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#include "tcp_socket.h"
 
/**
    @brief Handle incoming request
    @param [in] Socket to handle
**/
void handleRequest(int s) {
    string request = readString(s);
    // remove \n
    request = request.substr(0, request.size()-1);
    stringstream stream;
    size_t n;
    stream << request;
    stream >> n;
    cout << "Receved request : " << n << endl;
 
    size_t i;
    int a = 1;
    int b = 1;
    for(i = 0; i < n; ++i) {
        int temp = a + b;
        a = b;
        b = temp;
    }
 
    {
        stringstream stream;
        stream << b;
        writeString(s, stream.str() + "\n");
    }
}
 
int main(int argc, char *argv[]) {
    try {
        if(argc != 3) {
            cout << "usage: fib interface port" << endl;
            return 0;
        }
		const string interface = argv[1];
        // get port
        int port;
        stringstream str;
        str << argv[2];
        str >> port;
 
        // listen
        int s = listenTCP(port, 5, interface);
        cout << "Listing on " << interface << ":" << port << " ..." << endl;
        for(;;) {
            // accept
            sockaddr_in addr;
            size_t len = sizeof(addr);
            int client = accept(s, reinterpret_cast<sockaddr *>(&addr), &len);
            if(client == -1) {
                THROW();
            }
            cout << "A connection from " << ipAsString(addr.sin_addr.s_addr) << endl;
            handleRequest(client);
            cout << "Close connection" << endl;
            close(client);
        }
    } catch(SocketError &e) {
        e.print();
    }
    return 0;
}
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