDate.value.format('YYYY-MM-DD') : filters.endTime
			}
			const data = await overviewLearningProgressApi.getTopFundamentalDetail(params)
			// 更新统计卡片数据
			statsCards.forEach((card) => {
				card.value = data[card.key] || 0
			})
		} catch (error) {
			console.error('获取统计数据失败:', error)
			message.error('获取统计数据失败')
		}
	}

	// 获取趋势数据
	const fetchTrendData = async () => {
		try {
			const params = {
				courseId: filters.courseId,
				startTime: startDate.value ? startDate.value.format('YYYY-MM-DD') : filters.startTime,
				endTime: endDate.value ? endDate.value.format('YYYY-MM-DD') : filters.endTime
			}

			// 并行获取访问趋势和提交趋势数据
			const [visitData, submitData] = await Promise.all([
				overviewLearningProgressApi.getViewTendency(params),
				overviewLearningProgressApi.getPaperSubmitTendency(params)
			])

			// 更新图表数据
			chartData.visitTrend = visitData || []
			chartData.submissionTrend = submitData || []

			// 更新图表
			updateLineChart()
			updateBarChart()
		} catch (error) {
			console.error('获取趋势数据失败:', error)
			message.error('获取趋势数据失败')
		}
	}

	// 获取学习明细数据
	const fetchStudyDetail = async () => {
		try {
			const params = {
				courseId: filters.courseId,
				startTime: startDate.value ? startDate.value.format('YYYY-MM-DD') : filters.startTime,
				endTime: endDate.value ? endDate.value.format('YYYY-MM-DD') : filters.endTime
			}
			const data = await overviewLearningProgressApi.getStudyDetail(params)
			// 更新表格数据
			tableData.value = (data.records || []).map((item, index) => ({
				...item,
				key: item.courseId || index + 1
			}))
		} catch (error) {
			console.error('获取学习明细数据失败:', error)
			message.error('获取学习明细数据失败')
		}
	}

	// 刷新所有数据
	const refreshData = async () => {
		loading.value = true
		try {
			// 更新筛选条件
			filters.startTime = startDate.value ? startDate.value.format('YYYY-MM-DD') : filters.startTime
			filters.endTime = endDate.value ? endDate.value.format('YYYY-MM-DD') : filters.endTime

			await Promise.all([fetchOverviewStats(), fetchTrendData(), fetchStudyDetail()])
		} catch (error) {
			console.error('刷新数据失败:', error)
		} finally {
			loading.value = false
		}
	}

	// 窗口大小变化处理
	const handleResize = () => {
		if (lineChart) lineChart.resize()
		if (barChart) barChart.resize()
	}

	const getCourseinfoAllList = () => {
		courseinfoAllList()
			.then((res) => {
				courseinfoAllListOptions.value = res.data
			})
			.catch((err) => {
				console.log(err)
			})
	}

	// 监听筛选条件变化
	watch(
		() => [filters.courseId, startDate.value, endDate.value],
		() => {
			refreshData()
		},
		{ deep: true }
	)

	// 生命周期
	onMounted(async () => {
		await nextTick()
		initLineChart()
		initBarChart()
		window.addEventListener('resize', handleResize)

		// 初始化数据
		await refreshData()
		getCourseinfoAllList()
	})

	onUnmounted(() => {
		if (lineChart) {
			lineChart.dispose()
			lineChart = null
		}
		if (barChart) {
			barChart.dispose()
			barChart = null
		}
		window.removeEventListener('resize', handleResize)
	})
</script>

<style scoped>
	.card-header {
		border-left: 4px solid;
	}

	.chart-container {
		background-color: white;
		border: 1px solid #e4e7ed;
		border-radius: 4px;
	}
	.font-size-30 {
		font-size: 30px;
	}
</style>
