<?php

declare(strict_types=1);

namespace app\common\service {
    function config(string $name): array
    {
        return $GLOBALS['clinicalChatConfig'];
    }

    function curl_init(): \stdClass
    {
        return new \stdClass();
    }

    function curl_setopt(\stdClass $handle, int $option, mixed $value): bool
    {
        $handle->options[$option] = $value;
        return true;
    }

    function curl_exec(\stdClass $handle): string|bool
    {
        $GLOBALS['clinicalChatPayloads'][] = json_decode($handle->options[CURLOPT_POSTFIELDS], true);
        if (isset($handle->options[CURLOPT_WRITEFUNCTION])) {
            $write = $handle->options[CURLOPT_WRITEFUNCTION];
            $write($handle, "data: {\"choices\":[{\"delta\":{\"content\":\"offline stream\"}}]}\n\n");
            return true;
        }
        return '{"choices":[{"message":{"content":"offline reply"}}]}';
    }

    function curl_errno(\stdClass $handle): int { return 0; }
    function curl_error(\stdClass $handle): string { return ''; }
    function curl_getinfo(\stdClass $handle, int $option): int { return 200; }
    function curl_close(\stdClass $handle): void {}
}

namespace {
    require dirname(__DIR__) . '/vendor/autoload.php';

    use app\common\service\AiChatService;
    use app\common\service\NihaixiaClinicalSkill;

    function chatSkillExpect(bool $condition, string $message): void
    {
        if (!$condition) {
            fwrite(STDERR, "FAIL: {$message}\n");
            exit(1);
        }
    }

    $clinicalChatConfig = [
        'enable' => true,
        'api_key' => 'offline-fixture',
        'base_url' => 'https://ai.example.test',
        'model' => 'offline-model',
    ];
    $clinicalChatPayloads = [];
    $messages = [
        ['role' => 'system', 'content' => '只输出 JSON'],
        ['role' => 'user', 'content' => '分析该患者症状'],
    ];

    $blocking = AiChatService::chat($messages);
    chatSkillExpect($blocking['ok'] === true, 'blocking chat succeeds offline');
    $deltas = [];
    $streaming = AiChatService::streamChat($messages, static function (string $delta) use (&$deltas): void {
        $deltas[] = $delta;
    });
    chatSkillExpect($streaming['ok'] === true && $deltas === ['offline stream'], 'streaming chat succeeds offline');
    chatSkillExpect(count($clinicalChatPayloads) === 2, 'both transports sent one request');
    foreach ($clinicalChatPayloads as $payload) {
        $wireMessages = $payload['messages'];
        chatSkillExpect(str_contains($wireMessages[0]['content'], NihaixiaClinicalSkill::VERSION), 'wire request includes the clinical skill');
        chatSkillExpect($wireMessages[1] === $messages[0] && $wireMessages[2] === $messages[1], 'original format and patient question are preserved');
    }

    echo "AiChat clinical skill transport contract passed.\n";
}