<?php

/**
 * 文件功能：用户中心与管理控制器
 * 接管原版 USERinfo.ASP, USERSET.ASP, chpasswd.asp, KILLUSER.ASP, LOCKIP.ASP
 *
 * 权限等级通过 sysparam 表动态配置：
 *   level_kick    - 踢人所需等级
 *   level_mute    - 禁言所需等级
 *   level_ban     - 封号所需等级
 *   level_banip   - 封IP所需等级
 *
 * @author   ChatRoom Laravel
 *
 * @version  1.1.0
 */

namespace App\Http\Controllers;

use App\Events\UserKicked;
use App\Events\UserMuted;
use App\Http\Requests\ChangePasswordRequest;
use App\Http\Requests\UpdateProfileRequest;
use App\Models\Room;
use App\Models\Sysparam;
use App\Models\User;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Redis;

use Stevebauman\Location\Facades\Location;

class UserController extends Controller
{
    /**
     * 查看其他用户资料片 (对应 USERinfo.ASP)
     */
    public function show(string $username): JsonResponse
    {
        $targetUser = User::where('username', $username)->firstOrFail();
        $operator = Auth::user();

        // 基础公开信息
        $data = [
            'username' => $targetUser->username,
            'sex' => $targetUser->sex,
            'headface' => $targetUser->headface,
            'usersf' => $targetUser->usersf,
            'user_level' => $targetUser->user_level,
            'qianming' => $targetUser->qianming,
            'sign' => $targetUser->sign ?? '这个人很懒，什么都没留下。',
            'created_at' => $targetUser->created_at->format('Y-m-d'),
        ];

        // 只有等级不低于对方，或者自己看自己时，才能看到详细的财富、经验资产
        if ($operator && ($operator->user_level >= $targetUser->user_level || $operator->id === $targetUser->id)) {
            $data['exp_num'] = $targetUser->exp_num ?? 0;
            $data['jjb'] = $targetUser->jjb ?? 0;
            $data['meili'] = $targetUser->meili ?? 0;
        }

        // 拥有封禁IP（level_banip）或踢人以上权限的管理，可以查看IP和归属地
        $levelBanIp = (int) Sysparam::getValue('level_banip', '15');
        if ($operator && $operator->user_level >= $levelBanIp) {
            $data['last_ip'] = $targetUser->last_ip;
            $data['login_ip'] = $targetUser->login_ip; // 假设表中存在 login_ip 记录本次IP，若无则使用 last_ip 退化

            // 解析归属地 (防崩溃处理：检查服务提供者是否已安装)
            $ipToLookup = $targetUser->login_ip ?: $targetUser->last_ip;
            if ($ipToLookup) {
                if (class_exists('\Stevebauman\Location\Facades\Location')) {
                    try {
                        $position = Location::get($ipToLookup);
                        if ($position) {
                            $data['location'] = ($position->countryName === '中国' || $position->countryName === 'Local') ?
                                trim(($position->regionName ?? '') . ' ' . ($position->cityName ?? '')) :
                                ($position->countryName ?? '未知区域');
                            
                            if (empty($data['location'])) {
                                $data['location'] = '未知区域';
                            }
                        } else {
                            $data['location'] = '未知区域';
                        }
                    } catch (\Exception $e) {
                        $data['location'] = '解析失败';
                    }
                } else {
                    $data['location'] = '未安装IP库';
                }
            } else {
                $data['location'] = '暂无记录';
            }
        }

        return response()->json([
            'status' => 'success',
            'data' => $data,
        ]);
    }

    /**
     * 修改个人资料 (对应 USERSET.ASP)
     */
    public function updateProfile(UpdateProfileRequest $request): JsonResponse
    {
        $user = Auth::user();
        $data = $request->validated();
        
