"""Tests for the /billing CLI handler (cli.py::_show_billing).

Focus on the non-interactive (no live prompt_toolkit app) path — the same
discipline as the /credits non-interactive test: it must render text, never
invoke the modal (which would read the slash-worker's JSON-RPC stdin and hang).
Plus role/kill-switch gating and logged-out handling.
"""

from __future__ import annotations

from decimal import Decimal

import pytest

import agent.billing_view as bv
from agent.billing_view import BillingState, CardInfo, MonthlyCap
from cli import HermesCLI


@pytest.fixture
def cli():
    obj = HermesCLI.__new__(HermesCLI)  # bypass __init__ (no full app needed)
    obj._app = None  # non-interactive: forces the text path
    return obj


def _boom_modal(*a, **kw):
    raise AssertionError("modal must NOT be called in non-interactive mode")


def test_billing_logged_out(cli, monkeypatch, capsys):
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: BillingState(logged_in=False))
    cli._show_billing("/billing")
    out = capsys.readouterr().out
    assert "Not logged into Nous Portal" in out
    assert "hermes portal" in out


def test_billing_overview_non_interactive_renders_text_not_modal(cli, monkeypatch, capsys):
    monkeypatch.setattr(HermesCLI, "_prompt_text_input_modal", _boom_modal, raising=False)
    state = BillingState(
        logged_in=True,
        org_name="Acme",
        role="OWNER",
        balance_usd=Decimal("142.5"),
        cli_billing_enabled=True,
        charge_presets=(Decimal("100"),),
        monthly_cap=MonthlyCap(limit_usd=Decimal("1000"), spent_this_month_usd=Decimal("180"),
                               is_default_ceiling=True),
        portal_url="https://portal/billing?topup=open",
    )
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: state)
    cli._show_billing("/billing")
    out = capsys.readouterr().out
    assert "Usage credits" in out
    assert "$142.50" in out
    assert "$180 of $1000 used (default ceiling)" in out
    # New design: a spend bar with a percentage on the overview.
    assert "%" in out and ("█" in out or "░" in out)
    # ZERO sub-commands: no /billing buy|auto-reload|limit advertising.
    assert "/billing buy" not in out
    assert "Actions:" not in out
    # Non-interactive funnels to the portal (the URL is the affordance).
    assert "Manage on portal:" in out


def test_billing_member_cannot_charge(cli, monkeypatch, capsys):
    state = BillingState(
        logged_in=True, role="MEMBER", balance_usd=Decimal("10"),
        cli_billing_enabled=True, portal_url="https://portal/billing",
    )
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: state)
    cli._show_billing("/billing")
    out = capsys.readouterr().out
    assert "require an org admin/owner" in out


def test_billing_killswitch_off_blocks(cli, monkeypatch, capsys):
    state = BillingState(
        logged_in=True, role="OWNER", balance_usd=Decimal("10"),
        cli_billing_enabled=False, portal_url="https://portal/billing",
    )
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: state)
    cli._show_billing("/billing")
    out = capsys.readouterr().out
    assert "turned off for this org" in out


def test_billing_limit_screen_readonly(cli, monkeypatch, capsys):
    state = BillingState(
        logged_in=True, role="OWNER", cli_billing_enabled=True,
        monthly_cap=MonthlyCap(limit_usd=Decimal("1000"), spent_this_month_usd=Decimal("250"),
                               is_default_ceiling=True),
        portal_url="https://portal/billing",
    )
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: state)
    # ZERO sub-commands: the limit screen is reached via the menu, never a
    # sub-command — call it directly the way the overview menu would.
    cli._billing_limit_screen(state)
    out = capsys.readouterr().out
    assert "Monthly spend limit" in out
    assert "$250 of $1000 used" in out
    assert "read-only" in out


def test_billing_sub_arg_ignored_opens_overview(cli, monkeypatch, capsys):
    # A stray sub-arg must NOT error and must NOT dispatch to a sub-screen —
    # it just opens the overview (spec §0.4: zero sub-commands).
    monkeypatch.setattr(HermesCLI, "_prompt_text_input_modal", _boom_modal, raising=False)
    state = BillingState(
        logged_in=True, role="OWNER", balance_usd=Decimal("142.5"),
        cli_billing_enabled=True, charge_presets=(Decimal("25"),),
        portal_url="https://portal/billing",
    )
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: state)
    cli._show_billing("/billing buy")  # arg is ignored
    out = capsys.readouterr().out
    assert "Usage credits" in out  # overview, NOT the buy screen
    assert "Buy usage credits" not in out


def test_billing_buy_non_interactive_defers_to_portal(cli, monkeypatch, capsys):
    monkeypatch.setattr(HermesCLI, "_prompt_text_input_modal", _boom_modal, raising=False)
    state = BillingState(
        logged_in=True, role="OWNER", cli_billing_enabled=True,
        charge_presets=(Decimal("25"), Decimal("50"), Decimal("100")),
        card=CardInfo(brand="visa", last4="4242"),
        portal_url="https://portal/billing",
    )
    monkeypatch.setattr(bv, "build_billing_state", lambda *a, **kw: state)
    # Reached via the menu in real use; non-interactively it defers to the portal.
    cli._billing_buy_flow(state)
    out = capsys.readouterr().out
    assert "Buy usage credits" in out
    assert "$25" in out and "$50" in out and "$100" in out
    assert "interactive CLI" in out  # defers; no charge attempted non-interactively