"""Jira integration service.

Authentication model
--------------------
Each Aegis user authenticates to Jira with their own Atlassian email and
personal API token.  The email used is ``user.jira_email`` when set, falling
back to ``user.email`` (the Aegis account email).  This lets users specify a
separate corporate Atlassian email without changing their Aegis login.
The token is stored in ``user.jira_api_token``.

Admin configuration
-------------------
The Jira URL and default project key are stored in the ``system_configs``
table (keys ``jira.url`` and ``jira.project_key``) so the admin can update
them at runtime without redeploying.  These values override the legacy
``settings.JIRA_URL`` / ``settings.JIRA_DEFAULT_PROJECT`` env-vars which are
kept for backwards-compatibility only.

Lifecycle hooks
---------------
``push_test_event()`` is the single entry-point called from the test-workflow
service on every state transition.  It posts a rich comment to the linked
Jira issue (if one exists) using the acting user's credentials.

``auto_create_test_issue()`` is called once after a test is created; it
creates the Jira ticket and stores the link.
"""

from __future__ import annotations

# Import logging
import logging

# Import datetime from datetime
from datetime import datetime

# Import Any, Optional from typing
from typing import Optional

# Import UUID from uuid
from uuid import UUID

# Import Session from sqlalchemy.orm
from sqlalchemy.orm import Session

# Import settings from app.config
from app.config import settings

# Import EntityNotFoundError from app.domain.errors
from app.domain.errors import EntityNotFoundError

# Import InvalidOperationError from app.domain.exceptions
from app.domain.exceptions import InvalidOperationError

# Import Campaign from app.models.campaign
from app.models.campaign import Campaign

# Import JiraLink, JiraLinkEntityType, JiraSyncDirection from app.models.jira_link
from app.models.jira_link import JiraLink, JiraLinkEntityType, JiraSyncDirection

# Import Technique from app.models.technique
from app.models.technique import Technique

# Import Test from app.models.test
from app.models.test import Test
from app.models.user import User

# Assign logger = logging.getLogger(__name__)
logger = logging.getLogger(__name__)

# ---------------------------------------------------------------------------
# System-config helpers (admin-configurable Jira settings)
# ---------------------------------------------------------------------------

_JIRA_KEYS = {
    "url": "jira.url",
    "project_key": "jira.project_key",
    "enabled": "jira.enabled",
}


def _read_system_config(db: Session, key: str) -> Optional[str]:
    """Return a value from system_configs, or None if not set."""
    from app.models.system_config import SystemConfig  # avoid circular at import time

    row = db.query(SystemConfig).filter(SystemConfig.key == key).first()
    return row.value if row else None


def get_jira_url(db: Session) -> Optional[str]:
    """Return the admin-configured Jira URL, falling back to the env-var."""
    return _read_system_config(db, _JIRA_KEYS["url"]) or settings.JIRA_URL or None


def get_jira_project_key(db: Session) -> Optional[str]:
    """Return the admin-configured default project key, falling back to env-var."""
    return (
        _read_system_config(db, _JIRA_KEYS["project_key"])
        or settings.JIRA_DEFAULT_PROJECT
        or None
    )


def is_jira_enabled(db: Session) -> bool:
    """Return True if Jira integration is enabled (DB setting or env-var)."""
    db_val = _read_system_config(db, _JIRA_KEYS["enabled"])
    if db_val is not None:
        return db_val.lower() in ("true", "1", "yes")
    return settings.JIRA_ENABLED


def get_jira_parent_ticket(db: Session) -> Optional[str]:
    """Return the configured parent ticket key for campaigns, or None if not set."""
    return _read_system_config(db, "jira.parent_ticket") or None


def get_jira_parent_ticket_standalone(db: Session) -> Optional[str]:
    """Return the parent ticket for standalone tests (not in a campaign).

