"""Verify extreme_fast_mode makes zero RPC calls for event-sourced tokens.

extreme_fast_mode's contract is that nothing sits between detecting a token and
submitting the buy — no reads, no price fetch. The pump.fun CreateEvent carries
the canonical creator (instruction args.creator is user-supplied and may differ),
the mayhem/cashback flags and quote_mint, so a TokenInfo built from it needs no
pre-buy curve refresh. A TokenInfo decoded from the create instruction carries
none of that, so it keeps the refresh.

Offline machine checks, no network and no funds moved:

  1. The logs parser marks CreateEvent-sourced TokenInfo as state_from_event.
  2. The instruction parser stays conservative (args.creator not canonical).
  3. The geyser parser prefers the CreateEvent from meta.log_messages.
  4. The geyser LISTENER delegates to that parser (it used to inline
     instruction decoding, bypassing the event path).
  5. The block parser rides the same CreateEvent logs.
  6. An event-sourced buy submits with ZERO curve-manager/RPC calls.
  7. A buy from a TokenInfo without the flag still refreshes from chain.
  8. trade.trust_create_event=false forces the refresh even for event data.

Usage:
    uv run tests/regression/verify_extreme_fast_zero_rpc.py
"""

import asyncio
import base64
import json
import sys
from pathlib import Path
from types import SimpleNamespace

PROJECT_ROOT = Path(__file__).resolve().parents[2]
sys.path.insert(0, str(PROJECT_ROOT / "src"))

from solders.pubkey import Pubkey  # noqa: E402
from solders.transaction import VersionedTransaction  # noqa: E402

from core.pubkeys import WSOL_MINT, SystemAddresses  # noqa: E402
from interfaces.core import Platform, TokenInfo  # noqa: E402
from platforms.pumpfun.address_provider import PumpFunAddressProvider  # noqa: E402
from platforms.pumpfun.event_parser import PumpFunEventParser  # noqa: E402
from trading import platform_aware  # noqa: E402
from trading.platform_aware import PlatformAwareBuyer  # noqa: E402
from utils.idl_manager import get_idl_manager  # noqa: E402

FIXTURE = (
    PROJECT_ROOT
    / "cookbook"
    / "pumpfun"
    / "decode"
    / "raw_create_tx_from_blocksubscribe.json"
)

PROVIDER = PumpFunAddressProvider()
TRADER = Pubkey.from_string("11111111111111111111111111111112")


def _event_parser() -> PumpFunEventParser:
    """Real pump.fun event parser with the vendored IDL, no RPC client needed."""
    return PumpFunEventParser(
        idl_parser=get_idl_manager().get_parser(Platform.PUMP_FUN)
    )


def _fixture() -> dict:
    return json.loads(FIXTURE.read_text())


def _event_sourced_token_info() -> TokenInfo:
    """Parse the fixture's CreateEvent through the real logs parser."""
    parser = _event_parser()
    return parser.parse_token_creation_from_logs(
        _fixture()["meta"]["logMessages"], signature="fixture"
    )


class _StubClient:
    """Records submissions and account reads; never touches the network."""

    def __init__(self) -> None:
        self.sent: list = []
        self.reads = 0

    async def build_and_send_transaction(
        self, instructions: list, *_args: object, **_kwargs: object
    ) -> str:
        self.sent.append(instructions)
        return "STUB_SIGNATURE"

    async def confirm_transaction(self, _signature: str, **_kwargs: object) -> bool:
        return False

    async def get_account_info(self, *_args: object, **_kwargs: object) -> None:
        self.reads += 1
        raise ValueError("unexpected RPC read in zero-RPC path")  # noqa: TRY003

    async def get_multiple_accounts(self, *_args: object, **_kwargs: object) -> None:
        self.reads += 1
        raise ValueError("unexpected RPC read in zero-RPC path")  # noqa: TRY003


class _CountingCurveManager:
    """Counts refresh calls; returns benign state."""

    def __init__(self) -> None:
        self.calls = 0

    async def get_pool_state_and_token_program(
        self,
        _pool: Pubkey,
        _mint: Pubkey,
        commitment: str | None = None,  # noqa: ARG002
    ) -> tuple[dict, Pubkey]:
        self.calls += 1
        state = {
            "creator": str(TRADER),
            "is_mayhem_mode": False,
            "is_cashback_coin": False,
            "quote_mint": WSOL_MINT,
        }
        return state, SystemAddresses.TOKEN_2022_PROGRAM

    async def get_pool_state(
        self,
        _pool: Pubkey,
        commitment: str | None = None,  # noqa: ARG002
    ) -> dict:
        self.calls += 1
        return {
            "creator": str(TRADER),
            "is_mayhem_mode": False,
            "is_cashback_coin": False,
            "quote_mint": WSOL_MINT,
        }


