import { type ReactNode } from 'react';
import { TrendingUp, TrendingDown } from 'lucide-react';
import i18n from '@/i18n';

// 云厂商中文标签（主组件 + 弹窗共享） // Logan.Li
export const providerLabels: Record<string, string> = {
  aliyun: i18n.t('cloud.aliyun'),
  tencent: i18n.t('cloud.tencent'),
  aws: 'AWS',
  huawei: i18n.t('cloud.huawei'),
  azure: 'Azure',
};

// 云厂商品牌色（跨主题固定，用 hex 避免 Tailwind 硬编码） // Logan.Li
export const providerHex: Record<string, string> = {
  aliyun: '#FF6A00',
  tencent: '#006EFF',
  aws: '#FF9900',
  huawei: '#CF0A2C',
  azure: '#0078D4',
};

/** @deprecated 请改用 providerHex + style */
export const providerColors: Record<string, string> = {
  aliyun: 'bg-orange-500',
  tencent: 'bg-blue-500',
  aws: 'bg-amber-500',
  huawei: 'bg-red-500',
  azure: 'bg-sky-500',
};

export function ProviderDot({ provider, className = 'w-2 h-2' }: { provider: string; className?: string }) {
  return (
    <span
      className={`rounded-full shrink-0 ${className}`}
      style={{ backgroundColor: providerHex[provider] || 'var(--surface-active)' }}
    />
  );
}

export function formatCurrency(n: number) {
  return `¥${n.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`;
}

export function StatCard({ icon, label, value, trend, trendLabel, alert }: {
  icon: ReactNode;
  label: string;
  value: string;
  trend?: number;
  trendLabel?: string;
  alert?: boolean;
}) {
  return (
    <div className={alert ? 'dg-alert-banner' : 'rounded-lg border border-[var(--border-default)] bg-[var(--surface-raised)]/50 p-4'}>
      <div className="flex items-center justify-between mb-2">
        <span className="dg-text-secondary text-sm">{label}</span>
        <span className={alert ? 'dg-text-yellow' : 'dg-text-muted'}>{icon}</span>
      </div>
      <div className={`text-2xl font-bold ${alert ? 'dg-text-yellow' : 'text-[var(--text-primary)]'}`}>{value}</div>
      {trendLabel && (
        <div className="flex items-center gap-1 mt-1 text-xs">
          {trend !== undefined && trend > 0 && <TrendingUp className="h-3 w-3 dg-text-red" />}
          {trend !== undefined && trend < 0 && <TrendingDown className="h-3 w-3 dg-text-green" />}
          <span className="dg-text-muted">{trendLabel}</span>
        </div>
      )}
    </div>
  );
}

export function TrendChart({ data }: { data: { date: string; cost: number }[] }) {
  if (data.length === 0) {
    return <p className="text-sm dg-text-muted py-8 text-center"> {i18n.t('aiops.assistantNoData')} </p>;
  }
  const max = Math.max(...data.map((d) => d.cost), 1);
  const recent = data.slice(-30);

  return (
    <div>
      <div className="flex items-end gap-0.5 h-40">
        {recent.map((d, i) => {
          const h = Math.max((d.cost / max) * 100, 2);
          return (
            <div
              key={i}
              className="flex-1 group relative"
              style={{ height: '100%' }}
            >
              <div
                className="absolute bottom-0 w-full rounded-t-sm transition-opacity group-hover:opacity-90"
                style={{
                  height: `${h}%`,
                  background: `linear-gradient(to top, color-mix(in srgb, var(--brand) 55%, transparent), color-mix(in srgb, var(--brand) 85%, transparent))`,
                }}
              />
              <div className="absolute bottom-full left-1/2 -translate-x-1/2 mb-2 hidden group-hover:block whitespace-nowrap text-xs bg-[var(--surface-inset)] text-[var(--text-primary)] px-2 py-1 rounded border border-[var(--border-default)] z-10">
                {d.date}: {formatCurrency(d.cost)}
              </div>
            </div>
          );
        })}
      </div>
      <div className="flex justify-between mt-2 text-xs dg-text-muted">
        <span>{recent[0]?.date}</span>
        <span>{recent[recent.length - 1]?.date}</span>
      </div>
    </div>
  );
}