    Falls back to get_jira_parent_ticket() if not explicitly configured.
    """
    return (
        _read_system_config(db, "jira.parent_ticket_standalone")
        or get_jira_parent_ticket(db)
    )


def upsert_jira_config(db: Session, key: str, value: str) -> None:
    """Persist a Jira config key-value pair."""
    from app.models.system_config import SystemConfig

    row = db.query(SystemConfig).filter(SystemConfig.key == key).first()
    if row:
        row.value = value
    else:
        db.add(SystemConfig(key=key, value=value))


# ---------------------------------------------------------------------------
# Per-user Jira client
# ---------------------------------------------------------------------------


def _effective_jira_email(user: User) -> Optional[str]:
    """Return the email to use for Jira auth: jira_email if set, otherwise email."""
    return getattr(user, "jira_email", None) or user.email


def get_user_jira_client(user: User, db: Session):
    """Build an Atlassian Jira client authenticated as *user*.

    Uses ``user.jira_email`` when set, otherwise falls back to ``user.email``.
    Raises ``InvalidOperationError`` when configuration is incomplete so
    callers can surface meaningful error messages.
    """
    jira_url = get_jira_url(db)
    if not jira_url:
        raise InvalidOperationError(
            "Jira URL is not configured. Ask your administrator to set it in "
            "System Settings → Jira Configuration."
        )

    auth_email = _effective_jira_email(user)
    if not auth_email:
        raise InvalidOperationError(
            "No email configured for Jira authentication. "
            "Set a Jira email in Settings → Profile → Jira Integration."
        )

    if not user.jira_api_token:
        raise InvalidOperationError(
            "You have not configured a Jira API token. "
            "Go to Settings → Profile → Jira Integration and add your personal Atlassian token."
        )

    from atlassian import Jira

    # Strip trailing slash — the Atlassian library appends paths like
    # /rest/api/2/myself and a trailing slash causes double-slash URLs.
    clean_url = jira_url.rstrip("/")

    return Jira(
        url=clean_url,
        username=auth_email,
        password=user.jira_api_token,
        cloud=True,
    )


def has_jira_configured(user: User, db: Session) -> bool:
    """Return True if *user* has everything needed to call Jira."""
    return bool(get_jira_url(db) and _effective_jira_email(user) and user.jira_api_token)


# ---------------------------------------------------------------------------
# Ticket content builders (inspired by the pentest-to-Jira script)
# ---------------------------------------------------------------------------

_SEVERITY_TO_PRIORITY: dict[str, str] = {
    "critical": "Highest",
    "high": "High",
    "medium": "Medium",
    "low": "Low",
    "informational": "Lowest",
}

_STATE_EMOJI: dict[str, str] = {
    "draft":            "📝 Draft",
    "red_executing":    "🔴 Red Team Executing",
    "blue_evaluating":  "🔵 Blue Team Evaluating",
    "in_review":        "📋 In Review",
    "validated":        "✅ Validated",
    "rejected":         "❌ Rejected",
}


def _technique_severity(technique: Optional[Technique]) -> str:
    """Return a lowercase severity string from the technique, defaulting to medium."""
    if technique and hasattr(technique, "severity") and technique.severity:
        return technique.severity.lower()
    return "medium"


def _build_test_description(test: Test, technique: Optional[Technique]) -> str:
    """Build the initial Jira ticket description for a newly created test."""
    mitre_id = technique.mitre_id if technique else "N/A"
    tech_name = technique.name if technique else "N/A"
    tactic = technique.tactic if technique else "N/A"
    severity = _technique_severity(technique).capitalize()

    lines = [
        "h2. Aegis Security Test",
        "",
        f"*Test Name:* {test.name}",
        f"*MITRE Technique:* [{mitre_id}|https://attack.mitre.org/techniques/{mitre_id.replace('.', '/')}] — {tech_name}",
        f"*Tactic:* {tactic}",
        f"*Platform:* {test.platform or 'N/A'}",
        f"*Severity:* {severity}",
        f"*Data Classification:* {test.data_classification or 'N/A'}",
        "",
        "h3. Description",
        test.description or "_No description provided._",
        "",
        f"*Tool:* {test.tool_used or 'N/A'}",
        "",
        "----",
        f"_Created via Aegis at {datetime.utcnow().strftime('%Y-%m-%d %H:%M')} UTC_",
    ]
    return "\n".join(lines)


