<?php
/**
 * WEVAL Skill Factory — Create, list, search skills for DeerFlow
 * POST: action=create&name=X&description=Y&triggers=Z&code=W
 * GET:  action=list|search|get&q=X
 */
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

$SKILLS_DIR = '/opt/deer-flow/skills/weval';
if (!is_dir($SKILLS_DIR)) @mkdir($SKILLS_DIR, 0755, true);

$action = $_GET['action'] ?? $_POST['action'] ?? 'list';

switch ($action) {
    case 'list':
        $skills = [];
        foreach (glob("$SKILLS_DIR/*/SKILL.md") as $f) {
            $dir = basename(dirname($f));
            $content = file_get_contents($f);
            preg_match('/^# (.+)/m', $content, $m);
            $skills[] = [
                'id' => $dir,
                'name' => $m[1] ?? $dir,
                'size' => strlen($content),
                'has_code' => strpos($content, '```python') !== false
            ];
        }
        // Also scan other dirs
        foreach (glob("/opt/deer-flow/skills/*/SKILL.md") as $f) {
            $dir = basename(dirname($f));
            if (in_array($dir, ['weval','public'])) continue;
            $content = file_get_contents($f);
            preg_match('/^# (.+)/m', $content, $m);
            $skills[] = ['id' => $dir, 'name' => $m[1] ?? $dir, 'size' => strlen($content), 'source' => 'core'];
        }
        // Public skills
        foreach (glob("/opt/deer-flow/skills/public/*/SKILL.md") as $f) {
            $dir = basename(dirname($f));
            $content = file_get_contents($f);
            preg_match('/^# (.+)/m', $content, $m);
            $skills[] = ['id' => $dir, 'name' => $m[1] ?? $dir, 'size' => strlen($content), 'source' => 'public'];
        }
        echo json_encode(['ok' => true, 'count' => count($skills), 'skills' => $skills]);
        break;

    case 'search':
        $q = strtolower($_GET['q'] ?? '');
        if (!$q) { echo json_encode(['error' => 'missing q']); break; }
        $results = [];
        foreach (glob("/opt/deer-flow/skills/{weval,public,aegis,aios,skillsmith}/*/SKILL.md", GLOB_BRACE) as $f) {
            $content = file_get_contents($f);
            if (stripos($content, $q) !== false) {
                $dir = basename(dirname($f));
                preg_match('/^# (.+)/m', $content, $m);
                $results[] = ['id' => $dir, 'name' => $m[1] ?? $dir, 'match' => substr($content, max(0, stripos($content, $q)-50), 150)];
            }
        }
        echo json_encode(['ok' => true, 'query' => $q, 'results' => $results]);
        break;

    case 'get':
        $id = preg_replace('/[^a-z0-9_-]/', '', $_GET['id'] ?? '');
        $found = false;
        foreach (["/opt/deer-flow/skills/weval/$id/SKILL.md", "/opt/deer-flow/skills/public/$id/SKILL.md",
                  "/opt/deer-flow/skills/$id/SKILL.md"] as $path) {
            if (file_exists($path)) {
                echo json_encode(['ok' => true, 'id' => $id, 'content' => file_get_contents($path)]);
                $found = true; break;
            }
        }
        if (!$found) echo json_encode(['error' => 'not found', 'id' => $id]);
        break;

    case 'create':
        $name = trim($_POST['name'] ?? '');
        $desc = trim($_POST['description'] ?? '');
        $triggers = trim($_POST['triggers'] ?? '');
        $code = trim($_POST['code'] ?? '');
        
        if (!$name) { echo json_encode(['error' => 'missing name']); break; }
        
        $id = preg_replace('/[^a-z0-9-]/', '-', strtolower($name));
        $id = preg_replace('/-+/', '-', trim($id, '-'));
        $dir = "$SKILLS_DIR/$id";
        
        if (is_dir($dir)) { echo json_encode(['error' => 'skill already exists', 'id' => $id]); break; }
        
        @mkdir($dir, 0755, true);
        
        $md = "# $name\n\n## Description\n$desc\n";
        if ($triggers) {
            $md .= "\n## Triggers\n";
            foreach (explode("\n", $triggers) as $t) {
                $t = trim($t);
                if ($t) $md .= "- \"$t\"\n";
            }
        }
        if ($code) {
            $md .= "\n## Execution\n```python\n$code\n```\n";
        }
        $md .= "\n## Created\n- Date: " . date('Y-m-d H:i') . "\n- Source: WEVAL Skill Factory\n";
        
        file_put_contents("$dir/SKILL.md", $md);
        
        // Also create executable if code provided
        if ($code) {
            file_put_contents("$dir/run.py", "#!/usr/bin/env python3\n$code\n\nif __name__=='__main__':\n    import sys,json\n    print(json.dumps(execute(*sys.argv[1:])))\n");
            chmod("$dir/run.py", 0755);
        }
        
        echo json_encode(['ok' => true, 'id' => $id, 'path' => "$dir/SKILL.md", 'has_code' => !empty($code)]);
        break;

    case 'delete':
        $id = preg_replace('/[^a-z0-9_-]/', '', $_POST['id'] ?? '');
        $dir = "$SKILLS_DIR/$id";
        if (is_dir($dir)) {
            array_map('unlink', glob("$dir/*"));
            rmdir($dir);
            echo json_encode(['ok' => true, 'deleted' => $id]);
        } else {
            echo json_encode(['error' => 'not found']);
        }
        break;

    case 'stats':
        $total = 0; $with_code = 0; $categories = [];
        foreach (glob("/opt/deer-flow/skills/{weval,public,aegis,aios,skillsmith}/*/SKILL.md", GLOB_BRACE) as $f) {
            $total++;
            $c = file_get_contents($f);
            if (strpos($c, '```python') !== false) $with_code++;
            $parent = basename(dirname(dirname($f)));
            $categories[$parent] = ($categories[$parent] ?? 0) + 1;
        }
        echo json_encode(['ok' => true, 'total' => $total, 'with_code' => $with_code, 'categories' => $categories]);
        break;

    default:
        echo json_encode(['error' => 'unknown action', 'actions' => ['list','search','get','create','delete','stats']]);
}