"""Agent-stream WebSocket endpoint.

A single ``/agent-stream/{workflow_uuid}`` socket where a caller can drive
an agent run by passing everything inline in the query string — including
provider credentials. The standard ``/telephony/ws/...`` path requires a
``TelephonyConfigurationModel`` row stored in the org; this one does not.

Auth: the workflow UUID itself acts as the identifier — no API key.
Routing: when ``?provider=<registered>`` matches a telephony provider, we
dispatch to that provider's ``handle_external_websocket``. The raw-audio
branch (no provider) is reserved for a future protocol decision and
currently rejects with 1011.
"""

import uuid
from typing import Optional

from fastapi import APIRouter, WebSocket
from loguru import logger
from pipecat.utils.run_context import set_current_org_id, set_current_run_id
from starlette.websockets import WebSocketDisconnect

from api.db import db_client
from api.enums import CallType, WorkflowRunState
from api.services.quota_service import check_dograh_quota_by_user_id
from api.services.telephony import registry as telephony_registry

router = APIRouter(prefix="/agent-stream")


@router.websocket("/{workflow_uuid}")
async def agent_stream_websocket(
    websocket: WebSocket,
    workflow_uuid: str,
):
    """Generic agent-stream WebSocket.

    Query params:
        provider: registered telephony provider name (e.g. ``cloudonix``)
        from / to / callId: call metadata persisted on the workflow run
        ...: provider-specific credentials/identifiers (e.g. ``session``,
             ``AccountSid``, ``CallSid`` for cloudonix)

    Without ``provider`` the raw-audio branch is currently not implemented.
    """
    await websocket.accept()
    params = dict(websocket.query_params)
    provider_name: Optional[str] = params.get("provider")

    if not provider_name:
        logger.warning(
            f"agent-stream raw audio branch not yet supported "
            f"(workflow_uuid={workflow_uuid})"
        )
        await websocket.close(code=1011, reason="Raw audio stream not yet implemented")
        return

    spec = telephony_registry.get_optional(provider_name)
    if spec is None:
        logger.warning(f"agent-stream unknown provider: {provider_name}")
        await websocket.close(code=1008, reason=f"Unknown provider: {provider_name}")
        return

    workflow = await db_client.get_workflow_by_uuid_unscoped(workflow_uuid)
    if not workflow:
        logger.warning(f"agent-stream workflow {workflow_uuid} not found")
        await websocket.close(code=1008, reason="Workflow not found")
        return

    quota_result = await check_dograh_quota_by_user_id(
        workflow.user_id, workflow_id=workflow.id
    )
    if not quota_result.has_quota:
        logger.warning(
            f"agent-stream quota exceeded for user {workflow.user_id}: "
            f"{quota_result.error_message}"
        )
        await websocket.close(
            code=1008, reason=quota_result.error_message or "Quota exceeded"
        )
        return

    numeric_suffix = int(str(uuid.uuid4()).replace("-", "")[:8], 16) % 100000000
    workflow_run_name = f"WR-AGS-{numeric_suffix:08d}"
    call_id = params.get("callId") or params.get("CallSid")
    initial_context = {
        **(workflow.template_context_variables or {}),
        "provider": provider_name,
        "caller_number": params.get("from"),
        "called_number": params.get("to"),
        "direction": "inbound",
    }
    workflow_run = await db_client.create_workflow_run(
        workflow_run_name,
        workflow.id,
        provider_name,
        user_id=workflow.user_id,
        call_type=CallType.INBOUND,
        initial_context=initial_context,
        gathered_context={"call_id": call_id} if call_id else {},
        logs={
            "inbound_webhook": {
                "domain": params.get("Domain"),
            },
        },
    )

    set_current_run_id(workflow_run.id)
    set_current_org_id(workflow.organization_id)

    await db_client.update_workflow_run(
        run_id=workflow_run.id, state=WorkflowRunState.RUNNING.value
    )

    provider_instance = spec.provider_cls({})
    try:
        await provider_instance.handle_external_websocket(
            websocket,
            organization_id=workflow.organization_id,
            workflow_id=workflow.id,
            user_id=workflow.user_id,
            workflow_run_id=workflow_run.id,
            params=params,
        )
    except NotImplementedError as e:
        logger.warning(f"agent-stream provider {provider_name} not supported: {e}")
        try:
            await websocket.close(code=1011, reason=str(e))
        except RuntimeError:
            pass
    except WebSocketDisconnect as e:
        logger.info(f"agent-stream disconnected: code={e.code} reason={e.reason}")
    except Exception as e:
        logger.error(f"agent-stream error for run {workflow_run.id}: {e}")
        try:
            await websocket.close(1011, "Internal server error")
        except RuntimeError:
            pass