#define _POSIX_C_SOURCE 200809L
#include <curses.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/sysinfo.h>
#include "threading.h"
#include "window.h"
#include "defines.h"
#include "colors.h"
#include "interactions.h"

unsigned int terminal_height;
unsigned int terminal_width;
unsigned int temp_heigth = 0; /*used for screen refresh*/
unsigned int temp_width = 0; 
unsigned int settings;
unsigned int file_modifiers;
unsigned int status; 

WINDOW *win_t;
WINDOW *win_b;
WINDOW *win_l;
WINDOW *win_m;
WINDOW *win_r;

char *input; /*used in user_interactions*/

void render_pass();
void init();


int main(){

	init();

	getmaxyx(stdscr, terminal_height, terminal_width);
	WINDOW *wint = newwin(1, terminal_width, 0, 0);
	WINDOW *winb = newwin(1, terminal_width, terminal_height-1, 0);
	WINDOW *winl = newwin(terminal_height-2, terminal_width/8, 1, 0);
	WINDOW *winm = newwin(terminal_height-2, terminal_width/3, 1, (terminal_width/8));
	WINDOW *winr = newwin(terminal_height-2, terminal_width/3, 1, ((terminal_width/2)));
	win_t = wint;
	win_b = winb;
	win_r = winr;
	win_m = winm;
	win_l = winl;

	pthread_t thread_b;
	pthread_t thread_t;
	pthread_t thread_l;
	pthread_t thread_m;
	pthread_t thread_r;

	char threading = 0;

		
	while(!(status & STATUS_QUIT_PROGRAM)){
		getmaxyx(stdscr, terminal_height, terminal_width);

		if (!(terminal_height == temp_heigth) || !(terminal_width == temp_width)) {
			status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_RESIZE);
			temp_width = terminal_width;
			temp_heigth = terminal_height;
		}
		if (status & STATUS_RUN_BACKEND) {
			if (threading) {
				pthread_cancel(thread_t);
				pthread_cancel(thread_l);
				pthread_cancel(thread_m);
				pthread_cancel(thread_r);
				pthread_cancel(thread_b);
				threading = 0;
			} 
			pthread_create(&thread_t, NULL, thread_top, win_t); /*top bar*/
			pthread_create(&thread_l, NULL, thread_lft, win_l); /*current_content slash win_m*/
			pthread_create(&thread_m, NULL, thread_mid, win_m); /*parent_content slash win_l*/
			pthread_create(&thread_r, NULL, thread_rgt, win_r); /*child_content slash win_r*/
			pthread_create(&thread_b, NULL, thread_btm, win_b); /*bottom bar*/
			threading = 1;
			status &= ~(STATUS_RUN_BACKEND | STATUS_RELOAD_DIRECTORY);
			status |= STATUS_UPDATE_SCREEN_0;
		}
		user_interactions();


		render_pass();

	}
	/*
	threading_free();

	pthread_join(thread_l, NULL);
	pthread_join(thread_r, NULL);
	pthread_join(thread_m, NULL);
	pthread_join(thread_t, NULL);
	pthread_join(thread_b, NULL);
	*/

	delwin(win_l);
	delwin(win_m);
	delwin(win_r);
	delwin(win_t);
	delwin(win_b);
	endwin();
	noraw();
	curs_set(1);
	echo();
	return 0;
}


void render_pass(){
	
	if (status & STATUS_UPDATE_SCREEN_RESIZE) {
		if (status & STATUS_UPDATE_SCREEN_RELOAD_FULL) {
			clear();
			status &= ~STATUS_UPDATE_SCREEN_RELOAD_FULL;
		}

		/*TODO: check if deallocation of window and reallocation is faster than this or not */

		werase(win_t);
		werase(win_b);
		werase(win_l);
		werase(win_m);
		werase(win_r);

		wresize(win_t, 1, terminal_width);
		wresize(win_l, terminal_height-2, terminal_width/8);
		wresize(win_m, terminal_height-2, (terminal_width/2)-(terminal_width/8));
		wresize(win_r, terminal_height-2, terminal_width/2);
		wresize(win_b, 1, terminal_width);


		mvwin(win_t, 0, 0);
                mvwin(win_l, 1, 0);
                mvwin(win_m, 1, (terminal_width/8));
                mvwin(win_r, 1, ((terminal_width/2)));
		mvwin(win_b, terminal_height-1, 0);


		status |= STATUS_UPDATE_SCREEN_0;
	}

	if (status & STATUS_UPDATE_SCREEN_MASK) {
		status &= ~(STATUS_UPDATE_SCREEN_MASK);
		window_top(win_t);
		window_lft(win_l);
		window_mid(win_m);
		window_rgt(win_r);
		window_btm(win_b);
		wrefresh(win_t);
		wrefresh(win_l);
		wrefresh(win_m);
		wrefresh(win_r);
		wrefresh(win_b);
	}
}
/*this function exists for things done at startup (initialization, reading config, etc)*/
void init() {

	initscr(); /* start ncurses */
	noecho(); /* hide keyboard input */
	timeout(0); /* blocking timeout of getch() */
	keypad(stdscr, TRUE);
	curs_set(0);

	/*file_modifiers = (FILE_MODIFIERS_HIDDEN_FILES | FILE_MODIFIERS_SORT_BITMASK);*/
	input = malloc(sizeof(char)*255); /* size of input buffer, out of bounds access will not be accounted for */
	memset(input, 0, 255);
	status = (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_MASK | STATUS_RELOAD_DIRECTORY); 
	if (getuid() == 0) {
		status += STATUS_USER_ROOT;
	}

	threading_init(); /* found in threading.c */
	colors_init();
	ESCDELAY = 10;


}