"""JSON serializers for API responses."""
from __future__ import annotations

from typing import Any

from backend.app.models import Engagement, User
from backend.app.models.simulation import Simulation
from backend.app.models.simulation_template import SimulationTemplate


def serialize_user(user: User) -> dict[str, Any]:
    return {
        "id": user.id,
        "username": user.username,
        "role": user.role.value,
        "created_at": user.created_at.isoformat() if user.created_at else None,
    }


def serialize_user_brief(user: User) -> dict[str, Any]:
    return {"id": user.id, "username": user.username}


def _enrich_techniques(raw: list[dict[str, Any]]) -> list[dict[str, Any]]:
    """Attach tactics to each {id, name} snapshot from the MITRE service."""
    from backend.app.services import mitre as mitre_svc

    return [
        {"id": t["id"], "name": t["name"], "tactics": mitre_svc.get_tactics(t["id"])}
        for t in (raw or [])
    ]


def _enrich_tactics(tactic_ids: list[str]) -> list[dict[str, str]]:
    """Resolve TA-ids to {id, name} at runtime."""
    from backend.app.services import mitre as mitre_svc

    result = []
    for tid in tactic_ids or []:
        entry = mitre_svc.lookup_tactic(tid)
        if entry is not None:
            result.append(entry)
        else:
            result.append({"id": tid, "name": ""})
    return result


def serialize_simulation(simulation: Simulation) -> dict[str, Any]:
    return {
        "id": simulation.id,
        "engagement_id": simulation.engagement_id,
        "name": simulation.name,
        "techniques": _enrich_techniques(simulation.techniques or []),
        "tactics": _enrich_tactics(simulation.tactic_ids or []),
        "description": simulation.description,
        "commands": simulation.commands,
        "prerequisites": simulation.prerequisites,
        "executed_at": simulation.executed_at.isoformat() if simulation.executed_at else None,
        "execution_result": simulation.execution_result,
        "log_source": simulation.log_source,
        "logs": simulation.logs,
        "soc_comment": simulation.soc_comment,
        "incident_number": simulation.incident_number,
        "status": simulation.status.value,
        "created_at": simulation.created_at.isoformat() if simulation.created_at else None,
        "updated_at": simulation.updated_at.isoformat() if simulation.updated_at else None,
        "created_by": serialize_user_brief(simulation.created_by)  # type: ignore[arg-type]
        if simulation.created_by
        else None,
    }


def serialize_template(t: SimulationTemplate) -> dict[str, Any]:
    return {
        "id": t.id,
        "name": t.name,
        "description": t.description,
        "commands": t.commands,
        "prerequisites": t.prerequisites,
        "techniques": _enrich_techniques(t.techniques or []),
        "tactics": _enrich_tactics(t.tactic_ids or []),
        "created_at": t.created_at.isoformat() if t.created_at else None,
        "updated_at": t.updated_at.isoformat() if t.updated_at else None,
        "created_by": serialize_user_brief(t.created_by)  # type: ignore[arg-type]
        if t.created_by
        else None,
    }


def serialize_engagement(engagement: Engagement) -> dict[str, Any]:
    return {
        "id": engagement.id,
        "name": engagement.name,
        "description": engagement.description,
        "start_date": engagement.start_date.isoformat() if engagement.start_date else None,
        "end_date": engagement.end_date.isoformat() if engagement.end_date else None,
        "status": engagement.status.value,
        "created_at": engagement.created_at.isoformat() if engagement.created_at else None,
        "created_by": serialize_user_brief(engagement.created_by)  # type: ignore[arg-type]
        if engagement.created_by
        else None,
    }