from pathlib import Path

import typer
from rich.console import Console
from rich.table import Table

from cashflow_model import (
    Account,
    Asset,
    ExchangeRate,
    FinancialModel,
    Liability,
    RecurringCashflow,
    Transaction,
)
from cli.i18n import t

app = typer.Typer(name="config", help=t("config.help"))
console = Console()

DATA_DIR = Path("data")
MODEL_PATH = DATA_DIR / "model.json"


def _load_model() -> FinancialModel:
    if MODEL_PATH.exists():
        return FinancialModel.load(MODEL_PATH)
    return FinancialModel()


def _save_model(model: FinancialModel) -> None:
    model.save(MODEL_PATH)


# ── base-currency ──────────────────────────────────────────────


@app.command()
def base_currency(
    currency: str = typer.Argument(None, help=t("cmd.config.base_currency.arg")),
) -> None:
    """Показать или установить базовую валюту модели"""
    model = _load_model()
    if currency:
        model.base_currency = currency.upper()
        _save_model(model)
        ok = t("global.ok")
        msg = t("cmd.config.base_currency.ok", currency=model.base_currency)
        console.print(f"[green]{ok}[/green] {msg}")
    else:
        console.print(t("cmd.config.base_currency.show", currency=f"[bold]{model.base_currency}[/bold]"))


# ── rate ───────────────────────────────────────────────────────


@app.command()
def rate_set(
    from_currency: str = typer.Argument(..., help=t("cmd.config.rate_set.arg.from")),
    to_currency: str = typer.Argument(..., help=t("cmd.config.rate_set.arg.to")),
    rate: float = typer.Argument(..., help=t("cmd.config.rate_set.arg.rate")),
) -> None:
    """Добавить или обновить курс валюты"""
    model = _load_model()
    fc, tc = from_currency.upper(), to_currency.upper()
    existing = [r for r in model.exchange_rates if r.from_currency == fc and r.to_currency == tc]
    if existing:
        existing[0].rate = rate
    else:
        model.exchange_rates.append(ExchangeRate(
            from_currency=from_currency.upper(),
            to_currency=to_currency.upper(),
            rate=rate,
        ))
    _save_model(model)
    fc, tc = from_currency.upper(), to_currency.upper()
    console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.rate_set.ok', fc=fc, tc=tc, rate=rate)}")


@app.command(name="rate-list")
def rate_list() -> None:
    """Список курсов валют"""
    model = _load_model()
    if not model.exchange_rates:
        console.print(f"[yellow]{t('cmd.config.rate_list.empty')}[/yellow]")
        return
    table = Table(title=t("table.rates.title"))
    table.add_column(t("table.rates.col.from"), style="cyan")
    table.add_column(t("table.rates.col.to"), style="cyan")
    table.add_column(t("table.rates.col.rate"), justify="right")
    for r in model.exchange_rates:
        table.add_row(r.from_currency, r.to_currency, str(r.rate))
    console.print(table)


@app.command(name="rate-remove")
def rate_remove(
    from_currency: str = typer.Argument(..., help=t("cmd.config.rate_set.arg.from")),
    to_currency: str = typer.Argument(..., help=t("cmd.config.rate_set.arg.to")),
) -> None:
    """Удалить курс валюты"""
    model = _load_model()
    fc, tc = from_currency.upper(), to_currency.upper()
    initial = len(model.exchange_rates)
    model.exchange_rates = [
        r for r in model.exchange_rates
        if not (r.from_currency == fc and r.to_currency == tc)
    ]
    if len(model.exchange_rates) < initial:
        _save_model(model)
        console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.rate_remove.ok', fc=fc, tc=tc)}")
    else:
        console.print(f"[red]{t('cmd.config.rate_remove.err', fc=fc, tc=tc)}[/red]")
        raise typer.Exit(1)


