<script setup>
import { ref, nextTick, computed, inject } from "vue";
import { Checkbox } from "ant-design-vue";
import { VueDraggable } from "vue-draggable-plus";
import { isGroupLayer } from "../../utils/layerHelper";
import { useI18n } from 'vue-i18n'
const {t} = useI18n()
// 设置组件名称，用于递归渲染
defineOptions({
  name: "LayerItem",
});

const props = defineProps({
  layer: {
    type: Object,
    required: true,
  },
  isChild: {
    type: Boolean,
    default: false,
  },
  isActive: {
    type: Boolean,
    default: false,
  },
  isSelected: {
    type: Boolean,
    default: false,
  },
  isMultiSelectMode: {
    type: Boolean,
    default: false,
  },
  isEditing: {
    type: Boolean,
    default: false,
  },
  editingName: {
    type: String,
    default: "",
  },
  canDelete: {
    type: Boolean,
    default: true,
  },
  // thumbnailUrl: {
  //   type: String,
  //   default: null,
  // },
  isHidenDragHandle: {
    type: Boolean,
    default: false,
  },
  expandedGroupIds: {
    type: Set,
    default: () => new Set(),
  },
});

const emit = defineEmits([
  "click",
  "double-click",
  "context-menu",
  "checkbox-change",
  "toggle-visibility",
  "toggle-lock",
  "delete",
  "edit-confirm",
  "edit-cancel",
  "edit-keydown",
  "touch-start",
  "touch-move",
  "touch-end",
  "child-layers-sort",
  "update-child-layers",
  "toggle-group-expanded",
  // 新增子图层专用事件
  "toggle-child-visibility",
  "toggle-child-lock",
  "delete-child",
  "rename-child",
  // v-model相关事件
  "update:editingName",
]);

const layerManager = inject("layerManager", null);

// 计算属性
const isGroupLayerType = computed(() => {
  return isGroupLayer(props.layer);
});

// 计算属性：检查组图层是否展开
const isGroupExpanded = computed(() => {
  return props.expandedGroupIds.has(props.layer.id);
});

// 获取子图层
const childLayers = computed(() => {
  if (!isGroupLayerType.value) return [];

  // 优先使用 layer.children 属性
  if (props.layer.children && Array.isArray(props.layer.children)) {
    return props.layer.children;
  }

  return [];
});

// 切换组图层展开/收起状态
const toggleGroupExpanded = () => {
  emit("toggle-group-expanded", props.layer.id);
};

// 获取图层类型图标
function getLayerTypeIcon(layer) {
  if (!layer) return "🖼️";

  if (isGroupLayer(layer)) {
    return "📁";
  }

  if (layer.fabricObject) {
    switch (layer.fabricObject.type) {
      case "image":
        return "🖼️";
      case "text":
        return "📝";
      case "rect":
        return "▢";
      case "circle":
        return "⬤";
      case "path":
        return "✎";
      default:
        return "⬤";
    }
  }

  return "🖼️";
}

function getLayerTypeText(layerType) {
  const typeMap = {
    EMPTY: "空图层",
    TEXT: "文本",
    IMAGE: "图片",
    SHAPE: "形状",
    GROUP: "组合",
    BACKGROUND: "背景",
    FIXED: "固定",
  };

  return typeMap[layerType] || "未知";
}

// 事件处理
function handleClick(event) {
  emit("click", props.layer, event);
}

function handleDoubleClick(event) {
  emit("double-click", props.layer, event);
}

function handleContextMenu(event) {
  emit("context-menu", event, props.layer);
}

function handleCheckboxChange(event) {
  emit("checkbox-change", props.layer.id, event);
}

function handleToggleVisibility() {
  if (props.isChild) {
    // 子图层需要传递父图层ID - 从父级组件获取
    const parentId = props.layer.parentId || findParentLayerId();
    emit("toggle-child-visibility", props.layer.id, parentId);
  } else {
    // 一级图层
    emit("toggle-visibility", props.layer.id);
  }
}

function handleToggleLock() {
  if (props.isChild) {
    // 子图层需要传递父图层ID - 从父级组件获取
    const parentId = props.layer.parentId || findParentLayerId();
    emit("toggle-child-lock", props.layer.id, parentId);
  } else {
    // 一级图层
    emit("toggle-lock", props.layer);
  }
}

