#include <iostream>
#include <string>
#include <cerrno>
#include <cstring>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "Log.hpp"
#include <assert.h>
#include <signal.h>
#include <sys/wait.h>
#include "Thread.hpp"
#include <vector>
#include <memory>
#include "ThreadPool.hpp"
#include "Task.hpp"
#define NUM 1024

static void service(int service_sockfd, std::string client_ip, uint16_t client_port, const std::string &name)
{
    char buffer[NUM]; // 以字符串作为缓冲区
    while (1)
    {
        // 读取缓冲区内容
        ssize_t s = read(service_sockfd, buffer, sizeof(buffer) - 1);
        if (s > 0) // 读取成功
        {
            buffer[s] = '\0'; // 标记数据的末尾
            std::cout << name << ": "; // 显示线程编号
            std::cout << "IP[" << client_ip << "], PORT[" << client_port << "]: " << buffer << std::endl;
        }
        else if (s == 0) // 无数据
        {
            logMessage(NORMAL, "%s: IP[%s], PORT[%u] shut down...me too", name.c_str(), client_ip.c_str(), client_port);
            break;
        }
        else // 读取失败
        {
            logMessage(ERROR, "read socket error...%d:%s", errno, strerror(errno));
            break;
        }
        // 写入数据
        write(service_sockfd, buffer, strlen(buffer));
    }
    close(service_sockfd);
}

class TcpServer
{
public:
    // 线程函数
    static void *routine(void *args)
    {
        ThreadData *tdata = static_cast<ThreadData *>(args);
        service(tdata->_sockfd, tdata->_ip, tdata->_port, tdata->_name);

        pthread_detach(pthread_self());
        delete tdata;
        return nullptr;
    }

private:
    const static int _backlog = 20;

public:
    TcpServer(uint16_t port, std::string ip = "")
        : _port(port)
        , _ip(ip)
        , _listen_sockfd(-1)
        , _threadpool_ptr(ThreadPool<Task>::getThreadPool())
    {}
    ~TcpServer()
    {
        if (_listen_sockfd >= 0)
            close(_listen_sockfd);
    }
    bool initServer()
    {
        // 1. 创建套接字
        _listen_sockfd = socket(AF_INET, SOCK_STREAM, 0);
        if (_listen_sockfd < 0)
        {
            logMessage(FATAL, "%d:%s", errno, strerror(errno));
            exit(2);
        }
        logMessage(DEBUG, "%s: %d", "create socket success, sockfd", _listen_sockfd);

        // 2. 绑定
        // 2.1 填充属性
        struct sockaddr_in local;
        memset(&local, 0, sizeof(local));
        local.sin_family = AF_INET;    // 网络传输
        local.sin_port = htons(_port); // 本地->网络
        local.sin_addr.s_addr = _ip.empty() ? INADDR_ANY : inet_addr(_ip.c_str());

        // 2.2 绑定
        if (bind(_listen_sockfd, (struct sockaddr *)&local, sizeof(local)) < 0)
        {
            logMessage(FATAL, "bind():errno:%d:%s", errno, strerror(errno));
            exit(3);
        }

        // 3. 监听
        if (listen(_listen_sockfd, _backlog) < 0)
        {
            logMessage(FATAL, "listen()errno:%d:%s", errno, strerror(errno));
            exit(4);
        }

        logMessage(NORMAL, "initialize tdp server...%s", strerror(errno));
        return true;
    }
    void start()
    {
        _threadpool_ptr->run(); // 线程池执行任务
        while (1)
        {
            // 4.1 获取链接
            struct sockaddr_in client;
            memset(&client, 0, sizeof(client));
            socklen_t len = sizeof(client);
            int service_sockfd = accept(_listen_sockfd, (struct sockaddr *)&client, &len);
            // 获取连接失败
            if (service_sockfd < 0)
            {
                logMessage(ERROR, "accept()errno:%d:%s", errno, strerror(errno));
                continue; // 继续
            }
            // 获取连接成功
            // 通信准备 (网络->主机)
            uint16_t client_port = ntohs(client.sin_port);
            std::string client_ip = inet_ntoa(client.sin_addr);
            logMessage(NORMAL, "link success, IP[%s], PORT[%u], server sock: %d\n",
                       client_ip.c_str(), client_port, service_sockfd);

            // 线程池版本
            Task task(service_sockfd, client_ip, client_port, service); // 生产任务
            _threadpool_ptr->pushTask(task); // push任务
        }
    }

private:
    int _listen_sockfd;                                // 监听套接字
    int16_t _port;                                     // 端口号
    std::string _ip;                                   // IP地址
    std::unique_ptr<ThreadPool<Task>> _threadpool_ptr; // 指向线程池对象的地址
};