<template>
	<uni-nav-bar
		left-icon="left"
		title="视频详情"
		@clickLeft="goBack"
		fixed
		color="#8B2316"
		height="140rpx"
		:border="false"
		backgroundColor="#eeeeee"
	>
		<template #right>
			<view class="nav-actions">
				<uni-icons type="share" size="22" color="#8B2316" />
				<uni-icons type="heart" size="22" color="#8B2316" />
			</view>
		</template>
	</uni-nav-bar>

	<view class="video-detail-page">
		<scroll-view class="content-scroll" scroll-y :show-scrollbar="false" @scrolltolower="onScrollToLower" lower-threshold="60">
			<!-- 视频区域 -->
			<view class="player-wrapper">
				<video class="player" :src="videoSrc" :poster="poster" controls objectFit="contain"></video>
			</view>

			<!-- 标签切换 -->
			<view class="tabs">
				<view class="tab" :class="{ active: activeTab === 'info' }" @click="switchTab('info')">视频简介</view>
				<view class="tab" :class="{ active: activeTab === 'comment' }" @click="switchTab('comment')">评论</view>
			</view>

			<!-- 内容区 -->
			<view v-if="activeTab === 'info'" class="intro">
				<view class="speaker">陈煜 教授</view>
				<text class="intro-text">{{ introText }}</text>
			</view>
			<view v-else class="comments">
				<view v-if="commentList.length === 0" class="empty">暂无评论</view>
				<view v-else>
					<view class="comment-item" v-for="(c, idx) in commentList" :key="idx">
						<image class="avatar" :src="c.avatar" mode="aspectFill" />
						<view class="meta">
							<view class="name">{{ c.name }}</view>
							<view class="content">{{ c.content }}</view>
							<view class="time">{{ c.time }}</view>
						</view>
						<view class="reply-btn" @click="onReply(c)">回复</view>
					</view>
					<!-- 加载状态/没有更多 -->
					<view v-if="loading" class="list-loading">加载中...</view>
					<view v-if="noMore" class="list-no-more">没有更多了</view>
				</view>
			</view>

			<!-- 留白，避免被底部按钮遮挡 -->
			<!-- <view class="bottom-spacer"></view> -->
		</scroll-view>
	</view>

	<!-- 底部区域：信息页为下载条，评论页为上传图片+输入+发送 -->
	<view v-if="activeTab === 'info'" class="bottom-download" @click="onDownload">
		<text class="download-text">点击下载(限时<text class="discount">5</text>折，仅需50积分)</text>
	</view>
	<view v-else class="bottom-comment">
		<input class="comment-input" v-model="commentText" placeholder="我也说一句" confirm-type="send" @confirm="sendComment" />
		<view class="send-btn" @click="sendComment">发送</view>
	</view>
</template>

<script setup>
import { ref } from 'vue';

const videoSrc = ref('');
const poster = ref('/static/livebg.png');
const activeTab = ref('info');

const introText = ref(
	'首都医科大学附属北京佑安医院，肝病中心四科主任（疑难肝病与人工肝中心主任），主任医师，教授，博士生导师。中华医学会肝病学分会副秘书长、委员、终末期肝病学组副组长，北京医学会肝病学分会常委，肝衰竭及人工肝学组副组长，北京肝胆相照公益基金会副理事长等。发表论文500余篇，累计SCI论文150余篇，出版专著20余部，获得科研奖项10余项，获得发明专利7项。'
);

// 示例评论数据
const commentList = ref([
  {
    avatar: '/static/icon_home_my_public.png',
    name: '肝胆相照测试号4',
    content: 'hhjh',
    time: '2025-07-01 17:17:13'
  },
  {
    avatar: '/static/icon_home_my_public.png',
    name: '肝胆相照测试号4',
    content: 'kkkk',
    time: '2025-07-01 17:17:18'
  },
  {
    avatar: '/static/icon_home_my_public.png',
    name: '肝胆相照测试号4',
    content: 'nnj',
    time: '2025-07-01 17:17:22'
  }
]);

const switchTab = (tab) => {
	activeTab.value = tab;
};

const onDownload = () => {
	uni.showToast({ title: '前往下载页', icon: 'none' });
};

const goBack = () => {
	uni.navigateBack();
};

const onReply = (c) => {
  uni.showToast({ title: `回复：${c.name}`, icon: 'none' });
};

// 评论输入
const commentText = ref('');
const sendComment = () => {
  if (!commentText.value.trim()) {
    uni.showToast({ title: '请输入内容', icon: 'none' });
    return;
  }
  commentList.value.unshift({
    avatar: '/static/icon_home_my_public.png',
    name: '我',
    content: commentText.value,
    time: new Date().toISOString().slice(0, 19).replace('T', ' ')
  });
  commentText.value = '';
};

