"""
FastAPI routes for Incidents / Datenpannen-Management (DSGVO Art. 33/34).

Migrated from Go ai-compliance-sdk — Python backend is now Source of Truth.

Endpoints:
  POST   /incidents                              — create incident
  GET    /incidents                              — list (filter: status, severity, category)
  GET    /incidents/stats                        — statistics
  GET    /incidents/{id}                         — detail + measures + deadline_info
  PUT    /incidents/{id}                         — update
  DELETE /incidents/{id}                         — delete
  PUT    /incidents/{id}/status                  — quick status change (NEW)
  POST   /incidents/{id}/assess-risk             — risk assessment
  POST   /incidents/{id}/notify-authority        — Art. 33 authority notification
  POST   /incidents/{id}/notify-subjects         — Art. 34 data subject notification
  POST   /incidents/{id}/measures                — add measure
  PUT    /incidents/{id}/measures/{mid}          — update measure
  POST   /incidents/{id}/measures/{mid}/complete — complete measure
  POST   /incidents/{id}/timeline                — add timeline entry
  POST   /incidents/{id}/close                   — close incident
"""

import json
import logging
from datetime import datetime, timedelta, timezone
from typing import Optional, List
from uuid import UUID, uuid4

from fastapi import APIRouter, Depends, HTTPException, Query, Header
from pydantic import BaseModel
from sqlalchemy import text
from sqlalchemy.orm import Session

from classroom_engine.database import get_db

logger = logging.getLogger(__name__)
router = APIRouter(prefix="/incidents", tags=["incidents"])

DEFAULT_TENANT_ID = "9282a473-5c95-4b3a-bf78-0ecc0ec71d3e"


# =============================================================================
# Helpers
# =============================================================================

def _calculate_risk_level(likelihood: int, impact: int) -> str:
    """Calculate risk level from likelihood * impact score."""
    score = likelihood * impact
    if score >= 20:
        return "critical"
    elif score >= 12:
        return "high"
    elif score >= 6:
        return "medium"
    return "low"


def _is_notification_required(risk_level: str) -> bool:
    """DSGVO Art. 33 — notification required for critical/high risk."""
    return risk_level in ("critical", "high")


def _calculate_72h_deadline(detected_at: datetime) -> str:
    """Calculate 72-hour DSGVO Art. 33 deadline."""
    deadline = detected_at + timedelta(hours=72)
    return deadline.isoformat()


def _parse_jsonb(val):
    """Parse a JSONB field — already dict/list from psycopg or a JSON string."""
    if val is None:
        return None
    if isinstance(val, (dict, list)):
        return val
    if isinstance(val, str):
        try:
            return json.loads(val)
        except (json.JSONDecodeError, TypeError):
            return val
    return val


def _incident_to_response(row) -> dict:
    """Convert a DB row (RowMapping) to incident response dict."""
    r = dict(row)
    # Parse JSONB fields
    for field in (
        "risk_assessment", "authority_notification",
        "data_subject_notification", "timeline",
        "affected_data_categories", "affected_systems",
    ):
        if field in r:
            r[field] = _parse_jsonb(r[field])
    # Ensure ISO strings for datetime fields
    for field in ("detected_at", "created_at", "updated_at", "closed_at"):
        if field in r and r[field] is not None and hasattr(r[field], "isoformat"):
            r[field] = r[field].isoformat()
    return r


def _measure_to_response(row) -> dict:
    """Convert a DB measure row to response dict."""
    r = dict(row)
    for field in ("due_date", "completed_at", "created_at", "updated_at"):
        if field in r and r[field] is not None and hasattr(r[field], "isoformat"):
            r[field] = r[field].isoformat()
    return r


def _append_timeline(db: Session, incident_id: str, entry: dict):
    """Append a timeline entry to the incident's timeline JSONB array."""
    db.execute(text("""
        UPDATE incident_incidents
        SET timeline = COALESCE(timeline, '[]'::jsonb) || :entry::jsonb,
            updated_at = NOW()
        WHERE id = :id
    """), {"id": incident_id, "entry": json.dumps(entry)})


