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#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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import enum
import logging
import typing

from decimal import Decimal, ROUND_DOWN, ROUND_UP
from solana.publickey import PublicKey

from .constants import SOL_DECIMALS, SOL_MINT_ADDRESS


class RoundDirection(enum.Enum):
    DOWN = enum.auto()
    UP = enum.auto()

    def to_decimal_direction(self) -> str:
        if self == RoundDirection.UP:
            return ROUND_UP
        else:
            return ROUND_DOWN

    def __str__(self) -> str:
        return self.name

    def __repr__(self) -> str:
        return f"{self}"


class Instrument:
    def __init__(self, symbol: str, name: str, decimals: Decimal) -> None:
        self._logger: logging.Logger = logging.getLogger(self.__class__.__name__)
        self.symbol: str = symbol.upper()
        self.name: str = name
        self.decimals: Decimal = decimals

    @staticmethod
    def symbols_match(symbol1: str, symbol2: str) -> bool:
        return symbol1.upper() == symbol2.upper()

    def round(
        self, value: Decimal, direction: RoundDirection = RoundDirection.DOWN
    ) -> Decimal:
        # places should be a number like 0.000001
        places = Decimal(1) / (Decimal(10) ** self.decimals)
        return value.quantize(places, rounding=direction.to_decimal_direction())

    def shift_to_decimals(self, value: Decimal) -> Decimal:
        divisor = Decimal(10**self.decimals)
        shifted = value / divisor
        return shifted

    def shift_to_native(self, value: Decimal) -> Decimal:
        multiplier = Decimal(10**self.decimals)
        shifted = value * multiplier
        return round(shifted, 0)

    def symbol_matches(self, symbol: str) -> bool:
        return self.symbol.upper() == symbol.upper()

    # Instruments are equal if they have the same normalised symbol.
    def __eq__(self, other: typing.Any) -> bool:
        if isinstance(other, Instrument):
            return self.symbol == other.symbol
        return False

    def __str__(self) -> str:
        return f"« Instrument [{self.symbol}] '{self.name}' »"

    def __repr__(self) -> str:
        return f"{self}"


# # 🥭 Token class
#
# `Token` defines aspects common to every token.
#
class Token(Instrument):
    def __init__(
        self, symbol: str, name: str, decimals: Decimal, mint: PublicKey
    ) -> None:
        super().__init__(symbol, name, decimals)
        self.mint: PublicKey = mint

    def ensure(uncertain_token: Instrument) -> "Token":
        if isinstance(uncertain_token, Token):
            return uncertain_token
        raise Exception(
            f"Instrument {uncertain_token} cannot be converted to SPL Token"
        )

    @staticmethod
    def find_by_symbol(values: typing.Sequence["Token"], symbol: str) -> "Token":
        found = [value for value in values if value.symbol_matches(symbol)]
        if len(found) == 0:
            raise Exception(f"Token '{symbol}' not found in token values: {values}")

        if len(found) > 1:
            raise Exception(
                f"Token '{symbol}' matched multiple tokens in values: {values}"
            )

        return found[0]

    @staticmethod
    def find_by_mint(values: typing.Sequence["Token"], mint: PublicKey) -> "Token":
        found = [value for value in values if value.mint == mint]
        if len(found) == 0:
            raise Exception(f"Token '{mint}' not found in token values: {values}")

        if len(found) > 1:
            raise Exception(
                f"Token '{mint}' matched multiple tokens in values: {values}"
            )

        return found[0]

    # Tokens are equal if they have the same mint address.
    def __eq__(self, other: typing.Any) -> bool:
        if isinstance(other, Token):
            return self.mint == other.mint
        return False

    def __str__(self) -> str:
        return f"« Token [{self.symbol}] '{self.name}' [{self.mint} ({self.decimals} decimals)] »"


# # 🥭 SolToken object
#
# It's sometimes handy to have a `Token` for SOL, but SOL isn't actually a token and can't appear in baskets. This object defines a special case for SOL.
#
SolToken = Token("SOL", "Pure SOL", SOL_DECIMALS, SOL_MINT_ADDRESS)
