/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * AnnaConnect is a silly little text-based connect 4 game c:
 * Copyright (C) 2025 Anna Snoeijs. anna.snoeijs@hotmail.com
 *
 * This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 2 of the License
 *  (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
#include "ui.h"
#include <stdio.h>
#include <unistd.h>
#include "macros.h"

#define BOARD_WIDTH_CHARS ( 3 * board.columns + 6 )
#define SCOREBOARD_OFFSET 5
#define SCOREBOARD_WIDTH  27
#define SCOREBOARD_HEIGHT 9

void initBoard( const board_t board ){
	for( int i = SCOREBOARD_HEIGHT - ( board.rows + 2 ); i > 0; i-- )
		putchar( '\n' );
	printf( "\n   " );
	for( int column = 0; column < board.columns; column++ )
		printf( "%2d ", column + FIRST_NUMBER );
	putchar( '\n' );
	for( int row = board.rows - 1; row > -1; row-- ){
		// begin row
		printf( "%2d " , row + FIRST_NUMBER );
		for( int column = 0; column < board.columns; column++ )
			printf( "[ ]" );
		// end of row
		printf( "%2d" , row + FIRST_NUMBER );
		switch( row ){
		}
		putchar( '\n' );
	}
	// end of board
	printf( "   " );
	for( int column = 0; column < board.columns; column++ )
		printf( "%2d ", column + FIRST_NUMBER );
#define SCOREBOARD_LINE_END "\033[B\033["XSTR(SCOREBOARD_WIDTH)"D"
	printf("\033["XSTR(SCOREBOARD_OFFSET)"C\033["XSTR(SCOREBOARD_HEIGHT)"A"
		"┌───────────────┬────┬────┐"SCOREBOARD_LINE_END
		"│ player        │  0 │  1 │"SCOREBOARD_LINE_END
		"├───────────────┼────┼────┤"SCOREBOARD_LINE_END
		"│ vertical      │    │    │"SCOREBOARD_LINE_END
		"│ horizontal    │    │    │"SCOREBOARD_LINE_END
		"│ diagonal up   │    │    │"SCOREBOARD_LINE_END
		"│ diagonal down │    │    │"SCOREBOARD_LINE_END
		"├───────────────┼────┼────┤"SCOREBOARD_LINE_END
		"│ total         │    │    │"SCOREBOARD_LINE_END
		"└───────────────┴────┴────┘"SCOREBOARD_LINE_END
	);
#undef SCOREBOARD_LINE_END
	putchar( '\n' );
	putchar( '\n' );
}

void updateBoard(
	const wins_t wins,
	const board_t board,
	const int column
){
	int height = board.height [ column ];
	printf(
		"\033[%dA\033[%dC%c\033[%dB",
		height + 3,
		column * 3 + 4,
		'0' + !!( board.player ),
		height + 1
	);
	printf(
		"\r\033[7A\033[%dC"
		"%3d │%3d\033[B\033[8D"
		"%3d │%3d\033[B\033[8D"
		"%3d │%3d\033[B\033[8D"
		"%3d │%3d\033[2B\033[8D"
		"%3d │%3d\033[2B"
		,( 3 * board.columns + 6 ) + SCOREBOARD_WIDTH - 8
		,wins.count0.vertical,     wins.count1.vertical
		,wins.count0.horizontal,   wins.count1.horizontal
		,wins.count0.diagonalUp,   wins.count1.diagonalUp
		,wins.count0.diagonalDown, wins.count1.diagonalDown
		,wins.count0.total,        wins.count1.total
	);
	printf( "\033[2K\n" );
}

int askColumn(
	const board_t board
){
	int column;
	for(;;){
		printf( "Wher player %d put? ", board.player );
		printf( "\033[K" ); // clear everything after cursor
		fflush( stdout );
		column = -1;
		for( char ch = '0'; ch != '\n'; read( STDIN_FILENO, &ch, 1 ) ){
			if( ch >= '0' && ch <= '9' ){
				if( column == -1 )
					column = 0;
				else
					column *= 10;
				if( column >= 0 )
					column += ( int )( ch - '0' );
			} else {
				column = -2;
			}
		}
		column -= FIRST_NUMBER;
		if( column >= 0 && column < board.columns )
			if( board.height [ column ] < board.rows )
				return column;
			else printf( "\033[2Apls enter a column that ain't full" );
		else
			printf( "\033[2Apls enter valid column" );
		printf( "\033[K\n" );
	}
}

#undef BOARD_WIDTH_CHARS
#undef SCOREBOARD_OFFSET
#undef SCOREBOARD_WIDTH
#undef SCOREBOARD_HEIGHT