# =============================================================================
# Pydantic Schemas
# =============================================================================

class IncidentCreate(BaseModel):
    title: str
    description: Optional[str] = None
    category: Optional[str] = "data_breach"
    severity: Optional[str] = "medium"
    detected_at: Optional[str] = None
    affected_data_categories: Optional[List[str]] = None
    affected_data_subject_count: Optional[int] = 0
    affected_systems: Optional[List[str]] = None


class IncidentUpdate(BaseModel):
    title: Optional[str] = None
    description: Optional[str] = None
    category: Optional[str] = None
    status: Optional[str] = None
    severity: Optional[str] = None
    affected_data_categories: Optional[List[str]] = None
    affected_data_subject_count: Optional[int] = None
    affected_systems: Optional[List[str]] = None


class StatusUpdate(BaseModel):
    status: str


class RiskAssessmentRequest(BaseModel):
    likelihood: int
    impact: int
    notes: Optional[str] = None


class AuthorityNotificationRequest(BaseModel):
    authority_name: str
    reference_number: Optional[str] = None
    contact_person: Optional[str] = None
    notes: Optional[str] = None


class DataSubjectNotificationRequest(BaseModel):
    notification_text: str
    channel: str = "email"
    affected_count: Optional[int] = 0


class MeasureCreate(BaseModel):
    title: str
    description: Optional[str] = None
    measure_type: str = "corrective"
    responsible: Optional[str] = None
    due_date: Optional[str] = None


class MeasureUpdate(BaseModel):
    title: Optional[str] = None
    description: Optional[str] = None
    measure_type: Optional[str] = None
    status: Optional[str] = None
    responsible: Optional[str] = None
    due_date: Optional[str] = None


class TimelineEntryRequest(BaseModel):
    action: str
    details: Optional[str] = None


class CloseIncidentRequest(BaseModel):
    root_cause: str
    lessons_learned: Optional[str] = None


# =============================================================================
# CRUD Endpoints
# =============================================================================

@router.post("")
def create_incident(
    body: IncidentCreate,
    db: Session = Depends(get_db),
    x_tenant_id: Optional[str] = Header(None),
    x_user_id: Optional[str] = Header(None),
):
    tenant_id = x_tenant_id or DEFAULT_TENANT_ID
    user_id = x_user_id or "system"

    incident_id = str(uuid4())
    now = datetime.now(timezone.utc)

    detected_at = now
    if body.detected_at:
        try:
            parsed = datetime.fromisoformat(body.detected_at.replace("Z", "+00:00"))
            # Ensure timezone-aware
            detected_at = parsed if parsed.tzinfo else parsed.replace(tzinfo=timezone.utc)
        except (ValueError, AttributeError):
            detected_at = now

    deadline = detected_at + timedelta(hours=72)

    authority_notification = {
        "status": "pending",
        "deadline": deadline.isoformat(),
    }
    data_subject_notification = {
        "required": False,
        "status": "not_required",
    }
    timeline = [{
        "timestamp": now.isoformat(),
        "action": "incident_created",
        "user_id": user_id,
        "details": "Incident detected and reported",
    }]

    db.execute(text("""
        INSERT INTO incident_incidents (
            id, tenant_id, title, description, category, status, severity,
            detected_at, reported_by,
            affected_data_categories, affected_data_subject_count, affected_systems,
            authority_notification, data_subject_notification, timeline,
            created_at, updated_at
        ) VALUES (
            :id, :tenant_id, :title, :description, :category, 'detected', :severity,
            :detected_at, :reported_by,
            CAST(:affected_data_categories AS jsonb),
            :affected_data_subject_count,
            CAST(:affected_systems AS jsonb),
            CAST(:authority_notification AS jsonb),
            CAST(:data_subject_notification AS jsonb),
            CAST(:timeline AS jsonb),
            :now, :now
        )
    """), {
        "id": incident_id,
        "tenant_id": tenant_id,
        "title": body.title,
        "description": body.description or "",
        "category": body.category,
        "severity": body.severity,
        "detected_at": detected_at.isoformat(),
        "reported_by": user_id,
        "affected_data_categories": json.dumps(body.affected_data_categories or []),
        "affected_data_subject_count": body.affected_data_subject_count or 0,
        "affected_systems": json.dumps(body.affected_systems or []),
        "authority_notification": json.dumps(authority_notification),
        "data_subject_notification": json.dumps(data_subject_notification),
        "timeline": json.dumps(timeline),
        "now": now.isoformat(),
    })
    db.commit()

