"""
Realtime bidirectional streaming generator.

Generates streaming chunks for WebSocket-based realtime API.
"""

#  SPDX-License-Identifier: Apache-2.0

import asyncio
from typing import Any, AsyncIterator

from fakeai.streaming.base import StreamChunk, StreamContext


class RealtimeStreamingGenerator:
    """
    Generator for realtime bidirectional streaming.

    Handles WebSocket-based streaming with audio and text.
    """

    def __init__(self, latency_manager=None):
        """
        Initialize realtime streaming generator.

        Args:
            latency_manager: LatencyProfileManager for timing simulation
        """
        self.latency_manager = latency_manager

    async def generate(
        self,
        context: StreamContext,
        full_response: Any,
    ) -> AsyncIterator[StreamChunk]:
        """
        Generate realtime streaming events.

        Args:
            context: Stream context with configuration
            full_response: Complete response object

        Yields:
            StreamChunk objects representing realtime events
        """
        # Placeholder implementation
        # Real implementation would handle:
        # - Session events
        # - Audio input/output
        # - Text responses
        # - Function calls
        # - Interruptions

        sequence = 0

        # Send session.created event
        yield StreamChunk(
            chunk_id=f"{context.stream_id}-{sequence}",
            sequence_number=sequence,
            data={
                "type": "session.created",
                "session": {
                    "id": context.stream_id,
                    "model": context.model,
                },
            },
            chunk_type="realtime.event",
            is_first=True,
            is_last=False,
        )
        sequence += 1

        await asyncio.sleep(context.chunk_delay_seconds)

        # Send response.created event
        yield StreamChunk(
            chunk_id=f"{context.stream_id}-{sequence}",
            sequence_number=sequence,
            data={
                "type": "response.created",
                "response": {
                    "id": f"resp-{sequence}",
                },
            },
            chunk_type="realtime.event",
            is_first=False,
            is_last=False,
        )
        sequence += 1

        await asyncio.sleep(context.chunk_delay_seconds)

        # Send response.done event
        yield StreamChunk(
            chunk_id=f"{context.stream_id}-{sequence}",
            sequence_number=sequence,
            data={
                "type": "response.done",
                "response": {
                    "id": f"resp-{sequence - 1}",
                    "status": "completed",
                },
            },
            chunk_type="realtime.event",
            is_first=False,
            is_last=True,
        )