function handleDelete() {
  if (!props.canDelete) {
    console.warn("当前图层无法删除:", props.layer.id);
    return;
  }
  if (props.isChild) {
    // 子图层删除：需要传递父图层ID
    const parentId = props.layer.parentId || findParentLayerId();
    if (parentId) {
      emit("delete-child", props.layer.id, parentId);
    } else {
      console.warn("无法找到子图层的父图层ID:", props.layer.id);
    }
  } else {
    // 一级图层删除
    emit("delete", props.layer.id);
  }
}

function handleEditConfirm() {
  if (props.isChild) {
    // 子图层重命名：需要传递父图层ID
    const parentId = props.layer.parentId || findParentLayerId();
    if (props.editingName && props.editingName.trim() && parentId) {
      emit("rename-child", props.layer.id, parentId, props.editingName.trim());
    } else if (!parentId) {
      console.warn("无法找到子图层的父图层ID:", props.layer.id);
    }
    // 发送编辑取消事件，清理编辑状态
    emit("edit-cancel");
  } else {
    // 一级图层重命名
    emit("edit-confirm");
  }
}

function handleEditCancel() {
  emit("edit-cancel");
}

function handleEditKeydown(event) {
  emit("edit-keydown", event); // 修复事件名称，从 "edit-keyboard" 改为 "edit-keydown"
}

function handleTouchStart(event) {
  emit("touch-start", event, props.layer);
}

function handleTouchMove(event) {
  emit("touch-move", event);
}

function handleTouchEnd(event) {
  emit("touch-end", event);
}

function handleUpdateChildLayers(newChildren) {
  // 更新当前组图层的children数组
  console.log("更新子图层顺序:", "父图层ID:", props.layer.id, "新顺序:", newChildren);
  emit("update-child-layers", props.layer.id, newChildren);
}

// 子图层递归事件处理
function handleChildClick(childLayer, event) {
  emit("click", childLayer, event);
}

function handleChildDoubleClick(childLayer, event) {
  emit("double-click", childLayer, event);
}

function handleChildContextMenu(event, childLayer) {
  emit("context-menu", event, childLayer);
}

function handleChildToggleVisibility(childLayerId) {
  emit("toggle-visibility", childLayerId);
}

function handleChildToggleLock(childLayer) {
  emit("toggle-lock", childLayer);
}

// 动画钩子函数
function onEnter(el) {
  // 设置初始状态
  el.style.height = "0";
  el.style.opacity = "0";
  el.style.paddingTop = "0";
  el.style.paddingBottom = "0";
  el.style.marginTop = "0";
  el.style.marginBottom = "0";
  el.style.overflow = "hidden";

  // 强制重排
  el.offsetHeight;

  // 获取最终高度
  el.style.height = "auto";
  const finalHeight = el.scrollHeight;
  el.style.height = "0";

  // 执行动画
  requestAnimationFrame(() => {
    el.style.transition = "all 0.3s cubic-bezier(0.4, 0, 0.2, 1)";
    el.style.height = finalHeight + "px";
    el.style.opacity = "1";
    el.style.paddingTop = "";
    el.style.paddingBottom = "";
    el.style.marginTop = "";
    el.style.marginBottom = "";
  });
}

function onLeave(el) {
  // 设置当前高度
  el.style.height = el.scrollHeight + "px";
  el.style.overflow = "hidden";

  // 强制重排
  el.offsetHeight;

  // 执行收起动画
  el.style.transition = "all 0.3s cubic-bezier(0.4, 0, 0.2, 1)";
  el.style.height = "0";
  el.style.opacity = "0";
  el.style.paddingTop = "0";
  el.style.paddingBottom = "0";
  el.style.marginTop = "0";
  el.style.marginBottom = "0";
}

// 查找父图层ID的辅助方法 - 增强版本
function findParentLayerId() {
  // 首先检查 layer 对象是否已经有 parentId 属性
  if (props.layer.parentId) {
    return props.layer.parentId;
  }

