import mimetypes

from django.urls import reverse


def dt(value):
    return value.isoformat() if value else None


def serialize_case(case, *, include_related=False):
    data = {
        "case_id": case.case_id,
        "title": case.title,
        "severity": case.severity,
        "confidence": case.confidence,
        "impact": case.impact,
        "priority": case.priority,
        "status": case.status,
        "verdict": case.verdict,
        "severity_ai": case.severity_ai,
        "confidence_ai": case.confidence_ai,
        "impact_ai": case.impact_ai,
        "priority_ai": case.priority_ai,
        "verdict_ai": case.verdict_ai,
        "summary": case.summary,
        "correlation_uid": case.correlation_uid,
        "tags": case.tags,
        "created_at": dt(case.created_at),
        "updated_at": dt(case.updated_at),
    }
    if include_related:
        data["alerts"] = [serialize_alert(alert, include_related=False) for alert in case.alerts.all()[:50]]
    return data


def serialize_alert(alert, *, include_related=False):
    data = {
        "alert_id": alert.alert_id,
        "case_id": alert.case.case_id if alert.case_id else "",
        "title": alert.title,
        "severity": alert.severity,
        "confidence": alert.confidence,
        "impact": alert.impact,
        "status": alert.status,
        "correlation_uid": alert.correlation_uid,
        "source_uid": alert.source_uid,
        "rule_id": alert.rule_id,
        "rule_name": alert.rule_name,
        "created_at": dt(alert.created_at),
        "updated_at": dt(alert.updated_at),
    }
    if include_related:
        data["artifacts"] = [serialize_artifact(artifact, include_related=False) for artifact in alert.artifacts.all()[:50]]
    return data


def serialize_artifact(artifact, *, include_related=False):
    data = {
        "artifact_id": artifact.artifact_id,
        "name": artifact.name,
        "type": artifact.type,
        "role": artifact.role,
        "value": artifact.value,
        "created_at": dt(artifact.created_at),
        "updated_at": dt(artifact.updated_at),
    }
    if include_related:
        data["alerts"] = [
            {
                "alert_id": alert.alert_id,
                "case_id": alert.case.case_id if alert.case_id else "",
                "title": alert.title,
                "severity": alert.severity,
                "status": alert.status,
            }
            for alert in artifact.alerts.select_related("case").all()[:50]
        ]
    return data


def serialize_knowledge(knowledge):
    return {
        "knowledge_id": knowledge.knowledge_id,
        "title": knowledge.title,
        "body": knowledge.body,
        "expires_at": dt(knowledge.expires_at),
        "source": knowledge.source,
        "tags": knowledge.tags,
        "case_id": knowledge.case.case_id if knowledge.case_id else "",
        "created_at": dt(knowledge.created_at),
        "updated_at": dt(knowledge.updated_at),
    }


def serialize_attachment(attachment, *, request=None):
    path = reverse("attachment-download", kwargs={"access_key": attachment.access_key})
    url = request.build_absolute_uri(path) if request is not None else path
    return {
        "file_key": str(attachment.access_key),
        "filename": attachment.filename,
        "size": attachment.size,
        "content_type": mimetypes.guess_type(attachment.filename)[0] or "application/octet-stream",
        "download_url": url,
        "uploaded_at": dt(attachment.uploaded_at),
    }


def serialize_comment(comment, *, request=None):
    return {
        "id": comment.id,
        "target": {
            "content_type": comment.content_type.model,
            "object_id": comment.object_id,
        },
        "body": comment.body,
        "author": comment.author.username if comment.author else "",
        "parent_id": comment.parent_id,
        "mentions": [user.username for user in comment.mentions.all()],
        "attachments": [serialize_attachment(item, request=request) for item in comment.attachments.all()],
        "created_at": dt(comment.created_at),
        "updated_at": dt(comment.updated_at),
    }


def serialize_enrichment(enrichment):
    target = ""
    if enrichment.case_id:
        target = enrichment.case.case_id
    elif enrichment.alert_id:
        target = enrichment.alert.alert_id
    elif enrichment.artifact_id:
        target = enrichment.artifact.artifact_id
    return {
        "enrichment_id": enrichment.enrichment_id,
        "target_id": target,
        "name": enrichment.name,
        "type": enrichment.type,
        "provider": enrichment.provider,
        "uid": enrichment.uid,
        "value": enrichment.value,
        "desc": enrichment.desc,
        "data": enrichment.data,
        "created_at": dt(enrichment.created_at),
        "updated_at": dt(enrichment.updated_at),
    }


def serialize_playbook(playbook, *, include_related=False):
    data = {
        "playbook_id": playbook.playbook_id,
        "case_id": playbook.case.case_id if playbook.case_id else "",
        "name": playbook.name,
        "user_input": playbook.user_input,
        "job_status": playbook.job_status,
        "job_id": playbook.job_id,
        "remark": playbook.remark,
        "created_at": dt(playbook.created_at),
        "updated_at": dt(playbook.updated_at),
    }
    if include_related and playbook.case_id:
        data["case"] = serialize_case(playbook.case, include_related=False)
    return data