import {
  productcontrollerCreatecategory,
  productcontrollerCreatecategoryattribute,
  productcontrollerDeletecategory,
  productcontrollerDeletecategoryattribute,
  productcontrollerGetcategoriesall,
  productcontrollerGetcategoryattributes,
  productcontrollerUpdatecategory,
} from '@/servers/api/product';
import { PlusOutlined } from '@ant-design/icons';
import { PageContainer } from '@ant-design/pro-components';
import { request } from '@umijs/max';
import {
  Button,
  Card,
  Form,
  Input,
  Layout,
  List,
  Modal,
  Popconfirm,
  Select,
  message,
} from 'antd';
import React, { useEffect, useState } from 'react';
import { notAttributes } from '../Product/Attribute/consts';

const { Sider, Content } = Layout;

const CategoryPage: React.FC = () => {
  const [categories, setCategories] = useState<any[]>([]);
  const [loadingCategories, setLoadingCategories] = useState(false);
  const [selectedCategory, setSelectedCategory] = useState<any>(null);
  const [categoryAttributes, setCategoryAttributes] = useState<any[]>([]);
  const [loadingAttributes, setLoadingAttributes] = useState(false);

  const [isCategoryModalVisible, setIsCategoryModalVisible] = useState(false);
  const [categoryForm] = Form.useForm();
  const [editingCategory, setEditingCategory] = useState<any>(null);

  const [isAttributeModalVisible, setIsAttributeModalVisible] = useState(false);
  const [availableDicts, setAvailableDicts] = useState<any[]>([]);
  const [selectedDictIds, setSelectedDictIds] = useState<number[]>([]);

  const fetchCategories = async () => {
    setLoadingCategories(true);
    try {
      const res = await productcontrollerGetcategoriesall();
      setCategories(res || []);
    } catch (error) {
      message.error('获取分类列表失败');
    }
    setLoadingCategories(false);
  };

  useEffect(() => {
    fetchCategories();
  }, []);

  const fetchCategoryAttributes = async (categoryId: number) => {
    setLoadingAttributes(true);
    try {
      const res = await productcontrollerGetcategoryattributes({
        categoryItemId: categoryId,
      });
      setCategoryAttributes(res || []);
    } catch (error) {
      message.error('获取分类属性失败');
    }
    setLoadingAttributes(false);
  };

  useEffect(() => {
    if (selectedCategory) {
      fetchCategoryAttributes(selectedCategory.id);
    } else {
      setCategoryAttributes([]);
    }
  }, [selectedCategory]);

  const handleCategorySubmit = async (values: any) => {
    try {
      if (editingCategory) {
        await productcontrollerUpdatecategory(
          { id: editingCategory.id },
          values,
        );
        message.success('更新成功');
      } else {
        await productcontrollerCreatecategory(values);
        message.success('创建成功');
      }
      setIsCategoryModalVisible(false);
      fetchCategories();
    } catch (error: any) {
      message.error(error.message || '操作失败');
    }
  };

  const handleDeleteCategory = async (id: number) => {
    try {
      await productcontrollerDeletecategory({ id });
      message.success('删除成功');
      if (selectedCategory?.id === id) {
        setSelectedCategory(null);
      }
      fetchCategories();
    } catch (error: any) {
      message.error(error.message || '删除失败');
    }
  };

  const handleAddAttribute = async () => {
    // Fetch all dicts and filter those that are allowed attributes
    try {
      const res = await request('/dict/list');
      const filtered = (res || []).filter(
        (d: any) => !notAttributes.has(d.name),
      );
      // Filter out already added attributes
      const existingDictIds = new Set(
        categoryAttributes.map((ca: any) => ca.dict.id),
      );
      const available = filtered.filter((d: any) => !existingDictIds.has(d.id));
      setAvailableDicts(available);
      setSelectedDictIds([]);
      setIsAttributeModalVisible(true);
    } catch (error) {
      message.error('获取属性字典失败');
    }
  };

  const handleAttributeSubmit = async () => {
    if (selectedDictIds.length === 0) {
      message.warning('请选择属性');
      return;
    }
    try {
      await productcontrollerCreatecategoryattribute({
        categoryItemId: selectedCategory.id,
        attributeDictIds: selectedDictIds,
      });
      message.success('添加属性成功');
      setIsAttributeModalVisible(false);
      fetchCategoryAttributes(selectedCategory.id);
    } catch (error: any) {
      message.error(error.message || '添加失败');
    }
  };

  const handleDeleteAttribute = async (id: number) => {
    try {
      await productcontrollerDeletecategoryattribute({ id });
      message.success('移除属性成功');
      fetchCategoryAttributes(selectedCategory.id);
    } catch (error: any) {
      message.error(error.message || '移除失败');
    }
  };

