/*
 * Toxic -- Tox Curses Client
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <string.h>
#include <stdint.h>
#include <ctype.h>
#include <stdbool.h>

#include <tox/tox.h>

#include "friendlist.h"

extern char *DATA_FILE;
extern int store_data(Tox *m, char *path);

typedef struct {
    uint8_t name[TOX_MAX_NAME_LENGTH];
    uint8_t status[TOX_MAX_STATUSMESSAGE_LENGTH];
    int num;
    int chatwin;
    bool active;    
} friend_t;

static friend_t friends[MAX_FRIENDS_NUM];
static int num_friends = 0;
static int num_selected = 0;


void friendlist_onMessage(ToxWindow *self, Tox *m, int num, uint8_t *str, uint16_t len)
{
    if (num >= num_friends)
        return;

    if (friends[num].chatwin == -1) {
        friends[num].chatwin = add_window(m, new_chat(m, friends[num].num));
    }
}

void friendlist_onNickChange(ToxWindow *self, int num, uint8_t *str, uint16_t len)
{
    if (len >= TOX_MAX_NAME_LENGTH || num >= num_friends)
        return;

    memcpy((char *) &friends[num].name, (char *) str, len);
    friends[num].name[len] = 0;
}

void friendlist_onStatusChange(ToxWindow *self, int num, uint8_t *str, uint16_t len)
{
    if (len >= TOX_MAX_STATUSMESSAGE_LENGTH || num >= num_friends)
        return;

    memcpy((char *) &friends[num].status, (char *) str, len);
    friends[num].status[len] = 0;
}

int friendlist_onFriendAdded(Tox *m, int num)
{
    if (num_friends == MAX_FRIENDS_NUM)
        return -1;

    int i;

    for (i = 0; i <= num_friends; ++i) {
        if (!friends[i].active) {
            friends[i].num = num;
            friends[i].active = true;
            friends[i].chatwin = -1;
            tox_getname(m, num, friends[i].name);
            strcpy((char *) friends[i].name, "unknown");
            strcpy((char *) friends[i].status, "Offline");

            if (i == num_friends)
                ++num_friends;

            return 0;
        }
    }

    return -1;
}

static void select_friend(wint_t key)
{
    if (num_friends < 1)
        return;

    int n = num_selected;

    if (key == KEY_UP) {
        while (true) {
            if (--n < 0)
                n = num_friends-1;
            if (friends[n].active) {
                num_selected = n;
                return;
            }
        }
    } else if (key == KEY_DOWN) {
        while (true) {
            n = (n + 1) % num_friends;
            if (friends[n].active) {
                num_selected = n;
                return;
            }
        }
    }
}

static void delete_friend(Tox *m, ToxWindow *self, int f_num, wint_t key)
{
    tox_delfriend(m, f_num);
    memset(&(friends[f_num]), 0, sizeof(friend_t));
    friends[f_num].active = false;
    
    int i;

    for (i = num_friends; i != 0; --i) {
        if (friends[i-1].active)
            break;
    }

    if (store_data(m, DATA_FILE))
        wprintw(self->window, "\nFailed to store messenger data\n");

    num_friends = i;
    select_friend(KEY_DOWN);
}

static void friendlist_onKey(ToxWindow *self, Tox *m, wint_t key)
{
    if (key == KEY_UP || key == KEY_DOWN) {
        select_friend(key);
    } else if (key == '\n') {
        /* Jump to chat window if already open */
        if (friends[num_selected].chatwin != -1) {
            set_active_window(friends[num_selected].chatwin);
        } else {
            friends[num_selected].chatwin = add_window(m, new_chat(m, friends[num_selected].num));
        }
    } else if (key == 0x107 || key == 0x8 || key == 0x7f)
        delete_friend(m, self, num_selected, key);
}

static void friendlist_onDraw(ToxWindow *self, Tox *m)
{
    curs_set(0);
    werase(self->window);

    if (num_friends == 0) {
        wprintw(self->window, "Empty. Add some friends! :-)\n");
    } else {
        wattron(self->window, COLOR_PAIR(2) | A_BOLD);
        wprintw(self->window, " * Open chat with up/down keys and enter. ");
        wprintw(self->window, "Delete friends with the backspace key\n");
        wattroff(self->window, COLOR_PAIR(2) | A_BOLD);
    }

    wprintw(self->window, "\n");

    int i;

    for (i = 0; i < num_friends; ++i) {
        if (friends[i].active) {
            if (i == num_selected)
                wattron(self->window, COLOR_PAIR(3));

            wprintw(self->window, " > ");

            if (i == num_selected)
                wattroff(self->window, COLOR_PAIR(3));

            attron(A_BOLD);
            wprintw(self->window, "%s ", friends[i].name);
            attroff(A_BOLD);

            wprintw(self->window, "(%s)\n", friends[i].status);
        }
    }

    wrefresh(self->window);
}

void disable_chatwin(int f_num)
{
    friends[f_num].chatwin = -1;
}

static void friendlist_onInit(ToxWindow *self, Tox *m)
{

}

ToxWindow new_friendlist()
{
    ToxWindow ret;
    memset(&ret, 0, sizeof(ret));

    ret.onKey = &friendlist_onKey;
    ret.onDraw = &friendlist_onDraw;
    ret.onInit = &friendlist_onInit;
    ret.onMessage = &friendlist_onMessage;
    ret.onAction = &friendlist_onMessage;    // Action has identical behaviour to message
    ret.onNickChange = &friendlist_onNickChange;
    ret.onStatusChange = &friendlist_onStatusChange;

    strcpy(ret.title, "[friends]");
    return ret;
}