/*
Copyright (c) 2023 : Ognjen 'xolatile' Milan Robovic

Xource is free software! You will redistribute it or modify it under the terms of the GNU General Public License by Free Software Foundation.
And when you do redistribute it or modify it, it will use either version 3 of the License, or (at yours truly opinion) any later version.
It is distributed in the hope that it will be useful or harmful, it really depends... But no warranty what so ever, seriously. See GNU/GPLv3.
*/

#include <xolatile/xtandard.c>
#include <xolatile/xyntax.c>
#include <xolatile/xurses.c>

#define CONTROL     (0X1F)
#define ESCAPE      (0X1B)
#define BACKSPACE   (0X7F)
#define ARROW_UP    (0X415B1B)
#define ARROW_DOWN  (0X425B1B)
#define ARROW_RIGHT (0X435B1B)
#define ARROW_LEFT  (0X445B1B)

int main (int argc, char * * argv) {
	char * keywords [] = {
		"register",         "volatile",         "auto",             "const",            "static",           "extern",           "if",               "else",
		"do",               "while",            "for",              "continue",         "switch",           "case",             "default",          "break",
		"enum",             "union",            "struct",           "typedef",          "goto",             "void",             "return",           "sizeof",
		"char",             "short",            "int",              "long",             "signed",           "unsigned",         "float",            "double"
	};

	int cursor   = 0;
	int cursor_x = 0;
	int cursor_y = 0;

	if (argc == 2) {
		file_list_import (argv [1]);
	} else {
		out ("ARGUMENTS\n", 10);
		return (-1);
	}

	syntax_define_separators (".,:;<=>+-*/%!&~^?|()[]{}'\" \t\r\n");

	syntax_define_range ("/*", "*/", '\0', COLOUR_GREY, EFFECT_BOLD);
	syntax_define_range ("//", "\n", '\0', COLOUR_GREY, EFFECT_BOLD);
	syntax_define_range ("#",  "\n", '\\', COLOUR_PINK, EFFECT_NORMAL);
	syntax_define_range ("'",  "'",  '\\', COLOUR_PINK, EFFECT_BOLD);

	syntax_define_operators (".,:;<=>+*-/%!&~^?|()[]{}", COLOUR_YELLOW, EFFECT_NORMAL);

	syntax_define_words (keywords, (int) (sizeof (keywords) / sizeof (keywords [0])), COLOUR_YELLOW, EFFECT_BOLD);

	syntax_define_default (1, COLOUR_RED, EFFECT_NORMAL, COLOUR_CYAN, EFFECT_BOLD);

	curses_configure ();

	do {
		int offset, select, length, cursor_on_new_line;

		curses_render_background (' ', COLOUR_WHITE, EFFECT_NORMAL);

		length = 0;
		curses_render_string (file_list_name [file_list_active], COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += string_length (file_list_name [file_list_active]);
		/*  */
		curses_render_string (" $ ", COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += 3;
		curses_render_string (number_to_string (file_list_size [file_list_active]), COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += string_length (number_to_string (file_list_size [file_list_active]));
		/*  */
		curses_render_string (" O ", COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += 3;
		curses_render_string (number_to_string (cursor), COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += string_length (number_to_string (cursor));
		/*  */
		curses_render_string (" X ", COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += 3;
		curses_render_string (number_to_string (cursor_x), COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += string_length (number_to_string (cursor_x));
		/*  */
		curses_render_string (" Y ", COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += 3;
		curses_render_string (number_to_string (cursor_y), COLOUR_WHITE, EFFECT_REVERSE, length, 0);
		length += string_length (number_to_string (cursor_y));

		for (offset = length; offset != curses_screen_width; ++offset) {
			curses_render_string (" ", COLOUR_WHITE, EFFECT_REVERSE, offset, 0);
		}

		for (offset = 1; offset != curses_screen_height; ++offset) {
			curses_render_string (string_realign (number_to_string (offset), 4, ' '), COLOUR_WHITE, EFFECT_REVERSE, 0, offset);
		}

		cursor_x = curses_realign_x = 5; /* Border offset... */
		cursor_y = curses_realign_y = 1;

		for (offset = 0; file_list_data [file_list_active] [offset] != '\0'; offset += length) {
			if (cursor_y > curses_screen_height - 2) {
				break;
			}

			select = syntax_select (& file_list_data [file_list_active] [offset], & length);

			if (select >= syntax_count) {
				curses_render_string_point (& file_list_data [file_list_active] [offset], length, COLOUR_WHITE, EFFECT_NORMAL, & cursor_x, & cursor_y);
			} else {
				curses_render_string_point (& file_list_data [file_list_active] [offset], length, syntax_colour [select], syntax_effect [select], & cursor_x, & cursor_y);
			}
		}

		if (cursor_y < curses_screen_height) {
			for (offset = ++cursor_y; offset != curses_screen_height; ++offset) {
				curses_render_string ("   ~", COLOUR_WHITE, EFFECT_REVERSE, 0, offset);
			}
		}

		cursor_on_new_line = (file_list_data [file_list_active] [cursor] == '\n');

		cursor_y = character_count (file_list_data [file_list_active], '\n', 0, cursor + cursor_on_new_line, '\0') - cursor_on_new_line;
		cursor_x = character_count (file_list_data [file_list_active], '\0', cursor - cursor_on_new_line, 0, '\n') + cursor_on_new_line;
/*
		dump ("a.log", string_concatenate (number_to_string (cursor_x), "\n"));
*/
		curses_render_cursor (cursor_x + curses_realign_x, cursor_y + curses_realign_y);

		curses_synchronize ();

		if (curses_character == (int) ('Q' & CONTROL)) {
			curses_active = 0;
		} else if (curses_character == (int) '\r') {
			file_list_insert_character ('\n', cursor);
			++cursor;
		} else if (curses_character == (int) ('S' & CONTROL)) {
			file_list_export (file_list_name [file_list_active]);
		} else if (curses_character == BACKSPACE) {
			file_list_remove_character (cursor);
			--cursor;
		} else if (curses_character == ARROW_UP) {
			cursor -= character_count (file_list_data [file_list_active], '\0', cursor - 1, 0, '\n') - 1;
		} else if (curses_character == ARROW_DOWN) {
			cursor += character_count (file_list_data [file_list_active], '\0', cursor, file_list_size [file_list_active] - 1, '\n') + 1;
		} else if (curses_character == ARROW_RIGHT) {
			++cursor;
		} else if (curses_character == ARROW_LEFT) {
			--cursor;
		} else if (character_is_visible ((char) curses_character) != 0) {
			file_list_insert_character ((char) curses_character, cursor);
			++cursor;
		} else {
			continue;
		}

		limit (& cursor, 0, file_list_size [file_list_active] - 1);
	} while (curses_active != 0);

	file_list_delete ();

	syntax_delete ();

	return (EXIT_SUCCESS);
}