from django.utils import timezone

from apps.workspaces.models import WorkspaceUserRate


def upsert_workspace_user_rate(workspace, user_id, hourly_rate, currency="USD"):
    currency = currency.upper()
    rate = WorkspaceUserRate.objects.filter(
        workspace=workspace,
        user_id=user_id,
        is_deleted=False,
    ).first()

    if rate:
        update_fields = []
        if rate.hourly_rate != hourly_rate:
            rate.hourly_rate = hourly_rate
            update_fields.append("hourly_rate")
        if rate.currency != currency:
            rate.currency = currency
            update_fields.append("currency")
        if not rate.is_active:
            rate.is_active = True
            update_fields.append("is_active")
        if update_fields:
            update_fields.append("updated_at")
            rate.save(update_fields=update_fields)
        return rate

    return WorkspaceUserRate.objects.create(
        workspace=workspace,
        user_id=user_id,
        hourly_rate=hourly_rate,
        currency=currency,
        effective_from=timezone.now(),
        is_active=True,
    )


def update_workspace_user_rate(rate_instance, **kwargs):
    if "currency" in kwargs and kwargs["currency"]:
        kwargs["currency"] = kwargs["currency"].upper()

    update_fields = []
    for field, value in kwargs.items():
        if hasattr(rate_instance, field) and getattr(rate_instance, field) != value:
            setattr(rate_instance, field, value)
            update_fields.append(field)

    if update_fields:
        update_fields.append("updated_at")
        rate_instance.save(update_fields=update_fields)

    return rate_instance