from airshelf.celery import app

from apps.ai.models import AITask
from apps.ai.services import poll_video_segment
from apps.projects.models import ExportJob
from apps.projects.models import VideoSegment
from apps.projects.services.export import run_export_job


@app.task(bind=True, max_retries=120)
def poll_video_segment_task(self, video_segment_id: str) -> str:
    segment = VideoSegment.objects.select_related("project", "project__created_by").get(id=video_segment_id)
    ai_task = (
        segment.project.ai_tasks.filter(
            task_type=AITask.Type.VIDEO_SEGMENT,
            request_payload__video_segment_id=str(segment.id),
            status__in=[AITask.Status.SUBMITTED, AITask.Status.POLLING],
        )
        .select_related("created_by")
        .order_by("-created_at")
        .first()
    )
    if ai_task is None:
        return video_segment_id

    user = ai_task.created_by or segment.project.created_by
    version = poll_video_segment(video_segment=segment, user=user)
    if version is None and segment.status in [VideoSegment.Status.RUNNING, VideoSegment.Status.QUEUED]:
        raise self.retry(countdown=30)
    return video_segment_id


@app.task(bind=True, max_retries=2)
def run_export_job_task(self, export_job_id: str) -> str:
    try:
        run_export_job(export_job_id)
    except Exception as exc:
        export_job = ExportJob.objects.filter(id=export_job_id).first()
        if export_job:
            export_job.status = ExportJob.Status.FAILED
            export_job.error_message = str(exc)
            export_job.save(update_fields=["status", "error_message", "updated_at"])
        raise
    return export_job_id


QUICK_CREATE_QUEUE = "airshelf.quick"


# 豆包长思考脚本允许完整跑 30 分钟；硬上限额外留 60 秒让 soft timeout 的
# 收尾/落库完成，避免 15 分钟时仍在正常输出却被 worker 强制中断。
@app.task(bind=True, max_retries=0, soft_time_limit=1800, time_limit=1860, queue=QUICK_CREATE_QUEUE)
def run_quick_script_task(self, quick_job_id: str) -> str:
    """脚本生成单独跑，避免把整条极速成片编排堵在一次 SSE 消费里。

    软超时必须长于豆包思考流（允许最长 30 分钟）。短于 HTTP 流超时会 SIGUSR1 掐连接，
    任务监视器就记成 stream aborted (client disconnected)。
    """
    from celery.exceptions import SoftTimeLimitExceeded

    from apps.projects.models import QuickCreateJob
    from apps.projects.services.quick_create import consume_quick_script, fail_quick_create

    try:
        consume_quick_script(quick_job_id)
    except SoftTimeLimitExceeded as exc:
        job = QuickCreateJob.objects.select_related("project").filter(id=quick_job_id).first()
        if job is not None and job.status not in {
            QuickCreateJob.Status.SUCCEEDED,
            QuickCreateJob.Status.FAILED,
            QuickCreateJob.Status.CANCELLED,
        }:
            fail_quick_create(
                job,
                "脚本生成时间较长，系统会自动重试",
                internal_error=f"SoftTimeLimitExceeded: stream aborted (client disconnected); {exc}",
            )
        return quick_job_id
    return quick_job_id


@app.task(bind=True, max_retries=0)
def advance_quick_create_task(self, quick_job_id: str) -> str:
    """一次只推进一个可重入状态，等待型阶段通过重新入队轮询，不占 worker 睡眠。

    编排走默认 celery 队列：worker 即使没听 airshelf.quick，也不会停在「等待开始」。
    """
    from apps.projects.models import QuickCreateJob
    from apps.projects.services.quick_create import _claim_next_advance, _enqueue_advance, advance_quick_create

    next_delay = advance_quick_create(quick_job_id)
    if next_delay is not None:
        if not _claim_next_advance(quick_job_id, int(next_delay)):
            return quick_job_id
        job = QuickCreateJob.objects.filter(id=quick_job_id).first()
        if job is not None:
            _enqueue_advance(job, countdown=max(1, int(next_delay)))
    return quick_job_id