def _build_state_comment(
    test: Test,
    new_state: str,
    actor: User,
    extra: dict | None = None,
) -> str:
    """Build a Jira comment body for a test state transition."""
    label = _STATE_EMOJI.get(new_state, new_state)
    lines = [
        f"h3. {label}",
        "",
        f"*Changed by:* {actor.username} ({actor.email or 'no email'})",
        f"*At:* {datetime.utcnow().strftime('%Y-%m-%d %H:%M')} UTC",
        "",
    ]

    if new_state == "red_executing":
        lines += [
            "Red Team has started the attack execution.",
        ]

    elif new_state == "blue_evaluating":
        lines += [
            "Red Team has finished execution and submitted evidence for Blue Team evaluation.",
            "",
            f"*Attack Success:* {test.attack_success if test.attack_success is not None else 'N/A'}",
        ]
        if test.red_summary:
            lines += ["", "h4. Red Team Summary", test.red_summary]

    elif new_state == "in_review":
        lines += [
            "Blue Team has completed evaluation. Test is awaiting lead validation.",
            "",
            f"*Detection Result:* {test.detection_result or 'N/A'}",
        ]
        if test.blue_summary:
            lines += ["", "h4. Blue Team Summary", test.blue_summary]
        if test.remediation_steps:
            lines += ["", "h4. Remediation Steps", test.remediation_steps]

    elif new_state == "validated":
        lines += [
            "Test has been *validated* by both leads.",
            "",
            f"*Red Lead Status:* {test.red_validation_status or 'N/A'}",
            f"*Blue Lead Status:* {test.blue_validation_status or 'N/A'}",
        ]
        if test.red_validation_notes:
            lines += ["", f"*Red Lead Notes:* {test.red_validation_notes}"]
        if test.blue_validation_notes:
            lines += ["", f"*Blue Lead Notes:* {test.blue_validation_notes}"]

    elif new_state == "rejected":
        lines += [
            "Test has been *rejected* and must be reworked.",
            "",
            f"*Red Lead Status:* {test.red_validation_status or 'N/A'}",
            f"*Blue Lead Status:* {test.blue_validation_status or 'N/A'}",
        ]
        if test.red_validation_notes:
            lines += ["", f"*Red Lead Notes:* {test.red_validation_notes}"]
        if test.blue_validation_notes:
            lines += ["", f"*Blue Lead Notes:* {test.blue_validation_notes}"]

    elif new_state == "draft":
        lines += ["Test has been reopened for re-execution."]

    # Any caller-supplied extra data
    if extra:
        lines.append("")
        for k, v in extra.items():
            lines.append(f"*{k}:* {v}")

    lines.append("")
    lines.append("_Synced from [Aegis|https://aegis.undiamagico.es]_")
    return "\n".join(lines)


# ---------------------------------------------------------------------------
# Public lifecycle hooks
# ---------------------------------------------------------------------------


def _build_campaign_description(campaign) -> str:
    """Build the Jira ticket description for a campaign."""
    lines = [
        "h2. Aegis Security Campaign",
        "",
        f"*Campaign Name:* {campaign.name}",
        f"*Type:* {campaign.type}",
        f"*Status:* {campaign.status}",
    ]
    if campaign.description:
        lines += ["", "h3. Description", campaign.description]
    if campaign.tags:
        lines += ["", f"*Tags:* {', '.join(campaign.tags)}"]
    lines += [
        "",
        "----",
        f"_Created via Aegis at {datetime.utcnow().strftime('%Y-%m-%d %H:%M')} UTC_",
    ]
    return "\n".join(lines)


def get_campaign_jira_key(db: Session, campaign_id) -> Optional[str]:
    """Return the Jira issue key for a campaign, or None if not linked."""
    import uuid as _uuid
    try:
        cid = _uuid.UUID(str(campaign_id))
    except (ValueError, AttributeError):
        return None
    link = (
        db.query(JiraLink)
        .filter(
            JiraLink.entity_type == JiraLinkEntityType.campaign,
            JiraLink.entity_id == cid,
        )
        .first()
    )
    return link.jira_issue_key if link else None


