from candidate_forms.plugins import to_percent


def _sections_as_percent(sections):
    if not sections:
        return list(sections) if sections else None
    out = []
    for section in sections:
        item = dict(section)
        if "average" in item:
            item["average"] = to_percent(item.get("average"))
        criteria = item.get("criteria")
        if criteria:
            item["criteria"] = [
                {**c, "rating": to_percent(c.get("rating"))} if isinstance(c, dict) else c
                for c in criteria
            ]
        out.append(item)
    return out


def serialize_form(
    row,
    *,
    candidate_name=None,
    job_title=None,
    interviewer_name=None,
    created_by_name=None,
) -> dict:
    """`candidate_name` / `job_title` / user names come from one batched lookup
    in views — never a lazy per-row load."""
    return {
        "id": str(row.id) if row.id else None,
        "inbox_id": row.inbox_id,
        "manual_upload_candidate_id": (
            str(row.manual_upload_candidate_id) if row.manual_upload_candidate_id else None
        ),
        "job_post_id": str(row.job_post_id) if row.job_post_id else None,
        "candidate_name": candidate_name,
        "job_title": job_title,
        "form_type": row.form_type,
        "interviewer_id": str(row.interviewer_id) if row.interviewer_id else None,
        "interviewer_name": interviewer_name,
        "form_date": row.form_date.isoformat() if row.form_date else None,
        "sections": _sections_as_percent(row.sections),
        "fields": dict(row.fields) if row.fields else {},
        "overall_score": to_percent(row.overall_score),
        "recommendation": row.recommendation,
        "created_by": str(row.created_by) if row.created_by else None,
        "created_by_name": created_by_name,
        "created_at": row.created_at.isoformat() if row.created_at else None,
        "updated_at": row.updated_at.isoformat() if row.updated_at else None,
    }


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


def _enum(value):
    if value is None:
        return None
    return getattr(value, "value", value)


def serialize_requisition_option(row) -> dict:
    """Compact row for a searchable picker: `{job title} - {department}`."""
    title = (row.position_title or "").strip()
    department = (row.department or "").strip()
    return {
        "id": str(row.id) if row.id else None,
        "title": row.position_title,
        "department": row.department,
        "department_id": str(row.department_id) if row.department_id else None,
        "label": f"{title or 'Untitled'} - {department or '—'}",
    }


def serialize_requisition(row) -> dict:
    return {
        "id": str(row.id) if row.id else None,
        "position": {
            "department": row.department,
            "department_id": str(row.department_id) if row.department_id else None,
            "title": row.position_title,
            "date": _date(row.date),
            "date_needed": _date(row.date_needed),
            "type": _enum(row.employment_type),
            "job_description": row.job_description,
            "period_from": _date(row.period_from),
            "period_to": _date(row.period_to),
            "jd_available": row.jd_available,
        },
        "replacement_for": {
            "to_replace": row.to_replace,
            "grade": row.grade,
            "title": row.recruitment_title,
            "date_separated": _date(row.date_separated),
            "justification": row.justification,
            "budget": row.budget,
            "recommended_grade": row.recommended_grade,
        },
        "refferal_by": {
            "employee_name": row.employee_name,
            "employee_department": row.employee_department,
            "entity": row.entity,
        },
        "initiated_by": row.initiated_by,
        "initiated_date": _date(row.initiated_date),
        "recommended_by": row.recommended_by,
        "recommended_date": _date(row.recommended_date),
        "approved_by_hr": row.approved_by_hr,
        "approved_by_date_hr": _date(row.approved_by_date_hr),
        "approved_by_vp": row.approved_by_vp,
        "approved_by_date_vp": _date(row.approved_by_date_vp),
        "approved_by_svp": row.approved_by_svp,
        "approved_by_date_svp": _date(row.approved_by_date_svp),
        "created_by": str(row.created_by) if row.created_by else None,
        "created_at": row.created_at.isoformat() if row.created_at else None,
        "updated_at": row.updated_at.isoformat() if row.updated_at else None,
    }