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import typing

from solana.publickey import PublicKey


# # 🥭 encode_public_key_for_sorting function
#
# This is fairly nasty and unintuitive.
#
# ConsumeEvents in Serum takes in a list of OpenOrders addresses but (since it runs a binary
# search on them) they have to be sorted. Calling it in Rust uses a BTreeSet to build the
# sorted list, but it builds it from the underlying integers of the PublicKey.
#
# Every PublicKey is 32 bytes long. The 'raw' view in Rust is an array of 4 8-byte words
# expressed as integers.
#
# When the BTreeSet orders these, it uses the underlying 4 ints.
#
# So when we want to provide a sorted array to ConsumeEvents, we need to sort it the same way.
#
def encode_public_key_for_sorting(address: PublicKey) -> typing.List[int]:
    raw = bytes(address)
    return [
        int.from_bytes(raw[0:8], "little"),
        int.from_bytes(raw[8:16], "little"),
        int.from_bytes(raw[16:24], "little"),
        int.from_bytes(raw[24:32], "little")
    ]