110 lines
4.4 KiB
PHP
110 lines
4.4 KiB
PHP
<?php
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namespace app\common\service\ai;
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use app\common\model\ai\AiConfig;
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class AiAssistantResponder
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{
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public static function respond(AiAssistantTrace $trace): AiAssistantTrace
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{
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$messages = self::buildModelMessages($trace->historyMessages, $trace->originalMessage, $trace->plan, $trace->contextText);
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$result = self::callAssistantModel($messages);
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$trace->responseResult = $result;
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$trace->finalAnswer = !empty($result['success'])
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? trim((string) ($result['content'] ?? ''))
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: 'AI助手暂时没有生成成功，请稍后再试。';
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if ($trace->finalAnswer === '') {
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$trace->finalAnswer = '我暂时没有找到足够的站内依据，请换个关键词再问一次。';
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}
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return $trace;
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}
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private static function buildModelMessages(array $history, string $message, array $plan, string $contextText): array
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{
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$messages = [
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[
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'role' => 'system',
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'content' => AiConfig::getVal('assistant_system_prompt', self::defaultSystemPrompt()),
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],
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];
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foreach ($history as $row) {
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$role = $row['role'] === 'assistant' ? 'assistant' : 'user';
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$content = trim((string) ($row['content'] ?? ''));
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if ($content !== '') {
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$messages[] = ['role' => $role, 'content' => mb_substr($content, 0, 1000)];
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}
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}
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$planSummary = json_encode([
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'intent' => $plan['intent'] ?? '',
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'rewritten_query' => $plan['rewritten_query'] ?? '',
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'alternate_queries' => $plan['alternate_queries'] ?? [],
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'domains' => $plan['domains'] ?? [],
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'preferred_domain' => $plan['preferred_domain'] ?? '',
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'entities' => $plan['entities'] ?? [],
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'date_range' => $plan['date_range'] ?? [],
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'needs_realtime' => $plan['needs_realtime'] ?? false,
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'confidence' => $plan['confidence'] ?? 0,
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], JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
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$messages[] = [
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'role' => 'user',
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'content' => "用户问题：\n{$message}\n\n查询理解结果：\n"
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. $planSummary
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. "\n\n站内资料与实时上下文：\n"
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. ($contextText ?: '{}')
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. "\n\n请按照“直接结论、依据摘要、相关内容、风险提示”的结构回答。"
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. "如果站内资料不足，请明确说明，不要编造。彩票、赛事预测、加密行情必须提示不构成投资或购彩建议。",
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];
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return $messages;
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}
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private static function callAssistantModel(array $messages): array
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{
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$client = new DeepSeekClient();
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$optionsList = [self::defaultModelOptions()];
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$failedErrors = [];
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$lastResult = ['success' => false, 'error' => 'AI助手模型服务暂时不可用', 'tokens' => 0];
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foreach ($optionsList as $options) {
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$result = $client->chatMessages($messages, $options);
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if (!empty($result['success'])) {
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return $result;
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}
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$lastResult = $result;
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$provider = (string) ($result['provider_label'] ?? ($options['provider_label'] ?? 'AI模型'));
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$failedErrors[] = $provider . ': ' . (string) ($result['error'] ?? '调用失败');
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}
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if (!empty($failedErrors)) {
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$lastResult['error'] = implode(' | ', $failedErrors);
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}
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return $lastResult;
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}
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private static function defaultModelOptions(): array
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{
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return DeepSeekClient::defaultModelOptions([
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'max_tokens' => 1600,
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'temperature' => 0.45,
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'retry_times' => 3,
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'retry_sleep_ms' => 1200,
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]);
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}
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private static function defaultSystemPrompt(): string
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{
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return '你是世博头条 AI 助手，面向普通用户回答站内体育资讯、赛事、社区、彩票和加密行情相关问题。'
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. '必须优先依据提供的站内资料和实时上下文回答；资料不足时要直接说明不足并建议用户换关键词。'
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. '不要声称可以访问后台、源码、服务器或未提供的内部数据。'
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. '回答使用中文，结构清晰，语气专业克制。涉及赛事预测、彩票或加密行情时，必须说明仅供参考，不构成投资或购彩建议。';
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}
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}
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