"""Dashboard: KPIs, gastos por mês e por fornecedor, últimas notas."""

from __future__ import annotations

from fastapi import APIRouter, Request

from .. import database as db
from ..storage import money
from ..templating import render

router = APIRouter()

_MESES = ["jan", "fev", "mar", "abr", "mai", "jun", "jul", "ago", "set", "out", "nov", "dez"]


def _mes_label(ym: str) -> str:
    try:
        year, month = ym.split("-")
        return f"{_MESES[int(month) - 1]}/{year}"
    except (ValueError, IndexError):
        return ym


@router.get("/")
def dashboard(request: Request):
    with db.session() as conn:
        totals = db.overall_totals(conn)
        months = [dict(r) for r in db.monthly_totals(conn)]
        suppliers = [dict(r) for r in db.supplier_totals(conn, limit=8)]
        recent = [dict(r) for r in db.list_fiscal(conn)][:10]

    max_month = max((m["total"] for m in months), default=0) or 1
    for m in months:
        m["label"] = _mes_label(m["month"])
        m["pct"] = round(m["total"] / max_month * 100, 1)
    max_sup = max((s["total"] for s in suppliers), default=0) or 1
    for s in suppliers:
        s["pct"] = round(s["total"] / max_sup * 100, 1)

    return render(
        request,
        "dashboard.html",
        totals=totals,
        months=months,
        suppliers=suppliers,
        recent=recent,
        money=money,
    )