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"""Embedding-role transport substrate for EPD (encode -> prefill).

The mechanical plumbing (the Mooncake engine + ZMQ control socket + room-keyed
status FSM, and the bootstrap rendezvous server) is the role-neutral shared base
in :mod:`tokenspeed.runtime.pd.base`; this module just layers the embedding role's
buffer args onto it. The embedding-specific *semantics* -- the wire frames and
the senders/receivers -- live in :mod:`embedding_transfer`; nothing here carries
any KV/MLA/metrics state.
"""

from __future__ import annotations

from tokenspeed.runtime.pd.base.bootstrap import DisaggBootstrapServerBase
from tokenspeed.runtime.pd.base.manager import DisaggManagerBase
from tokenspeed.runtime.pd.base.mooncake_engine import (
    MooncakeTransferEngine,
)
from tokenspeed.runtime.pd.epd.entities import EmbeddingManagerArgs
from tokenspeed.runtime.pd.utils import DisaggregationMode
from tokenspeed.runtime.utils.network import get_local_ip_by_remote


class MooncakeEmbeddingManagerBase(DisaggManagerBase):
    """Embedding (encode->prefill) manager: the shared engine/socket/status FSM
    (:class:`tokenspeed.runtime.pd.base.manager.DisaggManagerBase`) plus the
    embedding buffer args.
    Carries none of the KV manager's KV/MLA/metrics fields.
    """

    def __init__(
        self,
        args: EmbeddingManagerArgs,
        embedding_args,  # EmbeddingArgs: embedding buffer ptrs + gpu/ib device
        disaggregation_mode: DisaggregationMode,
    ):
        self.args = args
        self.embedding_args = embedding_args
        self.disaggregation_mode = disaggregation_mode
        self.bootstrap_port = args.bootstrap_port
        self.world_size = args.tp_size
        self.dp_size = 1
        # embedding_args must be set above before super().__init__, which calls
        # register_buffer_to_engine.
        engine = MooncakeTransferEngine(
            hostname=get_local_ip_by_remote(),
            gpu_id=embedding_args.gpu_id,
            ib_device=embedding_args.ib_device,
        )
        super().__init__(engine=engine)

    def register_buffer_to_engine(self):
        ea = self.embedding_args
        if ea.embedding_data_ptr:
            self.engine.register(ea.embedding_data_ptr, ea.embedding_data_len)
        if ea.deepstack_data_ptr:
            self.engine.register(ea.deepstack_data_ptr, ea.deepstack_data_len)


class MooncakeEmbeddingBootstrapServer(DisaggBootstrapServerBase):
    """Embedding bootstrap rendezvous: the shared server with no extra fields --
    the encode->prefill handshake needs only the base ip/port + parallel-size
    sync, so there is nothing to layer onto :class:`DisaggBootstrapServerBase`.
    """