def get_test_jira_key(db: Session, test_id) -> Optional[str]:
    """Return the Jira issue key for a test, or None if not linked."""
    import uuid as _uuid
    try:
        tid = _uuid.UUID(str(test_id))
    except (ValueError, AttributeError):
        return None
    link = (
        db.query(JiraLink)
        .filter(
            JiraLink.entity_type == JiraLinkEntityType.test,
            JiraLink.entity_id == tid,
        )
        .first()
    )
    return link.jira_issue_key if link else None


def auto_create_campaign_issue(
    db: Session,
    campaign,
    actor: User,
) -> Optional[str]:
    """Create a Jira issue for *campaign* under the configured parent ticket.

    Returns the Jira issue key on success, or ``None`` if Jira is not
    configured for *actor* or if the operation fails (non-fatal).

    Called once right after a campaign is committed to the database.
    The created ticket is stored as a JiraLink with entity_type=campaign.
    """
    if not has_jira_configured(actor, db):
        return None

    project_key = get_jira_project_key(db)
    if not project_key:
        logger.warning(
            "Jira project key not configured; skipping auto-create for campaign %s",
            campaign.id,
        )
        return None

    parent_ticket = get_jira_parent_ticket(db)

    try:
        jira = get_user_jira_client(actor, db)

        fields: dict = {
            "project": {"key": project_key},
            "summary": f"[Aegis Campaign] {campaign.name}",
            "description": _build_campaign_description(campaign),
            "issuetype": {"name": settings.JIRA_ISSUE_TYPE_CAMPAIGN},
            "labels": ["aegis", "campaign"],
            # customfield_10011 = Epic Name (required for Epic type in classic Jira)
            "customfield_10011": campaign.name,
        }

        # Set start date: use campaign.start_date if set, otherwise today
        effective_start = campaign.start_date or campaign.created_at
        if effective_start:
            fields[settings.JIRA_START_DATE_FIELD] = effective_start.strftime("%Y-%m-%d")

        # Nest under the configured parent ticket (Initiative, e.g. OFS-20795)
        if parent_ticket:
            fields["parent"] = {"key": parent_ticket}

        result = jira.issue_create(fields=fields)
        issue_key = result["key"]
        issue_id = result.get("id", "")

        link = JiraLink(
            entity_type=JiraLinkEntityType.campaign,
            entity_id=campaign.id,
            jira_issue_key=issue_key,
            jira_issue_id=issue_id,
            jira_project_key=project_key,
            sync_direction=JiraSyncDirection.aegis_to_jira,
            created_by=actor.id,
        )
        db.add(link)
        db.flush()

        logger.info("Auto-created Jira issue %s for campaign %s", issue_key, campaign.id)
        return issue_key

    except Exception as exc:
        # Non-fatal: Jira failures must never break the campaign creation flow
        logger.warning(
            "Failed to auto-create Jira issue for campaign %s: %s",
            campaign.id, exc, exc_info=True,
        )
        return None


def auto_create_test_issue(
    db: Session,
    test: Test,
    actor: User,
    *,
    technique: Optional[Technique] = None,
    parent_ticket_override: Optional[str] = None,
    campaign_start_date=None,  # datetime | None — inherited from campaign when available
) -> Optional[str]:
    """Create a Jira issue for *test* and store the link.

    Returns the Jira issue key on success, or ``None`` if Jira is not
    configured for *actor* or if the operation fails (non-fatal).

    Called once right after a test is committed to the database.

    Args:
        parent_ticket_override: When set, use this as the Jira parent ticket
            instead of the system-configured parent (e.g. OFS-9107).
            Use this to nest test tickets under a campaign ticket.
    """
    if not has_jira_configured(actor, db):
        return None

    project_key = get_jira_project_key(db)
    if not project_key:
        logger.warning("Jira project key not configured; skipping auto-create for test %s", test.id)
        return None

    # Resolve technique if not supplied
    if technique is None:
        technique = db.query(Technique).filter(Technique.id == test.technique_id).first()

    mitre_id = technique.mitre_id if technique else "N/A"

    try:
        jira = get_user_jira_client(actor, db)

