# Copyright (C) 2026 Danilo M. <danix@danix.xyz>  GPL-2.0-only
import calendar
from datetime import date
from firefly_cli import registry, output


def _current_month():
    """(first, last) ISO dates for the current calendar month."""
    today = date.today()
    last_day = calendar.monthrange(today.year, today.month)[1]
    first = today.replace(day=1).isoformat()
    last = today.replace(day=last_day).isoformat()
    return first, last


def _spent_scalar(budget_obj):
    """Sum a budget's nested `spent` array into a single number (for --human).
    Firefly sends spent as a per-currency list of {sum: "-12.34", ...}; we sum
    the sums. JSON output is untouched; this only feeds the table view."""
    total = 0.0
    for entry in budget_obj.get("spent") or []:
        try:
            total += float(entry.get("sum", 0))
        except (TypeError, ValueError):
            pass
    return f"{total:.2f}"


def _list_args(p):
    p.add_argument("--start", default=None, help="YYYY-MM-DD (default: 1st of this month)")
    p.add_argument("--end", default=None, help="YYYY-MM-DD (default: last of this month)")

@registry.command("budget list", help="list budgets with spent for a period (default: current month)", args=_list_args)
def cmd_list(args, ctx):
    first, last = _current_month()
    params = {"start": args.start or first, "end": args.end or last}
    resp = ctx.client.request("GET", "/api/v1/budgets", params=params)
    rows = output.unwrap(resp)
    if ctx.human and isinstance(rows, list):
        # Replace the nested spent array with a scalar so the table shows it.
        rows = [{**r, "spent": _spent_scalar(r)} for r in rows]
    output.emit(rows, human=ctx.human)
    return 0