<template>
  <view class="avatar-page" :style="{ paddingTop: getBavBarHeight() + 'px' }">
    <view class="nav-bar">
      <view class="back" @tap="goBack">‹</view>
      <text class="nav-title-left">新春头像挂饰</text>
    </view>
    <view class="preview-card">
      <view class="preview-square">
        <image class="avatar-img" :src="currentAvatar" mode="aspectFill" />
        <image
          v-if="selectedFrame"
          class="frame-img"
          :src="selectedFrame"
          mode="aspectFill"
        />
        <image
          v-if="selectedDecor"
          class="decor-img"
          :src="selectedDecor"
          mode="aspectFit"
        />
      </view>
      <text class="preview-tip">实时预览效果</text>
    </view>

    <view class="quick-actions">
      <button class="btn wechat" @tap="useWeChatAvatar">使用微信头像</button>
    </view>

    <view class="section">
      <view class="section-header">
        <text class="section-title">系统推荐头像</text>
      </view>
      <scroll-view scroll-x class="avatar-scroll" show-scrollbar="false">
        <view class="avatar-list">
          <view
            v-for="(item, i) in systemAvatars"
            :key="i"
            class="avatar-card"
            :class="{ active: currentAvatar === item }"
            @tap="currentAvatar = item"
          >
            <image :src="item" class="avatar-thumb" mode="aspectFill" />
            <view v-if="currentAvatar === item" class="check">✔</view>
          </view>
        </view>
      </scroll-view>
    </view>

    <view class="tabs">
      <view
        class="tab"
        :class="{ active: activeTab === 'frame' }"
        @tap="activeTab = 'frame'"
        >头像框</view
      >
      <view
        class="tab"
        :class="{ active: activeTab === 'decor' }"
        @tap="activeTab = 'decor'"
        >挂饰配件</view
      >
    </view>

    <view v-if="activeTab === 'frame'" class="grid">
      <view
        v-for="(frame, i) in frames"
        :key="i"
        class="grid-item"
        :class="{ active: selectedFrame === frame }"
        @tap="selectedFrame = frame"
      >
        <image :src="frame" class="grid-img" mode="aspectFill" />
        <view v-if="selectedFrame === frame" class="check">✔</view>
      </view>
    </view>

    <view v-else class="grid">
      <view
        v-for="(decor, i) in decors"
        :key="i"
        class="grid-item"
        :class="{ active: selectedDecor === decor }"
        @tap="selectedDecor = decor"
      >
        <image :src="decor" class="grid-img" mode="aspectFit" />
        <view v-if="selectedDecor === decor" class="check">✔</view>
      </view>
    </view>

    <view class="bottom-actions">
      <button class="btn primary" @tap="saveAndUse">保存并使用</button>
      <button class="btn secondary" @tap="share">分享</button>
    </view>

    <canvas
      canvas-id="avatarCanvas"
      class="hidden-canvas"
      style="width: 600px; height: 600px"
    />
  </view>
</template>

<script setup>
import { ref } from "vue";
import { getBavBarHeight } from "@/utils/system";

const systemAvatars = [
  "https://file.lihailezzc.com/resource/1463f294244c11cf274a5eaae115872a.jpeg",
  "https://file.lihailezzc.com/20260109082842_666_1.jpg",
  "https://file.lihailezzc.com/20260108222141_644_1.jpg",
  "https://file.lihailezzc.com/9a929a32-439f-453b-b603-fda7b04cbe08.png",
];
const frames = [
  "https://file.lihailezzc.com/resource/0f8e6a78c1b04a4fb3a6fa1c66f1f7b3.png",
  "https://file.lihailezzc.com/resource/4a4f0c9e6e1b4c0b9f6f7a1b2c3d4e5f.png",
  "https://file.lihailezzc.com/resource/aa77f0b45b2e4a0f91c4fda74f3f1123.png",
  "https://file.lihailezzc.com/resource/bb88f0b45b2e4a0f91c4fda74f3f1199.png",
];
const decors = [
  "https://file.lihailezzc.com/resource/horse_decor_01.png",
  "https://file.lihailezzc.com/resource/horse_decor_02.png",
  "https://file.lihailezzc.com/resource/horse_decor_03.png",
  "https://file.lihailezzc.com/resource/horse_decor_04.png",
];

const currentAvatar = ref(systemAvatars[0]);
const selectedFrame = ref("");
const selectedDecor = ref("");
const activeTab = ref("frame");

const useWeChatAvatar = () => {
  uni.showToast({ title: "已应用微信头像", icon: "none" });
};

