import { ChevronLeft, ChevronRight, Loader2, TrendingUp } from 'lucide-react';
import { useNavigate } from 'react-router-dom';

import { useBudget } from '@/hooks/useBudget';
import { formatAmount } from '@/lib/format';
import { cn } from '@/lib/utils';
import { Button } from '@/components/ui/button';
import { Card, CardContent } from '@/components/ui/card';
import ErrorState from '@/components/ErrorState';
import YearlyOverview from '@/components/budget/YearlyOverview';

const MIN_YEAR = 2026;
const MAX_YEAR = 2030;

export default function Proyecciones() {
  const currentYear = Math.max(MIN_YEAR, new Date().getFullYear());
  const {
    year,
    setYear,
    setSelectedMonth,
    projection,
    loading,
    error,
    refresh,
    saveBalanceOverride,
    clearBalanceOverride,
  } = useBudget(currentYear);

  const navigate = useNavigate();

  return (
    <div className="space-y-6">
      {/* Header */}
      <div className="flex items-center justify-between">
        <div className="flex items-center gap-3">
          <TrendingUp className="w-6 h-6 text-primary" />
          <h1 className="text-2xl font-bold tracking-tight">Proyecciones</h1>
        </div>
        <div className="flex items-center gap-1">
          <Button variant="outline" size="icon" disabled={year <= MIN_YEAR} onClick={() => setYear(year - 1)}>
            <ChevronLeft className="w-4 h-4" />
          </Button>
          <span className="w-16 text-center font-semibold tabular-nums">{year}</span>
          <Button variant="outline" size="icon" disabled={year >= MAX_YEAR} onClick={() => setYear(year + 1)}>
            <ChevronRight className="w-4 h-4" />
          </Button>
        </div>
      </div>

      {/* Annual summary cards */}
      {projection && (
        <div className="grid gap-3 grid-cols-1 md:grid-cols-3">
          <Card>
            <CardContent className="pt-4 pb-3 px-4">
              <p className="text-xs text-muted-foreground">Ingresos Anuales</p>
              <p data-sensitive className="text-lg font-bold font-mono text-primary">
                {formatAmount(projection.annual_income, 'CRC')}
              </p>
            </CardContent>
          </Card>
          <Card>
            <CardContent className="pt-4 pb-3 px-4">
              <p className="text-xs text-muted-foreground">Egresos Anuales</p>
              <p data-sensitive className="text-lg font-bold font-mono">
                {formatAmount(projection.annual_expenses, 'CRC')}
              </p>
            </CardContent>
          </Card>
          <Card>
            <CardContent className="pt-4 pb-3 px-4">
              <p className="text-xs text-muted-foreground">Balance Neto Anual</p>
              <p
                data-sensitive
                className={cn(
                  'text-lg font-bold font-mono',
                  projection.annual_net >= 0 ? 'text-primary' : 'text-destructive',
                )}
              >
                {projection.annual_net >= 0 ? '+' : ''}
                {formatAmount(projection.annual_net, 'CRC')}
              </p>
            </CardContent>
          </Card>
        </div>
      )}

      {/* Yearly table */}
      {loading ? (
        <div className="flex items-center justify-center py-12">
          <Loader2 className="w-6 h-6 animate-spin text-muted-foreground" />
        </div>
      ) : projection ? (
        <Card>
          <CardContent className="p-0">
            {error ? (
        <ErrorState onRetry={refresh} />
      ) : (
      <YearlyOverview
              months={projection.months}
              selectedMonth={0}
              year={year}
              onSelectMonth={(m) => {
                setSelectedMonth(m);
                navigate('/budget');
              }}
              onSaveOverride={async (month, value) => {
                await saveBalanceOverride(year, month, value);
              }}
              onClearOverride={async (month) => {
                await clearBalanceOverride(year, month);
              }}
            />
      )}
          </CardContent>
        </Card>
      ) : null}
    </div>
  );
}