# ── account ────────────────────────────────────────────────────


@app.command()
def account_add(
    name: str = typer.Option(..., "--name", "-n", help=t("cmd.config.account_add.opt.name")),
    balance: float = typer.Option(0.0, "--balance", "-b", help=t("cmd.config.account_add.opt.balance")),
    currency: str = typer.Option("", "--currency", "-c", help=t("cmd.config.account_add.opt.currency")),
) -> None:
    """Добавить счёт"""
    model = _load_model()
    curr = currency.upper() if currency else model.base_currency
    account = Account(name=name, balance=balance, currency=curr)
    model.accounts.append(account)
    _save_model(model)
    ok = t("global.ok")
    msg = t("cmd.config.account_add.ok", name=name, balance=balance, currency=curr)
    console.print(f"[green]{ok}[/green] {msg}")


@app.command(name="account-list")
def account_list() -> None:
    """Список счетов"""
    model = _load_model()
    if not model.accounts:
        console.print(f"[yellow]{t('cmd.config.account_list.empty')}[/yellow]")
        return
    table = Table(title=t("table.accounts_config.title"))
    table.add_column(t("table.accounts_config.col.id"), style="dim")
    table.add_column(t("table.accounts_config.col.name"), style="cyan")
    table.add_column(t("table.accounts_config.col.currency"))
    table.add_column(t("table.accounts_config.col.balance"), justify="right")
    for a in model.accounts:
        table.add_row(str(a.id)[:8], a.name, a.currency, f"{a.balance:,.2f}")
    console.print(table)


@app.command(name="account-remove")
def account_remove(
    identifier: str = typer.Argument(..., help=t("cmd.config.account_remove.arg")),
) -> None:
    """Удалить счёт по ID или названию"""
    model = _load_model()
    initial = len(model.accounts)
    model.accounts = [
        a for a in model.accounts
        if str(a.id) != identifier and a.name != identifier
    ]
    if len(model.accounts) < initial:
        _save_model(model)
        console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.account_remove.ok', id=identifier)}")
    else:
        console.print(f"[red]{t('cmd.config.account_remove.err', id=identifier)}[/red]")
        raise typer.Exit(1)


# ── transaction ────────────────────────────────────────────────


@app.command()
def transaction_add(
    account: str = typer.Option(..., "--account", "-a", help=t("cmd.config.transaction_add.opt.account")),
    amount: float = typer.Option(..., "--amount", "-m", help=t("cmd.config.transaction_add.opt.amount")),
    category: str = typer.Option("", "--category", "-c", help=t("cmd.config.transaction_add.opt.category")),
    description: str = typer.Option("", "--description", "-d", help=t("cmd.config.transaction_add.opt.description")),
    date: str = typer.Option("", "--date", "-D", help=t("cmd.config.transaction_add.opt.date")),
) -> None:
    """Добавить транзакцию"""
    model = _load_model()
    account_id = _resolve_account_id(model, account)
    if not account_id:
        console.print(f"[red]{t('cmd.config.transaction_add.err', account=account)}[/red]")
        raise typer.Exit(1)
    txn = Transaction(
        date=date or "",
        account=account_id,
        category=category,
        amount=amount,
        description=description,
    )
    model.transactions.append(txn)
    _save_model(model)
    kind = t("cmd.config.transaction_add.kind.income") if amount >= 0 else t("cmd.config.transaction_add.kind.expense")
    ok = t("global.ok")
    msg = t("cmd.config.transaction_add.ok", kind=kind, amount=abs(amount), account=account)
    console.print(f"[green]{ok}[/green] {msg}")


@app.command(name="transaction-list")
def transaction_list() -> None:
    """Список транзакций"""
    model = _load_model()
    if not model.transactions:
        console.print(f"[yellow]{t('cmd.config.transaction_list.empty')}[/yellow]")
        return
    table = Table(title=t("table.transactions.title"))
    table.add_column(t("table.accounts_config.col.id"), style="dim")
    table.add_column(t("table.transactions.col.date"))
    table.add_column(t("table.accounts_config.col.name"))
    table.add_column(t("table.transactions.col.category"))
    table.add_column(t("table.transactions.col.amount"), justify="right")
    table.add_column(t("table.transactions.col.description"))
    for tx in model.transactions:
        account_name = _account_name(model, tx.account)
        table.add_row(
            str(tx.id)[:8], tx.date, account_name, tx.category,
            f"{tx.amount:,.2f}", tx.description,
        )
    console.print(table)


