<?php
/**
 * API - Obtener mensajes de una conversación específica
 */

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

// Modo debug: desactivar autenticación si existe el parámetro debug
$debugMode = isset($_GET['debug']) && $_GET['debug'] === 'true';

if (!$debugMode) {
    requireAuthentication();
}

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 {
    $user_id = $_GET['user_id'] ?? null;
    
    if (!$user_id) {
        http_response_code(400);
        echo json_encode(['error' => 'user_id es requerido']);
        exit;
    }
    
    $db = Database::getInstance();
    
    // Obtener información del usuario
    $user = $db->fetch(
        "SELECT id, phone_number, name FROM users WHERE id = ?",
        [$user_id]
    );
    
    if (!$user) {
        http_response_code(404);
        echo json_encode(['error' => 'Usuario no encontrado']);
        exit;
    }
    
    // Obtener todos los mensajes de la conversación
    $conversations = $db->fetchAll(
        "SELECT 
            id,
            message_id,
            direction,
            message_type,
            content,
            media_url,
            status,
            created_at
         FROM conversations 
         WHERE user_id = ? 
         AND (
             message_type = 'text' 
             OR (message_type IN ('image', 'audio', 'video', 'document') AND media_url IS NOT NULL AND media_url != '')
         )
         ORDER BY created_at ASC",
        [$user_id]
    );
    
    // Formatear mensajes
    $conversations = array_map(function($msg) {
        return [
            'id' => intval($msg['id']),
            'message_id' => $msg['message_id'] ?? '',
            'direction' => $msg['direction'],
            'message_type' => $msg['message_type'],
            'content' => $msg['content'] ?? '',
            'media_url' => (isset($msg['media_url']) && $msg['media_url']) ? (preg_match('#^https?://#i', $msg['media_url']) ? $msg['media_url'] : ("api/get_media.php?id=" . urlencode($msg['media_url']))) : null,
            'filename' => $msg['filename'] ?? null,
            'mime_type' => $msg['mime_type'] ?? null,
            'status' => $msg['status'] ?? 'sent',
            'created_at' => $msg['created_at'],
            'time' => date('H:i', strtotime($msg['created_at'])),
            'date' => date('d/m/Y', strtotime($msg['created_at']))
        ];
    }, $conversations);
    
    // Marcar mensajes como leídos
    $db->query(
        "UPDATE conversations SET status = 'read' WHERE user_id = ? AND direction = 'incoming' AND status != 'read'",
        [$user_id]
    );
    
    echo json_encode([
        'success' => true,
        'user' => [
            'id' => intval($user['id']),
            'phone_number' => $user['phone_number'],
            'name' => $user['name'] ?? $user['phone_number']
        ],
        'conversations' => $conversations,
        'total_conversations' => count($conversations)
    ]);
    
} catch (Exception $e) {
    error_log("Error in get_conversation_detail.php: " . $e->getMessage());
    http_response_code(500);
    echo json_encode(['error' => 'Error interno del servidor: ' . $e->getMessage()]);
}
?>