        # All tests — whether inside a campaign or standalone — are created
        # as Task.  Campaign tests use the campaign Jira key as parent
        # (passed via parent_ticket_override); standalone tests use the
        # configured standalone parent ticket (e.g. OFS-20798, which is an
        # Epic so it can parent Tasks).
        parent = parent_ticket_override or get_jira_parent_ticket_standalone(db)
        issue_type = settings.JIRA_ISSUE_TYPE_TEST  # always Task

        poc = test.procedure_text or "N/A"
        fields: dict = {
            "project": {"key": project_key},
            "summary": f"[Aegis] {mitre_id} — {test.name}",
            "description": _build_test_description(test, technique),
            "issuetype": {"name": issue_type},
            "labels": ["aegis", "security-test", mitre_id.replace(".", "-")],
            # customfield_10309 = Proof of Concept field (required by team's Jira config)
            "customfield_10309": f"{{code}}{poc}{{code}}",
        }

        # Inherit campaign start date if available, otherwise use today
        from datetime import date as _date
        effective_start = campaign_start_date or _date.today()
        if hasattr(effective_start, "strftime"):
            fields[settings.JIRA_START_DATE_FIELD] = effective_start.strftime("%Y-%m-%d")

        if parent:
            fields["parent"] = {"key": parent}

        result = jira.issue_create(fields=fields)
        issue_key = result["key"]
        issue_id = result.get("id", "")

        link = JiraLink(
            entity_type=JiraLinkEntityType.test,
            entity_id=test.id,
            jira_issue_key=issue_key,
            jira_issue_id=issue_id,
            jira_project_key=project_key,
            sync_direction=JiraSyncDirection.aegis_to_jira,
            created_by=actor.id,
        )
        db.add(link)
        db.flush()

        logger.info("Auto-created Jira issue %s for test %s", issue_key, test.id)
        return issue_key

    except Exception as exc:
        # Non-fatal: Jira failures must never break the test creation flow
        logger.warning(
            "Failed to auto-create Jira issue for test %s: %s",
            test.id, exc, exc_info=True,
        )
        return None


def push_test_event(
    db: Session,
    test: Test,
    actor: User,
    new_state: str,
    *,
    extra: dict | None = None,
) -> None:
    """Post a lifecycle comment to the Jira issue linked to *test*.

    Called from ``test_workflow_service`` after every state transition.
    Completely non-fatal — any Jira error is logged and swallowed so it
    never blocks the test workflow.
    """
    if not has_jira_configured(actor, db):
        return

    link = (
        db.query(JiraLink)
        .filter(
            JiraLink.entity_type == JiraLinkEntityType.test,
            JiraLink.entity_id == test.id,
        )
        .first()
    )
    if not link:
        return

    try:
        jira = get_user_jira_client(actor, db)
        comment = _build_state_comment(test, new_state, actor, extra)
        jira.issue_add_comment(link.jira_issue_key, comment)

        # When the operator starts execution: transition to "In Progress"
        # and assign the ticket to that operator.
        if new_state == "red_executing":
            try:
                jira.set_issue_status(link.jira_issue_key, "In Progress")
                logger.info(
                    "Transitioned Jira ticket %s to In Progress", link.jira_issue_key
                )
            except Exception as exc_t:
                logger.warning(
                    "Could not transition %s to In Progress: %s",
                    link.jira_issue_key, exc_t,
                )
            jira_account_id = getattr(actor, "jira_account_id", None)
            if jira_account_id:
                try:
                    jira.assign_issue(link.jira_issue_key, account_id=jira_account_id)
                    logger.info(
                        "Assigned Jira ticket %s to account %s",
                        link.jira_issue_key, jira_account_id,
                    )
                except Exception as exc_a:
                    logger.warning(
                        "Could not assign %s to %s: %s",
                        link.jira_issue_key, jira_account_id, exc_a,
                    )

        link.last_synced_at = datetime.utcnow()
        db.flush()
        logger.info(
            "Posted Jira comment to %s for test %s state=%s",
            link.jira_issue_key, test.id, new_state,
        )
    except Exception as exc:
        logger.warning(
            "Failed to push Jira event for test %s (state=%s): %s",
            test.id, new_state, exc, exc_info=True,
        )


# ---------------------------------------------------------------------------
# Legacy / generic helpers (kept for existing routes)
# ---------------------------------------------------------------------------


def get_jira_client():
    """Return a shared Jira client using global credentials (legacy path).

