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#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "response.h"
#include "../fen.h"
#include "../bitboard.h"
void apply_option(uci_state *state, char *name, char *buffer) {
int settings_count = sizeof(state->option_settings)/sizeof(option_setting_t);
for (int i = 0; i < settings_count; i++) {
option_setting_t setting = state->option_settings[i];
if (strcmp(setting.option_name, name)) continue;
if (OPTION_SPIN == setting.type) {
option_spin_setting_t data = setting.data.spin;
int num = atoi(buffer);
if (num < data.min) return;
if (num > data.max) return;
*setting.value.spin = num;
} else if (OPTION_COMBO == setting.type) {
option_combo_setting_t data = setting.data.combo;
for (int j = 0; j < data.count; j++) {
if (strcmp(data.combination[i], buffer)) continue;
*setting.value.combo = j;
}
} else if (OPTION_CHECK == setting.type) {
*setting.value.check = strcmp(buffer, "true") == 0;
} else if (OPTION_STRING == setting.type) {
free(setting.value.string->data);
setting.value.string->length = strlen(buffer);
setting.value.string->data = malloc(setting.value.string->length);
memcpy(setting.value.string->data, buffer, setting.value.string->length);
} else if (OPTION_BUTTON == setting.type) {
*setting.value.button = true;
} else { assert(0); }
return;
}
if (state->debug) {
printf("debug: invalid option\n");
}
}
// examples from uci_min.txt
// option name Nullmove type check default true\n
// option name Selectivity type spin default 2 min 0 max 4\n
// option name Style type combo default Normal var Solid var Normal var Risky\n
// option name NalimovPath type string default c:\\n
// option name Clear Hash type button\n
void print_setting(option_setting_t setting) {
printf("option name %s type ", setting.option_name);
// accidently did the yoda style if statement, i am keeping it
if (OPTION_SPIN == setting.type) {
option_spin_setting_t data = setting.data.spin;
printf(
"spin default %d min %d max %d\n",
data.default_value,
data.min,
data.max
);
} else if (OPTION_COMBO == setting.type) {
option_combo_setting_t data = setting.data.combo;
printf("combo default %s", data.combination[data.default_index]);
for (int i = 0; i < data.count; i++) {
printf(" var %s", data.combination[i]);
}
printf("\n");
} else if (OPTION_CHECK == setting.type) {
printf("check default %d\n", setting.data.check_default);
} else if (OPTION_STRING == setting.type) {
printf("string default %s\n", setting.data.string_default);
} else if (OPTION_BUTTON == setting.type) {
printf("button\n");
} else { assert(0); }
}
enum {
STATE_INITIAL,
STATE_IDLE,
STATE_SYNC,
STATE_PING,
STATE_ACTIVE,
STATE_HALT,
};
int current_state = STATE_INITIAL;
void handle_uci(uci_state *state, ucicmd cmd) {
if (current_state == STATE_INITIAL) {
return handle_initial(state, cmd);
}
if (current_state == STATE_IDLE) {
return handle_idle(state, cmd);
}
if (current_state == STATE_SYNC) {
return handle_sync(state, cmd);
}
if (current_state == STATE_PING) {
return handle_ping(state, cmd);
}
if (current_state == STATE_ACTIVE) {
return handle_active(state, cmd);
}
return handle_halt(state, cmd);
}
void handle_initial(uci_state *state, ucicmd cmd) {
if (cmd.empty || strcmp(cmd.root, "uci") != 0) return;
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 5 SECONDS
printf("id name %s\n", state->name);
printf("id author %s\n", state->author);
int settings_count = sizeof(state->option_settings)/sizeof(option_setting_t);
for (int i = 0; i < settings_count; i++) {
print_setting(state->option_settings[i]);
}
// ---
printf("uciok\n");
current_state = STATE_IDLE;
}
void handle_idle(uci_state *state, ucicmd cmd) {
if (cmd.empty) return;
if (strcmp(cmd.root, "debug") == 0) {
state->debug = strcmp(ucicmd_get_arg(cmd, 0), "on") == 0;
} else if (strcmp(cmd.root, "setoption") == 0) {
char buffer[2048] = {0};
char name[64] = {0};
char *cursor = name;
for (int i = 1; i < cmd.args_count; i++) {
assert((long)cursor - (long)buffer < 2048);
char *arg = ucicmd_get_arg(cmd, i);
if (strcmp(arg, "value") == 0) {
*(--cursor) = 0;
cursor = buffer;
continue;
}
cursor = stpncpy(cursor, arg, MAX_TOKEN_SIZE);
*(cursor++) = ' ';
}
*(--cursor) = 0;
apply_option(state, name, buffer);
} else if (strcmp(cmd.root, "ucinewgame") == 0) {
// clear game state here
} else if (strcmp(cmd.root, "position") == 0) {
int k = 0;
char* mode = ucicmd_get_arg(cmd, 0);
if (strcmp(mode, "startpos") == 0) {
state->position = load_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
}
else if (strcmp(mode, "fen") == 0) {
state->position = load_fen(ucicmd_get_arg(cmd, k++));
} else { assert(0); }
if (cmd.args_count >= k) return;
assert(strcmp(ucicmd_get_arg(cmd, k++), "moves") == 0);
struct uci_move *moves = malloc((cmd.args_count - k) * sizeof(struct uci_move));
int l = 0;
for (; k < cmd.args_count; k++) {
char* move = ucicmd_get_arg(cmd, k);
moves[l++] = (struct uci_move) {
(move[0] - 'a') * 8 + (move[1] - '1'),
(move[2] - 'a') * 8 + (move[3] - '1')
};
}
// SENT state->position & struct uci_move to ENGINE
} else if (strcmp(cmd.root, "stop") == 0) {
} else if (strcmp(cmd.root, "quit") == 0) {
free(cmd.args);
int settings_count = sizeof(state->option_settings)/sizeof(option_setting_t);
for (int i = 0; i < settings_count; i++) {
option_setting_t setting = state->option_settings[i];
if (OPTION_STRING != setting.type) continue;
free(setting.value.string->data);
}
exit(0);
} else if (strcmp(cmd.root, "isready") == 0) {
current_state = STATE_SYNC;
} else if (strcmp(cmd.root, "go") == 0) {
current_state = STATE_ACTIVE;
} else {
printf("info violation\n");
}
}
void handle_sync(uci_state *state, ucicmd cmd) {
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 5 SECONDS
// ---
printf("readyok\n");
current_state = STATE_IDLE;
}
void handle_ping(uci_state *state, ucicmd cmd) {
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 1 SECONDS
// if (TODO) {
// printf("bestmove\n");
// current_state = STATE_IDLE;
// }
// ---
printf("readyok\n");
current_state = STATE_ACTIVE;
}
void handle_active(uci_state *state, ucicmd cmd) {
if (cmd.empty) {
return;
}
// TODO: this section will call the engine to analysis
if (strcmp(cmd.root, "isready") == 0) {
current_state = STATE_PING;
} else if (strcmp(cmd.root, "stop") == 0) {
current_state = STATE_HALT;
} else {
printf("info violation\n");
}
}
void handle_halt(uci_state *state, ucicmd cmd) {
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 1 SECONDS
// ---
printf("bestmove 0000\n"); // TODO: idk get it rn
current_state = STATE_IDLE;
}
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