from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy import text
from sqlalchemy.orm import Session

from core_domain import ServiceHealth
from app.application.services import RuntimeApplicationService
from app.bootstrap.settings import RuntimeServiceSettings
from app.db.session import get_db
from app.domain.repositories import NodeRunRepository, WorkflowRunRepository
from app.infrastructure.workflow_client import WorkflowServiceClient, WorkflowServiceClientError
from app.schemas.run import (
    NodeRunResponse,
    NodeRunStatusUpdateRequest,
    RunBootstrapResponse,
    RunCreateRequest,
    WorkflowRunResponse,
    WorkflowRunStatusUpdateRequest,
)

router = APIRouter()


def get_runtime_settings() -> RuntimeServiceSettings:
    return RuntimeServiceSettings()


def get_runtime_application_service(
    db: Session = Depends(get_db),
    settings: RuntimeServiceSettings = Depends(get_runtime_settings),
) -> RuntimeApplicationService:
    return RuntimeApplicationService(
        workflow_run_repository=WorkflowRunRepository(db),
        node_run_repository=NodeRunRepository(db),
        workflow_client=WorkflowServiceClient(base_url=settings.workflow_service_url),
    )


@router.get("/health", response_model=ServiceHealth)
def health_check(db: Session = Depends(get_db)) -> ServiceHealth:
    db.execute(text("SELECT 1"))
    return ServiceHealth(service="runtime-service", status="ok", database="ok")


@router.post("/runs", response_model=RunBootstrapResponse)
def create_run(
    payload: RunCreateRequest,
    service: RuntimeApplicationService = Depends(get_runtime_application_service),
) -> RunBootstrapResponse:
    try:
        workflow_run, initial_node = service.create_run(payload)
    except WorkflowServiceClientError as exc:
        raise HTTPException(status_code=502, detail=str(exc)) from exc
    return RunBootstrapResponse(
        run=WorkflowRunResponse.from_entity(workflow_run),
        initial_node=NodeRunResponse.from_entity(initial_node) if initial_node else None,
    )


@router.get("/runs", response_model=list[WorkflowRunResponse])
def list_runs(
    tenant_id: str = Query(...),
    session_id: str | None = Query(default=None),
    service: RuntimeApplicationService = Depends(get_runtime_application_service),
) -> list[WorkflowRunResponse]:
    return [
        WorkflowRunResponse.from_entity(item)
        for item in service.list_runs(tenant_id=tenant_id, session_id=session_id)
    ]


@router.get("/node-runs", response_model=list[NodeRunResponse])
def list_node_runs(
    tenant_id: str = Query(...),
    run_id: str = Query(...),
    service: RuntimeApplicationService = Depends(get_runtime_application_service),
) -> list[NodeRunResponse]:
    return [
        NodeRunResponse.from_entity(item)
        for item in service.list_node_runs(tenant_id=tenant_id, run_id=run_id)
    ]


@router.post("/runs/{run_id}/status", response_model=WorkflowRunResponse)
def update_run_status(
    run_id: str,
    payload: WorkflowRunStatusUpdateRequest,
    service: RuntimeApplicationService = Depends(get_runtime_application_service),
) -> WorkflowRunResponse:
    entity = service.update_run_status(run_id=run_id, payload=payload)
    if entity is None:
        raise HTTPException(status_code=404, detail=f"workflow_run not found: {run_id}")
    return WorkflowRunResponse.from_entity(entity)


@router.post("/node-runs/{node_run_id}/status", response_model=NodeRunResponse)
def update_node_run_status(
    node_run_id: str,
    payload: NodeRunStatusUpdateRequest,
    service: RuntimeApplicationService = Depends(get_runtime_application_service),
) -> NodeRunResponse:
    entity = service.update_node_run_status(node_run_id=node_run_id, payload=payload)
    if entity is None:
        raise HTTPException(status_code=404, detail=f"node_run not found: {node_run_id}")
    return NodeRunResponse.from_entity(entity)