  // 如果没有，尝试从 layerManager 中查找
  if (layerManager && layerManager.layers) {
    for (const layer of layerManager.layers.value) {
      if (
        layer.children &&
        Array.isArray(layer.children) &&
        layer.children.some((child) => child.id === props.layer.id)
      ) {
        return layer.id;
      }
    }
  }

  console.warn("无法找到图层的父图层:", props.layer.id);
  return null;
}
</script>

<template>
  <div>
    <!-- 主图层项 -->
    <div
      :class="[
        'layer-item',
        {
          'child-layer': isChild,
          active: isActive,
          selected: isSelected,
          'group-layer': isGroupLayerType,
          editing: isEditing,
          'multi-select-mode': isMultiSelectMode,
          invisible: !layer.visible,
          locked: layer.locked,
          'fixed-layer': layer.isBackground || layer.isFixed,
        },
      ]"
      :data-layer-id="layer.id"
      @click="handleClick"
      @dblclick="handleDoubleClick"
      @touchstart="handleTouchStart"
      @touchmove="handleTouchMove"
      @touchend="handleTouchEnd"
      @contextmenu.prevent="handleContextMenu"
    >
      <!-- 拖拽手柄 -->
      <div class="layer-drag-handle" :title="$t('拖拽排序')">
        <SvgIcon v-if="!isHidenDragHandle" :name="isChild ? 'CSort' : 'CSort'" :size="32"></SvgIcon>
      </div>

      <!-- 图层头部 -->
      <div class="layer-header">
        <!-- 多选复选框 -->
        <div v-if="isMultiSelectMode && !isChild" class="layer-checkbox" @click.stop>
          <Checkbox :checked="isSelected" @change="handleCheckboxChange" />
        </div>

        <!-- 图层预览图标 -->
        <div class="layer-review">
          <img
            v-if="layer.thumbnailUrl"
            :src="layer.thumbnailUrl"
            class="layer-thumbnail"
            :alt="$t('Canvas.preview')"
          />
        </div>

        <!-- 图层名称 -->
        <div class="layer-name-container" :title="layer.name">
          <div class="layer-name-wrapper">
            <span v-if="!isEditing" class="layer-name text-ellipsis">
              {{ layer.name }}
            </span>
            <input
              v-else
              :value="editingName"
              :data-layer-id="layer.id"
              :data-child-layer-id="isChild ? layer.id : undefined"
              class="layer-name-input"
              @blur="handleEditConfirm"
              @keydown="handleEditKeydown"
              @click.stop
              @input="$emit('update:editingName', $event.target.value)"
            />
          </div>
        </div>

        <!-- 图层操作按钮 -->
        <div class="layer-actions" v-if="!(isGroupLayerType && !isChild)">
          <!-- 可见性切换 -->
          <div
            class="visibility-btn"
            @click.stop="handleToggleVisibility"
            :title="$t('Canvas.showHiddenLayer')"
          >
            <SvgIcon v-if="layer.visible" name="CEye" :size="16"></SvgIcon>
            <SvgIcon v-else name="CUnEye" :size="16"></SvgIcon>
          </div>

          <!-- 锁定状态 -->
          <span
            v-if="layer.locked"
            class="status-icon locked"
            :class="{ disabled: layer.isBackground || layer.isFixed }"
            :title="$t('锁定')"
            @click.stop="handleToggleLock"
          >
            <SvgIcon name="CLock" :size="18"></SvgIcon>
          </span>
          <span v-else class="status-icon" :title="$t('未锁定')" @click.stop="handleToggleLock">
            <SvgIcon name="CUnLock" :size="18"></SvgIcon>
          </span>

          <!-- 删除按钮 -->
          <div
            class="delete-btn"
            :class="{ disabled: !canDelete }"
            :title="$t('Canvas.deleteLayer')"
            @click.stop="handleDelete"
          >
            <SvgIcon name="CDelete" size="14"></SvgIcon>
          </div>
        </div>

        <!-- 组图层展开/收起图标 -->
        <div
          v-if="isGroupLayerType && !isChild"
          class="group-expand-icon"
          @click.stop="toggleGroupExpanded"
          @dblclick.stop=""
          :title="isGroupExpanded ? $t('Canvas.CollapseUp') : $t('Canvas.CollapseDown')"
        >
          <SvgIcon
            name="CRight"
            :size="12"
            :style="{
              transform: isGroupExpanded ? 'rotate(45deg)' : 'rotate(0deg)',
              transition: 'transform 0.2s',
            }"
          />
        </div>

        <!-- 图层状态指示器 -->
        <!-- <div v-if="!isChild" class="layer-status">
          <span
            v-if="isGroupLayerType"
            class="status-icon group"
            :title="$t('组图层')"
          >
            📁
          </span>
        </div> -->
      </div>
    </div>
  </div>
</template>

<style scoped lang="less">
@import "./layersPanel.less";
</style>
