<?php
require_once __DIR__ . '/db/config.php';

// Set a longer execution time, as this can be a long-running script.
ini_set('max_execution_time', 300); // 5 minutes

// --- Helper Functions ---

/**
 * Updates the status of a submission.
 */
function update_status($pdo, $id, $status, $message = null) {
    $sql = "UPDATE submissions SET status = ? WHERE id = ?";
    if ($message) {
        // For now, we don't have a column for error messages, but we could add one.
        // For this version, we'll just log it to the server's error log.
        error_log("Submission ID: $id, Status: $status, Message: $message");
    }
    $stmt = $pdo->prepare($sql);
    $stmt->execute([$status, $id]);
}

/**
 * A simple function to extract a domain from a URL.
 */
function get_domain($url) {
    $pieces = parse_url($url);
    if (isset($pieces['host'])) {
        return preg_replace('/^www\./', '', $pieces['host']);
    }
    return null;
}

// --- Main Worker Logic ---

$pdo = db();

// 1. Find submissions that are 'Pending' or those that have been 'Processing' for a while (e.g., > 15 mins)
// This helps recover from script crashes.
$stmt = $pdo->query("SELECT * FROM submissions WHERE status = 'Pending' OR (status = 'Processing' AND updated_at < NOW() - INTERVAL 15 MINUTE)");
$pending_submissions = $stmt->fetchAll();

if (empty($pending_submissions)) {
    // No work to do, just redirect back.
    header('Location: analyst_dashboard.php');
    exit;
}

foreach ($pending_submissions as $sub) {
    $id = $sub['id'];
    $name = $sub['name'];

    // 2. Mark as 'Processing'
    update_status($pdo, $id, 'Processing');

    // 3. Simulate fetching data (This is where the Gemini API calls will go)
    // For now, we'll use a mock implementation that just populates some data.
    try {
        // --- REAL DATA IMPLEMENTATION ---
        $linkedin_query = "{$name}" site:linkedin.com/in/;
        $twitter_query = "{$name}" site:twitter.com;
        $company_query = "{$name}" company;

        // For this example, we'll call the tool synchronously.
        // In a real-world high-volume application, you might use a job queue.
        $linkedin_results_json = shell_exec("gemini-tool google_web_search --query '{$linkedin_query}'");
        $twitter_results_json = shell_exec("gemini-tool google_web_search --query '{$twitter_query}'");
        $company_results_json = shell_exec("gemini-tool google_web_search --query '{$company_query}'");

        $linkedin_url = null;
        if ($linkedin_results_json) {
            $results = json_decode($linkedin_results_json, true);
            if (!empty($results['web_search_result']['results'])) {
                // Find the first result that looks like a profile
                foreach ($results['web_search_result']['results'] as $res) {
                    if (preg_match('/linkedin\.com\/in\//', $res['url'])) {
                        $linkedin_url = $res['url'];
                        break;
                    }
                }
            }
        }

        $twitter_url = null;
        if ($twitter_results_json) {
            $results = json_decode($twitter_results_json, true);
            if (!empty($results['web_search_result']['results'])) {
                foreach ($results['web_search_result']['results'] as $res) {
                    if (preg_match('/twitter\.com\/[^\/]+$/', $res['url'])) {
                        $twitter_url = $res['url'];
                        break;
                    }
                }
            }
        }
        
        $company = null;
        if ($company_results_json) {
            $results = json_decode($company_results_json, true);
            if (!empty($results['web_search_result']['results'])) {
                // For simplicity, we'll take the title of the first result as the company name.
                // This is a very rough heuristic and could be improved.
                $company = $results['web_search_result']['results'][0]['title'];
            }
        }

        $industry = null;
        if ($company) {
            $industry_query = ""{$company}" industry";
            $industry_results_json = shell_exec("gemini-tool google_web_search --query '{$industry_query}'");
            if ($industry_results_json) {
                $results = json_decode($industry_results_json, true);
                if (!empty($results['web_search_result']['results'])) {
                    $industry = $results['web_search_result']['results'][0]['title'];
                }
            }
        }

        $geo_location = null;
        if ($company) {
            $location_query = ""{$company}" headquarters location";
            $location_results_json = shell_exec("gemini-tool google_web_search --query '{$location_query}'");
            if ($location_results_json) {
                $results = json_decode($location_results_json, true);
                if (!empty($results['web_search_result']['results'])) {
                    $geo_location = $results['web_search_result']['results'][0]['title'];
                }
            }
        }

                $update_data = [
            'linkedin_url' => $linkedin_url,
            'twitter_url' => $twitter_url,
            'company' => $company,
            'industry' => $industry,
            'geo_location' => $geo_location,
            'status' => 'Completed'
        ];

        $sql_parts = [];
        foreach ($update_data as $key => $value) {
            $sql_parts[] = "`$key` = :$key";
        }
        $sql = "UPDATE submissions SET " . implode(', ', $sql_parts) . " WHERE id = :id";

        $stmt = $pdo->prepare($sql);
        $update_data['id'] = $id;
        $stmt->execute($update_data);

    } catch (Exception $e) {
        // If something goes wrong, mark as 'Error'
        update_status($pdo, $id, 'Error', $e->getMessage());
    }
}

// 4. Redirect back to the dashboard
header('Location: analyst_dashboard.php?refreshed=all');
exit;