# # ⚠ Warning
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
# LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
# NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# [🥭 Mango Markets](https://mango.markets/) support is available at:
#   [Docs](https://docs.mango.markets/)
#   [Discord](https://discord.gg/67jySBhxrg)
#   [Twitter](https://twitter.com/mangomarkets)
#   [Github](https://github.com/blockworks-foundation)
#   [Email](mailto:hello@blockworks.foundation)

import typing

from datetime import datetime, timedelta
from decimal import Decimal
from solana.publickey import PublicKey

from .accountinfo import AccountInfo
from .addressableaccount import AddressableAccount
from .context import Context
from .datetimes import utc_now
from .group import GroupSlot, Group
from .instrumentvalue import InstrumentValue
from .layouts import layouts
from .metadata import Metadata
from .observables import Disposable
from .tokens import Instrument, Token
from .tokenbank import TokenBank
from .version import Version
from .websocketsubscription import (
    WebSocketAccountSubscription,
    WebSocketSubscriptionManager,
)


class LiquidityMiningInfo:
    def __init__(
        self,
        version: Version,
        rate: Decimal,
        max_depth_bps: Decimal,
        period_start: datetime,
        target_period_length: timedelta,
        mngo_left: InstrumentValue,
        mngo_per_period: InstrumentValue,
    ) -> None:
        self.version: Version = version

        self.rate: Decimal = rate
        self.max_depth_bps: Decimal = max_depth_bps
        self.period_start: datetime = period_start
        self.target_period_length: timedelta = target_period_length
        self.mngo_left: InstrumentValue = mngo_left
        self.mngo_per_period: InstrumentValue = mngo_per_period

    @staticmethod
    def from_layout(
        layout: typing.Any, version: Version, mngo: Token
    ) -> "LiquidityMiningInfo":
        rate: Decimal = layout.rate
        max_depth_bps: Decimal = layout.max_depth_bps
        period_start: datetime = layout.period_start
        target_period_length: timedelta = timedelta(
            seconds=float(layout.target_period_length)
        )
        mngo_left: InstrumentValue = InstrumentValue(
            mngo, mngo.shift_to_decimals(layout.mngo_left)
        )
        mngo_per_period: InstrumentValue = InstrumentValue(
            mngo, mngo.shift_to_decimals(layout.mngo_per_period)
        )

        return LiquidityMiningInfo(
            version,
            rate,
            max_depth_bps,
            period_start,
            target_period_length,
            mngo_left,
            mngo_per_period,
        )

    def __str__(self) -> str:
        # Some calculations here are basd on this message from 0xHiroku#0491 on Discord:
        #   https://discord.com/channels/791995070613159966/873184582948765736/889864341451599912
        #
        #   // mngoLeft, mngoPerPeriod, periodStart, targetPeriodLength from PerpMarket.liquidityMiningInfo
        #
        #   portion_given = 1 - mngoLeft / mngoPerPeriod
        #   elapsed = (<current_time> - periodStart) / targetPeriodLength
        #   est_next = elapsed / portion_given - elapsed
        now: datetime = utc_now().replace(microsecond=0)
        mngo_distributed: InstrumentValue = self.mngo_per_period - self.mngo_left
        proportion_distributed: Decimal = Decimal(0)
        elapsed: timedelta = now - self.period_start
        elapsed_seconds: float = elapsed.total_seconds()
        rounded_elapsed: timedelta = timedelta(seconds=int(elapsed_seconds))
        estimated_duration_seconds: float = elapsed_seconds
        estimated_duration: timedelta = timedelta(
            seconds=int(estimated_duration_seconds)
        )
        estimated_remaining_seconds: float = (
            estimated_duration_seconds - elapsed_seconds
        )
        estimated_remaining: timedelta = timedelta(
            seconds=int(estimated_remaining_seconds)
        )
        estimated_end: datetime = now + estimated_remaining
        if self.mngo_per_period.value != 0:
            proportion_distributed = mngo_distributed.value / self.mngo_per_period.value
            estimated_duration_seconds = elapsed_seconds / float(proportion_distributed)
            estimated_duration = timedelta(seconds=int(estimated_duration_seconds))
            estimated_remaining_seconds = estimated_duration_seconds - elapsed_seconds
            estimated_remaining = timedelta(seconds=int(estimated_remaining_seconds))
            estimated_end = now + estimated_remaining
        return f"""« LiquidityMiningInfo {self.version}
    Period Start     : {self.period_start}
    Period End (Est.): {estimated_end}
    Target Duration  : {self.target_period_length} hours
    Elapsed          : {rounded_elapsed} hours
    Duration (Est.)  : {estimated_duration} hours
    Remaining (Est.) : {estimated_remaining} hours
    Max Depth Bps    : {self.max_depth_bps}
    MNGO Per Period  : {self.mngo_per_period}
    MNGO Remaining   : {self.mngo_left}
    MNGO Distributed : {mngo_distributed}
    % Distributed    : {proportion_distributed:.2%}
    Rate             : {self.rate}
»"""


