#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>

#include <ecp/core.h>
#include <ecp/dir/dir.h>
#include <ecp/dir/dir_client.h>
#include <ecp/vconn/vconn.h>

#include <util.h>

#include "init_vconn.h"

ECPContext ctx;
ECPSocket sock;
ECPConnHandler handler;
ECPConnHandler vconn_handler;
ECPConnHandler vlink_handler;
ECPConnHandler dir_handler;
ECPConnection dir_conn;
ECPConnection conn;
ECPVConnOutb vconn[ECP_MAX_PARENT];
ecp_ecdh_public_t srv_public;

#define CTYPE_TEST  0
#define MTYPE_MSG   0

static int handle_open(ECPConnection *conn, ECP2Buffer *b) {
    char *_msg = "PERA JE CAR!";
    ssize_t rv;

    printf("Press ENTER key to start\n");
    while(getchar()!='\n');

    rv = ecp_msg_send(conn, MTYPE_MSG, (unsigned char *)_msg, strlen(_msg)+1);

    return ECP_OK;
}

static ssize_t handle_msg(ECPConnection *conn, ecp_seq_t seq, unsigned char mtype, unsigned char *msg, size_t msg_size, ECP2Buffer *b) {
    printf("MSG:%s size:%ld\n", msg, msg_size);

    return msg_size;
}

static void handle_dir_list(ECPSocket *sock, ECPDirList *dir_list, int err) {
    ecp_tr_addr_t addr;
    ecp_ecdh_public_t vconn_pub[ECP_MAX_PARENT];
    ssize_t _rv, vconn_size;
    int rv;

    LOG("handle_dir_list", err);

    _rv = ecp_dir_hrw_select(dir_list, &srv_public, vconn_pub, ECP_MAX_PARENT, &addr);
    LOG("ecp_dir_hrw_select", (int)_rv);

    vconn_size = _rv;
    ecp_conn_init(&conn, sock, CTYPE_TEST);
    ecp_vconn_init(vconn, vconn_size, &conn, sock);
    rv = ecp_vconn_open(vconn, vconn_pub, &addr, &srv_public);
    LOG("ecp_vconn_open", rv);

    ecp_dir_list_destroy(dir_list);
}

static void usage(char *arg) {
    fprintf(stderr, "Usage: %s <server.pub> <address> <dir.pub>\n", arg);
    exit(1);
}

int main(int argc, char *argv[]) {
    ECPDHKey key_perma;
    ecp_tr_addr_t addr;
    ecp_ecdh_public_t public;
    int rv;

    if (argc != 4) usage(argv[0]);

    rv = ecp_init(&ctx, &vconn_handler, &vlink_handler);
    LOG("ecp_init", rv);

    rv = ecp_dir_set_handler(&ctx, &dir_handler, handle_dir_list);
    LOG("ecp_dir_set_handler", rv);

    ecp_conn_handler_init(&handler, handle_open, NULL, handle_msg, NULL);
    ecp_ctx_set_handler(&ctx, CTYPE_TEST, &handler);

    rv = ecp_dhkey_gen(&key_perma);
    LOG("ecp_dhkey_gen", rv);

    rv = ecp_sock_create(&sock, &ctx, &key_perma);
    LOG("ecp_sock_create", rv);

    rv = ecp_vconn_sock_create(&sock);
    LOG("ecp_vconn_sock_create", rv);

    rv = ecp_sock_open(&sock, NULL);
    LOG("ecp_sock_open", rv);

    rv = ecp_start_receiver(&sock);
    LOG("ecp_start_receiver", rv);

    rv = ecp_util_load_key(argv[1], &srv_public, NULL);
    LOG("ecp_util_load_key", rv);

    rv = ecp_addr_init(&addr, argv[2]);
    LOG("ecp_addr_init", rv);

    rv = ecp_util_load_key(argv[3], &public, NULL);
    LOG("ecp_util_load_key", rv);

    rv = ecp_dir_get(&dir_conn, &sock, &public, &addr, 0);
    LOG("ecp_dir_get", rv);

    while (1) sleep(1);
}