#!/usr/bin/php
<?php
// Reads settings.json (if present) and prints extra llama.cpp flags.
// Supports both OpenAI-style and llama.cpp-style names.
// Example settings.json:
// {
//   "flags": {
//     "temperature": 0.7,
//     "max_output_tokens": 256,
//     "top_p": 0.9,
//     "repeat_penalty": 1.1,
//     "seed": 42,
//     "mirostat": 2
//   },
//   "raw": ["--no-penalize-nl"]
// }

$path = __DIR__ . '/settings.json';
if (!file_exists($path)) {
    // No settings file -> no extra flags
    exit(0);
}

$json = json_decode(file_get_contents($path), true);
if (!is_array($json)) {
    fwrite(STDERR, "settings.json is not valid JSON\n");
    exit(0);
}

$flags = isset($json['flags']) && is_array($json['flags']) ? $json['flags'] : [];
$raw   = isset($json['raw']) && is_array($json['raw']) ? $json['raw'] : [];

// Normalize keys: strip leading dashes, kebab→snake, lowercase
$norm = function(string $k): string {
    $k = ltrim($k, '-');
    $k = strtolower(str_replace('-', '_', $k));
    return $k;
};

// Map high-level keys to llama.cpp flags.
// Add more as needed.
$map = [
    'temperature'       => '--temp',
    'temp'              => '--temp',
    'max_output_tokens' => '-n',
    'n_predict'         => '-n',
    'top_p'             => '--top-p',
    'top_k'             => '--top-k',
    'repeat_penalty'    => '--repeat-penalty',
    'presence_penalty'  => '--presence-penalty',
    'frequency_penalty' => '--frequency-penalty',
    'seed'              => '--seed',
    'ctx'               => '-c',
    'context_size'      => '-c',
    'mirostat'          => '--mirostat',
    'mirostat_tau'      => '--mirostat-tau',
    'mirostat_eta'      => '--mirostat-eta',
];

$out = [];

// Structured flags
foreach ($flags as $key => $val) {
    $k = $norm($key);
    if (!isset($map[$k])) {
        // Unknown key: ignore silently (or push to raw if you prefer)
        continue;
    }
    $flag = $map[$k];

    // Boolean flags: include only when true
    if (is_bool($val)) {
        if ($val) $out[] = $flag;
        continue;
    }

    // Everything else: flag + value
    // Use escapeshellarg for safety
    $out[] = $flag . ' ' . escapeshellarg((string)$val);
}

// Raw passthrough flags (assumed already valid for llama.cpp)
foreach ($raw as $r) {
    if (is_string($r) && strlen(trim($r)) > 0) {
        $out[] = $r;
    }
}

// Print as a single line for easy inclusion in Makefile pipeline
echo implode(' ', $out);