<?php

declare(strict_types=1);

namespace app\miniapi\service;

use app\miniapi\model\MiniUser;
use app\miniapi\model\MiniGrant;
use app\miniapi\http\Fields;
use app\miniapi\http\Input;
use app\miniapi\http\Pagination;
use app\miniapi\support\PhoneNumber;
use app\miniapi\exception\ApiException;
use plugin\saiadmin\app\model\water\WaterOperator;

final class IdentityManagement
{
    private function authorize(int $admin): void
    {
        if ($admin !== 1 || !WaterOperator::query()->where('id', $admin)->where('status', 1)->whereNull('delete_time')->exists()) {
            throw new ApiException(40301, '仅超级管理员可管理小程序身份', 403);
        }
    }

    public function users(int $admin, array $input): array
    {
        $this->authorize($admin);
        $page = new Pagination($input);
        $q = MiniUser::query();
        if (isset($input['user_id'])) {
            $q->where('id', Fields::id($input, 'user_id'));
        }
        $total = (clone $q)->count();

        return $page->result($q->orderByDesc('id')->offset($page->offset())->limit($page->pageSize)->get()->map(function ($u) {
            return [
                'id' => (int) $u->id,
                'nickname' => $u->nickname,
                'phone' => PhoneNumber::mask((string) ($u->phone ?? '')),
                'status' => (int) $u->status,
                'created_at' => $u->created_at,
                'grants' => MiniGrant::query()->where('user_id', $u->id)->get([
                    'id',
                    'role',
                    'resource_id',
                    'status',
                ])->toArray(),
            ];
        })->all(), $total);
    }

    public function grant(int $admin, array $input): array
    {
        $this->authorize($admin);
        Fields::only($input, [
            'user_id',
            'role',
            'resource_id',
            'status',
        ]);
        $user = Fields::id($input, 'user_id');
        $role = Fields::choice($input, 'role', Access::roles());
        $resource = Fields::id($input, 'resource_id');
        $status = Input::integer($input['status'] ?? 1, 'status', 0, 1);

        return (new MiniUser())->getConnection()->transaction(function () use ($admin, $user, $role, $resource, $status) {
            if (!MiniUser::query()->where('id', $user)->lockForUpdate()->first()) {
                throw new ApiException(40401, '小程序用户不存在', 404);
            }
            if ($status === 1 && MiniGrant::query()->where('user_id', $user)->where('status', 1)
                ->where(function ($query) use ($role, $resource) {
                    $query->where('role', '!=', $role)->orWhere('resource_id', '!=', $resource);
                })->exists()) {
                throw new ApiException(40903, '一个小程序账号只能绑定一个业务身份，请先停用原身份', 409);
            }
            $model = Access::resourceModel($role);
            if (!$model::query()->where('id', $resource)->exists()) {
                throw new ApiException(40401, '业务档案不存在', 404);
            }
            $row = MiniGrant::query()->updateOrCreate(
                [
                    'user_id' => $user,
                    'role' => $role,
                    'resource_id' => $resource,
                ],
                [
                    'status' => $status,
                    'created_by' => $admin,
                    'created_at' => date('Y-m-d H:i:s'),
                    'updated_at' => date('Y-m-d H:i:s'),
                ]
            );
            Commands::audit('admin', $admin, 'identity.grant', (int) $row->id, [
                'user_id' => $user,
                'role' => $role,
                'resource_id' => $resource,
                'status' => $status,
            ]);

            return [
                'id' => (int) $row->id,
                'status' => $status,
            ];
        });
    }
    /**
     * Binds a phone to an existing account so SMS login reaches the same user and therefore the
     * same granted identity. This never creates an account and never changes a grant.
     */
    public function bindPhone(int $admin, array $input): array
    {
        $this->authorize($admin);
        Fields::only($input, [
            'user_id',
            'phone',
        ]);
        $user = Fields::id($input, 'user_id');
        $phone = SmsLogin::mobile($input);

        return (new MiniUser())->getConnection()->transaction(function () use ($admin, $user, $phone) {
            if (!MiniUser::query()->where('id', $user)->lockForUpdate()->first()) {
                throw new ApiException(40401, '小程序用户不存在', 404);
            }
            if (MiniUser::query()->where('phone', $phone)->where('id', '!=', $user)->lockForUpdate()->exists()) {
                throw new ApiException(40903, '该手机号已绑定其他小程序账号，请先解绑', 409);
            }
            MiniUser::query()->where('id', $user)->update([
                'phone' => $phone,
                'updated_at' => date('Y-m-d H:i:s'),
            ]);
            Commands::audit('admin', $admin, 'identity.bind_phone', $user, [
                'user_id' => $user,
                'phone' => PhoneNumber::mask($phone),
            ]);

            return [
                'user_id' => $user,
                'phone' => PhoneNumber::mask($phone),
            ];
        });
    }
}