#include "everything.hpp"

// Get tab length at a certain position
count_type get_tab_length(count_type c) {
	return TAB_SIZE - (c % TAB_SIZE);
}
// Substitute tab characters into regular tabs
string substitute_tabs(string s) {
	string ret = "";
	for(count_type i = 0; i < s.size(); ++i) {
		if(s[i] == '\t') {
			count_type this_tab_length = get_tab_length(ret.size());
			for(count_type j = 0; j < this_tab_length; j++)
				ret += ' ';
		}
		else
			ret += s[i];
	}
	return ret;
}
// Get how much tabs changed position on a row
count_type get_tab_offset(count_type c, string text) {
	count_type tab_offset = 0;
	for(count_type i = 0; i + tab_offset < c; ++i) {
		if(text[i] == '\t')
			tab_offset += get_tab_length(i+tab_offset) - 1;
		if(i + tab_offset > c)
			tab_offset -= i + tab_offset - c;
	}
	return tab_offset;
}



int main(int argc, char* argv[]) {
	// Check argument
	if(argc <= 1) {
		std::cerr << "No input filename\n";
		return 1;
	}
	string filename = argv[1];

	// Check existing file
	std::ifstream infile(filename);
	if(!infile.good()) {
		std::cerr << "Bad input filename\n";
		return 1;
	}

	// Load file
	Treap file;
	string line;
	while (std::getline(infile, line))
		file.insert(file.size(), line);

	// Init
	initscr();
	refresh();

	Editor ed(filename, file);

	// Main loop
	while(ed.take_action())
		refresh();

	// End
	endwin();
	return 0;
}