<?php
namespace app\admin\controller;

use support\Request;
use app\common\model\Permission;

class PermissionController
{
    public function list(Request $request)
    {
        // 返回树形结构或者普通列表
        $permissions = Permission::orderBy('sort', 'asc')->get();
        return jsonResponse($permissions);
    }

    public function create(Request $request)
    {
        $name = trim($request->post('name', ''));
        $code = trim($request->post('code', ''));
        $parent_id = (int)$request->post('parent_id', 0);
        $type = (int)$request->post('type', 1); // 1菜单 2按钮
        $sort = (int)$request->post('sort', 0);
        
        if (!$name || !$code) {
            return jsonResponse(null, '名称和代码必填', 400);
        }
        
        if (Permission::where('code', $code)->exists()) {
            return jsonResponse(null, '代码已存在', 400);
        }
        
        $permission = Permission::create([
            'name' => $name,
            'code' => $code,
            'parent_id' => $parent_id,
            'type' => $type,
            'sort' => $sort,
        ]);
        
        return jsonResponse($permission, '创建成功');
    }

    public function update(Request $request)
    {
        $id = (int)$request->post('id');
        $permission = Permission::find($id);
        if (!$permission) {
            return jsonResponse(null, '权限不存在', 404);
        }
        
        $name = trim($request->post('name', ''));
        $code = trim($request->post('code', ''));
        
        if ($name) $permission->name = $name;
        if ($code && $code !== $permission->code) {
            if (Permission::where('code', $code)->exists()) {
                return jsonResponse(null, '代码已存在', 400);
            }
            $permission->code = $code;
        }
        
        if ($request->post('parent_id') !== null) {
            $permission->parent_id = (int)$request->post('parent_id');
        }
        if ($request->post('type') !== null) {
            $permission->type = (int)$request->post('type');
        }
        if ($request->post('sort') !== null) {
            $permission->sort = (int)$request->post('sort');
        }
        
        $permission->save();
        return jsonResponse(null, '更新成功');
    }

    public function delete(Request $request)
    {
        $id = (int)$request->post('id');
        $permission = Permission::find($id);
        if (!$permission) {
            return jsonResponse(null, '权限不存在', 404);
        }
        
        if (Permission::where('parent_id', $id)->exists()) {
            return jsonResponse(null, '存在子权限，不可删除', 400);
        }
        
        $permission->delete();
        // Remove from role_permissions
        \Illuminate\Database\Capsule\Manager::table('role_permissions')->where('permission_id', $id)->delete();
        
        return jsonResponse(null, '删除成功');
    }
}