#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <tak.h>

uint64_t heights[16];

// Warning: performs _no_ checks on input whatsoever
static enum E_RESULT
parse_line(char *pt, const ssize_t read) {
	ssize_t idx = 0;
	enum E_RESULT r;
	for(;;) {
		if (pt[idx] == 'P') {
			// P [A-F][1-6] [CF]?,
			idx+=2;
			enum STONE_VARIANT stone;
			const uint8_t col = pt[idx]-'A', row = pt[idx+1]-'1';

			if (idx + 3 < read) {
				switch (pt[idx+3]) {
					case 'W': { stone = STONE_STANDING; break; }
					case 'C': { stone = STONE_CAPSTONE; break; }
					default:  { stone = STONE_FLAT;     break; }
				}
			} else {
				stone = STONE_FLAT;
			}

			r = try_place(THE_COORDS(col,row), current_colour, stone);
			if (r != ACT_OK) return r;
		} else if (pt[idx] == 'M') {
			// M [A-F][1-6] [A-F][1-6]( [1-6])+,
			idx+=2;
			uint8_t drops[board_size];
			const uint8_t s_col =pt[idx]-'A', s_row=pt[idx+1]-'1',
				d_col=pt[idx+3]-'A', d_row=pt[idx+4]-'1';
			idx+=4;

			enum MOVE_DIRECTION dir;
			if (s_col < d_col) dir=M_RIGHT;
			else if (s_col > d_col) dir=M_LEFT;
			else if (s_row < d_row) dir=M_UP;
			else if (s_row > d_row) dir=M_DOWN;

			uint8_t steps = 0;
			do {
				idx+=2;
				drops[steps++] = pt[idx] - '0';
			} while (idx+2<read && pt[idx+1] != ',');

			r = try_move(THE_COORDS(s_col, s_row), dir, steps, drops);

			if (r != ACT_OK) return r;

			// Measure height of stacks exceeding 1
			for (int k = 0; k < board_size * board_size; k++) {
				if (COUNT_AT(k)>1) heights[COUNT_AT(k)]+=1;
			}
		}
		while (idx<read && pt[idx++]!=',');
		if (idx>=read) return ACT_OK;
		next_ply();
	}
	return ACT_OK;
}


int
main(int argc, char **argv) {
	(void)(argc);

	enum E_RESULT r;
	enum WIN_TYPE win;
	uint32_t games = 0, overflow=0, illegal = 0;
	uint32_t road_wins=0, flat_wins=0, road_turns=0, flat_turns=0;

	for (int k = 0; k < 16; k++) heights[k] = 0;

	FILE *playtak;
	ssize_t read;
	size_t len = 0;
	char *line = NULL;

	const uint8_t size = argv[1][0]-'0';
	playtak = fopen(argv[2], "r");
	if (playtak == NULL) exit(EXIT_FAILURE);

	while ((read = getline(&line, &len, playtak)) != -1) {
		reset_state(size);
		r = parse_line(line,read);
		if (r == ACT_ILLEGAL) {
			illegal++;
			printf("Culprit: (%ld) %s",read,line);
		} else if (r == ACT_OVERFLOW) {
			overflow++;
		} else {
			win = check_win();
			if (win == WIN_FLAT_BLACK
					|| win == WIN_FLAT_WHITE
					|| win == WIN_DRAW) {
				flat_wins++;
				flat_turns += ply/2+1;
			} else {
				road_wins++;
				road_turns += ply/2+1;
			}
		}
		games++;
	}

	fclose(playtak);
	if (line) free(line);

	printf("Read %d games\n",games);
	printf("Illegals:  %d\nOverflows: %d\nRoad wins: %d\nFlat wins: %d\n\
Average turns to road win: %.3f\nAverage turns to flat win: %f\n",
				 illegal,overflow, road_wins, flat_wins,
				 (double)(road_turns)/(double)(road_wins),
				 (double)(flat_turns)/(double)(flat_wins));
	for (int k = 2; k < 16; k++) {
		printf("Height %2d: %7ld\n",k,heights[k]);
	}

	exit(EXIT_SUCCESS);
}