# # 🥭 PerpMarketDetails class
#
# `PerpMarketDetails` holds details of a particular perp market.
#
class PerpMarketDetails(AddressableAccount):
    def __init__(
        self,
        account_info: AccountInfo,
        version: Version,
        meta_data: Metadata,
        group: Group,
        bids: PublicKey,
        asks: PublicKey,
        event_queue: PublicKey,
        base_lot_size: Decimal,
        quote_lot_size: Decimal,
        long_funding: Decimal,
        short_funding: Decimal,
        open_interest: Decimal,
        last_updated: datetime,
        seq_num: Decimal,
        fees_accrued: Decimal,
        liquidity_mining_info: LiquidityMiningInfo,
        mngo_vault: PublicKey,
    ) -> None:
        super().__init__(account_info)
        self.version: Version = version

        self.meta_data: Metadata = meta_data
        self.group: Group = group
        self.bids: PublicKey = bids
        self.asks: PublicKey = asks
        self.event_queue: PublicKey = event_queue
        self.base_lot_size: Decimal = base_lot_size
        self.quote_lot_size: Decimal = quote_lot_size
        self.long_funding: Decimal = long_funding
        self.short_funding: Decimal = short_funding
        self.open_interest: Decimal = open_interest
        self.last_updated: datetime = last_updated
        self.seq_num: Decimal = seq_num
        self.fees_accrued: Decimal = fees_accrued
        self.liquidity_mining_info: LiquidityMiningInfo = liquidity_mining_info
        self.mngo_vault: PublicKey = mngo_vault

        slot: GroupSlot = group.slot_by_perp_market_address(self.address)
        if slot is None:
            raise Exception(
                f"Could not find slot for perp market {self.address} in group {group.address}."
            )

        self.market_index: int = slot.index

        self.base_instrument: Instrument = slot.base_instrument
        self.base_token: typing.Optional[TokenBank] = slot.base_token_bank
        self.quote_token: TokenBank = group.shared_quote

    @staticmethod
    def from_layout(
        layout: typing.Any, account_info: AccountInfo, version: Version, group: Group
    ) -> "PerpMarketDetails":
        meta_data = Metadata.from_layout(layout.meta_data)
        bids: PublicKey = layout.bids
        asks: PublicKey = layout.asks
        event_queue: PublicKey = layout.event_queue
        base_lot_size: Decimal = layout.base_lot_size
        quote_lot_size: Decimal = layout.quote_lot_size

        long_funding: Decimal = layout.long_funding
        short_funding: Decimal = layout.short_funding
        open_interest: Decimal = layout.open_interest
        last_updated: datetime = layout.last_updated
        seq_num: Decimal = layout.seq_num

        fees_accrued: Decimal = layout.fees_accrued
        liquidity_mining_info: LiquidityMiningInfo = LiquidityMiningInfo.from_layout(
            layout.liquidity_mining_info, Version.V1, group.liquidity_incentive_token
        )
        mngo_vault: PublicKey = layout.mngo_vault

        return PerpMarketDetails(
            account_info,
            version,
            meta_data,
            group,
            bids,
            asks,
            event_queue,
            base_lot_size,
            quote_lot_size,
            long_funding,
            short_funding,
            open_interest,
            last_updated,
            seq_num,
            fees_accrued,
            liquidity_mining_info,
            mngo_vault,
        )

    @staticmethod
    def parse(account_info: AccountInfo, group: Group) -> "PerpMarketDetails":
        data = account_info.data
        if len(data) != layouts.PERP_MARKET.sizeof():
            raise Exception(
                f"PerpMarketDetails data length ({len(data)}) does not match expected size ({layouts.PERP_MARKET.sizeof()})"
            )

        layout = layouts.PERP_MARKET.parse(data)
        return PerpMarketDetails.from_layout(layout, account_info, Version.V1, group)

    @staticmethod
    def load(context: Context, address: PublicKey, group: Group) -> "PerpMarketDetails":
        account_info = AccountInfo.load(context, address)
        if account_info is None:
            raise Exception(
                f"PerpMarketDetails account not found at address '{address}'"
            )
        return PerpMarketDetails.parse(account_info, group)

    def subscribe(
        self,
        context: Context,
        websocketmanager: WebSocketSubscriptionManager,
        callback: typing.Callable[["PerpMarketDetails"], None],
    ) -> Disposable:
        def __parser(account_info: AccountInfo) -> PerpMarketDetails:
            return PerpMarketDetails.parse(account_info, self.group)

        subscription = WebSocketAccountSubscription(context, self.address, __parser)
        websocketmanager.add(subscription)
        subscription.publisher.subscribe(on_next=callback)  # type: ignore[call-arg]

        return subscription

    def __str__(self) -> str:
        liquidity_mining_info: str = f"{self.liquidity_mining_info}".replace(
            "\n", "\n        "
        )
        return f"""« PerpMarketDetails {self.version} [{self.address}]
    {self.meta_data}
    Group: {self.group.address}
    Bids: {self.bids}
    Asks: {self.asks}
    Event Queue: {self.event_queue}
    Long Funding: {self.long_funding}
    Short Funding: {self.short_funding}
    Open Interest: {self.open_interest}
    Base Lot Size: {self.base_lot_size}
    Quote Lot Size: {self.quote_lot_size}
    Last Updated: {self.last_updated}
    Seq Num: {self.seq_num}
    Fees Accrued: {self.fees_accrued}
    MNGO Vault: {self.mngo_vault}
        {liquidity_mining_info}
»"""
