#include <curses.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "defines.h"
#include "backend.h"


pthread_mutex_t mutex_top;
pthread_mutex_t mutex_btm;
pthread_mutex_t mutex_lft;
pthread_mutex_t mutex_mid;
pthread_mutex_t mutex_rgt;

/* contains entire directory as 2d array
 * may be changed in future to only include parts of the dir (currently includes entire dir) */
char *mid_content;
char *lft_content;
char *top_content; /* current path */
/* index 0 = file_count 
 * index 1 = longest_name */
unsigned long *mid_length_width;
unsigned long *lft_length_width;
unsigned long *top_length_width;
/* this array exists so that a file with a 3 char long name wont spend the same amount of time printing as a file with 200 chars
 * should both exist in the same directory
 * currently unused */
unsigned long *mid_file_name_width;
unsigned long *lft_file_name_width;


extern unsigned int status;

void *thread_mid(void *data){
	pthread_mutex_lock(&mutex_mid);

	free(mid_content);
	free(mid_file_name_width);
	free(mid_length_width);
	mid_length_width = malloc(sizeof(char)*2);

	char *path;
	if((path=getcwd(NULL, 0)) == NULL) {
		mid_content = malloc(sizeof("cannot open directory"));
		mid_length_width[0] = 1;
		mid_length_width[1] = sizeof("cannot open directory");
		mid_content = "cannot open directory";
	} else {


		get_dir_size(path, mid_length_width, mid_file_name_width);
		mid_file_name_width = malloc(mid_length_width[0] * sizeof(unsigned long));
		mid_content = malloc(mid_length_width[0] * mid_length_width[1] * sizeof(char));
		memset(mid_content, ' ', mid_length_width[0] * mid_length_width[1] * sizeof(char));
		get_dir_content(path, mid_length_width, mid_file_name_width, mid_content);

	}
	free(path);
	pthread_mutex_unlock(&mutex_mid);
	pthread_exit(NULL);
}
void *thread_lft(void *data){
	pthread_mutex_lock(&mutex_lft);

	free(lft_content);
	free(lft_file_name_width);
	free(lft_length_width);
	lft_length_width = malloc(sizeof(char)*2);

	char *path;
	if((path=getcwd(NULL, 0)) == NULL) {
		lft_content = malloc(sizeof("cannot open directory"));
		lft_length_width[0] = 1;
		lft_length_width[1] = sizeof("cannot open directory");
		lft_content = "cannot open directory";
	} else {

		
		char *parent ;
		if((parent = malloc(strlen(path)+strlen("/..")+1)) != NULL){
			parent[0] = '\0';   /* ensures empty string */
			strcat(parent, path);
			strcat(parent, "/..");
		}

		get_dir_size(parent, lft_length_width, lft_file_name_width);
		lft_file_name_width = malloc(lft_length_width[0] * sizeof(unsigned long));
		lft_content = malloc(lft_length_width[0] * lft_length_width[1] * sizeof(char));
		memset(lft_content, ' ', lft_length_width[0] * lft_length_width[1] * sizeof(char));
		get_dir_content(parent, lft_length_width, lft_file_name_width, lft_content);
		free (parent);
	}
	free(path);
	pthread_mutex_unlock(&mutex_lft);
	pthread_exit(NULL);
}
void *thread_rgt(void *data){

	
	pthread_exit(NULL);
}
void *thread_top(void *data){
	pthread_mutex_lock(&mutex_top);
	free(top_content);
	free(top_length_width);
	top_length_width = malloc(sizeof(char)*2);

	char *path;
	if((path=getcwd(NULL, 0)) == NULL) {
		top_content = malloc(sizeof("cannot open directory"));
		top_length_width[0] = 1;
		top_length_width[1] = sizeof("cannot open directory");
		top_content = "cannot open directory";
	} else {
		top_content = getcwd(NULL, 0);
		top_length_width[0] = 1;
		top_length_width[1] = strlen(top_content);
	}

	free(path);
	pthread_mutex_unlock(&mutex_top);
	pthread_exit(NULL);
}
void *thread_btm(void *data){

	pthread_exit(NULL);
}

void threading_init(){
	mid_content = malloc(sizeof(char));
	mid_file_name_width = malloc(sizeof(char));
	mid_length_width = malloc(sizeof(char));
	lft_content = malloc(sizeof(char));
	lft_file_name_width = malloc(sizeof(char));
	lft_length_width = malloc(sizeof(char));
	top_length_width = malloc(sizeof(char));
	top_content = malloc(sizeof(char));


	pthread_mutex_init(&mutex_top, NULL);
	pthread_mutex_init(&mutex_mid, NULL);
	pthread_mutex_init(&mutex_lft, NULL);
}
void threading_free(){
	free(mid_content);
	free(mid_file_name_width);
	free(mid_length_width);
	
	pthread_mutex_destroy(&mutex_top);
	pthread_mutex_destroy(&mutex_mid);
	pthread_mutex_destroy(&mutex_lft);
}