<?php

namespace App\Services\System;

use App\Models\System\SystemUserRole;
use App\Models\System\SystemRole;
use App\Models\User;
use App\Services\BaseService;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\DB;

/**
 * 系统用户角色关联服务类
 */
class SystemUserRoleService extends BaseService
{
    protected string $modelClass = SystemUserRole::class;

    /**
     * 获取用户角色关联列表
     */
    public function getList(array $params): LengthAwarePaginator
    {
        $query = SystemUserRole::query()
            ->with(['user:id,username,nickname', 'role:id,name,code']);

        // 用户筛选
        if (isset($params['user_id'])) {
            $query->where('user_id', $params['user_id']);
        }

        // 角色筛选
        if (isset($params['role_id'])) {
            $query->where('role_id', $params['role_id']);
        }

        // 排序
        $query->orderBy('user_id', 'asc')
              ->orderBy('role_id', 'asc');

        return $query->paginate($params['page_size'] ?? 15);
    }

    /**
     * 获取用户的角色列表
     */
    public function getUserRoles(int $userId): array
    {
        return SystemUserRole::where('user_id', $userId)
            ->pluck('role_id')
            ->toArray();
    }

    /**
     * 获取角色的用户列表
     */
    public function getRoleUsers(int $roleId): array
    {
        return SystemUserRole::where('role_id', $roleId)
            ->pluck('user_id')
            ->toArray();
    }

    /**
     * 设置用户角色
     */
    public function setUserRoles(int $userId, array $roleIds): bool
    {
        return DB::transaction(function () use ($userId, $roleIds) {
            // 删除现有关联
            SystemUserRole::where('user_id', $userId)->delete();

            // 批量插入新关联
            if (!empty($roleIds)) {
                $data = [];
                foreach ($roleIds as $roleId) {
                    $data[] = [
                        'user_id' => $userId,
                        'role_id' => $roleId,
                        'creator' => auth('admin')->id() ?? 0,
                        'create_time' => now(),
                        'tenant_id' => $this->getCurrentTenantId() ?? 0,
                        'deleted' => 0,
                    ];
                }
                SystemUserRole::insert($data);
            }

            return true;
        });
    }

    /**
     * 获取用户的角色详情（包含角色信息）
     */
    public function getUserRoleDetails(int $userId): array
    {
        return SystemUserRole::where('user_id', $userId)
            ->with('role:id,name,code,data_scope,status')
            ->get()
            ->pluck('role')
            ->toArray();
    }

    /**
     * 检查用户是否拥有指定角色
     */
    public function hasRole(int $userId, int $roleId): bool
    {
        return SystemUserRole::where('user_id', $userId)
            ->where('role_id', $roleId)
            ->exists();
    }

    /**
     * 检查用户是否拥有指定角色编码
     */
    public function hasRoleCode(int $userId, string $roleCode): bool
    {
        return SystemUserRole::where('user_id', $userId)
            ->whereHas('role', function ($query) use ($roleCode) {
                $query->where('code', $roleCode)->where('status', 1);
            })
            ->exists();
    }

    /**
     * 批量设置多个用户的角色
     */
    public function batchSetUserRoles(array $userRoleData): bool
    {
        return DB::transaction(function () use ($userRoleData) {
            foreach ($userRoleData as $data) {
                $this->setUserRoles($data['user_id'], $data['role_ids'] ?? []);
            }
            return true;
        });
    }

    /**
     * 为角色批量分配用户
     */
    public function setRoleUsers(int $roleId, array $userIds): bool
    {
        return DB::transaction(function () use ($roleId, $userIds) {
            // 删除现有关联
            SystemUserRole::where('role_id', $roleId)->delete();

            // 批量插入新关联
            if (!empty($userIds)) {
                $data = [];
                foreach ($userIds as $userId) {
                    $data[] = [
                        'user_id' => $userId,
                        'role_id' => $roleId,
                        'creator' => auth('admin')->id() ?? 0,
                        'create_time' => now(),
                        'tenant_id' => $this->getCurrentTenantId() ?? 0,
                        'deleted' => 0,
                    ];
                }
                SystemUserRole::insert($data);
            }

            return true;
        });
    }

    /**
     * 删除用户的所有角色
     */
    public function clearUserRoles(int $userId): bool
    {
        return SystemUserRole::where('user_id', $userId)->delete();
    }

    /**
     * 删除角色的所有用户关联
     */
    public function clearRoleUsers(int $roleId): bool
    {
        return SystemUserRole::where('role_id', $roleId)->delete();
    }

    /**
     * 获取当前租户ID
     */
    protected function getCurrentTenantId(): ?int
    {
        $user = auth('admin')->user();
        return $user ? $user->tenant_id : null;
    }
}