<template>
  <u-popup v-model="showPopup" width="550rpx">
    <view class="drawer-container">
      <view class="drawer-header">
        <view class="header-top">
          <view class="header-tabs">
            <u-tabs
              :list="tabList"
              :is-scroll="false"
              :current="currentTab"
              @change="changeTab"
              bg-color="transparent"
              active-color="#4F6AFF"
              inactive-color="#505866"
              bar-width="80"
              font-size="32"
              :bold="true"
            ></u-tabs>
          </view>
          <view class="header-icon" @click="handleHistoryClick">
            <u-icon name="clock" size="40" color="#333333"></u-icon>
          </view>
        </view>

        <view
          class="drawer-title header-bottom"
          @click="handleCreateConversation"
        >
          <u-icon
            class="drawer-title-icon"
            name="plus"
            size="32rpx"
            color="#666666"
          ></u-icon>
          新建对话
        </view>
      </view>
      <scroll-view
        scroll-y
        class="chat-history-list"
        :scroll-into-view="scrollToView"
        :show-scrollbar="false"
        scroll-with-animation="true"
      >
        <!-- 使用新的数据结构渲染聊天历史 -->
        <view
          v-for="(group, groupIndex) in currentChatHistory"
          :key="'group-' + group.id + groupIndex"
          @click="closePopover"
        >
          <!-- 日期标题 -->
          <view class="chat-day">
            <text class="day-text">{{ group.id }}</text>
          </view>

          <!-- 该日期下的对话列表 -->
          <view
            class="chat-item"
            v-for="(item, index) in group.conversation"
            :key="'conv-' + groupIndex + '-' + index"
            :id="'chat-item-' + item.id"
            :class="{
              'chat-item-active': item.isActiveChat,
            }"
            @click.stop="
              selectChatItem(item.id, item.conversationId, item.receiverId)
            "
          >
            <view class="chat-item-content">
              <text class="chat-text u-line-1">{{ item.title }}</text>
              <view
                class="more-icon"
                v-if="item.isActiveChat"
                :id="'more-' + item.id"
                @click.stop="togglePopover(item.id)"
              >
                <image
                  style="width: 40rpx; height: 40rpx"
                  src="/static/common/images/icon-more-white.png"
                ></image>
              </view>
            </view>

            <!-- Popover菜单 -->
            <view
              class="popover-menu"
              v-if="activePopoverId === item.id"
              @click.stop
            >
              <view
                class="popover-item"
                @click.stop="
                  selectChatItem(item.id, item.conversationId, item.receiverId)
                "
              >
                <u-icon
                  name="chat"
                  color="#4f6aff"
                  size="32"
                  custom-style="margin-right: 12rpx"
                ></u-icon>
                <text class="popover-text" style="color: #4f6aff">回复</text>
              </view>
              <view class="popover-item" @click="handleDelete(item)">
                <u-icon
                  name="trash"
                  color="#fa3534"
                  size="32"
                  custom-style="margin-right: 12rpx"
                ></u-icon>
                <text class="popover-text" style="color: #fa3534">删除</text>
              </view>
            </view>
          </view>
        </view>

        <!-- 添加底部空白区域 -->
        <view class="bottom-space"></view>
      </scroll-view>

      <view class="drawer-footer">
        <view class="user-info">
          <image class="user-avatar" :src="headSculptureUrl"></image>
          <text class="user-name">{{ userName || "晓德塔，" }}</text>
        </view>
        <view class="settings" @click="handleSettingsClick">
          <u-icon name="setting" size="40rpx" color="#999"></u-icon>
        </view>
      </view>

      <!-- 删除确认弹窗：使用 uView 的 u-modal 组件实现 -->
      <!-- <u-modal
        border-radius="20rpx"
        v-model="deleteConfirmShow"
        title="提示"
        content="删除后，该对话将不可恢复。确认删除吗？"
        :show-cancel-button="true"
        @confirm="confirmDelete"
        @cancel="cancelDelete"
      ></u-modal> -->
    </view>
  </u-popup>
</template>