    Raises ``InvalidOperationError`` when Jira is disabled or unconfigured.
    Prefer ``get_user_jira_client()`` for new code.
    """
    if not settings.JIRA_ENABLED:
        # Raise InvalidOperationError
        raise InvalidOperationError("Jira integration is not enabled")
    if not settings.JIRA_URL or not settings.JIRA_USERNAME or not settings.JIRA_API_TOKEN:
        raise InvalidOperationError(
            "Jira is enabled but JIRA_URL / JIRA_USERNAME / JIRA_API_TOKEN are not set"
        )
    from atlassian import Jira

    return Jira(
        url=settings.JIRA_URL,
        username=settings.JIRA_USERNAME,
        password=settings.JIRA_API_TOKEN,
        cloud=settings.JIRA_IS_CLOUD,
    )


# Define function search_jira_issues
def search_jira_issues(query: str, max_results: int = 10) -> list[dict]:
    """Search Jira issues by JQL or free text (uses global credentials)."""
    jira = get_jira_client()
    # Assign jql = query if "=" in query or "~" in query else f'summary ~ "{query}"'
    jql = query if "=" in query or "~" in query else f'summary ~ "{query}"'
    # Assign results = jira.jql(jql, limit=max_results)
    results = jira.jql(jql, limit=max_results)
    # Return [
    return [
        {
            # Literal argument value
            "issue_key": issue["key"],
            # Literal argument value
            "summary": issue["fields"]["summary"],
            # Literal argument value
            "status": issue["fields"]["status"]["name"],
            # Literal argument value
            "assignee": (issue["fields"].get("assignee") or {}).get("displayName"),
            # Literal argument value
            "priority": (issue["fields"].get("priority") or {}).get("name"),
        }
        for issue in results.get("issues", [])
    ]


# Define function create_jira_issue
def create_jira_issue(
    # Entry: project_key
    project_key: str,
    # Entry: summary
    summary: str,
    # Entry: description
    description: str,
    # Entry: issue_type
    issue_type: str = "Task",
    # Entry: labels
    labels: Optional[list[str]] = None,
    # Entry: custom_fields
    custom_fields: Optional[dict] = None,
) -> dict:
    """Create a Jira issue and return its key + id (uses global credentials)."""
    jira = get_jira_client()
    # Assign fields = {
    fields: dict = {
        # Literal argument value
        "project": {"key": project_key},
        # Literal argument value
        "summary": summary,
        # Literal argument value
        "description": description,
        # Literal argument value
        "issuetype": {"name": issue_type},
    }
    # Check: labels
    if labels:
        # Assign fields["labels"] = labels
        fields["labels"] = labels
    # Check: custom_fields
    if custom_fields:
        # Call fields.update()
        fields.update(custom_fields)

    # Assign result = jira.issue_create(fields=fields)
    result = jira.issue_create(fields=fields)
    # Return {"issue_key": result["key"], "issue_id": result["id"]}
    return {"issue_key": result["key"], "issue_id": result["id"]}


# Define function sync_jira_to_aegis
def sync_jira_to_aegis(db: Session, link: JiraLink) -> None:
    """Pull current status from Jira into the local link record (global creds)."""
    jira = get_jira_client()
    # Assign issue = jira.issue(link.jira_issue_key)
    issue = jira.issue(link.jira_issue_key)
    # Assign fields = issue.get("fields", {})
    fields = issue.get("fields", {})
    # Assign link.jira_status = fields.get("status", {}).get("name")
    link.jira_status = fields.get("status", {}).get("name")
    # Assign link.jira_priority = (fields.get("priority") or {}).get("name")
    link.jira_priority = (fields.get("priority") or {}).get("name")
    # Assign link.jira_assignee = (fields.get("assignee") or {}).get("displayName")
    link.jira_assignee = (fields.get("assignee") or {}).get("displayName")
    # Assign link.jira_story_points = str(fields.get("customfield_10016", ""))
    link.jira_story_points = str(fields.get("customfield_10016", ""))
    # Assign link.last_synced_at = datetime.utcnow()
    link.last_synced_at = datetime.utcnow()
    # Flush changes to DB without committing the transaction
    db.flush()