        // 当用户试图更新邮箱，并且新邮箱不等于当前旧邮箱时启动验证码拦截
        if (isset($data['email']) && $data['email'] !== $user->email) {
            // 首先判断系统开关是否开启，没开启直接禁止修改邮箱
            if (\App\Models\SysParam::where('alias', 'smtp_enabled')->value('body') !== '1') {
                return response()->json(['status' => 'error', 'message' => '系统未开启邮件服务，当前禁止绑定/修改邮箱。'], 403);
            }

            $emailCode = $request->input('email_code');
            if (empty($emailCode)) {
                return response()->json(['status' => 'error', 'message' => '新邮箱需要验证码，请先获取并填写验证码。'], 422);
            }

            // 获取缓存的验证码
            $codeKey = 'email_verify_code_' . $user->id . '_' . $data['email'];
            $cachedCode = \Illuminate\Support\Facades\Cache::get($codeKey);

            if (!$cachedCode || $cachedCode != $emailCode) {
                return response()->json(['status' => 'error', 'message' => '验证码不正确或已过期（有效期5分钟），请重新获取。'], 422);
            }

            // 验证成功后，立即核销该验证码防止二次利用
            \Illuminate\Support\Facades\Cache::forget($codeKey);
        }

        $user->update($data);

        return response()->json(['status' => 'success', 'message' => '资料更新成功。']);
    }

    /**
     * 修改密码 (对应 chpasswd.asp)
     */
    public function changePassword(ChangePasswordRequest $request): JsonResponse
    {
        $user = Auth::user();
        $oldPasswordInput = $request->input('old_password');

        // 双模式密码校验逻辑（沿用 AuthController 中策略）
        $isOldPasswordCorrect = false;

        // 优先验证 Bcrypt
        if (Hash::check($oldPasswordInput, $user->password)) {
            $isOldPasswordCorrect = true;
        }
        // 降级验证旧版 MD5
        elseif (md5($oldPasswordInput) === $user->password) {
            $isOldPasswordCorrect = true;
        }

        if (! $isOldPasswordCorrect) {
            return response()->json(['status' => 'error', 'message' => '当前密码输入不正确。'], 422);
        }

        // 验证通过，覆盖为新的 Bcrypt 加密串
        $user->password = Hash::make($request->input('new_password'));
        $user->save();

        return response()->json(['status' => 'success', 'message' => '密码已成功修改。下次请使用新密码登录。']);
    }

    /**
     * 通用权限校验：检查操作者是否有权操作目标用户
     *
     * @param  object  $operator  操作者
     * @param  string  $targetUsername  目标用户名
     * @param  int  $roomId  房间ID
     * @param  string  $levelKey  sysparam中的等级键名（如 level_kick）
     * @param  string  $actionName  操作名称（用于错误提示）
     * @return array{room: Room, target: User}|JsonResponse
     */
    private function checkPermission(object $operator, string $targetUsername, int $roomId, string $levelKey, string $actionName): array|JsonResponse
    {
        $room = Room::findOrFail($roomId);
        $requiredLevel = (int) Sysparam::getValue($levelKey, '15');

        // 鉴权：操作者要是房间房主或达到所需等级
        if ($room->master !== $operator->username && $operator->user_level < $requiredLevel) {
            return response()->json(['status' => 'error', 'message' => "权限不足（需要{$requiredLevel}级），无法执行{$actionName}操作。"], 403);
        }

        $targetUser = User::where('username', $targetUsername)->first();
        if (! $targetUser) {
            return response()->json(['status' => 'error', 'message' => '目标用户不存在。'], 404);
        }

        // 防误伤：不能操作等级 >= 自己的人
        if ($targetUser->user_level >= $operator->user_level) {
            return response()->json(['status' => 'error', 'message' => "权限不足，无法对同级或高级用户执行{$actionName}。"], 403);
        }

        return ['room' => $room, 'target' => $targetUser];
    }

    /**
     * 踢出房间 (对应 KILLUSER.ASP)
     * 所需等级由 sysparam level_kick 配置
     */
    public function kick(Request $request, string $username): JsonResponse
    {
        $operator = Auth::user();
        $roomId = $request->input('room_id');

        if (! $roomId) {
            return response()->json(['status' => 'error', 'message' => '缺少房间参数。'], 422);
        }

