from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any

from .exec_client import list_open_orders, query_order, cancel_all_orders, cancel_order, place_order, get_account_info, get_account_fees
from .news_client import call_news_tool
from .crypto_client import call_crypto_tool


def _order_ref(payload: Any) -> str | None:
    if not isinstance(payload, dict):
        return None
    for key in ("order_id", "bitstamp_order_id", "id", "client_order_id"):
        value = payload.get(key)
        if value is None:
            continue
        text = str(value).strip()
        if text:
            return text
    return None


def _cancelled_order_ids(cancel_result: Any) -> list[str]:
    if not isinstance(cancel_result, dict):
        return []
    rows = cancel_result.get("cancelled")
    if not isinstance(rows, list):
        return []
    cancelled: list[str] = []
    for row in rows:
        if not isinstance(row, dict) or not bool(row.get("ok")):
            continue
        order_id = _order_ref(row)
        if order_id is not None:
            cancelled.append(order_id)
    return cancelled


def _has_inconclusive_cancel_rows(cancel_result: Any) -> bool:
    if not isinstance(cancel_result, dict):
        return False
    rows = cancel_result.get("cancelled")
    if not isinstance(rows, list):
        return False
    return any(isinstance(row, dict) and not bool(row.get("ok")) for row in rows)


@dataclass(frozen=True)
class StrategyContext:
    id: str
    account_id: str
    client_id: str | None = field(default=None, repr=False)
    mode: str = "off"
    market_symbol: str | None = None
    base_currency: str | None = None
    counter_currency: str | None = None
    minimum_order_value: float | None = None

    def __getattr__(self, name: str):
        if name == "mode":
            return "active"
        raise AttributeError(name)

    def get_open_orders(self) -> Any:
        payload = list_open_orders(self.account_id, self.client_id)
        if isinstance(payload, dict) and isinstance(payload.get("orders"), list):
            return payload["orders"]
        return payload

    def query_order(self, order_id: str) -> Any:
        return query_order(self.account_id, order_id)

    def cancel_all_orders(self) -> Any:
        return cancel_all_orders(self.account_id, self.client_id)

    def cancel_all_orders_confirmed(self) -> dict[str, Any]:
        cancel_result = None
        cancel_error = None
        verification_error = None
        remaining_orders = None

        try:
            cancel_result = self.cancel_all_orders()
        except Exception as exc:
            cancel_error = str(exc)

        try:
            payload = self.get_open_orders()
            if isinstance(payload, list):
                remaining_orders = payload
            else:
                verification_error = f"unexpected open orders payload type: {type(payload).__name__}"
        except Exception as exc:
            verification_error = str(exc)

        cancelled_order_ids = _cancelled_order_ids(cancel_result)
        inconclusive_cancel = cancel_error is not None or _has_inconclusive_cancel_rows(cancel_result)
        conclusive = (
            not inconclusive_cancel
            and remaining_orders is not None
            and len(remaining_orders) == 0
        )
        cleanup_status = "cleanup_confirmed" if conclusive else ("cleanup_failed" if cancel_error else "cleanup_partial")
        error = None
        if not conclusive:
            if cancel_error:
                error = cancel_error
            elif _has_inconclusive_cancel_rows(cancel_result):
                error = "cancel-all reported uncancelled orders"
            elif verification_error:
                error = verification_error
            elif remaining_orders is not None:
                error = f"{len(remaining_orders)} open orders remain after cancel-all"
            else:
                error = "open order verification unavailable after cancel-all"

        return {
            "ok": cancel_error is None and verification_error is None and conclusive,
            "conclusive": conclusive,
            "cleanup_status": cleanup_status,
            "cancelled_order_ids": cancelled_order_ids,
            "remaining_orders": remaining_orders,
            "cancel_result": cancel_result,
            "cancel_error": cancel_error,
            "verification_error": verification_error,
            "error": error,
        }

    def cancel_order(self, order_id: str) -> Any:
        return cancel_order(self.account_id, order_id)

    def place_order(self, **kwargs: Any) -> Any:
        mode = getattr(self, "mode", "active")
        if mode != "active":
            raise RuntimeError(f"place_order not allowed in {mode} mode")
        kwargs.setdefault("account_id", self.account_id)
        kwargs.setdefault("client_id", self.client_id)
        return place_order(kwargs)

    def get_price(self, symbol: str) -> Any:
        return call_crypto_tool("get_price", {"symbol": symbol})

    def get_regime(self, symbol: str, timeframe: str = "1h") -> Any:
        return call_crypto_tool("get_regime", {"symbol": symbol, "timeframe": timeframe})

    def get_account_info(self) -> Any:
        return get_account_info(self.account_id)

    def get_balance_snapshot(self) -> dict[str, Any]:
        info = self.get_account_info()
        balances = info.get("balances") if isinstance(info, dict) else []
        if not isinstance(balances, list):
            balances = []
        return {
            "account_id": self.account_id,
            "market_symbol": self.market_symbol,
            "base_currency": self.base_currency,
            "counter_currency": self.counter_currency,
            "balances": balances,
        }

    def get_open_order_snapshot(self) -> dict[str, Any]:
        orders = self.get_open_orders()
        return {
            "account_id": self.account_id,
            "market_symbol": self.market_symbol,
            "open_orders": orders if isinstance(orders, list) else [],
        }

