#include "http_client.h"
#include "stdio.h"

#define HTTP_SOCKET     0    // 使用Socket 0

// 直接使用IP地址的HTTP GET请求
http_result http_get_ip(const uint8_t* ip, uint16_t port, const char* path, http_response* response)
{
    int32_t ret;
    char request[512];
    
    // 1. 创建socket
    if((ret = socket(HTTP_SOCKET, Sn_MR_TCP, 0, 0)) != HTTP_SOCKET)
    {
        return HTTP_ERROR_SOCKET;
    }
    
    // 2. 连接服务器
    if((ret = connect(HTTP_SOCKET, (uint8_t*)ip, port)) != SOCK_OK)
    {
        close(HTTP_SOCKET);
        return HTTP_ERROR_CONNECTION;
    }
    
    // 3. 构建并发送HTTP请求
    sprintf(request, 
            "GET %s HTTP/1.1\r\n"
            "Host: %d.%d.%d.%d\r\n"
            "Connection: close\r\n"
            "\r\n",
            path, ip[0], ip[1], ip[2], ip[3]);
            
    if(send(HTTP_SOCKET, (uint8_t*)request, strlen(request)) <= 0)
    {
        close(HTTP_SOCKET);
        return HTTP_ERROR_SEND;
    }
    
    // 4. 接收响应数据
    response->length = 0;
    while(1)
    {
        if(getSn_SR(HTTP_SOCKET) == SOCK_CLOSED) break;
        
        ret = recv(HTTP_SOCKET, 
                  &response->buffer[response->length],
                  HTTP_BUFFER_SIZE - response->length);
                  
        if(ret <= 0) break;
        response->length += ret;
        
        if(response->length >= HTTP_BUFFER_SIZE) break;
    }
    
    // 5. 关闭socket
    close(HTTP_SOCKET);
    
    if(response->length == 0)
    {
        return HTTP_ERROR_RECEIVE;
    }
    
    return HTTP_OK;
}

// URL解析函数
void parse_url(const char* url, char* host, char* path, uint16_t* port)
{
    char* p;
    
    // 跳过 "http://" 
    if(strncmp(url, "http://", 7) == 0)
        url += 7;
    
    // 复制主机名
    p = strchr(url, '/');
    if(p == NULL)
    {
        strcpy(host, url);
        strcpy(path, "/");
    }
    else
    {
        strncpy(host, url, p - url);
        host[p - url] = '\0';
        strcpy(path, p);
    }
    
    // 检查端口号
    p = strchr(host, ':');
    if(p != NULL)
    {
        *p = '\0';
        *port = atoi(p + 1);
    }
    else
    {
        *port = 80;
    }
}