/*  nTox_win32.c
 *
 *  Textual frontend for Tox - Windows version
 *
 *  Copyright (C) 2013 Tox project All Rights Reserved.
 *
 *  This file is part of Tox.
 *
 *  Tox is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Tox is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Tox.  If not, see <http://www.gnu.org/licenses/>.
 *  
 */

#include "nTox_win32.h"
#include "misc_tools.h"

#include <process.h>

typedef struct {
    uint8_t id[CLIENT_ID_SIZE];
    uint8_t accepted;
} Friend_request;

Friend_request pending_requests[256];
uint8_t num_requests = 0;
uint32_t maxnumfriends;

char line[STRING_LENGTH];
char users_id[200];
int friend_request_received;

void do_header()
{
    system("cls");
    printf(users_id);
    printf("\n---------------------------------");
    printf("\n[i] commands: /f ID (to add friend), /m friendnumber message  (to send message), /s status (to change status), /n nick (to change nickname), /l (lists friends), /d friendnumber (deletes friend), /q (to quit), /r (reset screen)");
    printf("\n---------------------------------");
}

void print_request(uint8_t *public_key, uint8_t *data, uint16_t length)
{
    friend_request_received = 1;
    printf("\n\n[i] received friend request with message\n");
    printf("'%s'",(char *)data);
    char numchar[100];
    sprintf(numchar, "\n[i] accept request with /a %u\n\n", num_requests);
    printf(numchar);
    memcpy(pending_requests[num_requests].id, public_key, CLIENT_ID_SIZE);
    pending_requests[num_requests].accepted = 0;
    ++num_requests;
}

void print_message(int friendnumber, uint8_t * string, uint16_t length)
{
    char name[MAX_NAME_LENGTH];
    getname(friendnumber, (uint8_t*)name);
    char msg[100+length+strlen(name)+1];
    time_t rawtime;
    struct tm * timeinfo;
    time (&rawtime);
    timeinfo = localtime (&rawtime);
    char* temp = asctime(timeinfo);
    size_t len = strlen(temp);
    temp[len-1]='\0';
    sprintf(msg, "\n[%d] %s <%s> %s\n\n", friendnumber, temp, name, string); // timestamp
    printf(msg);
}

void print_nickchange(int friendnumber, uint8_t *string, uint16_t length)
{
    char name[MAX_NAME_LENGTH];
    getname(friendnumber, (uint8_t*)name);
    char msg[100+length];
    sprintf(msg, "\n\n[i] [%d] %s is now known as %s.\n\n", friendnumber, name, string);
    printf(msg);
}

void print_statuschange(int friendnumber, uint8_t *string, uint16_t length) 
{
    char name[MAX_NAME_LENGTH];
    getname(friendnumber, (uint8_t*)name);
    char msg[100+length+strlen(name)+1];
    sprintf(msg, "\n\n[i] [%d] %s's status changed to %s.\n\n", friendnumber, name, string);
    printf(msg);
}

void load_key() 
{
    FILE *data_file = NULL;
    data_file = fopen("data","r");
    if (data_file) {
        fseek(data_file, 0, SEEK_END);
        int size = ftell(data_file);
        fseek(data_file, 0, SEEK_SET);
        uint8_t data[size];
        if (fread(data, sizeof(uint8_t), size, data_file) != size) {
            printf("\n[i] Could not read the data file. Exiting.");
            exit(1);
        }

        Messenger_load(data, size);
    } else {
        int size = Messenger_size();
        uint8_t data[size];
        Messenger_save(data);
        fclose(data_file);
        data_file = fopen("data", "w");

        if (fwrite(data, sizeof(uint8_t), size, data_file) != size) {
            printf("\n[i] Could not write data to file. Exiting.");
            exit(1);
        }
    }
    fclose(data_file);
}

void add_friend()
{
    int i;
    char temp_id[128];
    
    for (i = 0; i < 128; i++)  
        temp_id[i] = line[i+3];
    
    int num = m_addfriend(hex_string_to_bin(temp_id), (uint8_t*)"Install Gentoo", sizeof("Install Gentoo"));
   
    if (num >= 0) {
        char numstring[100];
        sprintf(numstring, "\n[i] Friend request sent. Wait to be accepted. Friend id: %d\n\n", num);
        printf(numstring);
        ++maxnumfriends;
    }
    else if (num == -1) 
        printf("\n[i] Message is too long.\n\n");
    
