<?php

namespace App\Http\Controllers\API\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Lib\Rs;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Rule;

class SysRoleController extends Controller
{
    /**
     * 获取角色列表
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function list(Request $request)
    {
        // 获取查询参数
        $roleName = $request->input('role_name', '');
        $roleCode = $request->input('role_code', '');
        $status = $request->input('status', null);
        $page = $request->input('page', 1);
        $pageSize = $request->input('page_size', 10);

        // 构建查询
        $query = DB::table('sys_role')
            ->where('deleted', 0);

        // 添加查询条件
        if (!empty($roleName)) {
            $query->where('role_name', 'like', '%' . $roleName . '%');
        }

        if (!empty($roleCode)) {
            $query->where('role_code', 'like', '%' . $roleCode . '%');
        }

        if ($status !== null) {
            $query->where('status', $status);
        }

        // 计算总数
        $total = $query->count();

        // 分页查询
        $roles = $query->orderBy('sort', 'asc')
            ->orderBy('id', 'asc')
            ->skip(($page - 1) * $pageSize)
            ->take($pageSize)
            ->get();

        // 构造返回数据
        $data = [
            'list' => $roles,
            'total' => $total,
            'page' => $page,
            'page_size' => $pageSize,
            'total_pages' => ceil($total / $pageSize)
        ];

        return Rs::success($data);
    }
    public function Save(Request $request)
    {
        $data = $request->validate([
            'id' => 'required|integer',
            'role_name' => 'required|string|max:50',
            'role_code' => [
                'required',
                'string',
                'max:50',
                Rule::unique('sys_role', 'role_code')->ignore($request->id, 'id'),
            ],
            'status' => 'required|integer|in:0,1',
        ]);

        $conditions = ['id' => $data['id']];
        $values = [
            'role_name' => $data['role_name'],
            'role_code' => $data['role_code'],
            'status' => $data['status'],
        ];

        $updated = DB::table('sys_role')->updateOrInsert($conditions, $values);

        if ($updated) {
            return Rs::success();
        }

        return Rs::error('操作失败');
    }

    /**
     * 删除角色
     * @param Request $request

     */
    public function Delete(Request $request)
    {
        $data = $request->validate([
            'id' => 'required|integer',
        ]);

        $deleted = DB::table('sys_role')->where('id', $data['id'])->update(['deleted' => 1]);

        if ($deleted) {
            return Rs::success();
        }

        return Rs::error('删除失败');
    }

    /**
     * 获取所有权限，用于角色权限分配

     */
    public function getAllPermissions()
    {
        // 获取所有未删除的权限
        $permissions = DB::table('sys_permission')
            ->where('deleted', 0)
            ->orderBy('sort', 'asc')
            ->get();

        // 构建权限树
        $permissionTree = $this->buildPermissionTree($permissions);

        return Rs::success($permissionTree);
    }

    /**
     * 获取所有启用的角色列表（用于用户绑定角色）

     */
    public function getRoleList()
    {
        $roles = DB::table('sys_role')
            ->where('deleted', 0)
            ->where('status', 1)
            ->orderBy('sort', 'asc')
            ->get();

        return Rs::success($roles);
    }

    /**
     * 获取角色已有权限
     * @param Request $request

     */
    public function getRolePermissions(Request $request)
    {
        $data = $request->validate([
            'role_id' => 'required|integer',
        ]);

        // 获取角色已有的权限ID列表
        $permissionIds = DB::table('sys_role_permission')
            ->where('role_id', $data['role_id'])
            ->pluck('permission_id')
            ->toArray();

        return Rs::success($permissionIds);
    }

    /**
     * 保存角色权限
     * @param Request $request

     */
    public function saveRolePermissions(Request $request)
    {
        $data = $request->validate([
            'role_id' => 'required|integer',
            'permission_ids' => 'required|array',
        ]);

        // 开启事务
        DB::beginTransaction();

        try {
            // 删除角色原有权限
            DB::table('sys_role_permission')
                ->where('role_id', $data['role_id'])
                ->delete();

            // 添加新的权限关联
            $insertData = [];
            foreach ($data['permission_ids'] as $permissionId) {
                $insertData[] = [
                    'role_id' => $data['role_id'],
                    'permission_id' => $permissionId,
                    'create_time' => now(),
                ];
            }

            if (!empty($insertData)) {
                DB::table('sys_role_permission')->insert($insertData);
            }

            // 提交事务
            DB::commit();

            return Rs::success();
        } catch (\Exception $e) {
            // 回滚事务
            DB::rollBack();
            return Rs::error('保存权限失败：' . $e->getMessage());
        }
    }

    /**
     * 构建权限树
     * @param $permissions
     * @param int $parentId
     * @return array
     */
    private function buildPermissionTree($permissions, $parentId = 0)
    {
        $tree = [];

        foreach ($permissions as $permission) {
            if ($permission->parent_id == $parentId) {
                $children = $this->buildPermissionTree($permissions, $permission->id);
                if (!empty($children)) {
                    $permission->children = $children;
                }
                $tree[] = $permission;
            }
        }

        return $tree;
    }
}