"""A settled payment is credited through the credit ledger, so the owner's history shows it.

What these tests defend:

* settling a pending payment as succeeded writes exactly one ``adjustment`` history row with the
  reason ``billing/settle-payment`` and the payment's amount, the wallet goes up by that amount
  once, and the organization's ``last_credit_at`` is set
* settling the same payment again changes nothing: the payment is already final, so neither the
  wallet nor the history moves
* a failed payment credits nothing and writes no history row
"""

from __future__ import annotations

from app.application.container import build_billing_service
from app.domain.base import new_id
from app.domain.billing.models import CreditKind, Payment, PaymentStatus
from app.domain.identity.models import PlatformRole
from app.infrastructure.db.models import OrganizationRow, UserRow
from app.infrastructure.repositories.billing import CreditWalletRepository, PaymentRepository
from app.infrastructure.repositories.credit import CreditLedgerRepository

SETTLE_REASON = "billing/settle-payment"


async def _org_with_pending_payment(
    session_factory, slug: str, amount: float
) -> tuple[str, str]:
    """Create an organization and one pending payment; return (organization id, payment id)."""
    async with session_factory() as session:
        user = UserRow(
            id=new_id(),
            email=f"{slug}@example.com",
            password_hash="x",
            name="t",
            platform_role=PlatformRole.MANAGER.value,
        )
        session.add(user)
        await session.flush()
        org = OrganizationRow(id=new_id(), name=slug, slug=slug, owner_user_id=user.id)
        session.add(org)
        await session.flush()
        payment = await PaymentRepository(session).create(
            Payment(organization_id=org.id, amount=amount)
        )
        await session.commit()
    return org.id, payment.id


async def _settle(
    session_factory, organization_id: str, payment_id: str, *, succeeded: bool
) -> Payment:
    """Settle through the service the owner's endpoint calls, in its own transaction."""
    async with session_factory() as session:
        payment = await build_billing_service(session).settle_payment(
            organization_id=organization_id, payment_id=payment_id, succeeded=succeeded
        )
        await session.commit()
    return payment


async def _balance_and_history(session_factory, organization_id: str):
    """The wallet balance and every credit history row of one organization."""
    async with session_factory() as session:
        wallet = await CreditWalletRepository(session).get_for_org(organization_id)
        history = await CreditLedgerRepository(session).history(organization_id)
    return (wallet.balance if wallet else 0.0), history


async def test_a_settled_payment_writes_one_adjustment_row_and_credits_once(session_factory):
    organization_id, payment_id = await _org_with_pending_payment(
        session_factory, "settle-once", 30.0
    )

    payment = await _settle(session_factory, organization_id, payment_id, succeeded=True)

    assert payment.status == PaymentStatus.SUCCEEDED
    balance, history = await _balance_and_history(session_factory, organization_id)
    assert balance == 30.0
    assert [(t.kind, t.amount, t.balance_after, t.reason) for t in history] == [
        (CreditKind.ADJUSTMENT, 30.0, 30.0, SETTLE_REASON)
    ]
    async with session_factory() as session:
        last_credit_at = await CreditLedgerRepository(session).last_credit_at_by_org()
    assert organization_id in last_credit_at


async def test_settling_the_same_payment_twice_does_not_credit_twice(session_factory):
    organization_id, payment_id = await _org_with_pending_payment(
        session_factory, "settle-twice", 30.0
    )
    await _settle(session_factory, organization_id, payment_id, succeeded=True)

    again = await _settle(session_factory, organization_id, payment_id, succeeded=True)

    assert again.status == PaymentStatus.SUCCEEDED
    balance, history = await _balance_and_history(session_factory, organization_id)
    assert balance == 30.0
    assert len(history) == 1


async def test_a_failed_payment_credits_nothing(session_factory):
    organization_id, payment_id = await _org_with_pending_payment(
        session_factory, "settle-failed", 30.0
    )

    failed = await _settle(session_factory, organization_id, payment_id, succeeded=False)

    assert failed.status == PaymentStatus.FAILED
    balance, history = await _balance_and_history(session_factory, organization_id)
    assert balance == 0.0
    assert history == []