# Define function sync_aegis_to_jira
def sync_aegis_to_jira(db: Session, link: JiraLink, entity_data: dict) -> None:
    """Push an Aegis status update as a Jira comment (global creds)."""
    jira = get_jira_client()
    # Assign comment_body = _build_sync_comment(entity_data)
    comment_body = _build_sync_comment(entity_data)
    # Call jira.issue_add_comment()
    jira.issue_add_comment(link.jira_issue_key, comment_body)
    # Assign link.last_synced_at = datetime.utcnow()
    link.last_synced_at = datetime.utcnow()
    # Flush changes to DB without committing the transaction
    db.flush()


# Define function _build_sync_comment
def _build_sync_comment(data: dict) -> str:
    lines = ["h3. Aegis Sync Update", ""]
    # Iterate over data.items()
    for key, value in data.items():
        # Call lines.append()
        lines.append(f"*{key}:* {value}")
    # Call lines.append()
    lines.append(f"\n_Synced at {datetime.utcnow().isoformat()}_")
    # Return "\n".join(lines)
    return "\n".join(lines)


# ── Link CRUD ────────────────────────────────────────────────────────────


def create_link(
    # Entry: db
    db: Session,
    *,
    # Entry: entity_type
    entity_type: JiraLinkEntityType,
    # Entry: entity_id
    entity_id: UUID,
    # Entry: jira_issue_key
    jira_issue_key: str,
    # Entry: sync_direction
    sync_direction: JiraSyncDirection,
    # Entry: created_by
    created_by: UUID,
) -> JiraLink:
    link = JiraLink(
        # Keyword argument: entity_type
        entity_type=entity_type,
        # Keyword argument: entity_id
        entity_id=entity_id,
        # Keyword argument: jira_issue_key
        jira_issue_key=jira_issue_key,
        # Keyword argument: sync_direction
        sync_direction=sync_direction,
        # Keyword argument: created_by
        created_by=created_by,
    )
    # Stage new record(s) for database insertion
    db.add(link)
    # Flush changes to DB without committing the transaction
    db.flush()

    # Check: settings.JIRA_ENABLED
    if settings.JIRA_ENABLED:
        # Attempt the following; catch errors below
        try:
            # Call sync_jira_to_aegis()
            sync_jira_to_aegis(db, link)
        # Handle Exception
        except Exception as e:
            # Log warning: "Initial Jira sync failed for %s: %s", jira_issue_
            logger.warning("Initial Jira sync failed for %s: %s", jira_issue_key, e)

    # Return link
    return link


# Define function list_links
def list_links(
    # Entry: db
    db: Session,
    *,
    # Entry: entity_type
    entity_type: Optional[JiraLinkEntityType] = None,
    # Entry: entity_id
    entity_id: Optional[UUID] = None,
    entity_ids: Optional[list[UUID]] = None,
) -> list[JiraLink]:
    query = db.query(JiraLink)
    # Check: entity_type
    if entity_type:
        # Assign query = query.filter(JiraLink.entity_type == entity_type)
        query = query.filter(JiraLink.entity_type == entity_type)
    # Check: entity_id
    if entity_id:
        # Assign query = query.filter(JiraLink.entity_id == entity_id)
        query = query.filter(JiraLink.entity_id == entity_id)
    elif entity_ids:
        query = query.filter(JiraLink.entity_id.in_(entity_ids))
    return query.order_by(JiraLink.created_at.desc()).all()


# Define function get_link_or_raise
def get_link_or_raise(db: Session, link_id: UUID) -> JiraLink:
    link = db.query(JiraLink).filter(JiraLink.id == link_id).first()
    # Check: not link
    if not link:
        # Raise EntityNotFoundError
        raise EntityNotFoundError("JiraLink", str(link_id))
    # Return link
    return link