    # Fetch back for response
    result = db.execute(text(
        "SELECT * FROM incident_incidents WHERE id = :id"
    ), {"id": incident_id})
    row = result.mappings().first()
    incident_resp = _incident_to_response(row) if row else {}

    return {
        "incident": incident_resp,
        "authority_deadline": deadline.isoformat(),
        "hours_until_deadline": (deadline - now).total_seconds() / 3600,
    }


@router.get("")
def list_incidents(
    db: Session = Depends(get_db),
    x_tenant_id: Optional[str] = Header(None),
    status: Optional[str] = Query(None),
    severity: Optional[str] = Query(None),
    category: Optional[str] = Query(None),
    limit: int = Query(50),
    offset: int = Query(0),
):
    tenant_id = x_tenant_id or DEFAULT_TENANT_ID

    where_clauses = ["tenant_id = :tenant_id"]
    params: dict = {"tenant_id": tenant_id, "limit": limit, "offset": offset}

    if status:
        where_clauses.append("status = :status")
        params["status"] = status
    if severity:
        where_clauses.append("severity = :severity")
        params["severity"] = severity
    if category:
        where_clauses.append("category = :category")
        params["category"] = category

    where_sql = " AND ".join(where_clauses)

    count_result = db.execute(
        text(f"SELECT COUNT(*) FROM incident_incidents WHERE {where_sql}"),
        params,
    )
    total = count_result.scalar() or 0

    result = db.execute(text(f"""
        SELECT * FROM incident_incidents
        WHERE {where_sql}
        ORDER BY created_at DESC
        LIMIT :limit OFFSET :offset
    """), params)

    incidents = [_incident_to_response(r) for r in result.mappings().all()]
    return {"incidents": incidents, "total": total}


@router.get("/stats")
def get_stats(
    db: Session = Depends(get_db),
    x_tenant_id: Optional[str] = Header(None),
):
    tenant_id = x_tenant_id or DEFAULT_TENANT_ID

    result = db.execute(text("""
        SELECT
            COUNT(*) AS total,
            SUM(CASE WHEN status != 'closed' THEN 1 ELSE 0 END) AS open,
            SUM(CASE WHEN status = 'closed' THEN 1 ELSE 0 END) AS closed,
            SUM(CASE WHEN severity = 'critical' THEN 1 ELSE 0 END) AS critical,
            SUM(CASE WHEN severity = 'high' THEN 1 ELSE 0 END) AS high,
            SUM(CASE WHEN severity = 'medium' THEN 1 ELSE 0 END) AS medium,
            SUM(CASE WHEN severity = 'low' THEN 1 ELSE 0 END) AS low
        FROM incident_incidents
        WHERE tenant_id = :tenant_id
    """), {"tenant_id": tenant_id})
    row = result.mappings().first()

    return {
        "total": int(row["total"] or 0),
        "open": int(row["open"] or 0),
        "closed": int(row["closed"] or 0),
        "by_severity": {
            "critical": int(row["critical"] or 0),
            "high": int(row["high"] or 0),
            "medium": int(row["medium"] or 0),
            "low": int(row["low"] or 0),
        },
    }


@router.get("/{incident_id}")
def get_incident(
    incident_id: UUID,
    db: Session = Depends(get_db),
):
    result = db.execute(text(
        "SELECT * FROM incident_incidents WHERE id = :id"
    ), {"id": str(incident_id)})
    row = result.mappings().first()
    if not row:
        raise HTTPException(status_code=404, detail="incident not found")

    incident = _incident_to_response(row)

    # Get measures
    measures_result = db.execute(text(
        "SELECT * FROM incident_measures WHERE incident_id = :id ORDER BY created_at"
    ), {"id": str(incident_id)})
    measures = [_measure_to_response(m) for m in measures_result.mappings().all()]

    # Calculate deadline info
    deadline_info = None
    auth_notif = _parse_jsonb(row["authority_notification"]) if "authority_notification" in row.keys() else None
    if auth_notif and isinstance(auth_notif, dict) and "deadline" in auth_notif:
        try:
            deadline_dt = datetime.fromisoformat(auth_notif["deadline"].replace("Z", "+00:00"))
            now = datetime.now(timezone.utc)
            hours_remaining = (deadline_dt - now).total_seconds() / 3600
            deadline_info = {
                "deadline": auth_notif["deadline"],
                "hours_remaining": hours_remaining,
                "overdue": hours_remaining < 0,
            }
        except (ValueError, TypeError):
            pass

    return {
        "incident": incident,
        "measures": measures,
        "deadline_info": deadline_info,
    }