<script>
export default {
  name: "ChatHistory",
  props: {
    show: {
      type: Boolean,
      default: false,
    },
    chatHistoryAI: {
      type: Array,
      default: () => [],
    },
    chatHistoryTeacher: {
      type: Array,
      default: () => [],
    },
    activeIndex: {
      type: Number,
      default: 0,
    },
    userName: {
      type: String,
      default: "",
    },
  },
  data() {
    return {
      baseUrl: "",
      showPopup: false,
      activeItemId: "", // 存储当前激活项的ID
      scrollToView: "", // 用于scroll-into-view属性
      tabList: [
        {
          name: "AI咨询",
        },
        {
          name: "人工咨询",
        },
      ],
      currentTab: 0,
      activePopoverId: null, // 当前打开的popover对应的itemId
      // 删除确认弹窗的显示状态与目标项
      // deleteConfirmShow: false,
      // deleteTargetItem: null,
    };
  },

  computed: {
    currentChatHistory() {
      return this.currentTab === 0
        ? this.chatHistoryAI
        : this.chatHistoryTeacher;
    },

    headSculptureUrl() {
      return this.$getHeadImgUrl(this.vuex_user.HeadSculptureUrl);
    },
  },

  watch: {
    show: {
      handler(newVal) {
        this.showPopup = newVal;
        // 弹层每次打开时，收起右侧“回复/删除”浮窗
        if (newVal) {
          this.activePopoverId = null;
        }
      },
      immediate: true,
    },
    showPopup(val) {
      if (val !== this.show) {
        this.$emit("update:show", val);
      }
      // 兼容从内部改变显示状态的场景，打开时关闭浮窗
      if (val) {
        this.baseUrl = this.$u.http.config.baseUrl;
        this.activePopoverId = null;
      }
    },
    // 监听聊天历史数据变化，找到激活项并滚动
    chatHistoryAI: {
      handler() {
        this.$nextTick(() => {
          this.scrollToActiveItem();
        });
      },
      deep: true,
      immediate: true,
    },
  },
  methods: {
    // 处理历史记录点击事件
    handleHistoryClick() {
      uni.navigateTo({
        url: "/pages/home/history/index",
      });
    },
    // 处理设置点击事件
    handleSettingsClick() {
      uni.navigateTo({
        url: "/pages/home/userSetting/index",
      });
    },
    // 关闭Popover
    closePopover() {
      this.activePopoverId = null;
    },
    // 切换Popover显示状态
    togglePopover(itemId) {
      if (this.activePopoverId === itemId) {
        this.activePopoverId = null;
        return;
      }

      this.activePopoverId = itemId;
    },
    // 处理回复(暂时无用)
    // handleReply(item) {
    //   this.closePopover();
    //   // 这里添加回复逻辑，比如跳转或弹窗
    //   console.log("Reply to:", item);
    //   this.$emit("reply-conversation", item);
    // },
    // 处理删除
    handleDelete(item) {
      // 关闭右侧浮窗，弹出确认弹窗
      this.closePopover();
      // this.deleteTargetItem = item;
      // this.deleteConfirmShow = true;

      this.$u.api
        .DeleteDialogueManagement({
          id: [item.id],
        })
        .then((res) => {
          if (res.succeed) {
            this.$u.toast("删除成功");
            // 刷新聊天历史数据
            this.$emit("refresh-chat-history");
          } else {
            this.$u.toast(res.msg || "删除失败");
          }
        });
    },
    // // 确认删除：确认后发出删除事件并重置状态
    // confirmDelete() {
    //   if (this.deleteTargetItem) {
    //     this.$emit("delete-conversation", this.deleteTargetItem);
    //   }
    //   this.deleteTargetItem = null;
    //   this.deleteConfirmShow = false;
    // },
    // // 取消删除：仅关闭弹窗并清空目标
    // cancelDelete() {
    //   this.deleteConfirmShow = false;
    //   this.deleteTargetItem = null;
    // },
    // 滚动到激活的聊天项
    scrollToActiveItem() {
      // 查找激活的聊天项
      let activeItemFound = false;

      for (
        let groupIndex = 0;
        groupIndex < this.chatHistoryAI.length;
        groupIndex++
      ) {
        const group = this.chatHistoryAI[groupIndex];
        for (let index = 0; index < group.conversation.length; index++) {
          const item = group.conversation[index];
          if (item.isActiveChat) {
            activeItemFound = true;
            this.activeItemId = `chat-item-${item.id}`;
            // 设置scrollToView的值，使scroll-view自动滚动到该元素
            this.scrollToView = this.activeItemId;
            break;
          }
        }
        if (activeItemFound) break;
      }
    },

