import jax
import jax.numpy as jnp

import pgx
from pgx.flax.struct import dataclass

FALSE = jnp.bool_(False)
TRUE = jnp.bool_(True)


@dataclass
class State(pgx.State):
    steps: jnp.ndarray = jnp.int32(0)
    current_player: jnp.ndarray = jnp.int8(0)
    observation: jnp.ndarray = jnp.zeros(27, dtype=jnp.bool_)
    reward: jnp.ndarray = jnp.float32([0.0, 0.0])
    terminated: jnp.ndarray = FALSE
    truncated: jnp.ndarray = FALSE
    legal_action_mask: jnp.ndarray = jnp.ones(9, dtype=jnp.bool_)
    _rng_key: jax.random.KeyArray = jax.random.PRNGKey(0)
    # ---
    turn: jnp.ndarray = jnp.int8(0)
    # 8x8 board
    # [[ 0,  1,  2,  3,  4,  5,  6,  7],
    #  [ 8,  9, 10, 11, 12, 13, 14, 15],
    #  [16, 17, 18, 19, 20, 21, 22, 23],
    #  [24, 25, 26, 27, 28, 29, 30, 31],
    #  [32, 33, 34, 35, 36, 37, 38, 39],
    #  [40, 41, 42, 43, 44, 45, 46, 47],
    #  [48, 49, 50, 51, 52, 53, 54, 55],
    #  [56, 57, 58, 59, 60, 61, 62, 63]]
    board: jnp.ndarray = -jnp.ones(64, jnp.int8)  # -1 (empty), 0, 1
