#include <curses.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "defines.h"
#include "backend.h"
#include "file_previews.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;
pthread_mutex_t mutex_selection;

file *rgt_content;
file *mid_content;
file *lft_content;
char *rgt_buffer; /* used for file previews, unlike rgt_content, which is used for directory previews */

file file_current;

char *top_content; /* current path */

unsigned long rgt_file_count;
unsigned long mid_file_count;
unsigned long lft_file_count;
unsigned long top_width;

	

extern unsigned int status;
extern unsigned long selected_file_current;
extern unsigned long selected_file_last;

void *thread_rgt(void *data);

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


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


		if (status & STATUS_RELOAD_DIRECTORY) {
			free(mid_content);
			mid_file_count = (unsigned long)get_dir_size(path);
			mid_content = malloc(mid_file_count * sizeof(file));
			memset(mid_content, ' ', mid_file_count * sizeof(file));
			get_dir_content(path, &mid_file_count, mid_content);
		}


		pthread_mutex_lock(&mutex_selection);
		if (selected_file_current >= mid_file_count) {
			selected_file_current = mid_file_count-1;
		}
		mid_content[selected_file_current].status = FILE_STATUS_HOVER;
		if (selected_file_current != selected_file_last) {
			mid_content[selected_file_last].status &= ~FILE_STATUS_HOVER;
		}
		selected_file_last = selected_file_current;
		pthread_mutex_unlock(&mutex_selection);

		file_current.file_name = malloc(mid_content[selected_file_current].file_name_width + 1);
		strcpy(file_current.file_name, mid_content[selected_file_current].file_name);
		file_current.file_name_width = mid_content[selected_file_current].file_name_width;
		file_current.file_size_bytes = mid_content[selected_file_current].file_size_bytes;
		file_current.file_type = mid_content[selected_file_current].file_type;

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



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

		path[strrchr(path, '/')-path] = '\0';
		path[0] = '/';

		if (status & STATUS_RELOAD_DIRECTORY) {
			free(lft_content);
			lft_file_count = (unsigned long)get_dir_size(path);
			lft_content = malloc(lft_file_count * sizeof(file));
			memset(lft_content, ' ', lft_file_count * sizeof(file));
			get_dir_content(path, &lft_file_count, lft_content);
		}

	}
	free(path);
	pthread_mutex_unlock(&mutex_lft);
	/*}}}*/
	pthread_exit(NULL);


}
void *thread_rgt(void *data){
	pthread_mutex_lock(&mutex_rgt);

	pthread_mutex_lock(&mutex_mid);
	/* TODO(2025-06-13T01:24:43) fix the occasional wrongly coppied path */
	free(rgt_content);
	rgt_content = malloc(sizeof(file));
	rgt_content[0].file_name = malloc(file_current.file_name_width + 1);
	strcpy(rgt_content[0].file_name, file_current.file_name);
	rgt_content[0].file_name_width = file_current.file_name_width;
	rgt_content[0].file_size_bytes = file_current.file_size_bytes;
	rgt_content[0].file_type = file_current.file_type;

	pthread_mutex_unlock(&mutex_mid);

	if (rgt_content[0].file_type == FILE_TYPE_DIR || rgt_content[0].file_type == FILE_TYPE_SYMLINK) {
		char *path = malloc(rgt_content[0].file_name_width + 1);
		strcpy(path, rgt_content[0].file_name);
		free(rgt_content);
		rgt_file_count = get_dir_size(path);
		rgt_content = malloc(rgt_file_count * sizeof(file));
		memset(rgt_content, ' ', rgt_file_count * sizeof(file));
		get_dir_content(path, &rgt_file_count, rgt_content);
		rgt_content[0].status &= ~FILE_STATUS_FILE_OPEN;
		free(path);
	} else if (rgt_content[0].file_type == FILE_TYPE_REGULAR) {

		rgt_file_count = 1;

		rgt_content[0].file_type = FILE_TYPE_OPEN_FILE;
		rgt_content[0].status = FILE_STATUS_HOVER;
		free(rgt_buffer);
		rgt_buffer = preview_file(rgt_content[0].file_name, rgt_content[0].file_size_bytes);

	}

	pthread_mutex_unlock(&mutex_rgt);
	pthread_exit(NULL);
}
void *thread_top(void *data){
	pthread_mutex_lock(&mutex_top);
	free(top_content);

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

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

	pthread_exit(NULL);
}

void threading_init(){
	rgt_content = malloc(sizeof(file));
	mid_content = malloc(sizeof(file));
	lft_content = malloc(sizeof(file));

	top_content = malloc(sizeof(char));
	rgt_buffer = malloc(sizeof(char));

	file_current.file_type = 0;
	file_current.file_size_bytes = 1;
	file_current.file_name_width = 1;
	file_current.file_name = "a";

	pthread_mutex_init(&mutex_top, NULL);
	pthread_mutex_init(&mutex_mid, NULL);
	pthread_mutex_init(&mutex_lft, NULL);
	pthread_mutex_init(&mutex_selection, NULL);
	selected_file_current = 0;
	selected_file_last = 0;
}
void threading_free(){
	free(rgt_content);
	free(mid_content);
	free(lft_content);
	free(top_content);
	
	pthread_mutex_destroy(&mutex_top);
	pthread_mutex_destroy(&mutex_mid);
	pthread_mutex_destroy(&mutex_lft);
}