# Define function delete_link
def delete_link(db: Session, link_id: UUID) -> JiraLink:
    link = get_link_or_raise(db, link_id)
    # Mark record for deletion on next commit
    db.delete(link)
    # Return link
    return link


def build_issue_data(
    db: Session, entity_type: JiraLinkEntityType, entity_id: UUID
) -> tuple[str, str]:
    """Build Jira issue summary and description from an Aegis entity."""
    # Check: entity_type == JiraLinkEntityType.test
    if entity_type == JiraLinkEntityType.test:
        # Assign entity = db.query(Test).filter(Test.id == entity_id).first()
        entity = db.query(Test).filter(Test.id == entity_id).first()
        # Check: not entity
        if not entity:
            # Raise EntityNotFoundError
            raise EntityNotFoundError("Test", str(entity_id))
        technique = db.query(Technique).filter(Technique.id == entity.technique_id).first()
        return (
            f"[Aegis] {technique.mitre_id if technique else 'N/A'} — {entity.name}",
            _build_test_description(entity, technique),
        )
    # Alternative: entity_type == JiraLinkEntityType.campaign
    elif entity_type == JiraLinkEntityType.campaign:
        # Assign entity = db.query(Campaign).filter(Campaign.id == entity_id).first()
        entity = db.query(Campaign).filter(Campaign.id == entity_id).first()
        # Check: not entity
        if not entity:
            # Raise EntityNotFoundError
            raise EntityNotFoundError("Campaign", str(entity_id))
        # Return (
        return (
            f"[Aegis Campaign] {entity.name}",
            f"Campaign: {entity.name}\nType: {entity.type}\nStatus: {entity.status}\n"
            f"Description: {entity.description or 'N/A'}",
        )
    # Alternative: entity_type == JiraLinkEntityType.technique
    elif entity_type == JiraLinkEntityType.technique:
        # Assign entity = db.query(Technique).filter(Technique.id == entity_id).first()
        entity = db.query(Technique).filter(Technique.id == entity_id).first()
        # Check: not entity
        if not entity:
            # Raise EntityNotFoundError
            raise EntityNotFoundError("Technique", str(entity_id))
        # Return (
        return (
            f"[Aegis Technique] {entity.mitre_id} - {entity.name}",
            f"MITRE ID: {entity.mitre_id}\nName: {entity.name}\n"
            f"Tactic: {entity.tactic or 'N/A'}\n"
            f"Description: {entity.description or 'N/A'}",
        )
    # Fallback: handle remaining cases
    else:
        # Return f"[Aegis] Entity {entity_id}", f"Entity type: {entity_type.value}"
        return f"[Aegis] Entity {entity_id}", f"Entity type: {entity_type.value}"


# Define function create_issue_and_link
def create_issue_and_link(
    # Entry: db
    db: Session,
    *,
    # Entry: entity_type
    entity_type: JiraLinkEntityType,
    # Entry: entity_id
    entity_id: UUID,
    # Entry: created_by
    created_by: UUID,
) -> dict:
    """Create a Jira issue from an Aegis entity and link them (global creds)."""
    summary, description = build_issue_data(db, entity_type, entity_id)
    project_key = settings.JIRA_DEFAULT_PROJECT
    result = create_jira_issue(
        project_key=project_key,
        summary=summary,
        # Keyword argument: description
        description=description,
        # Keyword argument: labels
        labels=["aegis", entity_type.value],
    )
    # Assign link = JiraLink(
    link = JiraLink(
        # Keyword argument: entity_type
        entity_type=entity_type,
        # Keyword argument: entity_id
        entity_id=entity_id,
        # Keyword argument: jira_issue_key
        jira_issue_key=result["issue_key"],
        # Keyword argument: jira_issue_id
        jira_issue_id=result["issue_id"],
        jira_project_key=project_key,
        created_by=created_by,
    )
    # Stage new record(s) for database insertion
    db.add(link)
    # Return {"issue_key": result["issue_key"], "link_id": str(link.id)}
    return {"issue_key": result["issue_key"], "link_id": str(link.id)}