import { useStandardQuery } from '@szl-holdings/api-client-react';
import { Badge } from '@szl-holdings/shared-ui/ui/badge';
import { Card, CardContent, CardHeader, CardTitle } from '@szl-holdings/shared-ui/ui/card';
import {
  AlertTriangle,
  BarChart3,
  Brain,
  CheckCircle,
  Info,
  Sparkles,
  Target,
  TrendingUp,
  Wrench,
} from 'lucide-react';
import {
  Area,
  AreaChart,
  CartesianGrid,
  Line,
  ResponsiveContainer,
  Tooltip,
  XAxis,
  YAxis,
} from 'recharts';
import { dataProvider } from '@/data/data-provider';

const severityColors: Record<string, string> = {
  Critical: 'bg-red-500/10 text-red-400 border-red-500/20',
  Warning: 'bg-amber-500/10 text-amber-400 border-amber-500/20',
  Info: 'bg-blue-500/10 text-blue-400 border-blue-500/20',
};

const riskColors: Record<string, string> = {
  High: 'bg-red-500/10 text-red-400 border-red-500/20',
  Medium: 'bg-amber-500/10 text-amber-400 border-amber-500/20',
  Low: 'bg-emerald-500/10 text-emerald-400 border-emerald-500/20',
};

export default function AppliedIntelligencePage() {
  const { data: briefings = [] } = useStandardQuery({
    queryKey: ['ai-briefings'],
    queryFn: () => dataProvider.getAIBriefings(),
  });
  const { data: predictive = [] } = useStandardQuery({
    queryKey: ['predictive-maint'],
    queryFn: () => dataProvider.getPredictiveMaintenanceItems(),
  });
  const { data: forecasts = [] } = useStandardQuery({
    queryKey: ['forecasts'],
    queryFn: () => dataProvider.getForecastModules(),
  });

  return (
    <div className="p-6 space-y-6">
      <div className="animate-fade-in-up">
        <h1 className="font-display text-2xl font-bold flex items-center gap-2">
          <Brain className="w-6 h-6 text-primary" /> Applied Intelligence
        </h1>
        <p className="text-sm text-muted-foreground mt-1">
          Executive briefings, predictive maintenance, and forecasting with confidence intervals
        </p>
      </div>

      <div className="animate-fade-in-up stagger-1">
        <div className="flex items-center gap-2 mb-4">
          <Sparkles className="w-5 h-5 text-primary" />
          <h2 className="font-display text-lg font-semibold">Executive AI Briefings</h2>
        </div>
        <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
          {briefings.map((b) => (
            <Card
              key={b.id}
              className={`bg-card border-border hover:border-primary/20 transition-all ${b.severity === 'Critical' ? 'ring-1 ring-red-500/20' : ''}`}
            >
              <CardHeader className="pb-2">
                <div className="flex items-start justify-between">
                  <div className="flex items-center gap-2">
                    {b.severity === 'Critical' ? (
                      <AlertTriangle className="w-4 h-4 text-red-400" />
                    ) : b.severity === 'Warning' ? (
                      <AlertTriangle className="w-4 h-4 text-amber-400" />
                    ) : (
                      <Info className="w-4 h-4 text-blue-400" />
                    )}
                    <CardTitle className="font-display text-sm">{b.title}</CardTitle>
                  </div>
                  <div className="flex items-center gap-2">
                    <Badge
                      variant="outline"
                      className={`text-xs ${b.severity ? severityColors[b.severity] : ''}`}
                    >
                      {b.severity}
                    </Badge>
                    <Badge
                      variant="outline"
                      className="text-xs bg-primary/10 text-primary border-primary/20"
                    >
                      <Target className="w-3 h-3 mr-1" />
                      {b.confidence}%
                    </Badge>
                  </div>
                </div>
              </CardHeader>
              <CardContent className="space-y-3">
                <p className="text-sm text-muted-foreground">{b.summary}</p>
                <div className="p-3 rounded-lg bg-muted/50 border border-border">
                  <p className="text-xs text-muted-foreground/80 leading-relaxed">{b.details}</p>
                </div>
                <div>
                  <p className="text-xs font-semibold text-muted-foreground mb-1.5">Action Items</p>
                  <ul className="space-y-1">
                    {(b.actionItems ?? []).map((item: string, i: number) => (
                      <li key={i} className="flex items-start gap-2 text-xs text-muted-foreground">
                        <CheckCircle className="w-3 h-3 mt-0.5 text-primary shrink-0" />
                        {item}
                      </li>
                    ))}
                  </ul>
                </div>
                <div className="flex flex-wrap gap-1 pt-2 border-t border-border">
                  {(b.affectedVessels ?? []).map((v: string) => (
                    <Badge
                      key={v}
                      variant="outline"
                      className="text-[10px] bg-muted text-muted-foreground"
                    >
                      {v}
                    </Badge>
                  ))}
                </div>
                <div className="text-[10px] text-muted-foreground/50">
                  Generated: {b.generatedAt ? new Date(b.generatedAt).toLocaleString() : '—'} ·
                  Category: {b.category}
                </div>
              </CardContent>
            </Card>
          ))}
        </div>
      </div>