def _stub_implementations(curve_manager: object) -> SimpleNamespace:
    async def build_buy_instruction(*_args: object, **_kwargs: object) -> list[str]:
        return ["stub-instruction"]

    instruction_builder = SimpleNamespace(
        build_buy_instruction=build_buy_instruction,
        get_required_accounts_for_buy=lambda *_a, **_k: [],
        get_buy_compute_unit_limit=lambda _override: 100_000,
    )
    return SimpleNamespace(
        address_provider=PROVIDER,
        instruction_builder=instruction_builder,
        curve_manager=curve_manager,
    )


def _make_buyer(client: _StubClient, **kwargs: object) -> PlatformAwareBuyer:
    async def no_fee(_accounts: list) -> None:
        return None

    fee_manager = SimpleNamespace(calculate_priority_fee=no_fee)
    return PlatformAwareBuyer(
        client,
        SimpleNamespace(pubkey=TRADER, keypair=None),
        fee_manager,
        amount=0.0001,
        slippage=0.3,
        max_retries=1,
        extreme_fast_token_amount=20,
        extreme_fast_mode=True,
        **kwargs,
    )


def _run_buy(
    token_info: TokenInfo, curve_manager: object, **buyer_kwargs: object
) -> tuple[_StubClient, object]:
    client = _StubClient()
    buyer = _make_buyer(client, **buyer_kwargs)
    platform_aware.get_platform_implementations = lambda _p, _c: _stub_implementations(
        curve_manager
    )
    result = asyncio.run(buyer.execute(token_info))
    return client, result


def check_logs_parser_marks_event_state() -> bool:
    """CreateEvent-sourced TokenInfo carries everything -> flag set."""
    token_info = _event_sourced_token_info()
    if token_info is None:
        print("    fixture logs did not parse into a TokenInfo")
        return False
    ok = (
        getattr(token_info, "state_from_event", False) is True
        and token_info.quote_mint is not None
        and token_info.creator is not None
    )
    if not ok:
        print(
            f"    state_from_event={getattr(token_info, 'state_from_event', None)} "
            f"quote_mint={token_info.quote_mint} creator={token_info.creator}"
        )
    return ok


def check_instruction_parser_stays_conservative() -> bool:
    """args.creator is user-supplied, not canonical -> flag must stay unset."""
    fixture = _fixture()
    raw = base64.b64decode(fixture["transaction"][0])
    tx = VersionedTransaction.from_bytes(raw)
    msg = tx.message
    account_keys = [bytes(k) for k in msg.account_keys]
    parser = _event_parser()
    for ix in msg.instructions:
        # The fixture's create_v2 omits the trailing is_cashback_enabled
        # OptionBool — a legal wire form the decoder accepts since #184
        # (verify_create_v2_optional_args.py covers the decode itself).
        token_info = parser.parse_token_creation_from_instruction(
            bytes(ix.data), list(ix.accounts), account_keys
        )
        if token_info is not None:
            ok = getattr(token_info, "state_from_event", False) is False
            if not ok:
                print("    instruction-sourced TokenInfo must not set the flag")
            return ok
    print("    fixture create instruction did not parse")
    return False


def check_geyser_parser_prefers_event_logs() -> bool:
    """Geyser meta carries log_messages; the CreateEvent there is canonical."""
    logs = _fixture()["meta"]["logMessages"]
    stub = SimpleNamespace(
        transaction=SimpleNamespace(
            transaction=SimpleNamespace(
                transaction=SimpleNamespace(
                    message=SimpleNamespace(instructions=[], account_keys=[])
                ),
                meta=SimpleNamespace(log_messages=logs),
            )
        )
    )
    parser = _event_parser()
    token_info = parser.parse_token_creation_from_geyser(stub)
    ok = (
        token_info is not None
        and getattr(token_info, "state_from_event", False) is True
    )
    if not ok:
        print(f"    geyser parse returned {token_info}")
    return ok


def check_geyser_listener_delegates_to_parser() -> bool:
    """The listener must route updates through the event-first parser.