  return (
    <PageContainer>
      <Layout style={{ background: '#fff', height: 'calc(100vh - 200px)' }}>
        <Sider
          width={300}
          style={{
            background: '#fff',
            borderRight: '1px solid #f0f0f0',
            padding: '16px',
          }}
        >
          <div
            style={{
              marginBottom: 16,
              display: 'flex',
              justifyContent: 'space-between',
              alignItems: 'center',
            }}
          >
            <span style={{ fontWeight: 'bold' }}>分类列表</span>
            <Button
              type="primary"
              size="small"
              icon={<PlusOutlined />}
              onClick={() => {
                setEditingCategory(null);
                categoryForm.resetFields();
                setIsCategoryModalVisible(true);
              }}
            >
              新增
            </Button>
          </div>
          <List
            loading={loadingCategories}
            dataSource={categories}
            renderItem={(item) => (
              <List.Item
                className={
                  selectedCategory?.id === item.id ? 'ant-list-item-active' : ''
                }
                style={{
                  cursor: 'pointer',
                  background:
                    selectedCategory?.id === item.id
                      ? '#e6f7ff'
                      : 'transparent',
                  padding: '8px 12px',
                  borderRadius: '4px',
                }}
                onClick={() => setSelectedCategory(item)}
                actions={[
                  <a
                    key="edit"
                    onClick={(e) => {
                      e.stopPropagation();
                      setEditingCategory(item);
                      categoryForm.setFieldsValue(item);
                      setIsCategoryModalVisible(true);
                    }}
                  >
                    编辑
                  </a>,
                  <Popconfirm
                    key="delete"
                    title="确定删除该分类吗?"
                    onConfirm={(e) => {
                      e?.stopPropagation();
                      handleDeleteCategory(item.id);
                    }}
                    onCancel={(e) => e?.stopPropagation()}
                  >
                    <a
                      onClick={(e) => e.stopPropagation()}
                      style={{ color: 'red' }}
                    >
                      删除
                    </a>
                  </Popconfirm>,
                ]}
              >
                <List.Item.Meta title={item.title} description={item.name} />
              </List.Item>
            )}
          />
        </Sider>
        <Content style={{ padding: '24px' }}>
          {selectedCategory ? (
            <Card
              title={`分类:${selectedCategory.title} (${selectedCategory.name})`}
              extra={
                <Button type="primary" onClick={handleAddAttribute}>
                  添加关联属性
                </Button>
              }
            >
              <List
                loading={loadingAttributes}
                dataSource={categoryAttributes}
                renderItem={(item) => (
                  <List.Item
                    actions={[
                      <Popconfirm
                        title="确定移除该属性吗?"
                        onConfirm={() => handleDeleteAttribute(item.id)}
                      >
                        <Button type="link" danger>
                          移除
                        </Button>
                      </Popconfirm>,
                    ]}
                  >
                    <List.Item.Meta
                      title={item.dict.title}
                      description={`Code: ${item.dict.name}`}
                    />
                  </List.Item>
                )}
              />
            </Card>
          ) : (
            <div
              style={{
                display: 'flex',
                justifyContent: 'center',
                alignItems: 'center',
                height: '100%',
                color: '#999',
              }}
            >
              请选择左侧分类
            </div>
          )}
        </Content>
      </Layout>

      <Modal
        title={editingCategory ? '编辑分类' : '新增分类'}
        open={isCategoryModalVisible}
        onOk={() => categoryForm.submit()}
        onCancel={() => setIsCategoryModalVisible(false)}
      >
        <Form
          form={categoryForm}
          onFinish={handleCategorySubmit}
          layout="vertical"
        >
          <Form.Item name="title" label="标题" rules={[{ required: true }]}>
            <Input />
          </Form.Item>
          <Form.Item
            name="name"
            label="标识 (Code)"
            rules={[{ required: true }]}
          >
            <Input />
          </Form.Item>
        </Form>
      </Modal>

      <Modal
        title="添加关联属性"
        open={isAttributeModalVisible}
        onOk={handleAttributeSubmit}
        onCancel={() => setIsAttributeModalVisible(false)}
      >
        <Form layout="vertical">
          <Form.Item label="选择属性">
            <Select
              mode="multiple"
              style={{ width: '100%' }}
              placeholder="请选择要关联的属性"
              value={selectedDictIds}
              onChange={setSelectedDictIds}
              options={availableDicts.map((d) => ({
                label: d.title,
                value: d.id,
              }))}
            />
          </Form.Item>
        </Form>
      </Modal>
    </PageContainer>
  );
};

export default CategoryPage;