@router.put("/{incident_id}")
def update_incident(
    incident_id: UUID,
    body: IncidentUpdate,
    db: Session = Depends(get_db),
):
    iid = str(incident_id)

    # Check exists
    check = db.execute(text(
        "SELECT id FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    if not check.first():
        raise HTTPException(status_code=404, detail="incident not found")

    updates = []
    params: dict = {"id": iid}
    for field in ("title", "description", "category", "status", "severity"):
        val = getattr(body, field, None)
        if val is not None:
            updates.append(f"{field} = :{field}")
            params[field] = val
    if body.affected_data_categories is not None:
        updates.append("affected_data_categories = CAST(:adc AS jsonb)")
        params["adc"] = json.dumps(body.affected_data_categories)
    if body.affected_data_subject_count is not None:
        updates.append("affected_data_subject_count = :adsc")
        params["adsc"] = body.affected_data_subject_count
    if body.affected_systems is not None:
        updates.append("affected_systems = CAST(:asys AS jsonb)")
        params["asys"] = json.dumps(body.affected_systems)

    if not updates:
        raise HTTPException(status_code=400, detail="no fields to update")

    updates.append("updated_at = NOW()")
    sql = f"UPDATE incident_incidents SET {', '.join(updates)} WHERE id = :id"
    db.execute(text(sql), params)
    db.commit()

    result = db.execute(text(
        "SELECT * FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    row = result.mappings().first()
    return {"incident": _incident_to_response(row)}


@router.delete("/{incident_id}")
def delete_incident(
    incident_id: UUID,
    db: Session = Depends(get_db),
):
    iid = str(incident_id)
    check = db.execute(text(
        "SELECT id FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    if not check.first():
        raise HTTPException(status_code=404, detail="incident not found")

    db.execute(text("DELETE FROM incident_measures WHERE incident_id = :id"), {"id": iid})
    db.execute(text("DELETE FROM incident_incidents WHERE id = :id"), {"id": iid})
    db.commit()
    return {"message": "incident deleted"}


# =============================================================================
# Status Update (NEW — not in Go)
# =============================================================================

@router.put("/{incident_id}/status")
def update_status(
    incident_id: UUID,
    body: StatusUpdate,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    if not check.first():
        raise HTTPException(status_code=404, detail="incident not found")

    db.execute(text("""
        UPDATE incident_incidents
        SET status = :status, updated_at = NOW()
        WHERE id = :id
    """), {"id": iid, "status": body.status})

    _append_timeline(db, iid, {
        "timestamp": datetime.now(timezone.utc).isoformat(),
        "action": "status_changed",
        "user_id": user_id,
        "details": f"Status changed to {body.status}",
    })
    db.commit()

    result = db.execute(text(
        "SELECT * FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    row = result.mappings().first()
    return {"incident": _incident_to_response(row)}


# =============================================================================
# Risk Assessment
# =============================================================================

@router.post("/{incident_id}/assess-risk")
def assess_risk(
    incident_id: UUID,
    body: RiskAssessmentRequest,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id, status, authority_notification FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    row = check.mappings().first()
    if not row:
        raise HTTPException(status_code=404, detail="incident not found")

    risk_level = _calculate_risk_level(body.likelihood, body.impact)
    notification_required = _is_notification_required(risk_level)
    now = datetime.now(timezone.utc)

    assessment = {
        "likelihood": body.likelihood,
        "impact": body.impact,
        "risk_level": risk_level,
        "assessed_at": now.isoformat(),
        "assessed_by": user_id,
        "notes": body.notes or "",
    }

    new_status = "assessment"
    if notification_required:
        new_status = "notification_required"
        # Update authority notification status to pending
        auth = _parse_jsonb(row["authority_notification"]) or {}
        auth["status"] = "pending"
        db.execute(text("""
            UPDATE incident_incidents
            SET authority_notification = CAST(:an AS jsonb)
            WHERE id = :id
        """), {"id": iid, "an": json.dumps(auth)})

    db.execute(text("""
        UPDATE incident_incidents
        SET risk_assessment = CAST(:ra AS jsonb),
            status = :status,
            updated_at = NOW()
        WHERE id = :id
    """), {"id": iid, "ra": json.dumps(assessment), "status": new_status})

