from fastapi import HTTPException, status

from app.repositories.audit import create_audit_event
from app.repositories.scheme_version_pricing import replace_scheme_version_pricing_snapshot
from app.repositories.scheme_versions import get_current_scheme_version
from app.repositories.schemes import get_scheme_record_by_scheme_id, publish_scheme
from app.services.scheme_validation import build_scheme_validation_report


async def publish_current_draft_scheme(
    *,
    scheme_id: str,
) -> dict:
    scheme = await get_scheme_record_by_scheme_id(scheme_id)
    version = await get_current_scheme_version(
        scheme_id=scheme.scheme_id,
        current_version_number=scheme.current_version_number,
    )

    if scheme.status != "draft" or version.status != "draft":
        raise HTTPException(
            status_code=status.HTTP_409_CONFLICT,
            detail="Current scheme version is not publishable because it is not in draft state",
        )

    validation = await build_scheme_validation_report(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
    )

    if not validation["summary"]["is_publishable"]:
        raise HTTPException(
            status_code=status.HTTP_409_CONFLICT,
            detail="Scheme is not publishable in current state",
        )

    snapshot = await replace_scheme_version_pricing_snapshot(
        scheme_id=scheme.scheme_id,
        scheme_version_id=version.scheme_version_id,
    )

    published_row = await publish_scheme(scheme.scheme_id)

    await create_audit_event(
        scheme_id=published_row.scheme_id,
        event_type="scheme.published",
        object_type="scheme",
        object_ref=published_row.scheme_id,
        details={
            "current_version_number": published_row.current_version_number,
            "status": published_row.status,
            "pricing_snapshot": snapshot,
            "scheme_version_id": version.scheme_version_id,
        },
    )

    return {
        "scheme_id": published_row.scheme_id,
        "scheme_version_id": version.scheme_version_id,
        "status": published_row.status,
        "current_version_number": published_row.current_version_number,
        "published_at": published_row.published_at.isoformat() if published_row.published_at else None,
        "pricing_snapshot": snapshot,
        "validation_summary": validation["summary"],
    }