<?php
/**
 * API - Obtener conversaciones recientes
 * Fecha: 4 de enero de 2026
 */

require_once '../config/config.php';

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET');
header('Access-Control-Allow-Headers: Content-Type');

try {
    $db = Database::getInstance();
    
    // Obtener conversaciones de la tabla conversations
    $conversations = $db->fetchAll(
        "SELECT 
            c.id,
            c.user_id,
            COALESCE(c.content, '') as content,
            c.direction,
            c.message_type,
            c.status,
            c.created_at,
            u.phone_number,
            COALESCE(u.name, u.phone_number) as name
         FROM conversations c
         JOIN users u ON c.user_id = u.id
         ORDER BY c.created_at DESC
         LIMIT 500"
    );
    
    // Si no hay datos, retornar array vacío
    if (empty($conversations)) {
        $conversations = [];
    }
    
    // Formatear datos para el frontend
    $conversations = array_map(function($conv) {
        return [
            'id' => intval($conv['id']),
            'user_id' => intval($conv['user_id']),
            'content' => $conv['content'] ?? '',
            'direction' => $conv['direction'] ?? 'incoming',
            'message_type' => $conv['message_type'] ?? 'text',
            'status' => $conv['status'] ?? 'sent',
            'created_at' => $conv['created_at'],
            'phone_number' => $conv['phone_number'],
            'name' => $conv['name'] ?? $conv['phone_number']
        ];
    }, $conversations);
    
    echo json_encode($conversations);
    
} catch (Exception $e) {
    error_log("Error in get_conversations.php: " . $e->getMessage());
    http_response_code(500);
    echo json_encode(['error' => 'Error interno del servidor: ' . $e->getMessage()]);
}
?>