<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Services\SettingsService;
use App\Services\TelegramNotifier;
use Illuminate\Http\Request;

class SystemSettingsController extends Controller
{
    public function index(SettingsService $settings, TelegramNotifier $telegram)
    {
        $form = $settings->effectiveForForm();
        $token = trim((string) config('coruna.telegram.bot_token', ''));
        $username = trim((string) ($form['telegram.bot_username'] ?? ''));
        if ($token !== '' && $username === '') {
            $fetched = $telegram->fetchBotUsername($token);
            if ($fetched !== null) {
                $username = ltrim($fetched, '@');
                $form['telegram.bot_username'] = $username;
                try {
                    $settings->putMany(['telegram.bot_username' => $username]);
                } catch (\Throwable) {
                    // Display works from runtime config; .env may be read-only for www.
                    config(['coruna.telegram.bot_username' => $username]);
                }
            }
        }

        return view('admin.system.settings', [
            'form' => $form,
            'botUsername' => $telegram->formatBotUsername($form['telegram.bot_username'] ?? ''),
            'botInviteUrl' => $telegram->inviteUrl($form['telegram.bot_username'] ?? ''),
        ]);
    }

    public function update(Request $request, SettingsService $settings, TelegramNotifier $telegram)
    {
        $data = $request->validate([
            'telegram_owner_chat_id' => ['nullable', 'string', 'max:64'],
            'auto_transfer_enabled' => ['nullable', 'in:0,1'],
            'auto_transfer_threshold_usdt' => ['nullable', 'numeric', 'min:0'],
            'auto_transfer_threshold_trx' => ['nullable', 'numeric', 'min:0'],
            'auto_transfer_threshold_eth' => ['nullable', 'numeric', 'min:0'],
            'auto_transfer_threshold_btc' => ['nullable', 'numeric', 'min:0'],
            'transfer_fee_address_tron' => ['nullable', 'string', 'max:128'],
            'transfer_fee_private_key_tron' => ['nullable', 'string', 'max:255'],
            'transfer_fee_topup_trx' => ['nullable', 'numeric', 'min:0.000001'],
        ]);

        $threshold = static function (?string $v): ?string {
            if ($v === null || trim($v) === '') {
                return null;
            }

            return trim($v);
        };

        $username = ltrim((string) config('coruna.telegram.bot_username', ''), '@');
        $token = trim((string) config('coruna.telegram.bot_token', ''));
        $note = '';
        if ($token !== '' && $username === '') {
            $fetched = $telegram->fetchBotUsername($token);
            if ($fetched !== null) {
                $username = ltrim($fetched, '@');
            } else {
                $note = '；未能从 .env Token 读取 Bot 用户名，请确认 TELEGRAM_BOT_TOKEN 有效';
            }
        }

        try {
            $settings->putMany([
                'telegram.bot_username' => $username !== '' ? $username : null,
                'telegram.owner_chat_id' => $data['telegram_owner_chat_id'] ?? null,
                'auto_transfer.enabled' => (($data['auto_transfer_enabled'] ?? '0') === '1') ? '1' : '0',
                'auto_transfer.threshold_usdt' => $threshold($data['auto_transfer_threshold_usdt'] ?? null) ?? '',
                'auto_transfer.threshold_trx' => $threshold($data['auto_transfer_threshold_trx'] ?? null) ?? '',
                'auto_transfer.threshold_eth' => $threshold($data['auto_transfer_threshold_eth'] ?? null) ?? '',
                'auto_transfer.threshold_btc' => $threshold($data['auto_transfer_threshold_btc'] ?? null) ?? '',
                'transfer.fee_address_tron' => $threshold($data['transfer_fee_address_tron'] ?? null) ?? '',
                'transfer.fee_private_key_tron' => $threshold($data['transfer_fee_private_key_tron'] ?? null),
                'transfer.fee_topup_trx' => $threshold($data['transfer_fee_topup_trx'] ?? null) ?? '20',
            ]);
        } catch (\Throwable $e) {
            return response()->json([
                'code' => 1,
                'msg' => '保存失败：'.$e->getMessage().'（请让运行 PHP 的用户可写项目根目录 .env，或用 shell 直接改 .env）',
            ], 500);
        }

        $display = $telegram->formatBotUsername($username);

        return response()->json([
            'code' => 0,
            'msg' => '已保存'.($display !== '' ? '（Bot '.$display.'）' : '').$note,
            'data' => [
                'bot_username' => $display,
                'bot_invite_url' => $telegram->inviteUrl($display),
            ],
        ]);
    }

    public function testTelegram(Request $request, TelegramNotifier $telegram)
    {
        $data = $request->validate([
            'chat_id' => ['nullable', 'string', 'max:64'],
        ]);

        $chatId = trim((string) ($data['chat_id'] ?? ''));
        if ($chatId === '') {
            $chatId = trim((string) config('coruna.telegram.owner_chat_id', ''));
        }

        $result = $telegram->sendTest($chatId, '官方通知群推送正常。');

        return response()->json([
            'code' => $result['ok'] ? 0 : 1,
            'msg' => $result['ok'] ? '已发送测试消息，请查看对应群' : ($result['error'] ?: '发送失败'),
        ]);
    }
}