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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

import asyncio
import time
from collections.abc import AsyncIterator
from typing import Any

from airflow.providers.dbt.cloud.hooks.dbt import DbtCloudHook, DbtCloudJobRunStatus
from airflow.triggers.base import BaseTrigger, TriggerEvent


class DbtCloudRunJobTrigger(BaseTrigger):
    """
    Trigger to make an HTTP call to dbt and get the status for the job.

    This is done with run id in polling interval of time.

    :param conn_id: The connection identifier for connecting to Dbt.
    :param run_id: The ID of a dbt Cloud job.
    :param end_time: Time in seconds to wait for a job run to reach a terminal status. Defaults to 7 days.
    :param execution_deadline: Optional absolute timestamp (in seconds since the epoch) after which
        the task is considered timed out.
    :param account_id: The ID of a dbt Cloud account.
    :param poll_interval:  polling period in seconds to check for the status.
    :param hook_params: Extra arguments passed to the DbtCloudHook constructor.
    """

    def __init__(
        self,
        conn_id: str,
        run_id: int,
        end_time: float,
        poll_interval: float,
        account_id: int | None,
        hook_params: dict[str, Any] | None = None,
        execution_deadline: float | None = None,
    ):
        super().__init__()
        self.run_id = run_id
        self.account_id = account_id
        self.conn_id = conn_id
        self.end_time = end_time
        self.execution_deadline = execution_deadline
        self.poll_interval = poll_interval
        self.hook_params = hook_params or {}

    def serialize(self) -> tuple[str, dict[str, Any]]:
        """Serialize DbtCloudRunJobTrigger arguments and classpath."""
        return (
            "airflow.providers.dbt.cloud.triggers.dbt.DbtCloudRunJobTrigger",
            {
                "run_id": self.run_id,
                "account_id": self.account_id,
                "conn_id": self.conn_id,
                "end_time": self.end_time,
                "execution_deadline": self.execution_deadline,
                "poll_interval": self.poll_interval,
                "hook_params": self.hook_params,
            },
        )

    async def run(self) -> AsyncIterator[TriggerEvent]:
        """Make async connection to Dbt, polls for the pipeline run status."""
        hook = DbtCloudHook(self.conn_id, **self.hook_params)
        try:
            while await self.is_still_running(hook):
                if self.execution_deadline is not None:
                    if self.execution_deadline < time.time():
                        yield TriggerEvent(
                            {
                                "status": "timeout",
                                "message": f"Job run {self.run_id} has timed out.",
                                "run_id": self.run_id,
                            }
                        )
                        return

                if self.end_time < time.time():
                    # Perform a final status check before declaring timeout, in case the
                    # job completed between the last poll and the timeout expiry.
                    if not await self.is_still_running(hook):
                        break
                    yield TriggerEvent(
                        {
                            "status": "error",
                            "message": f"Job run {self.run_id} has not reached a terminal status "
                            f"within the configured timeout.",
                            "run_id": self.run_id,
                        }
                    )
                    return
                await asyncio.sleep(self.poll_interval)
            job_run_status = await hook.get_job_status(self.run_id, self.account_id)
            if job_run_status == DbtCloudJobRunStatus.SUCCESS.value:
                yield TriggerEvent(
                    {
                        "status": "success",
                        "message": f"Job run {self.run_id} has completed successfully.",
                        "run_id": self.run_id,
                    }
                )
            elif job_run_status == DbtCloudJobRunStatus.CANCELLED.value:
                yield TriggerEvent(
                    {
                        "status": "cancelled",
                        "message": f"Job run {self.run_id} has been cancelled.",
                        "run_id": self.run_id,
                    }
                )
            else:
                yield TriggerEvent(
                    {
                        "status": "error",
                        "message": f"Job run {self.run_id} has failed.",
                        "run_id": self.run_id,
                    }
                )
        except Exception as e:
            yield TriggerEvent({"status": "error", "message": str(e), "run_id": self.run_id})

    async def is_still_running(self, hook: DbtCloudHook) -> bool:
        """Check whether the submitted job is running."""
        job_run_status = await hook.get_job_status(self.run_id, self.account_id)
        if not DbtCloudJobRunStatus.is_terminal(job_run_status):
            return True
        return False
