"""Tempo time-tracking integration service.

Authentication model
--------------------
Each user authenticates to Tempo with their own personal Tempo API token,
stored in ``user.tempo_api_token``.  This is different from the Jira API token.
Obtain a Tempo token at: Jira → Apps → Tempo → Settings → API Integration.

The global ``settings.TEMPO_ENABLED`` flag acts as a kill-switch.  When False,
all Tempo calls are silently skipped regardless of whether users have tokens.

What goes to Tempo
------------------
Only **red team execution** time is logged to Tempo.  This reflects the time
the operator (red_tech) spends executing the attack technique — from the moment
they click "Start" to when they click "Done".  Blue team evaluation time is
tracked internally in Aegis but is NOT sent to Tempo.
"""

import logging
from typing import Optional

from sqlalchemy.orm import Session

from app.config import settings
from app.domain.exceptions import InvalidOperationError
from app.models.jira_link import JiraLink, JiraLinkEntityType

logger = logging.getLogger(__name__)

# Only these activity types are forwarded to Tempo.
# "blue_team_evaluation" is intentionally excluded — it is tracked in Aegis
# but does not represent operator execution work.
_TEMPO_ACTIVITY_TYPES = {"red_team_execution"}


def has_tempo_configured(user) -> bool:
    """Return True if *user* has a personal Tempo API token stored."""
    return bool(getattr(user, "tempo_api_token", None))


def get_user_tempo_client(user):
    """Return a Tempo API v4 client authenticated as *user*.

    Raises ``InvalidOperationError`` when the user has no token or the
    client library is not installed.
    """
    token = getattr(user, "tempo_api_token", None)
    if not token:
        raise InvalidOperationError(
            "No Tempo API token configured. "
            "Add it in Settings → Profile → Tempo Integration."
        )
    try:
        from tempoapiclient import client_v4 as tempo_client
        return tempo_client.Tempo(auth_token=token)
    except ImportError:
        raise InvalidOperationError(
            "tempo-api-python-client is not installed. "
            "Run: pip install tempo-api-python-client"
        )


def log_worklog(
    user,
    jira_issue_id: int,
    author_account_id: str,
    date: str,
    time_spent_seconds: int,
    description: str,
    work_type: str | None = None,
) -> dict:
    """Create a worklog entry in Tempo using *user*'s personal token."""
    tempo = get_user_tempo_client(user)
    kwargs: dict = {
        "accountId": author_account_id,
        "issueId": jira_issue_id,
        "dateFrom": date,
        "timeSpentSeconds": time_spent_seconds,
        "description": description,
    }
    wt = work_type or settings.TEMPO_DEFAULT_WORK_TYPE
    if wt:
        kwargs["workType"] = wt
    return tempo.create_worklog(**kwargs)


def auto_log_test_worklog(
    db: Session,
    test,
    user,
    activity_type: str,
    duration_seconds: int,
) -> Optional[dict]:
    """Log *duration_seconds* to Tempo for the given test if conditions are met.

    ``duration_seconds`` must be the value already computed by the workflow
    layer (gross elapsed time minus any paused time).  It is used as-is so
    the Tempo entry always matches the Aegis worklog — no re-calculation.

    Only ``red_team_execution`` activities are forwarded to Tempo.
    ``blue_team_evaluation`` is tracked internally but not sent.

    Returns the Tempo worklog response dict, or ``None`` if skipped.
    Completely non-fatal — errors are logged and swallowed.
    """
    # Only operator execution time goes to Tempo
    if activity_type not in _TEMPO_ACTIVITY_TYPES:
        logger.debug(
            "Skipping Tempo sync for activity_type=%s (not in whitelist)", activity_type
        )
        return None

    # Global kill-switch
    if not settings.TEMPO_ENABLED:
        return None

    if duration_seconds <= 0:
        logger.debug(
            "Skipping Tempo sync for test %s: duration=%ds", test.id, duration_seconds
        )
        return None

    # Per-user token required
    if not has_tempo_configured(user):
        logger.debug(
            "User %s has no Tempo token; skipping worklog for test %s",
            getattr(user, "username", user), test.id,
        )
        return None

    # Need a Jira link with a numeric issue ID
    link = (
        db.query(JiraLink)
        .filter(
            JiraLink.entity_id == test.id,
            JiraLink.entity_type == JiraLinkEntityType.test,
        )
        .first()
    )

    if not link or not link.jira_issue_id:
        logger.debug("No Jira link for test %s, skipping Tempo worklog", test.id)
        return None

    jira_account_id = getattr(user, "jira_account_id", "") or ""
    if not jira_account_id:
        logger.debug(
            "User %s has no jira_account_id; skipping Tempo worklog",
            getattr(user, "username", user),
        )
        return None

    try:
        # Use red_started_at date as the worklog date so it matches when the
        # work actually happened (not the submission timestamp).
        work_date = (
            (test.red_started_at or getattr(test, "updated_at", None) or test.created_at)
            .strftime("%Y-%m-%d")
        )
        result = log_worklog(
            user=user,
            jira_issue_id=int(link.jira_issue_id),
            author_account_id=jira_account_id,
            date=work_date,
            time_spent_seconds=duration_seconds,
            description=f"[Aegis] Red Team execution: {test.name}",
        )
        logger.info(
            "Tempo worklog created for test %s by user %s: %ds on %s",
            test.id, getattr(user, "username", user), duration_seconds, work_date,
        )
        return result
    except Exception as e:
        logger.warning(
            "Tempo worklog failed for test %s (user %s): %s",
            test.id, getattr(user, "username", user), e, exc_info=True,
        )
        return None