    Live run showed state_from_event=False on a geyser token: the listener
    inlined instruction parsing and never reached the parser's log-preferring
    geyser method.
    """
    # Imported here: the listener module pulls in grpc, which the other
    # checks don't need.
    from monitoring.universal_geyser_listener import (  # noqa: PLC0415
        UniversalGeyserListener,
    )

    listener = UniversalGeyserListener(
        geyser_endpoint="dummy:443",
        geyser_api_token="dummy",  # noqa: S106 - offline stub, never connects
        geyser_auth_type="x-token",
        platforms=[Platform.PUMP_FUN],
    )
    logs = _fixture()["meta"]["logMessages"]
    update = SimpleNamespace(
        HasField=lambda field: field == "transaction",
        transaction=SimpleNamespace(
            transaction=SimpleNamespace(
                transaction=SimpleNamespace(
                    message=SimpleNamespace(instructions=[], account_keys=[])
                ),
                meta=SimpleNamespace(log_messages=logs),
            )
        ),
    )
    token_info = asyncio.run(listener._process_update(update))  # noqa: SLF001
    ok = (
        token_info is not None
        and getattr(token_info, "state_from_event", False) is True
    )
    if not ok:
        print(f"    listener _process_update returned {token_info}")
    return ok


def check_block_parser_marks_event_state() -> bool:
    """The block listener's parse path also rides the CreateEvent logs."""
    parser = _event_parser()
    token_info = parser.parse_token_creation_from_block({"transactions": [_fixture()]})
    ok = (
        token_info is not None
        and getattr(token_info, "state_from_event", False) is True
    )
    if not ok:
        print(f"    block parse returned {token_info}")
    return ok


def check_event_sourced_buy_is_zero_rpc() -> bool:
    """The killer feature: detection -> submission with no reads at all."""
    token_info = _event_sourced_token_info()
    if token_info is None:
        print("    fixture logs did not parse into a TokenInfo")
        return False
    curve_manager = _CountingCurveManager()
    client, _result = _run_buy(token_info, curve_manager)
    ok = curve_manager.calls == 0 and client.reads == 0 and len(client.sent) == 1
    if not ok:
        print(
            f"    curve_manager.calls={curve_manager.calls} "
            f"client.reads={client.reads} submissions={len(client.sent)}"
        )
    return ok


def check_unflagged_buy_still_refreshes() -> bool:
    """Listener-guessed data must still be refreshed from chain."""
    mint = Pubkey.from_string("So11111111111111111111111111111111111111112")
    bonding_curve = PROVIDER.derive_pool_address(mint)
    token_info = TokenInfo(
        name="T",
        symbol="T",
        uri="",
        mint=mint,
        platform=Platform.PUMP_FUN,
        bonding_curve=bonding_curve,
        associated_bonding_curve=PROVIDER.derive_associated_bonding_curve(
            mint, bonding_curve, SystemAddresses.TOKEN_2022_PROGRAM
        ),
        user=TRADER,
        creator=TRADER,
        creator_vault=PROVIDER.derive_creator_vault(TRADER),
        token_program_id=SystemAddresses.TOKEN_2022_PROGRAM,
    )
    curve_manager = _CountingCurveManager()
    client, _result = _run_buy(token_info, curve_manager)
    ok = curve_manager.calls >= 1 and len(client.sent) == 1
    if not ok:
        print(
            f"    curve_manager.calls={curve_manager.calls} "
            f"submissions={len(client.sent)}"
        )
    return ok


def check_trust_flag_forces_refresh() -> bool:
    """trust_create_event=false is the escape hatch back to always-refresh."""
    token_info = _event_sourced_token_info()
    if token_info is None:
        print("    fixture logs did not parse into a TokenInfo")
        return False
    curve_manager = _CountingCurveManager()
    _client, _result = _run_buy(token_info, curve_manager, trust_create_event=False)
    ok = curve_manager.calls >= 1
    if not ok:
        print(f"    curve_manager.calls={curve_manager.calls} (expected >=1)")
    return ok


def main() -> int:
    checks = [
        ("logs parser marks CreateEvent state", check_logs_parser_marks_event_state),
        (
            "instruction parser stays conservative",
            check_instruction_parser_stays_conservative,
        ),
        (
            "geyser parser prefers CreateEvent logs",
            check_geyser_parser_prefers_event_logs,
        ),
        (
            "geyser listener delegates to event-first parser",
            check_geyser_listener_delegates_to_parser,
        ),
        ("block parser marks CreateEvent state", check_block_parser_marks_event_state),
        ("event-sourced buy makes zero RPC calls", check_event_sourced_buy_is_zero_rpc),
        ("unflagged buy still refreshes", check_unflagged_buy_still_refreshes),
        ("trust_create_event=false forces refresh", check_trust_flag_forces_refresh),
    ]
    failed = 0
    for label, check in checks:
        try:
            ok = check()
        except Exception as error:  # noqa: BLE001 - report and continue
            print(f"FAIL {label}: {type(error).__name__}: {error}")
            failed += 1
            continue
        print(f"{'PASS' if ok else 'FAIL'} {label}")
        failed += 0 if ok else 1
    print(f"\n{len(checks) - failed}/{len(checks)} checks passed")
    return 1 if failed else 0


if __name__ == "__main__":
    sys.exit(main())