from .middleware import get_current_actor, get_current_request
from .models import AuditEvent
from .resolvers import user_profile_label


ACTION_EVIDENCE_MAP = {
    AuditEvent.Action.ADMIN_ADDITION: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.ADMIN_CHANGE: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.ADMIN_DELETION: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.USER_PI_UPGRADED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.PI_STATUS_REVOKED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.USER_ADMIN_PRIVILEGES_CHANGED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.ALLOCATION_REQUESTED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.ALLOCATION_CHANGE_REQUESTED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.ALLOCATION_STATUS_CHANGED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.ALLOCATION_DISABLED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.RENEWAL_REQUESTED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.RENEWAL_APPROVED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.ALLOCATION_RENEWED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.PROJECT_USER_ADDED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.PROJECT_USER_REMOVED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.PROJECT_USER_ROLE_CHANGED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.PROJECT_CREATED: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.PROJECT_ARCHIVED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.PROJECT_DELETED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.PROJECT_STATUS_CHANGED: (
        AuditEvent.EvidenceCategory.AC_AU,
        "AC,AU",
    ),
    AuditEvent.Action.PROJECT_PI_CHANGED: (
        AuditEvent.EvidenceCategory.AC_ACCESS_CONTROL,
        "AC",
    ),
    AuditEvent.Action.PROJECT_REVIEW_FORCED: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.PROJECT_REVIEW_SUBMITTED: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.PROJECT_REVIEW_COMPLETED: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.PROJECT_REVIEW_STATUS_CHANGED: (
        AuditEvent.EvidenceCategory.AU_AUDIT_ACCOUNTABILITY,
        "AU",
    ),
    AuditEvent.Action.RESOURCE_CREATED: (
        AuditEvent.EvidenceCategory.CM_CONFIGURATION_MANAGEMENT,
        "CM",
    ),
    AuditEvent.Action.RESOURCE_CHANGED: (
        AuditEvent.EvidenceCategory.CM_CONFIGURATION_MANAGEMENT,
        "CM",
    ),
    AuditEvent.Action.RESOURCE_DELETED: (
        AuditEvent.EvidenceCategory.CM_CONFIGURATION_MANAGEMENT,
        "CM",
    ),
}


def _get_request_ip(request):
    forwarded_for = request.META.get("HTTP_X_FORWARDED_FOR")
    if forwarded_for:
        return forwarded_for.split(",")[0].strip() or None
    return request.META.get("REMOTE_ADDR") or None


def _get_target_repr(target):
    if target._meta.label_lower == "user.userprofile":
        return user_profile_label(target)[:255]
    try:
        return str(target)[:255]
    except Exception:
        meta = target._meta
        pk = getattr(target, "pk", "")
        return f"{meta.app_label}.{meta.model_name} object ({pk})"[:255]


def log_event(
    action,
    target,
    old_values=None,
    new_values=None,
    message="",
    actor=None,
    request=None,
    evidence_category="",
    control_family="",
    source=AuditEvent.Source.RUNTIME,
    source_id="",
    is_reconstructed=False,
    event_time=None,
    target_repr="",
):
    if target is None or isinstance(target, AuditEvent):
        return None

    request = request if request is not None else get_current_request()
    actor = actor if actor is not None else get_current_actor()
    if actor is not None and getattr(actor, "is_authenticated", False) is False:
        actor = None

    if not evidence_category or not control_family:
        default_evidence_category, default_control_family = ACTION_EVIDENCE_MAP.get(action, ("", ""))
        evidence_category = evidence_category or default_evidence_category
        control_family = control_family or default_control_family

    meta = target._meta
    request_path = ""
    ip_address = None
    if request is not None:
        request_path = getattr(request, "path", "")[:255]
        ip_address = _get_request_ip(request)

    values = {
        "actor": actor,
        "action": action,
        "evidence_category": evidence_category,
        "control_family": control_family,
        "target_type": f"{meta.app_label}.{meta.model_name}",
        "target_id": str(getattr(target, "pk", "") or "")[:128],
        "target_repr": (target_repr or _get_target_repr(target))[:255],
        "old_values": old_values or {},
        "new_values": new_values or {},
        "message": str(message or ""),
        "source": source,
        "source_id": str(source_id or "")[:128],
        "is_reconstructed": is_reconstructed,
        "request_path": request_path,
        "ip_address": ip_address,
    }
    if event_time is not None:
        values["event_time"] = event_time

    return AuditEvent.objects.create(**values)