"""HTTP API for port traffic monitoring."""

from __future__ import annotations

from datetime import datetime

from fastapi import APIRouter, Depends, Query, Request
from sqlalchemy.orm import Session

from .auth_service import write_audit
from .db import get_db
from .port_traffic_schemas import (
    DiscoverPortsRequest,
    PortTrafficTaskCreate,
    PortTrafficTaskUpdate,
    PortTrafficTargetsPut,
)
from .port_traffic_service import (
    create_task,
    dashboard,
    delete_task,
    discover_ports,
    get_samples,
    get_task,
    list_targets,
    list_tasks,
    put_targets,
    set_task_status,
    update_task,
)

router = APIRouter(prefix="/v1/port-traffic", tags=["port-traffic"])


def _actor(request: Request) -> tuple[str, str]:
    user = getattr(request.state, "auth_user", None)
    if not user:
        return "", ""
    return str(getattr(user, "id", "") or ""), str(getattr(user, "username", "") or "")


@router.get("/dashboard")
def api_dashboard(db: Session = Depends(get_db)):
    return dashboard(db).model_dump()


@router.get("/tasks")
def api_list_tasks(
    page: int = Query(default=1, ge=1),
    page_size: int = Query(default=20, ge=1, le=100),
    db: Session = Depends(get_db),
):
    return list_tasks(db, page=page, page_size=page_size)


@router.post("/tasks")
def api_create_task(
    body: PortTrafficTaskCreate,
    request: Request,
    db: Session = Depends(get_db),
):
    out = create_task(db, body)
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.task.create",
        actor_user_id=uid,
        actor_username=uname,
        method="POST",
        path="/v1/port-traffic/tasks",
        status_code=200,
        detail={"id": out.id, "title": out.title, "start_now": body.start_now},
    )
    return out.model_dump()


@router.get("/tasks/{task_id}")
def api_get_task(task_id: str, db: Session = Depends(get_db)):
    return get_task(db, task_id).model_dump()


@router.patch("/tasks/{task_id}")
def api_patch_task(
    task_id: str,
    body: PortTrafficTaskUpdate,
    request: Request,
    db: Session = Depends(get_db),
):
    out = update_task(db, task_id, body)
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.task.update",
        actor_user_id=uid,
        actor_username=uname,
        method="PATCH",
        path=f"/v1/port-traffic/tasks/{task_id}",
        status_code=200,
        detail=body.model_dump(exclude_unset=True),
    )
    return out.model_dump()


@router.delete("/tasks/{task_id}")
def api_delete_task(task_id: str, request: Request, db: Session = Depends(get_db)):
    out = delete_task(db, task_id)
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.task.delete",
        actor_user_id=uid,
        actor_username=uname,
        method="DELETE",
        path=f"/v1/port-traffic/tasks/{task_id}",
        status_code=200,
        detail={"id": task_id},
    )
    return out


@router.post("/tasks/{task_id}/start")
def api_start_task(task_id: str, request: Request, db: Session = Depends(get_db)):
    out = set_task_status(db, task_id, "running")
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.task.start",
        actor_user_id=uid,
        actor_username=uname,
        method="POST",
        path=f"/v1/port-traffic/tasks/{task_id}/start",
        status_code=200,
        detail={"id": task_id},
    )
    return out.model_dump()


@router.post("/tasks/{task_id}/pause")
def api_pause_task(task_id: str, request: Request, db: Session = Depends(get_db)):
    out = set_task_status(db, task_id, "paused")
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.task.pause",
        actor_user_id=uid,
        actor_username=uname,
        method="POST",
        path=f"/v1/port-traffic/tasks/{task_id}/pause",
        status_code=200,
        detail={"id": task_id},
    )
    return out.model_dump()


@router.post("/tasks/{task_id}/stop")
def api_stop_task(task_id: str, request: Request, db: Session = Depends(get_db)):
    out = set_task_status(db, task_id, "stopped")
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.task.stop",
        actor_user_id=uid,
        actor_username=uname,
        method="POST",
        path=f"/v1/port-traffic/tasks/{task_id}/stop",
        status_code=200,
        detail={"id": task_id},
    )
    return out.model_dump()


@router.get("/tasks/{task_id}/targets")
def api_list_targets(task_id: str, db: Session = Depends(get_db)):
    return {"items": [t.model_dump() for t in list_targets(db, task_id)]}


@router.put("/tasks/{task_id}/targets")
def api_put_targets(
    task_id: str,
    body: PortTrafficTargetsPut,
    request: Request,
    db: Session = Depends(get_db),
):
    items = put_targets(db, task_id, body)
    uid, uname = _actor(request)
    write_audit(
        db,
        action="port_traffic.targets.put",
        actor_user_id=uid,
        actor_username=uname,
        method="PUT",
        path=f"/v1/port-traffic/tasks/{task_id}/targets",
        status_code=200,
        detail={"id": task_id, "count": len(items)},
    )
    return {"items": [t.model_dump() for t in items]}


@router.post("/discover/ports")
def api_discover_ports(body: DiscoverPortsRequest, db: Session = Depends(get_db)):
    return discover_ports(db, body).model_dump()


@router.get("/samples")
def api_samples(
    target_id: str = Query(..., description="port_traffic_target row id"),
    from_ts: datetime | None = Query(default=None, alias="from"),
    to_ts: datetime | None = Query(default=None, alias="to"),
    db: Session = Depends(get_db),
):
    return get_samples(db, target_row_id=target_id, from_ts=from_ts, to_ts=to_ts).model_dump()