    selectChatItem(id, conversationId = null, receiverId = null) {
      if (this.currentTab === 0) {
        // 点击AI聊天项
        // 向父组件发送选中的对话信息
        this.$emit("select-conversation", {
          id,
          conversationId,
        });
      } else {
        // 点击教师聊天项
        this.$store.dispatch("selectTeacherChatItem", {
          id,
          receiverId,
        });
      }
    },

    handleCreateConversation() {
      this.$emit("create-conversation");
    },
    changeTab(index) {
      this.currentTab = index;
    },
  },
};
</script>

<style lang="scss" scoped>
.drawer-container {
  padding: 32rpx;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: #ffffff;

  .drawer-header {
    .header-top {
      height: 80rpx;
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20rpx;

      .header-tabs {
        width: 300rpx;
      }
      .header-icon {
        width: 40rpx;
        height: 40rpx;
      }
    }
    .header-bottom {
      padding: 16rpx 32rpx;
    }

    .drawer-title {
      font-family: DouyinSans;
      font-weight: bold;
      font-size: 32rpx;
      color: #666666;

      .drawer-title-icon {
        margin-right: 10rpx;
      }
    }
  }

  .chat-history-list {
    flex: 1;
    height: calc(100vh - 420rpx);
    padding-bottom: 20rpx;

    .chat-day {
      display: flex;
      margin: 20rpx 0 20rpx 30rpx;

      .day-text {
        font-size: 24rpx;
        color: #999999;
        font-family: PingFang SC;
        margin-bottom: 10rpx;
      }
    }

    .chat-item {
      padding: 24rpx 24rpx 24rpx 30rpx;
      border-radius: 16rpx;
      margin-bottom: 4rpx;
      position: relative;
      // overflow: hidden; // 移除overflow hidden以便显示popover

      .chat-item-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;

        .more-icon {
          width: 40rpx;
          height: 40rpx;
        }
      }

      .chat-text {
        font-size: 28rpx;
        color: #303030;
        font-family: PingFang SC;
        flex: 1;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        margin-right: 10rpx;
      }

      &-active {
        background-color: #4f6aff;
        box-shadow: 0 2rpx 8rpx rgba(79, 106, 255, 0.3);

        .chat-text {
          color: #fff;
        }
      }

      .popover-menu {
        width: 200rpx;
        // 相对当前 chat-item 进行绝对定位，随 item 滚动
        position: absolute;
        right: 10rpx;
        top: 80rpx;
        background: linear-gradient(
          135deg,
          rgba(79, 106, 255, 0.02),
          rgba(215, 237, 237, 0.01)
        );
        box-shadow: 0px 2px 8px 0px rgba(91, 92, 94, 0.3);
        background-color: #ffffff;
        border-radius: 20rpx;
        padding: 10rpx 0;
        z-index: 10005;

        .popover-item {
          display: flex;
          gap: 12rpx;
          justify-content: center;
          align-items: center;
          padding: 20rpx 30rpx;

          &:active {
            background-color: #f5f5f5;
          }

          .popover-text {
            font-size: 28rpx;
            font-family: PingFang SC;
            font-weight: 500;
          }
        }
      }
    }
  }

  .bottom-space {
    // 增加底部留白，避免最底部项的浮层阴影被裁剪
    height: 200rpx;
    width: 100%;
  }

  .drawer-footer {
    margin-top: 20rpx;
    height: 130rpx;
    border: 1rpx solid #eeeeee;
    border-radius: 12rpx;
    padding: 0 30rpx;
    display: flex;
    justify-content: space-between;
    align-items: center;

    .user-info {
      display: flex;
      align-items: center;

      .user-avatar {
        width: 56rpx;
        height: 56rpx;
        border-radius: 50%;
        margin-right: 30rpx;
      }

      .user-name {
        font-size: 28rpx;
        font-weight: bold;
        font-family: DouyinSans;
        color: #333;
      }
    }

    .settings {
      padding: 10rpx;
    }
  }
}
</style>