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

const saveAndUse = async () => {
  const ctx = uni.createCanvasContext("avatarCanvas");
  const size = 600;
  const avatarPath = await loadImage(currentAvatar.value);
  ctx.clearRect(0, 0, size, size);
  ctx.drawImage(avatarPath, 0, 0, size, size);
  if (selectedFrame.value) {
    const framePath = await loadImage(selectedFrame.value);
    ctx.drawImage(framePath, 0, 0, size, size);
  }
  if (selectedDecor.value) {
    const decorPath = await loadImage(selectedDecor.value);
    ctx.drawImage(decorPath, 0, 0, size, size);
  }
  ctx.draw(false, () => {
    uni.canvasToTempFilePath({
      canvasId: "avatarCanvas",
      success: (res) => {
        uni.saveImageToPhotosAlbum({
          filePath: res.tempFilePath,
          success: () => {
            uni.showToast({ title: "已保存并设置", icon: "success" });
          },
        });
      },
    });
  });
};

const share = () => {
  uni.showToast({ title: "已生成，可在相册分享", icon: "none" });
};

const loadImage = (url) => {
  return new Promise((resolve, reject) => {
    uni.getImageInfo({
      src: url,
      success: (res) => resolve(res.path),
      fail: reject,
    });
  });
};
</script>

<style lang="scss" scoped>
.avatar-page {
  min-height: 100vh;
  background: #fff;
  box-sizing: border-box;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-bar {
  display: flex;
  align-items: center;
  padding: 16rpx 24rpx;
}
.back {
  font-size: 40rpx;
  margin-right: 12rpx;
}
.nav-title-left {
  font-size: 32rpx;
  font-weight: 600;
}
.preview-card {
  margin: 20rpx 24rpx;
  background: #fff;
  border-radius: 24rpx;
  padding: 24rpx;
  box-shadow: 0 8rpx 20rpx rgba(0, 0, 0, 0.06);
}
.preview-square {
  width: 600rpx;
  height: 600rpx;
  margin: 0 auto;
  border-radius: 24rpx;
  background: #f5dfc9;
  position: relative;
  overflow: hidden;
}
.avatar-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.frame-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.decor-img {
  position: absolute;
  top: -40rpx;
  left: 50%;
  transform: translateX(-50%);
  width: 240rpx;
  height: 240rpx;
}
.preview-tip {
  display: block;
  text-align: center;
  color: #999;
  font-size: 22rpx;
  margin-top: 12rpx;
}
.quick-actions {
  display: flex;
  gap: 16rpx;
  padding: 0 24rpx;
  margin-top: 8rpx;
}
.btn {
  height: 80rpx;
  border-radius: 999rpx;
  padding: 0 32rpx;
  font-size: 28rpx;
}
.btn.wechat {
  background: #ff3b30;
  color: #fff;
}

.section {
  margin-top: 24rpx;
  padding: 0 24rpx;
}
.section-header {
  display: flex;
  align-items: center;
  margin-bottom: 12rpx;
}
.section-title {
  font-size: 26rpx;
  font-weight: 600;
}
.avatar-scroll {
  width: 100%;
}
.avatar-list {
  display: flex;
}
.avatar-card {
  width: 160rpx;
  height: 160rpx;
  border-radius: 16rpx;
  overflow: hidden;
  margin-right: 16rpx;
  position: relative;
  background: #fff;
  box-shadow: 0 6rpx 16rpx rgba(0, 0, 0, 0.06);
}
.avatar-card.active {
  outline: 4rpx solid #ff3b30;
}
.avatar-thumb {
  width: 100%;
  height: 100%;
}
.check {
  position: absolute;
  right: 8rpx;
  top: 8rpx;
  width: 32rpx;
  height: 32rpx;
  border-radius: 50%;
  background: #ff3b30;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22rpx;
}

.tabs {
  display: flex;
  padding: 16rpx 24rpx 8rpx;
  gap: 12rpx;
}
.tab {
  flex: 1;
  text-align: center;
  background: #f7f7f7;
  border-radius: 999rpx;
  height: 64rpx;
  line-height: 64rpx;
  font-size: 26rpx;
  color: #666;
}
.tab.active {
  background: #fff0f0;
  color: #ff3b30;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16rpx;
  padding: 8rpx 24rpx 24rpx;
}
.grid-item {
  height: 200rpx;
  border-radius: 16rpx;
  background: #fff;
  overflow: hidden;
  position: relative;
  box-shadow: 0 6rpx 16rpx rgba(0, 0, 0, 0.06);
}
.grid-item.active {
  outline: 4rpx solid #ff3b30;
}
.grid-img {
  width: 100%;
  height: 100%;
}

.bottom-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20rpx 24rpx 40rpx;
}
.btn.primary {
  background: #ff3b30;
  color: #fff;
  box-shadow: 0 12rpx 24rpx rgba(255, 59, 48, 0.35);
}
.btn.secondary {
  background: #f5f5f5;
  color: #333;
}

.hidden-canvas {
  position: fixed;
  left: -9999px;
  top: -9999px;
}
</style>
