from __future__ import annotations

import uuid

from fastapi import APIRouter, Depends, HTTPException, Response, status
from sqlalchemy.ext.asyncio import AsyncSession

from cpv3.infrastructure.auth import get_current_user
from cpv3.db.session import get_db
from cpv3.modules.jobs.schemas import (
    JobCreate,
    JobEventCreate,
    JobEventRead,
    JobEventUpdate,
    JobRead,
    JobUpdate,
)
from cpv3.modules.jobs.service import JobService
from cpv3.modules.tasks.service import TaskService
from cpv3.modules.users.models import User

jobs_router = APIRouter(prefix="/api/jobs", tags=["jobs"])
events_router = APIRouter(prefix="/api/jobs", tags=["events"])


@jobs_router.get("/jobs/", response_model=list[JobRead])
async def list_jobs_endpoint(
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> list[JobRead]:
    service = JobService(db)
    jobs = await service.list_jobs(requester=current_user)
    return [JobRead.model_validate(j) for j in jobs]


@jobs_router.post("/jobs/", response_model=JobRead, status_code=status.HTTP_201_CREATED)
async def create_job_endpoint(
    body: JobCreate,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> JobRead:
    service = JobService(db)
    job = await service.create_job(requester=current_user, data=body)
    return JobRead.model_validate(job)


@jobs_router.get("/jobs/{job_id}/", response_model=JobRead)
async def retrieve_job_endpoint(
    job_id: uuid.UUID,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> JobRead:
    service = JobService(db)
    job = await service.get_job(job_id)
    if job is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Не найдено")

    if not current_user.is_staff and job.user_id != current_user.id:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Доступ запрещён")

    return JobRead.model_validate(job)


@jobs_router.patch("/jobs/{job_id}/", response_model=JobRead)
async def patch_job_endpoint(
    job_id: uuid.UUID,
    body: JobUpdate,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> JobRead:
    service = JobService(db)
    job = await service.get_job(job_id)
    if job is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Не найдено")

    if not current_user.is_staff and job.user_id != current_user.id:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Доступ запрещён")

    if body.status == "CANCELLED":
        task_service = TaskService(db)
        job = await task_service.cancel_job(job)
        return JobRead.model_validate(job)

    job = await service.update_job(job, body)
    return JobRead.model_validate(job)


@jobs_router.delete("/jobs/{job_id}/", status_code=status.HTTP_204_NO_CONTENT)
async def delete_job_endpoint(
    job_id: uuid.UUID,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> Response:
    service = JobService(db)
    job = await service.get_job(job_id)
    if job is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Не найдено")

    if not current_user.is_staff and job.user_id != current_user.id:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Доступ запрещён")

    await service.deactivate_job(job)
    return Response(status_code=status.HTTP_204_NO_CONTENT)


@events_router.get("/events/", response_model=list[JobEventRead])
async def list_events_endpoint(
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> list[JobEventRead]:
    _ = current_user
    service = JobService(db)
    events = await service.list_job_events()
    return [JobEventRead.model_validate(e) for e in events]


@events_router.post("/events/", response_model=JobEventRead, status_code=status.HTTP_201_CREATED)
async def create_event_endpoint(
    body: JobEventCreate,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> JobEventRead:
    _ = current_user
    service = JobService(db)
    event = await service.create_job_event(body)
    return JobEventRead.model_validate(event)


@events_router.get("/events/{event_id}/", response_model=JobEventRead)
async def retrieve_event_endpoint(
    event_id: uuid.UUID,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> JobEventRead:
    _ = current_user
    service = JobService(db)
    event = await service.get_job_event(event_id)
    if event is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Не найдено")

    return JobEventRead.model_validate(event)


@events_router.patch("/events/{event_id}/", response_model=JobEventRead)
async def patch_event_endpoint(
    event_id: uuid.UUID,
    body: JobEventUpdate,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> JobEventRead:
    _ = current_user
    service = JobService(db)
    event = await service.get_job_event(event_id)
    if event is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Не найдено")

    event = await service.update_job_event(event, body)
    return JobEventRead.model_validate(event)


@events_router.delete("/events/{event_id}/", status_code=status.HTTP_204_NO_CONTENT)
async def delete_event_endpoint(
    event_id: uuid.UUID,
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
) -> Response:
    _ = current_user
    service = JobService(db)
    event = await service.get_job_event(event_id)
    if event is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Не найдено")

    await service.deactivate_job_event(event)
    return Response(status_code=status.HTTP_204_NO_CONTENT)