    else if (num == -2)
        printf("\n[i] Please add a message to your friend request.\n\n");
    
    else if (num == -3)
        printf("\n[i] That appears to be your own ID.\n\n");
    
    else if (num == -4)
        printf("\n[i] Friend request already sent.\n\n");
    
    else if (num == -5)
        printf("\n[i] Undefined error when adding friend\n\n");
}

void list_friends()
{
    int i;
    
    printf("\n[i] Friend List");

    printf("----- PENDING -----\n\n");

    for (i = 0; i <= maxnumfriends; i++) {
        char name[MAX_NAME_LENGTH];
        getname(i, (uint8_t*)name);
        if (m_friendstatus(i) > 0 && m_friendstatus(i) < 4)
            printf("[%d] %s\n", i, (uint8_t*)name);
    }
    
    printf("\n");

    printf("----- ACTIVE -----\n\n");

    for (i = 0; i <= maxnumfriends; i++) {
        char name[MAX_NAME_LENGTH];
        getname(i, (uint8_t*)name);
        
        if (m_friendstatus(i) == 4)    
            printf("[%d] %s\n", i, (uint8_t*)name);
    }

    printf("\n");
}

void delete_friend()
{
    size_t len = strlen(line);
    char numstring[len-3];
    int i;
    
    for (i = 0; i < len; i++) {
        if (line[i+3] != ' ')
            numstring[i] = line[i+3];
    }
    
    int num = atoi(numstring);
    m_delfriend(num);
    --maxnumfriends;
    printf("\n\n");
}

void message_friend()
{
    size_t len = strlen(line);
    char numstring[len-3];
    char message[len-3];
    int i;
    
    for (i = 0; i < len; i++) {

        if (line[i+3] != ' ') 
            numstring[i] = line[i+3];

        else {
            int j;

            for (j = (i+1); j < len; j++)
                message[j-i-1] = line[j+3];

            break;
        }
    }

    int num = atoi(numstring);

    if(m_sendmessage(num, (uint8_t*) message, sizeof(message)) != 1)
        printf("\n[i] could not send message (they may be offline): %s\n", message);
   
    else
        printf("\n");
}

void change_nickname()
{
    uint8_t name[MAX_NAME_LENGTH];
    int i = 0;
    size_t len = strlen(line);
    
    for (i = 3; i < len; i++) {

        if (line[i] == 0 || line[i] == '\n') 
            break;

        name[i-3] = line[i];
    }
    
    name[i-3] = 0;
    setname(name, i);
    char numstring[100];
    sprintf(numstring, "\n[i] changed nick to %s\n\n", (char*)name);
    printf(numstring);

    FILE *name_file = NULL;
    name_file = fopen("namefile.txt", "w");
    fprintf(name_file, "%s", (char*)name);
    fclose(name_file);
}

void change_status(int savetofile)
{
    uint8_t status[MAX_USERSTATUS_LENGTH];
    int i = 0;
    size_t len = strlen(line);
    
    for (i = 3; i < len; i++) {
        if (line[i] == 0 || line[i] == '\n') 
            break;
        
        status[i-3] = line[i];
    }

    status[i-3] = 0;
    m_set_userstatus(status, strlen((char*)status));
    char numstring[100];
    sprintf(numstring, "\n[i] changed status to %s\n\n", (char*)status);
    printf(numstring);

    if (savetofile == 1) {
        FILE* status_file = NULL;
        status_file = fopen("statusfile.txt", "w");
        fprintf(status_file, "%s", (char*)status);
        fclose(status_file);
    }
}

void accept_friend_request()
{
    friend_request_received = 0;
    uint8_t numf = atoi(line + 3);
    char numchar[100];
    if (numf >= num_requests || pending_requests[numf].accepted) {
        sprintf(numchar, "\n[i] you either didn't receive that request or you already accepted it");
        printf(numchar);
    } else {
        int num = m_addfriend_norequest(pending_requests[numf].id);
        if (num != -1) {
            pending_requests[numf].accepted = 1;
            sprintf(numchar, "\n[i] Added friendnumber: %d\n\n", num);
            printf(numchar);
            ++maxnumfriends;
        } else {
            sprintf(numchar, "[i] failed to add friend");
            printf(numchar);
        }
    }
}

void line_eval(char* line)
{
    if(line[0] == '/') {

        char inpt_command = line[1];