// 上拉加载
const page = ref(1);
const pageSize = ref(10);
const loading = ref(false);
const noMore = ref(false);

const mockMore = Array.from({ length: 30 }).map((_, i) => ({
  avatar: '/static/icon_home_my_public.png',
  name: '肝胆相照测试号4',
  content: `更多评论 ${i + 1}`,
  time: `2025-07-01 17:${20 + Math.floor(i / 2)}:${10 + (i % 2) * 5}`
}));

const onScrollToLower = async () => {
  if (activeTab.value !== 'comment' || loading.value || noMore.value) return;
  loading.value = true;
  try {
    await new Promise(r => setTimeout(r, 600));
    const start = (page.value - 1) * pageSize.value;
    const chunk = mockMore.slice(start, start + pageSize.value);
    if (!chunk.length) {
      noMore.value = true;
    } else {
      commentList.value.push(...chunk);
      page.value += 1;
    }
  } finally {
    loading.value = false;
  }
};
</script>

<style lang="scss" scoped>
$nav-h: 140rpx;
$bottom-h: 100rpx;
$bg-color: #f7f7f7;
$text-primary: #333;
$text-secondary: #666;
$theme-color: #8B2316;

.nav-actions {
	display: flex;
	align-items: center;
	gap: 20rpx;
}

.video-detail-page {
	height: calc(100vh - #{$nav-h} - #{$bottom-h});
	background: $bg-color;
	overflow: hidden;
}

.content-scroll {
	height: 100%;
}

.player-wrapper {
	background: #fff;
}

.player {
	width: 100%;
	height: 420rpx;
	background: #000;
	border-bottom: 1rpx solid #eee;
}

.tabs {
	background: #fff;
	display: flex;
	justify-content: center;
	gap: 240rpx;
	padding: 24rpx 0 0;
	position: sticky;
	border-bottom:2rpx solid #cccccc;
	top: 0;
	z-index: 5;

	.tab {
		position: relative;
		padding: 16rpx 0 24rpx;
		color: $text-secondary;
		font-size: 28rpx;

		&.active {
			color: $theme-color;
		}

		&.active::after {
			content: '';
			position: absolute;
			left: 50%;
			bottom: 0;
			transform: translateX(-50%);
			width: 64rpx;
			height: 6rpx;
			border-radius: 6rpx;
			background: $theme-color;
		}
	}
}

.intro {
	background: #fff;
	padding: 24rpx 28rpx 40rpx;

	.speaker {
		font-size: 32rpx;
		color: $text-primary;
		margin: 12rpx 0 20rpx;
	}

	.intro-text {
		font-size: 30rpx;
		line-height: 1.8;
		color: $text-primary;
	}
}

.comments {
	background: #fff;
	min-height: 300rpx;
	padding: 20rpx 20rpx 40rpx;

	.empty {
		text-align: center;
		color: $text-secondary;
		padding: 60rpx 0;
	}

	.comment-item {
		display: flex;
		align-items: flex-start;
		padding: 24rpx 10rpx;
		border-bottom: 2rpx solid #f0f0f0;

		.avatar {
			width: 100rpx;
			height: 100rpx;
			border-radius: 20rpx;
			margin-right: 20rpx;
			background: #eee;
		}

		.meta {
			flex: 1;
			min-width: 0;

			.name {
				font-size: 30rpx;
				color: #1f1f1f;
				margin-bottom: 6rpx;
			}

			.content {
				font-size: 30rpx;
				color: #666;
				line-height: 1.6;
				margin-bottom: 12rpx;
				word-break: break-word;
			}

			.time {
				font-size: 24rpx;
				color: #909399;
			}
		}

		.reply-btn {
			margin-left: 16rpx;
			border: 2rpx solid #8B2316;
			color: #8B2316;
			border-radius: 36rpx;
			padding: 10rpx 24rpx;
			font-size: 26rpx;
			white-space: nowrap;
		}
	}

	.list-loading,
	.list-no-more {
		text-align: center;
		color: #9aa0a6;
		padding: 20rpx 0;
		font-size: 26rpx;
	}
}

.bottom-spacer {
	height: 40rpx;
}

.bottom-download {
	position: fixed;
	left: 0;
	right: 0;
	bottom: 0;
	height: $bottom-h;
	background: #00cac1;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 10;
    .discount{
		color:#d4ff00;
		font-size: 40rpx;
	}
	.download-text {
		color: #fff;
		font-size: 30rpx;
	}
}

.bottom-comment {
	position: fixed;
	left: 0;
	right: 0;
	bottom: 0;
	height: 100rpx;
	background: #ffffff;
	display: flex;
	align-items: center;
	padding: 0 20rpx;
	gap: 16rpx;
	z-index: 10;

	.comment-input {
		flex: 1;
		height: 72rpx;
		border-radius: 10rpx;
		background: #ffffff;
		border: 2rpx solid #cacaca;
		padding: 0 24rpx;
		font-size: 28rpx;
		color: #333;
	}

	.send-btn {
		padding: 0 28rpx;
		height: 72rpx;
		border-radius: 36rpx;
		background: #8B2316;
		color: #fff;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 28rpx;
	}
}
</style>