@app.command(name="transaction-remove")
def transaction_remove(
    identifier: str = typer.Argument(..., help=t("cmd.config.transaction_remove.arg")),
) -> None:
    """Удалить транзакцию по ID"""
    model = _load_model()
    initial = len(model.transactions)
    model.transactions = [t for t in model.transactions if str(t.id) != identifier]
    if len(model.transactions) < initial:
        _save_model(model)
        console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.transaction_remove.ok', id=identifier)}")
    else:
        console.print(f"[red]{t('cmd.config.transaction_remove.err', id=identifier)}[/red]")
        raise typer.Exit(1)


# ── recurring ──────────────────────────────────────────────────


@app.command()
def recurring_add(
    amount: float = typer.Option(..., "--amount", "-m", help=t("cmd.config.recurring_add.opt.amount")),
    category: str = typer.Option("", "--category", "-c", help=t("cmd.config.recurring_add.opt.category")),
    frequency: str = typer.Option("monthly", "--frequency", "-f", help=t("cmd.config.recurring_add.opt.frequency")),
    start_date: str = typer.Option("", "--start", "-s", help=t("cmd.config.recurring_add.opt.start")),
    end_date: str = typer.Option("", "--end", "-e", help=t("cmd.config.recurring_add.opt.end")),
) -> None:
    """Добавить регулярный платёж"""
    model = _load_model()
    rc = RecurringCashflow(
        start_date=start_date or "", end_date=end_date or "",
        frequency=frequency, amount=amount, category=category,
    )
    model.recurring.append(rc)
    _save_model(model)
    ok = t("global.ok")
    msg = t("cmd.config.recurring_add.ok", amount=abs(amount), frequency=frequency)
    console.print(f"[green]{ok}[/green] {msg}")


@app.command(name="recurring-list")
def recurring_list() -> None:
    """Список регулярных платежей"""
    model = _load_model()
    if not model.recurring:
        console.print(f"[yellow]{t('cmd.config.recurring_list.empty')}[/yellow]")
        return
    table = Table(title=t("table.recurring.title"))
    table.add_column(t("table.recurring.col.id"), style="dim")
    table.add_column(t("table.recurring.col.start"))
    table.add_column(t("table.recurring.col.end"))
    table.add_column(t("table.recurring.col.period"))
    table.add_column(t("table.recurring.col.amount"), justify="right")
    table.add_column(t("table.recurring.col.category"))
    for r in model.recurring:
        row = (str(r.id)[:8], r.start_date, r.end_date, r.frequency, f"{r.amount:,.2f}", r.category)
        table.add_row(*row)
    console.print(table)


@app.command(name="recurring-remove")
def recurring_remove(
    identifier: str = typer.Argument(..., help=t("cmd.config.recurring_remove.arg")),
) -> None:
    """Удалить регулярный платёж по ID"""
    model = _load_model()
    initial = len(model.recurring)
    model.recurring = [r for r in model.recurring if str(r.id) != identifier]
    if len(model.recurring) < initial:
        _save_model(model)
        console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.recurring_remove.ok', id=identifier)}")
    else:
        console.print(f"[red]{t('cmd.config.recurring_remove.err', id=identifier)}[/red]")
        raise typer.Exit(1)


# ── asset ──────────────────────────────────────────────────────


@app.command()
def asset_add(
    name: str = typer.Option(..., "--name", "-n", help=t("cmd.config.asset_add.opt.name")),
    value: float = typer.Option(0.0, "--value", "-v", help=t("cmd.config.asset_add.opt.value")),
    growth_rate: float = typer.Option(0.0, "--growth", "-g", help=t("cmd.config.asset_add.opt.growth")),
) -> None:
    """Добавить актив"""
    model = _load_model()
    asset = Asset(name=name, value=value, growth_rate=growth_rate)
    model.assets.append(asset)
    _save_model(model)
    console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.asset_add.ok', name=name, value=value)}")


