<?php
// app/service/ResourceService.php

namespace app\common\utils;

use support\Db;

class MigrationResources
{
    /**
     * 获取完整的资源树结构（不区分系统）
     *
     * @param array $conditions 筛选条件
     * @return array
     */
    public function getFullResourceTree($table = 'resources', array $conditions = []): array
    {
        // 查询所有资源数据
        $query = Db::table($table)->where($conditions);
        
        // 按排序字段排序
        $resources = $query->orderBy('sort')->orderBy('id')->get();
        // var_dump($resources->count());
        // 转换为数组
        $resourceList = [];
        foreach ($resources as $resource) {
            $resourceList[] = (array) $resource;
        }
        
        // 构建树状结构
        return $this->buildTree($resourceList);
    }
    
    /**
     * 构建树状结构
     *
     * @param array $resources 资源列表
     * @param int $parentId 父级ID
     * @return array
     */
    private function buildTree(array $resources, int $parentId = 0): array
    {
        $tree = [];
        
        foreach ($resources as $resource) {
            if ($resource['parent_id'] == $parentId) {
                // 递归获取子节点
                $children = $this->buildTree($resources, $resource['id']);
                
                // 如果有子节点，则添加到children字段
                if (!empty($children)) {
                    $resource['children'] = $children;
                }
                
                $tree[] = $resource;
            }
        }
        
        return $tree;
    }
    
    /**
     * 使用引用方式构建树（性能优化版）
     *
     * @param array $conditions 筛选条件
     * @return array
     */
    public function getFullResourceTreeOptimized($table = 'resources', array $conditions = []): array
    {
        // 查询所有资源数据
        $query = Db::table($table)->where($conditions);
        
        // 按排序字段排序
        $resources = $query->orderBy('sort')->orderBy('id')->get();
        
        // 构建ID映射和引用关系
        $resourceMap = [];
        $tree = [];
        
        // 初始化所有节点
        foreach ($resources as $resource) {
            $resourceArray = (array) $resource;
            $resourceMap[$resourceArray['id']] = $resourceArray;
        }
        
        // 构建父子关系
        foreach ($resourceMap as $id => &$node) {
            if ($node['parent_id'] == 0) {
                // 根节点
                $tree[] = &$node;
            } else {
                // 子节点
                if (isset($resourceMap[$node['parent_id']])) {
                    if (!isset($resourceMap[$node['parent_id']]['children'])) {
                        $resourceMap[$node['parent_id']]['children'] = [];
                    }
                    $resourceMap[$node['parent_id']]['children'][] = &$node;
                } else {
                    // 父节点不存在，作为根节点处理
                    $tree[] = &$node;
                }
            }
        }
        unset($node);

        return $tree;
    }
    
    /**
     * 获取扁平化的资源列表
     *
     * @param array $conditions 筛选条件
     * @return array
     */
    public function getResourceList($table = 'resources', array $conditions = []): array
    {
        $query = Db::table($table)->where($conditions);
        
        // 按排序字段排序
        $resources = $query->orderBy('sort')->orderBy('id')->get();
        
        // 转换为数组
        $resourceList = [];
        foreach ($resources as $resource) {
            $resourceList[] = (array) $resource;
        }
        
        return $resourceList;
    }


    /**
     * 递归插入资源树
     */
    private function insertResourceTree($table, $tree, $parentId, $keys = [])
    {
        $keys = ['system_id','name','desc','type','code','parent_id','url','icon','open_type','link',
            'is_hide','is_hide_tab','no_auth','is_home','instance','keep_alive','sort','status'];
        foreach ($tree as $item) {
            // 保存子节点
            $children = $item['children'] ?? [];
            
            // 过滤字段
            $filteredItem = [];
            foreach ($item as $k => $v) {
                if (in_array($k, $keys)) {
                    $filteredItem[$k] = $v;
                }
            }
            
            // 设置parent_id
            $filteredItem['parent_id'] = $parentId;
            
            // 插入并获取新ID
            $newId = Db::table($table)->insertGetId($filteredItem);
            echo "插入节点: {$filteredItem['name']}, 新ID: $newId\n";
            
            // 递归处理子节点
            if (!empty($children)) {
                $this->insertResourceTree($table, $children, $newId, $keys);
            }
        }
    }


    public function do(string $from = 'resources_20250916_bak', string $to = 'resources_yuanshi', array $where = [])
    {
        try {
            // 开启事务
            Db::beginTransaction();
            
            // 查询迁移资源的树状结果集
            $list = $this->getFullResourceTreeOptimized($from, $where);

            // 入库字段
            $keys = ['system_id','name','desc','type','code','parent_id','url','icon','open_type','link',
                'is_hide','is_hide_tab','no_auth','is_home','instance','keep_alive','sort','status'];
            
            // 使用递归处理树结构
            $this->insertResourceTree($to, $list, 0, $keys);
            
            // 提交事务
            Db::commit();
            
            echo "数据插入成功";
            
        } catch (\Exception $e) {
            // 回滚事务
            Db::rollBack();
            
            echo "数据插入失败: " . $e->getMessage() . " 在文件 " . $e->getFile() . " 第 " . $e->getLine() . " 行";
        }
    }
}