#define _POSIX_C_SOURCE 200809L
#include <curses.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/sysinfo.h>
#include "threading.h"
#include "window.h"
#include "interactions.h"
#include "defines.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; 
char input = 0;

void render_pass(WINDOW *wint, WINDOW *winb, WINDOW *winl, WINDOW *winm, WINDOW *winr);
void init();


int main() {

	init();

	getmaxyx(stdscr, terminal_height, terminal_width);
	WINDOW *win_t = newwin(1, terminal_width, 0, 0);
	WINDOW *win_b = newwin(1, terminal_width, terminal_height-1, 0);
	WINDOW *win_l = newwin(terminal_height-2, terminal_width/3, 1, 0);
	WINDOW *win_m = newwin(terminal_height-2, terminal_width/3, 1, (terminal_width/3));
	WINDOW *win_r = newwin(terminal_height-2, terminal_width/3, 1, ((terminal_width/3)*2));

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

		render_pass(win_t, win_b, win_l, win_m, win_r);

	}
	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);

	curs_set(1);
	endwin();
	refresh();
	return 0;
}


void render_pass(WINDOW *win_t, WINDOW *win_b, WINDOW *win_l, WINDOW *win_m, WINDOW *win_r){
	
	if ((status & STATUS_UPDATE_SCREEN_MASK) & STATUS_UPDATE_SCREEN_RESIZE) {
		status |= STATUS_LOCK_MASK;

		/*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_b, terminal_height, terminal_width/3);
		wresize(win_m, terminal_height-2, terminal_width/3);
		wresize(win_l, terminal_height-2, terminal_width/3);
		wresize(win_r, terminal_height-2, terminal_width/3);

		mvwin(win_t, 0, 0);
                mvwin(win_b, terminal_height-1, 0);
                mvwin(win_l, 1, 0);
                mvwin(win_m, 1, (terminal_width/3));
                mvwin(win_r, 1, ((terminal_width/3)*2));


		status &= ~STATUS_LOCK_MASK;
		status |= STATUS_UPDATE_SCREEN_0;
	}

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

	initscr(); /*start ncurses*/
	noecho(); /*hide keyboard input*/
	timeout(50); /*blocking timeout of getch()*/
	keypad(stdscr, TRUE);
	curs_set(0);

	/*file_modifiers = (FILE_MODIFIERS_HIDDEN_FILES | FILE_MODIFIERS_SORT_BITMASK);*/
	status = (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_MASK); 

	threading_init(); /* found in threading.c */


}