    _append_timeline(db, iid, {
        "timestamp": now.isoformat(),
        "action": "risk_assessed",
        "user_id": user_id,
        "details": f"Risk level: {risk_level} (likelihood={body.likelihood}, impact={body.impact})",
    })
    db.commit()

    return {
        "risk_assessment": assessment,
        "notification_required": notification_required,
        "incident_status": new_status,
    }


# =============================================================================
# Authority Notification (Art. 33)
# =============================================================================

@router.post("/{incident_id}/notify-authority")
def notify_authority(
    incident_id: UUID,
    body: AuthorityNotificationRequest,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id, detected_at, authority_notification FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    row = check.mappings().first()
    if not row:
        raise HTTPException(status_code=404, detail="incident not found")

    now = datetime.now(timezone.utc)

    # Preserve existing deadline
    auth_existing = _parse_jsonb(row["authority_notification"]) or {}
    deadline_str = auth_existing.get("deadline")
    if not deadline_str and row["detected_at"]:
        detected = row["detected_at"]
        if hasattr(detected, "isoformat"):
            deadline_str = (detected + timedelta(hours=72)).isoformat()
        else:
            deadline_str = _calculate_72h_deadline(
                datetime.fromisoformat(str(detected).replace("Z", "+00:00"))
            )

    notification = {
        "status": "sent",
        "deadline": deadline_str,
        "submitted_at": now.isoformat(),
        "authority_name": body.authority_name,
        "reference_number": body.reference_number or "",
        "contact_person": body.contact_person or "",
        "notes": body.notes or "",
    }

    db.execute(text("""
        UPDATE incident_incidents
        SET authority_notification = CAST(:an AS jsonb),
            status = 'notification_sent',
            updated_at = NOW()
        WHERE id = :id
    """), {"id": iid, "an": json.dumps(notification)})

    _append_timeline(db, iid, {
        "timestamp": now.isoformat(),
        "action": "authority_notified",
        "user_id": user_id,
        "details": f"Authority notification submitted to {body.authority_name}",
    })
    db.commit()

    # Check if submitted within 72h
    submitted_within_72h = True
    if deadline_str:
        try:
            deadline_dt = datetime.fromisoformat(deadline_str.replace("Z", "+00:00"))
            submitted_within_72h = now < deadline_dt
        except (ValueError, TypeError):
            pass

    return {
        "authority_notification": notification,
        "submitted_within_72h": submitted_within_72h,
    }


# =============================================================================
# Data Subject Notification (Art. 34)
# =============================================================================

@router.post("/{incident_id}/notify-subjects")
def notify_subjects(
    incident_id: UUID,
    body: DataSubjectNotificationRequest,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id, affected_data_subject_count FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    row = check.mappings().first()
    if not row:
        raise HTTPException(status_code=404, detail="incident not found")

    now = datetime.now(timezone.utc)
    affected_count = body.affected_count or row["affected_data_subject_count"] or 0

    notification = {
        "required": True,
        "status": "sent",
        "sent_at": now.isoformat(),
        "affected_count": affected_count,
        "notification_text": body.notification_text,
        "channel": body.channel,
    }

    db.execute(text("""
        UPDATE incident_incidents
        SET data_subject_notification = CAST(:dsn AS jsonb),
            updated_at = NOW()
        WHERE id = :id
    """), {"id": iid, "dsn": json.dumps(notification)})

    _append_timeline(db, iid, {
        "timestamp": now.isoformat(),
        "action": "data_subjects_notified",
        "user_id": user_id,
        "details": f"Data subjects notified via {body.channel} ({affected_count} affected)",
    })
    db.commit()

    return {"data_subject_notification": notification}


# =============================================================================
# Measures
# =============================================================================

@router.post("/{incident_id}/measures")
def add_measure(
    incident_id: UUID,
    body: MeasureCreate,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    if not check.first():
        raise HTTPException(status_code=404, detail="incident not found")

    measure_id = str(uuid4())
    now = datetime.now(timezone.utc)

    db.execute(text("""
        INSERT INTO incident_measures (
            id, incident_id, title, description, measure_type, status,
            responsible, due_date, created_at, updated_at
        ) VALUES (
            :id, :incident_id, :title, :description, :measure_type, 'planned',
            :responsible, :due_date, :now, :now
        )
    """), {
        "id": measure_id,
        "incident_id": iid,
        "title": body.title,
        "description": body.description or "",
        "measure_type": body.measure_type,
        "responsible": body.responsible or "",
        "due_date": body.due_date,
        "now": now.isoformat(),
    })