@app.command(name="asset-list")
def asset_list() -> None:
    """Список активов"""
    model = _load_model()
    if not model.assets:
        console.print(f"[yellow]{t('cmd.config.asset_list.empty')}[/yellow]")
        return
    table = Table(title=t("table.assets.title"))
    table.add_column(t("table.assets.col.id"), style="dim")
    table.add_column(t("table.assets.col.name"), style="cyan")
    table.add_column(t("table.assets.col.value"), justify="right")
    table.add_column(t("table.assets.col.growth"), justify="right")
    for a in model.assets:
        table.add_row(str(a.id)[:8], a.name, f"{a.value:,.2f}", f"{a.growth_rate:.1f}%")
    console.print(table)


@app.command(name="asset-remove")
def asset_remove(
    identifier: str = typer.Argument(..., help=t("cmd.config.asset_remove.arg")),
) -> None:
    """Удалить актив по ID или названию"""
    model = _load_model()
    initial = len(model.assets)
    model.assets = [
        a for a in model.assets
        if str(a.id) != identifier and a.name != identifier
    ]
    if len(model.assets) < initial:
        _save_model(model)
        console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.asset_remove.ok', id=identifier)}")
    else:
        console.print(f"[red]{t('cmd.config.asset_remove.err', id=identifier)}[/red]")
        raise typer.Exit(1)


# ── liability ──────────────────────────────────────────────────


@app.command()
def liability_add(
    name: str = typer.Option(..., "--name", "-n", help=t("cmd.config.liability_add.opt.name")),
    balance: float = typer.Option(0.0, "--balance", "-b", help=t("cmd.config.liability_add.opt.balance")),
    interest: float = typer.Option(0.0, "--interest", "-i", help=t("cmd.config.liability_add.opt.interest")),
    payment: float = typer.Option(0.0, "--payment", "-p", help=t("cmd.config.liability_add.opt.payment")),
) -> None:
    """Добавить обязательство"""
    model = _load_model()
    liability = Liability(name=name, balance=balance, interest=interest, payment=payment)
    model.liabilities.append(liability)
    _save_model(model)
    console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.liability_add.ok', name=name, balance=balance)}")


@app.command(name="liability-list")
def liability_list() -> None:
    """Список обязательств"""
    model = _load_model()
    if not model.liabilities:
        console.print(f"[yellow]{t('cmd.config.liability_list.empty')}[/yellow]")
        return
    table = Table(title=t("table.liabilities.title"))
    table.add_column(t("table.liabilities.col.id"), style="dim")
    table.add_column(t("table.liabilities.col.name"), style="cyan")
    table.add_column(t("table.liabilities.col.balance"), justify="right")
    table.add_column(t("table.liabilities.col.rate"), justify="right")
    table.add_column(t("table.liabilities.col.payment"), justify="right")
    for li in model.liabilities:
        b, i, p = f"{li.balance:,.2f}", f"{li.interest:.1f}%", f"{li.payment:,.2f}"
        row = (str(li.id)[:8], li.name, b, i, p)
        table.add_row(*row)
    console.print(table)


@app.command(name="liability-remove")
def liability_remove(
    identifier: str = typer.Argument(..., help=t("cmd.config.liability_remove.arg")),
) -> None:
    """Удалить обязательство по ID или названию"""
    model = _load_model()
    initial = len(model.liabilities)
    model.liabilities = [
        li for li in model.liabilities
        if str(li.id) != identifier and li.name != identifier
    ]
    if len(model.liabilities) < initial:
        _save_model(model)
        console.print(f"[green]{t('global.ok')}[/green] {t('cmd.config.liability_remove.ok', id=identifier)}")
    else:
        console.print(f"[red]{t('cmd.config.liability_remove.err', id=identifier)}[/red]")
        raise typer.Exit(1)


# ── helpers ────────────────────────────────────────────────────


def _resolve_account_id(model: FinancialModel, identifier: str) -> str | None:
    for a in model.accounts:
        if str(a.id) == identifier or a.name == identifier:
            return str(a.id)
    return None


def _account_name(model: FinancialModel, account_id: str) -> str:
    for a in model.accounts:
        if str(a.id) == account_id:
            return a.name
    return account_id[:8]