#include <curses.h>
#include <pthread.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "file_previews.h"
#include "backend.h"
#include "defines.h"
#include "config.h"
#include "dir.h"


extern volatile unsigned long selected_file_current;
extern volatile unsigned long selected_file_last;

extern unsigned int file_modifiers;
extern pthread_mutex_t mutex_selection;
extern pthread_mutex_t mutex_rgt;
extern pthread_mutex_t mutex_mid;
extern pthread_mutex_t mutex_btm;
extern pthread_cond_t cond_rgt;
extern dir mid_dir;

extern unsigned int terminal_height;
extern unsigned int terminal_width;

extern WINDOW *win_b;

extern char *rgt_buffer;
extern char *btm_buffer;

extern unsigned int status;
extern char *start_path;
extern char *input;

extern time_t seed;

char search_buffer[INPUT_BUFFER_SIZE];
unsigned int input_pass;
unsigned long parsed_input_number;
yank yank_files = { 0 };

extern void render_pass();
extern int (*order_func)();


#define TODO noraw(); \
	endwin();\
	curs_set(1);\
	echo();\
	printf("TODO: %s at %d in %s \n", __func__, __LINE__, __FILE__);\
	exit(1);

void FAIL(char *function, char *str){
	printf("ERROR in function %s: %s", function, str);
}
void user_interactions() {


	char ch;
	unsigned long i;
	unsigned long binding_matches = 0;


	ch = getch();
	if(ch != ERR) {
		input[input_pass] = ch;
		input_pass++;
		if (ch == 27) { /* esc key */
			memset(input, 0, INPUT_BUFFER_SIZE);
			input_pass = 0;
		}
		status |= STATUS_UPDATE_SCREEN_INTERACTION;
	}


	void (*func_ptr)(int, int);
	unsigned long number_length = 0;
	
	parsed_input_number = 0;
	while((*input >= '0') && (*input <= '9')) {
		parsed_input_number = (parsed_input_number * 10) + (*input - '0');
		input++;
		number_length++;
	}
	if (parsed_input_number == 0) {
		parsed_input_number = 1;
	}
	input -= number_length;

	char cmp_len = strlen(input);
	if(strlen(input) < 1) {
		cmp_len = 1;
	}
	for (i = 0; i < binding_count; i++) {
		if (strncmp(input + number_length, key_binding[i].key, cmp_len) == 0) {
			if (strcmp(input + number_length, key_binding[i].key) == 0) {
				func_ptr = key_binding[i].func;
				func_ptr(parsed_input_number, i);

				timeout(SETTINGS_CURSES_TIMEOUT); /* blocking timeout of getch() */
			} else {
				binding_matches++;
				mvwprintw(stdscr, terminal_height-binding_matches-1, 0, "\t\t\t");
				mvwprintw(stdscr, terminal_height-binding_matches-1, 0, "%s\t%s", key_binding[i].key, key_binding[i].comment);
				status |= STATUS_INPUT_MATCH;
			}
		}
	}
	if (status & STATUS_INPUT_MATCH) {
		attron(A_UNDERLINE);
		mvwprintw(stdscr, terminal_height-binding_matches-2, 0, "input\tcommand\t\t");
		attroff(A_UNDERLINE);
		status &= ~STATUS_INPUT_MATCH;
	} else if (number_length != strlen(input)) {
		memset(input, 0, INPUT_BUFFER_SIZE);
		input_pass = 0;
		number_length = 0;
		binding_matches = 0;
	}
}
int read_string(WINDOW *win, int y, int x, char *str){
	curs_set(1);

	timeout(-1); /* negative numbers block until enter is pressed */

	unsigned int pass = 0;
	char ch;
	char err = 0;

	wmove(win, y, x);
	while(1) {
		/*ch = mvwgetch(win, y, x + pass);*/
		ch = wgetch(win);
		if (ch == '\n') {
			err = 0;
			break;
		} else if (ch == '\t') { /* tab */
			memcpy(str + pass, mid_dir.current_file->file_name, strlen(mid_dir.current_file->file_name));
			mvwaddstr(win, y, x +pass, mid_dir.current_file->file_name);
			pass += strlen(mid_dir.current_file->file_name);
		} else if (ch == 127) { /* backspace */
			if (pass > 0) {
				pass--;
				mvwdelch(win, y, pass);
			}
		} else if (ch == 27) { /* esc key */
			err = 1;
			break;
		} else {
			mvwaddch(win, y, x +pass, ch);
			str[pass] = ch;
			pass++;
		}
	}
	str[pass] = '\0';

	curs_set(0);

	return err;
}
void quit_program(){
	status = STATUS_QUIT_PROGRAM;
}
void update(){
	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_MASK | STATUS_RELOAD_DIRECTORY | STATUS_UPDATE_SCREEN_MASK);
}
void select_all(){
	TODO;
}
void move_down(unsigned long passes){
	mid_dir.current_file = mid_dir.current_file + passes;
	if (mid_dir.current_file >= mid_dir.file_list + mid_dir.file_count - 1) {
		mid_dir.current_file = mid_dir.file_list + mid_dir.file_count - 1;
	}
	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_INTERACTION);
}
void move_up(unsigned long passes){
	mid_dir.current_file = mid_dir.current_file - passes;
	if (mid_dir.current_file <= mid_dir.file_list) {
		mid_dir.current_file = mid_dir.file_list;
	}
	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_INTERACTION);
}
void move_left(unsigned long passes){
	unsigned long i;
	for (i = 0; i < passes; i++) {
		if (chdir("..") != 0) {
			/* TODO(2025-07-09T00:30:05) fix */
			FAIL("move_left", "unhandled error of chdir");
		} else {
		}
	}
	update();

}
void move_right(){
	TODO;
}
void toggle_hidden_files(){
	file_modifiers ^= FILE_MODIFIERS_HIDDEN_FILES;
	status |= (STATUS_RUN_BACKEND | STATUS_RELOAD_DIRECTORY);
}
void toggle_selection(){
	TODO;
}
void jump_bottom(){
	mid_dir.current_file = mid_dir.file_list + mid_dir.file_count - 1;
}
void jump_top(){
	mid_dir.current_file = mid_dir.file_list;
}
void open_with(){
	TODO;
}
void rename_hovered(){
	TODO;
}
void delete(){
	TODO;
}
void makedir(){
	TODO;
}
void makefile(){
	TODO;
}
void enter_shell(unsigned long passes, int index){
	TODO;
}
void not_implemented(unsigned long passes, int index){
	(void)passes;

	mvaddstr(terminal_height-1, 0, key_binding[index].comment);
	mvaddstr(terminal_height-1, strlen(key_binding[index].comment), "\t");
	mvaddstr(terminal_height-1, strlen(key_binding[index].comment) + strlen("\t"), "is not yet implemented");
	TODO;
}
void jump_to_dir(unsigned long passes, int index){
	TODO;
}
void order_by(unsigned long passes, int index){
	(void)passes;

	seed = time(NULL);

	order_func = key_binding[index].black_magic;
	status |= (STATUS_RUN_BACKEND | STATUS_UPDATE_SCREEN_INTERACTION | STATUS_RELOAD_DIRECTORY);
}
void cmd_on_selected(unsigned long passes, int index){
	TODO;
}
void yank_text(unsigned long passes, int index){
	TODO;
}
void yank_file(unsigned long passes, int index){
	TODO;
}
void paste(){
	TODO;
}
void search(){
	TODO;
}
void search_next(){
	TODO;
}
void search_previous(){
	TODO;
}
void jmp_file_index(){
	TODO;
}