"""Tests fuer die Final-Review-Findings F2, F3, F6."""
from datetime import date
from decimal import Decimal

from app.models.tables import (ProjectionPoint, ProjectionResult, Scenario,
                               Statement, Transaction)

H = {"Authorization": "Bearer test-key"}


def _account(client, iban="DE01"):
    return client.post("/api/accounts", headers=H, json={
        "bank": "DKB", "iban": iban, "name": "G", "type": "giro"}).json()


# ----------------------------------------------------------------- F2 cascades
def test_delete_projected_scenario_removes_dependent_rows(client, db):
    sc = client.post("/api/scenarios", headers=H, json={"name": "Basis"}).json()
    sid = sc["id"]
    r = client.post(f"/api/scenarios/{sid}/project", headers=H,
                    params={"horizon_days": 10, "start_date": "2026-07-15"})
    assert r.status_code == 200
    assert db.query(ProjectionPoint).filter_by(scenario_id=sid).count() > 0
    assert db.get(ProjectionResult, sid) is not None

    assert client.delete(f"/api/scenarios/{sid}", headers=H).status_code == 204
    db.expire_all()
    assert db.get(Scenario, sid) is None
    assert db.query(ProjectionPoint).filter_by(scenario_id=sid).count() == 0
    assert db.get(ProjectionResult, sid) is None


def test_delete_loan_assigned_to_scenario(client):
    loan = client.post("/api/loans", headers=H, json={
        "name": "K1", "principal": "5000.00", "annual_rate_pct": "6.0",
        "term_months": 48, "payout_date": "2026-07-20"}).json()
    sc = client.post("/api/scenarios", headers=H, json={"name": "Kredit"}).json()
    assert client.post(f"/api/scenarios/{sc['id']}/loans/{loan['id']}",
                       headers=H).status_code == 204
    assert client.delete(f"/api/loans/{loan['id']}", headers=H).status_code == 204


def test_delete_confirmed_import_returns_409(client, db):
    acc = _account(client)
    db.add(Statement(filename="s.pdf", bank="dkb", account_id=acc["id"],
                     status="confirmed"))
    db.commit()
    sid = db.query(Statement).one().id
    assert client.delete(f"/api/imports/{sid}", headers=H).status_code == 409


# --------------------------------------------------------------- F3 validation
def test_recurring_invalid_rhythm_422(client):
    r = client.post("/api/recurring", headers=H, json={
        "name": "X", "amount": "-1.00", "rhythm": "weekly", "due_day": 1})
    assert r.status_code == 422


def test_recurring_due_day_zero_422(client):
    r = client.post("/api/recurring", headers=H, json={
        "name": "X", "amount": "-1.00", "rhythm": "monthly", "due_day": 0})
    assert r.status_code == 422


def test_loan_invalid_repayment_type_422(client):
    r = client.post("/api/loans", headers=H, json={
        "name": "K", "principal": "1000.00", "annual_rate_pct": "3.0",
        "term_months": 12, "payout_date": "2026-08-01",
        "repayment_type": "balloon"})
    assert r.status_code == 422


def test_modifier_invalid_kind_422(client):
    sc = client.post("/api/scenarios", headers=H, json={"name": "S"}).json()
    r = client.post(f"/api/scenarios/{sc['id']}/modifiers", headers=H, json={
        "target_type": "category", "target_id": 1, "kind": "double",
        "value": "10"})
    assert r.status_code == 422


# ------------------------------------------------------- F6 409/404 statt 500
def test_patch_scenario_rename_clash_409(client):
    client.post("/api/scenarios", headers=H, json={"name": "A"})
    b = client.post("/api/scenarios", headers=H, json={"name": "B"}).json()
    r = client.patch(f"/api/scenarios/{b['id']}", headers=H, json={"name": "A"})
    assert r.status_code == 409


def test_create_transaction_unknown_account_404(client):
    r = client.post("/api/transactions", headers=H, json={
        "account_id": 9999, "booking_date": "2026-07-01",
        "amount": "-10.00", "purpose": "X", "counterparty": ""})
    assert r.status_code == 404