"""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
------------------
Both **red team execution** and **blue team evaluation** time are logged to
Tempo.  Red team time runs from when the red_tech clicks "Start" to "Done".
Blue team time runs from when the blue_tech clicks "Start Evaluation" (sets
blue_work_started_at) to when they submit, so it reflects actual working time
rather than queue time.
"""

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__)

# Activity types forwarded to Tempo.
_TEMPO_ACTIVITY_TYPES = {"red_team_execution", "blue_team_evaluation"}


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 whitelisted activity types go 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 the phase start timestamp as the worklog date so it matches when
        # work actually happened (not the submission timestamp).
        if activity_type == "blue_team_evaluation":
            work_date = (
                (test.blue_work_started_at or test.blue_started_at or test.created_at)
                .strftime("%Y-%m-%d")
            )
            description = f"[Aegis] Blue Team evaluation: {test.name}"
        else:
            work_date = (
                (test.red_started_at or getattr(test, "updated_at", None) or test.created_at)
                .strftime("%Y-%m-%d")
            )
            description = f"[Aegis] Red Team execution: {test.name}"
        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=description,
        )
        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