        $result = $this->checkPermission($operator, $username, $roomId, 'level_kick', '踢出');
        if ($result instanceof JsonResponse) {
            return $result;
        }

        // 广播踢出事件
        broadcast(new UserKicked($roomId, $result['target']->username, "管理员 [{$operator->username}] 将 [{$result['target']->username}] 踢出了聊天室。"));

        return response()->json(['status' => 'success', 'message' => "已成功将 {$result['target']->username} 踢出房间。"]);
    }

    /**
     * 禁言 (对应原版限制功能)
     * 所需等级由 sysparam level_mute 配置
     * 禁言信息存入 Redis，TTL 到期自动解除
     */
    public function mute(Request $request, string $username): JsonResponse
    {
        $operator = Auth::user();
        $roomId = $request->input('room_id');
        $duration = (int) $request->input('duration', 5);

        if (! $roomId) {
            return response()->json(['status' => 'error', 'message' => '缺少房间参数。'], 422);
        }

        $result = $this->checkPermission($operator, $username, $roomId, 'level_mute', '禁言');
        if ($result instanceof JsonResponse) {
            return $result;
        }

        // 写入 Redis 禁言标记，TTL = 禁言分钟数 * 60
        Redis::setex("mute:{$roomId}:{$username}", $duration * 60, json_encode([
            'operator' => $operator->username,
            'reason' => '管理员禁言',
            'until' => now()->addMinutes($duration)->toDateTimeString(),
        ]));

        // 广播禁言事件
        broadcast(new UserMuted($roomId, $username, $duration));

        return response()->json(['status' => 'success', 'message' => "已对 {$username} 实施禁言 {$duration} 分钟。"]);
    }

    /**
     * 封号（禁止登录）
     * 所需等级由 sysparam level_ban 配置
     * 将用户等级设为 -1 表示封禁
     */
    public function ban(Request $request, string $username): JsonResponse
    {
        $operator = Auth::user();
        $roomId = $request->input('room_id');

        if (! $roomId) {
            return response()->json(['status' => 'error', 'message' => '缺少房间参数。'], 422);
        }

        $result = $this->checkPermission($operator, $username, $roomId, 'level_ban', '封号');
        if ($result instanceof JsonResponse) {
            return $result;
        }

        // 封号：设置等级为 -1
        $result['target']->user_level = -1;
        $result['target']->save();

        // 踢出聊天室
        broadcast(new UserKicked($roomId, $username, "管理员 [{$operator->username}] 已封禁用户 [{$username}] 的账号。"));

        return response()->json(['status' => 'success', 'message' => "用户 {$username} 已被封号。"]);
    }

    /**
     * 封IP（记录IP到黑名单并踢出）
     * 所需等级由 sysparam level_banip 配置
     */
    public function banIp(Request $request, string $username): JsonResponse
    {
        $operator = Auth::user();
        $roomId = $request->input('room_id');

        if (! $roomId) {
            return response()->json(['status' => 'error', 'message' => '缺少房间参数。'], 422);
        }

        $result = $this->checkPermission($operator, $username, $roomId, 'level_banip', '封IP');
        if ($result instanceof JsonResponse) {
            return $result;
        }

        $targetIp = $result['target']->last_ip;

        if ($targetIp) {
            // 将IP加入 Redis 黑名单（永久）
            Redis::sadd('banned_ips', $targetIp);
        }

        // 同时封号
        $result['target']->user_level = -1;
        $result['target']->save();

        // 踢出聊天室
        broadcast(new UserKicked($roomId, $username, "管理员 [{$operator->username}] 已封禁用户 [{$username}] 的IP地址。"));

        $ipInfo = $targetIp ? "（IP: {$targetIp}）" : '（未记录IP）';

        return response()->json(['status' => 'success', 'message' => "用户 {$username} 已被封号并封IP{$ipInfo}。"]);
    }
}