import { useEffect } from 'react';
import { useAnalysisStore } from '@/stores/analysisStore';
import { ErrorBanner } from '@/components/ErrorBanner';
import {
  Lightbulb,
  AlertTriangle,
  CheckCircle,
  Info,
  XCircle,
  TrendingUp,
  TrendingDown,
  Clock,
} from 'lucide-react';

const TYPE_CONFIG = {
  warning: {
    icon: AlertTriangle,
    bg: 'bg-warning-light',
    border: 'border-warning',
    iconColor: 'text-warning',
    badge: 'bg-warning text-white',
  },
  danger: {
    icon: XCircle,
    bg: 'bg-danger-light',
    border: 'border-danger',
    iconColor: 'text-danger',
    badge: 'bg-danger text-white',
  },
  success: {
    icon: CheckCircle,
    bg: 'bg-success-light',
    border: 'border-success',
    iconColor: 'text-success',
    badge: 'bg-success text-white',
  },
  info: {
    icon: Info,
    bg: 'bg-primary-muted',
    border: 'border-primary',
    iconColor: 'text-primary',
    badge: 'bg-primary text-white',
  },
};

export function Insights() {
  const { insights, isLoading, error, clearError, fetchInsights } = useAnalysisStore();

  useEffect(() => {
    fetchInsights();
  }, []);

  const stats = insights
    ? [
        {
          label: '总洞察数',
          value: insights.total_insights,
          icon: Lightbulb,
          color: 'text-primary',
          bg: 'bg-primary-muted',
        },
        {
          label: '预警',
          value: insights.warning_count + ((insights as any).danger_count || 0),
          icon: AlertTriangle,
          color: 'text-warning',
          bg: 'bg-warning-light',
        },
        {
          label: '正常',
          value: insights.success_count,
          icon: CheckCircle,
          color: 'text-success',
          bg: 'bg-success-light',
        },
        {
          label: '信息',
          value: insights.info_count,
          icon: Info,
          color: 'text-primary',
          bg: 'bg-primary-muted',
        },
      ]
    : [];

  return (
    <div>
      {error && (
        <ErrorBanner
          error={error}
          onRetry={() => { clearError(); fetchInsights(); }}
          onDismiss={clearError}
        />
      )}
      <div className="mb-5">
        <h1 className="font-display text-[18px] font-semibold mb-1 flex items-center gap-2">
          <Lightbulb className="w-5 h-5 text-primary" />
          智能洞察
        </h1>
        <p className="text-[12px] text-text-muted">
          基于数据分析自动生成的风险洞察与建议
        </p>
      </div>

      {isLoading && (
        <div className="mb-4 text-center py-8 bg-bg-card rounded-lg border border-border">
          <span className="text-text-secondary">数据加载中...</span>
        </div>
      )}

      {insights && (
        <div className="grid grid-cols-4 gap-4 mb-4">
          {stats.map((stat) => (
            <div key={stat.label} className="card p-4">
              <div className="flex items-center gap-2 mb-2">
                <div className={`w-8 h-8 rounded-lg ${stat.bg} flex items-center justify-center`}>
                  <stat.icon className={`w-4 h-4 ${stat.color}`} />
                </div>
                <span className="text-[11px] font-medium text-text-muted uppercase tracking-wide">
                  {stat.label}
                </span>
              </div>
              <div className="font-display text-[26px] font-bold text-text-primary">
                {stat.value}
              </div>
            </div>
          ))}
        </div>
      )}

      {insights && (
        <div className="grid grid-cols-2 gap-4">
          {insights.cards.map((card) => {
            const config = TYPE_CONFIG[card.type];
            const Icon = config.icon;
            return (
              <div
                key={card.id}
                className={`card p-4 border-l-4 ${config.border} hover:shadow-md transition-shadow`}
              >
                <div className="flex items-start justify-between mb-3">
                  <div className="flex items-center gap-2">
                    <div className={`w-8 h-8 rounded-lg ${config.bg} flex items-center justify-center`}>
                      <Icon className={`w-4 h-4 ${config.iconColor}`} />
                    </div>
                    <div>
                      <h3 className="text-[14px] font-semibold text-text-primary">
                        {card.title}
                      </h3>
                      <span className="text-[11px] text-text-muted flex items-center gap-1">
                        <Clock className="w-3 h-3" />
                        {card.timestamp}
                      </span>
                    </div>
                  </div>
                  <span className={`text-[10px] font-semibold px-2 py-0.5 rounded ${config.badge}`}>
                    {card.type === 'warning' ? '预警' : card.type === 'danger' ? '紧急' : card.type === 'success' ? '正常' : '信息'}
                  </span>
                </div>

                <p className="text-[13px] text-text-secondary leading-relaxed mb-3">
                  {card.description}
                </p>

                {card.metric && card.metricValue && (
                  <div className="flex items-center gap-2 pt-3 border-t border-border">
                    <span className="text-[12px] text-text-muted">{card.metric}:</span>
                    <span className={`text-[14px] font-bold flex items-center gap-1 ${
                      card.type === 'warning' || card.type === 'danger'
                        ? 'text-danger'
                        : card.type === 'success'
                        ? 'text-success'
                        : 'text-primary'
                    }`}>
                      {card.metricValue.includes('+') ? (
                        <TrendingUp className="w-3.5 h-3.5" />
                      ) : card.metricValue.includes('-') ? (
                        <TrendingDown className="w-3.5 h-3.5" />
                      ) : null}
                      {card.metricValue}
                    </span>
                  </div>
                )}
              </div>
            );
          })}
        </div>
      )}

      {!insights && !isLoading && (
        <div className="card p-8 text-center">
          <Lightbulb className="w-12 h-12 text-text-muted mx-auto mb-3" />
          <p className="text-text-secondary">暂无洞察数据</p>
        </div>
      )}
    </div>
  );
}