    def get_strategy_snapshot(self) -> dict[str, Any]:
        return {
            "identity": {
                "strategy_id": self.id,
                "account_id": self.account_id,
                "market": self.market_symbol,
                "base_currency": self.base_currency,
                "quote_currency": self.counter_currency,
            },
            "control": {
                "mode": getattr(self, "mode", "off"),
            },
            "position": self.get_balance_snapshot(),
            "orders": self.get_open_order_snapshot(),
        }

    def _available_balance(self, asset_code: str) -> float:
        try:
            info = self.get_account_info()
        except Exception:
            return 0.0
        balances = info.get("balances") if isinstance(info, dict) else []
        if not isinstance(balances, list):
            return 0.0
        wanted = str(asset_code or "").upper()
        for balance in balances:
            if not isinstance(balance, dict):
                continue
            if str(balance.get("asset_code") or "").upper() != wanted:
                continue
            try:
                return float(balance.get("available") if balance.get("available") is not None else balance.get("total") or 0.0)
            except Exception:
                return 0.0
        return 0.0

    def get_account_fees(self, market_symbol: str | None = None) -> Any:
        return get_account_fees(self.account_id, market_symbol)

    def get_fee_rates(self, market_symbol: str | None = None) -> dict[str, float]:
        payload = get_account_fees(self.account_id, market_symbol)
        if not isinstance(payload, dict):
            return {"maker": 0.0, "taker": 0.0}
        fees = payload.get("fees") if isinstance(payload.get("fees"), dict) else {}

        def _normalize_fee(value: object) -> float:
            try:
                rate = float(value or 0.0)
            except Exception:
                return 0.0
            if rate > 0.1:
                rate /= 100.0
            return rate

        try:
            maker = _normalize_fee(fees.get("maker"))
        except Exception:
            maker = 0.0
        try:
            taker = _normalize_fee(fees.get("taker"))
        except Exception:
            taker = 0.0
        return {"maker": maker, "taker": taker}

    def suggest_order_amount(
        self,
        *,
        side: str,
        price: float,
        levels: int,
        min_notional: float,
        fee_rate: float,
        quote_notional: float = 0.0,
        max_notional_per_order: float = 0.0,
        dust_collect: bool = False,
        order_size: float = 0.0,
        safety: float = 0.995,
        available_balances: dict[str, float] | None = None,
    ) -> float:
        """Return a conservative per-order amount for this venue/account.

        The returned amount is exchange-aware but strategy-agnostic, so other
        strategies can reuse the same sizing rules. `quote_notional` is the
        canonical quote-currency cap when a strategy wants quote-standard sizing.
        """
        if levels <= 0 or price <= 0:
            return 0.0

        side = str(side or "").strip().lower()
        fee_rate = max(float(fee_rate or 0.0), 0.0)
        quote_notional = float(quote_notional or 0.0)
        max_notional_per_order = float(max_notional_per_order or 0.0)
        order_size = float(order_size or 0.0)
        balance_overrides = {
            str(asset_code or "").upper(): max(float(amount or 0.0), 0.0)
            for asset_code, amount in dict(available_balances or {}).items()
        }
        min_amount = (min_notional / price) if min_notional > 0 else 0.0

        if side == "buy":
            quote = self.counter_currency or "USD"
            quote_available = balance_overrides.get(str(quote).upper())
            if quote_available is None:
                quote_available = self._available_balance(quote) if hasattr(self, "_available_balance") else 0.0
            spendable_quote = quote_available * safety
            quote_cap = spendable_quote if max_notional_per_order <= 0 else min(spendable_quote, max_notional_per_order)
            if quote_notional > 0:
                quote_cap = min(quote_cap, quote_notional)

            if dust_collect and max_notional_per_order > 0:
                leftover_quote = max(spendable_quote - max_notional_per_order, 0.0)
                if 0.0 < leftover_quote < min_notional:
                    quote_cap = spendable_quote
            if quote_cap <= 0:
                return 0.0
            # `max_notional_per_order` is already a per-order cap in quote
            # currency, so do not dilute it by the number of grid levels.
            per_order_quote = quote_cap
            min_quote_needed = min_notional * (1 + fee_rate)
            if per_order_quote < min_quote_needed:
                return 0.0
            amount = per_order_quote / (price * (1 + fee_rate))
        else:
            base = self.base_currency or (self.market_symbol or "XRP")
            base_available = balance_overrides.get(str(base).upper())
            if base_available is None:
                base_available = self._available_balance(base) if hasattr(self, "_available_balance") else 0.0
            spendable_base = base_available * safety
            if quote_notional > 0 and price > 0:
                spendable_base = min(spendable_base, quote_notional / price)
            if max_notional_per_order > 0 and price > 0:
                base_cap = max_notional_per_order / price
                if dust_collect:
                    leftover_base = max(spendable_base - base_cap, 0.0)
                    if 0.0 < leftover_base * price < min_notional:
                        spendable_base = spendable_base
                    else:
                        spendable_base = min(spendable_base, base_cap)
                else:
                    spendable_base = min(spendable_base, base_cap)
            if spendable_base <= 0:
                return 0.0
            # Same rule as above, the cap is per order, not per grid level.
            amount = spendable_base

        if amount < min_amount:
            return 0.0
        if order_size > 0:
            if order_size < min_amount:
                return 0.0
            amount = min(amount, order_size)
        return max(amount, 0.0)

    def get_news(self, **kwargs: Any) -> Any:
        return call_news_tool("search", kwargs)