Command command_from_str(char const *str) {
	// @OPTIMIZE: sort command_names, do a binary search
	for (int i = 0; i < CMD_COUNT; ++i) {
		if (streq(command_names[i].name, str))
			return command_names[i].cmd;
	}
	return CMD_UNKNOWN;
}

// Returns string representation of command
char const *command_to_str(Command c) {
	// NOTE: this probably won't need to be optimized.
	for (int i = 0; i < CMD_COUNT; ++i) {
		if (command_names[i].cmd == c)
			return command_names[i].name;
	}
	return "???";
}

void command_execute(Ted *ted, Command c, i64 argument) {
	TextBuffer *buffer = ted->active_buffer;
	FileSelector *file_selector = &ted->file_selector;
	Settings *settings = &ted->settings;


	switch (c) {
	case CMD_UNKNOWN:
	case CMD_COUNT:
		assert(0);
		break;
	case CMD_NOOP:
		break;
	
	case CMD_LEFT:
		if (buffer) buffer_cursor_move_left(buffer, argument);
		break;
	case CMD_RIGHT:
		if (buffer) buffer_cursor_move_right(buffer, argument);
		break;
	case CMD_UP:
		if (file_selector->open) file_selector_up(ted, file_selector, argument);
		else if (buffer) buffer_cursor_move_up(buffer, argument);
		break;
	case CMD_DOWN:
		if (file_selector->open) file_selector_down(ted, file_selector, argument);
		else if (buffer) buffer_cursor_move_down(buffer, argument);
		break;
	case CMD_SELECT_LEFT:
		if (buffer) buffer_select_left(buffer, argument);
		break;
	case CMD_SELECT_RIGHT:
		if (buffer) buffer_select_right(buffer, argument);
		break;
	case CMD_SELECT_UP:
		if (buffer) buffer_select_up(buffer, argument);
		break;
	case CMD_SELECT_DOWN:
		if (buffer) buffer_select_down(buffer, argument);
		break;
	case CMD_LEFT_WORD:
		if (buffer) buffer_cursor_move_left_words(buffer, argument);
		break;
	case CMD_RIGHT_WORD:
		if (buffer) buffer_cursor_move_right_words(buffer, argument);
		break;
	case CMD_SELECT_LEFT_WORD:
		if (buffer) buffer_select_left_words(buffer, argument);
		break;
	case CMD_SELECT_RIGHT_WORD:
		if (buffer) buffer_select_right_words(buffer, argument);
		break;
	case CMD_START_OF_LINE:
		if (buffer) buffer_cursor_move_to_start_of_line(buffer);
		break;
	case CMD_END_OF_LINE:
		if (buffer) buffer_cursor_move_to_end_of_line(buffer);
		break;
	case CMD_SELECT_START_OF_LINE:
		if (buffer) buffer_select_to_start_of_line(buffer);
		break;
	case CMD_SELECT_END_OF_LINE:
		if (buffer) buffer_select_to_end_of_line(buffer);
		break;
	case CMD_START_OF_FILE:
		if (buffer) buffer_cursor_move_to_start_of_file(buffer);
		break;
	case CMD_END_OF_FILE:
		if (buffer) buffer_cursor_move_to_end_of_file(buffer);
		break;
	case CMD_SELECT_START_OF_FILE:
		if (buffer) buffer_select_to_start_of_file(buffer);
		break;
	case CMD_SELECT_END_OF_FILE:
		if (buffer) buffer_select_to_end_of_file(buffer);
		break;
	case CMD_SELECT_ALL:
		if (buffer) buffer_select_all(buffer);
		break;

	case CMD_TAB:
		buffer_insert_char_at_cursor(buffer, '\t');
		break;
	case CMD_NEWLINE:
		if (!buffer) {
		} else if (buffer->is_line_buffer) {
			switch (ted->menu) {
			case MENU_NONE:
				assert(0);
				break;
			case MENU_OPEN:
			case MENU_SAVE_AS: {
				ted->file_selector.submitted = true;
			} break;
			}
		} else {
			buffer_newline(buffer);
		}
		break;

	case CMD_BACKSPACE:
		if (buffer) buffer_backspace_at_cursor(buffer, argument);
		break;
	case CMD_DELETE:
		if (buffer) buffer_delete_chars_at_cursor(buffer, argument);
		break;
	case CMD_BACKSPACE_WORD:
		if (buffer) buffer_backspace_words_at_cursor(buffer, argument);
		break;
	case CMD_DELETE_WORD:
		if (buffer) buffer_delete_words_at_cursor(buffer, argument);
		break;

	case CMD_PAGE_DOWN:
		if (buffer) buffer_page_down(buffer, argument);
		break;
	case CMD_PAGE_UP:
		if (buffer) buffer_page_up(buffer, argument);
		break;
	
	case CMD_OPEN:
		menu_open(ted, MENU_OPEN);
		break;
	case CMD_NEW:
		ted_new_file(ted);
		break;
	case CMD_SAVE:
		if (buffer) {
			if (buffer->filename && streq(buffer->filename, "Untitled")) {
				// don't worry, this won't catch files called "Untitled"; buffer->filename is the full path.
				goto save_as;
			}
			buffer_save(buffer);
		}
		break;
	case CMD_SAVE_AS:
	save_as:
		if (buffer && !buffer->is_line_buffer) {
			menu_open(ted, MENU_SAVE_AS);
		}
		break;
	case CMD_UNDO:
		if (buffer) buffer_undo(buffer, argument);
		break;
	case CMD_REDO:
		if (buffer) buffer_redo(buffer, argument);
		break;
	case CMD_COPY:
		if (buffer) buffer_copy(buffer);
		break;
	case CMD_CUT:
		if (buffer) buffer_cut(buffer);
		break;
	case CMD_PASTE:
		// @TEST @TODO: delete me
		ted_seterr(ted, "Very long test error the quick brown fox jumps over the lazy dog. ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz. Thank you very much. It was the best of times. It was the worst of times. It was the age of reason. It was the age of foolishness.");

		if (buffer) buffer_paste(buffer);
		break;
	
	case CMD_TEXT_SIZE_INCREASE: {
		i64 new_text_size = settings->text_size + argument;
		if (new_text_size >= TEXT_SIZE_MIN && new_text_size <= TEXT_SIZE_MAX) {
			settings->text_size = (u16)new_text_size;
			ted_load_fonts(ted);
		}
	} break;
	case CMD_TEXT_SIZE_DECREASE: {
		i64 new_text_size = settings->text_size - argument;	
		if (new_text_size >= TEXT_SIZE_MIN && new_text_size <= TEXT_SIZE_MAX) {
			settings->text_size = (u16)new_text_size;
			ted_load_fonts(ted);
		}
	} break;
	
	case CMD_ESCAPE:
		if (*ted->error_shown) {
			// dismiss error box
			*ted->error_shown = '\0';
		} else if (ted->menu) {
			menu_escape(ted);
		} else if (buffer) {
			buffer_disable_selection(buffer);
		}
		break;
	}
}