"""cf scenario — применить именованный сценарий (baseline/optimistic/pessimistic)."""
import typer

from application.scenarios import DEFAULT_SCENARIOS
from infrastructure.cli.i18n import t
from infrastructure.cli.services import (
    build_services,
    console,
    convert_value,
    fmt_amount,
    load_model,
    resolve_currency,
)

app = typer.Typer()

CURRENCY_OPTION = typer.Option(None, "--currency", "-c", help=t("cmd.forecast.opt.currency"))


@app.command()
def scenario(
    name: str = typer.Argument("baseline", help=t("cmd.scenario.arg.name")),
    months: int = typer.Option(12, "--months", "-m", help=t("cmd.scenario.opt.months")),
    currency: str | None = CURRENCY_OPTION,
) -> None:
    """Применить сценарий и показать прогноз"""
    model = load_model()
    target_curr, symbol = resolve_currency(model, currency)
    _, scenario_service, _, converter = build_services(model)
    base_curr = model.base_currency

    if name in DEFAULT_SCENARIOS:
        scenario_obj = DEFAULT_SCENARIOS[name]
    else:
        console.print(f"[red]{t('cmd.scenario.err.unknown', name=name)}[/red]")
        console.print(t("cmd.scenario.err.available", scenarios=", ".join(DEFAULT_SCENARIOS.keys())))
        raise typer.Exit(1)

    result = scenario_service.apply(scenario_obj, months)
    balance = convert_value(converter, result["total_balance"], base_curr, target_curr)
    income = convert_value(converter, result["total_income"], base_curr, target_curr)
    expenses = convert_value(converter, result["total_expenses"], base_curr, target_curr)
    console.print(f"[bold]{t('cmd.scenario.label')}:[/bold] {result['scenario']}")
    console.print(f"[dim]{result['scenario_description']}[/dim]")
    console.print(f"{t('cmd.scenario.label.balance')}: {fmt_amount(balance, target_curr, symbol)}")
    console.print(f"{t('cmd.scenario.label.income')}: {fmt_amount(income, target_curr, symbol)}")
    console.print(f"{t('cmd.scenario.label.expenses')}: {fmt_amount(expenses, target_curr, symbol)}")