        if(inpt_command == 'f') {
            add_friend();
        }

        else if (inpt_command == 'r') {
            do_header();
            printf("\n\n");
        }

        else if (inpt_command == 'l') {
            list_friends();
        }

        else if (inpt_command == 'd') {
            delete_friend();
        }
        /* Send message to friend */
        else if (inpt_command == 'm') {
            message_friend();
        }

        else if (inpt_command == 'n') {
            change_nickname();
        }

        else if (inpt_command == 's') {
            change_status(1);
        }

        else if (inpt_command == 'a') {
            if (friend_request_received == 1)
                accept_friend_request(line);
        }
        /* EXIT */
        else if (inpt_command == 'q') { 
            strcpy(line, "---Offline");
            change_status(0);
            exit(EXIT_SUCCESS);
        }
    }
}

void get_input()
{
    while(1) {
        fgets(line, STRING_LENGTH, stdin);
        line_eval(line);
        strcpy(line, "");
    }
}

int main(int argc, char *argv[])
{
    if (argc < 4) {
        printf("[!] Usage: %s [IP] [port] [public_key] <nokey>\n", argv[0]);
        exit(0);
    }
    if (initMessenger() == -1) {
        printf("initMessenger failed");
        exit(0);
    }
    if (argc > 4) {
        if(strncmp(argv[4], "nokey", 6) < 0) {
        }
    } else {
        load_key();
    }

    int nameloaded = 0;
    int statusloaded = 0;

    FILE* name_file = NULL;
    name_file = fopen("namefile.txt", "r");
    if(name_file) {
        uint8_t name[MAX_NAME_LENGTH];
        while (fgets(line, MAX_NAME_LENGTH, name_file) != NULL) {
            sscanf(line, "%s", (char*)name);
        }
        setname(name, strlen((char*)name)+1);
        nameloaded = 1;
        printf("%s\n", name);
        fclose(name_file);
    } 

    FILE* status_file = NULL;
    status_file = fopen("statusfile.txt", "r");
    if(status_file) {
        uint8_t status[MAX_USERSTATUS_LENGTH];
        while (fgets(line, MAX_USERSTATUS_LENGTH, status_file) != NULL) {
            sscanf(line, "%s", (char*)status);
        }
        m_set_userstatus(status, strlen((char*)status)+1);
        statusloaded = 1;
        printf("%s\n", status);
        fclose(status_file);
    }

    m_callback_friendrequest(print_request);
    m_callback_friendmessage(print_message);
    m_callback_namechange(print_nickchange);
    m_callback_userstatus(print_statuschange);
    char idstring1[PUB_KEY_BYTES][5];
    char idstring2[PUB_KEY_BYTES][5];
    int i;
    for(i = 0; i < PUB_KEY_BYTES; i++)
    {
        if(self_public_key[i] < (PUB_KEY_BYTES/2))
            strcpy(idstring1[i],"0");
        else 
            strcpy(idstring1[i], "");
        sprintf(idstring2[i], "%hhX",self_public_key[i]);
    }
    strcpy(users_id,"[i] your ID: ");
    int j;
    for (j = 0; j < PUB_KEY_BYTES; j++) {
        strcat(users_id,idstring1[j]);
        strcat(users_id,idstring2[j]);
    }

    do_header();
    
    IP_Port bootstrap_ip_port;
    bootstrap_ip_port.port = htons(atoi(argv[2]));
    int resolved_address = resolve_addr(argv[1]);
    if (resolved_address != 0)
        bootstrap_ip_port.ip.i = resolved_address;
    else 
        exit(1);
    
    DHT_bootstrap(bootstrap_ip_port, hex_string_to_bin(argv[3]));

    int c;
    int on = 0;

    _beginthread(get_input, 0, NULL);

    if (nameloaded == 1) {
        printf("\nNickname automatically loaded");
        printf("\n---------------------------------");
    }

    if (statusloaded == 1) {
        printf("\nStatus automatically loaded");
        printf("\n---------------------------------");
    }

    while(1) {
        if (on == 1 && DHT_isconnected() == -1) {
            printf("\n---------------------------------");
            printf("\n[i] Disconnected from the DHT");
            printf("\n---------------------------------\n\n");
            on = 0;
        }
        if (on == 0 && DHT_isconnected()) {
            printf("\n[i] Connected to DHT");
            printf("\n---------------------------------\n\n");
            on = 1;
        }
        doMessenger();
        Sleep(1);
    }
    return 0;
}