    _append_timeline(db, iid, {
        "timestamp": now.isoformat(),
        "action": "measure_added",
        "user_id": user_id,
        "details": f"Measure added: {body.title} ({body.measure_type})",
    })
    db.commit()

    result = db.execute(text(
        "SELECT * FROM incident_measures WHERE id = :id"
    ), {"id": measure_id})
    measure = _measure_to_response(result.mappings().first())
    return {"measure": measure}


@router.put("/{incident_id}/measures/{measure_id}")
def update_measure(
    incident_id: UUID,
    measure_id: UUID,
    body: MeasureUpdate,
    db: Session = Depends(get_db),
):
    mid = str(measure_id)

    check = db.execute(text(
        "SELECT id FROM incident_measures WHERE id = :id"
    ), {"id": mid})
    if not check.first():
        raise HTTPException(status_code=404, detail="measure not found")

    updates = []
    params: dict = {"id": mid}
    for field in ("title", "description", "measure_type", "status", "responsible", "due_date"):
        val = getattr(body, field, None)
        if val is not None:
            updates.append(f"{field} = :{field}")
            params[field] = val

    if not updates:
        raise HTTPException(status_code=400, detail="no fields to update")

    updates.append("updated_at = NOW()")
    sql = f"UPDATE incident_measures SET {', '.join(updates)} WHERE id = :id"
    db.execute(text(sql), params)
    db.commit()

    result = db.execute(text(
        "SELECT * FROM incident_measures WHERE id = :id"
    ), {"id": mid})
    measure = _measure_to_response(result.mappings().first())
    return {"measure": measure}


@router.post("/{incident_id}/measures/{measure_id}/complete")
def complete_measure(
    incident_id: UUID,
    measure_id: UUID,
    db: Session = Depends(get_db),
):
    mid = str(measure_id)

    check = db.execute(text(
        "SELECT id FROM incident_measures WHERE id = :id"
    ), {"id": mid})
    if not check.first():
        raise HTTPException(status_code=404, detail="measure not found")

    db.execute(text("""
        UPDATE incident_measures
        SET status = 'completed', completed_at = NOW(), updated_at = NOW()
        WHERE id = :id
    """), {"id": mid})
    db.commit()

    return {"message": "measure completed"}


# =============================================================================
# Timeline
# =============================================================================

@router.post("/{incident_id}/timeline")
def add_timeline_entry(
    incident_id: UUID,
    body: TimelineEntryRequest,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    if not check.first():
        raise HTTPException(status_code=404, detail="incident not found")

    now = datetime.now(timezone.utc)
    entry = {
        "timestamp": now.isoformat(),
        "action": body.action,
        "user_id": user_id,
        "details": body.details or "",
    }

    _append_timeline(db, iid, entry)
    db.commit()

    return {"timeline_entry": entry}


# =============================================================================
# Close Incident
# =============================================================================

@router.post("/{incident_id}/close")
def close_incident(
    incident_id: UUID,
    body: CloseIncidentRequest,
    db: Session = Depends(get_db),
    x_user_id: Optional[str] = Header(None),
):
    iid = str(incident_id)
    user_id = x_user_id or "system"

    check = db.execute(text(
        "SELECT id FROM incident_incidents WHERE id = :id"
    ), {"id": iid})
    if not check.first():
        raise HTTPException(status_code=404, detail="incident not found")

    now = datetime.now(timezone.utc)

    db.execute(text("""
        UPDATE incident_incidents
        SET status = 'closed',
            root_cause = :root_cause,
            lessons_learned = :lessons_learned,
            closed_at = :now,
            updated_at = :now
        WHERE id = :id
    """), {
        "id": iid,
        "root_cause": body.root_cause,
        "lessons_learned": body.lessons_learned or "",
        "now": now.isoformat(),
    })

    _append_timeline(db, iid, {
        "timestamp": now.isoformat(),
        "action": "incident_closed",
        "user_id": user_id,
        "details": f"Incident closed. Root cause: {body.root_cause}",
    })
    db.commit()

    return {
        "message": "incident closed",
        "root_cause": body.root_cause,
        "lessons_learned": body.lessons_learned or "",
    }