      <Card className="bg-card border-border animate-fade-in-up stagger-2">
        <CardHeader className="pb-2">
          <CardTitle className="font-display text-base flex items-center gap-2">
            <Wrench className="w-5 h-5 text-amber-400" /> Predictive Maintenance Summaries
          </CardTitle>
        </CardHeader>
        <CardContent>
          <div className="space-y-3">
            {predictive
              .sort((a, b) => (b.failureProbability ?? 0) - (a.failureProbability ?? 0))
              .map((p) => (
                <div
                  key={p.id}
                  className={`p-4 rounded-lg border transition-all ${p.riskLevel === 'High' ? 'border-red-500/20 bg-red-500/5' : 'border-border bg-background/50'} hover:border-primary/20`}
                >
                  <div className="flex items-start justify-between">
                    <div>
                      <div className="flex items-center gap-2 mb-1">
                        <p className="text-sm font-semibold">{p.component}</p>
                        <Badge
                          variant="outline"
                          className={`text-xs ${p.riskLevel ? riskColors[p.riskLevel] : ''}`}
                        >
                          {p.riskLevel} Risk
                        </Badge>
                      </div>
                      <p className="text-xs text-muted-foreground">{p.vesselName}</p>
                    </div>
                    <div className="text-right">
                      <p
                        className={`text-lg font-bold ${(p.failureProbability ?? 0) >= 60 ? 'text-red-400' : (p.failureProbability ?? 0) >= 40 ? 'text-amber-400' : 'text-emerald-400'}`}
                      >
                        {p.failureProbability ?? 0}%
                      </p>
                      <p className="text-[10px] text-muted-foreground">failure prob.</p>
                    </div>
                  </div>
                  <p className="text-xs text-muted-foreground mt-2">{p.recommendedAction}</p>
                  <div className="flex items-center gap-4 mt-2 text-xs text-muted-foreground">
                    <span>
                      Predicted:{' '}
                      {p.predictedFailureDate
                        ? new Date(p.predictedFailureDate).toLocaleDateString()
                        : '—'}
                    </span>
                    <span>Est. Cost: ${(p.estimatedCost ?? 0).toLocaleString()}</span>
                    <Badge
                      variant="outline"
                      className="text-[10px] bg-primary/10 text-primary border-primary/20"
                    >
                      <Target className="w-3 h-3 mr-1" />
                      {p.confidence}% confidence
                    </Badge>
                  </div>
                </div>
              ))}
          </div>
        </CardContent>
      </Card>

      <div className="animate-fade-in-up stagger-3">
        <div className="flex items-center gap-2 mb-4">
          <BarChart3 className="w-5 h-5 text-primary" />
          <h2 className="font-display text-lg font-semibold">Forecast Modules</h2>
        </div>
        <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
          {forecasts.map((f) => (
            <Card
              key={f.id}
              className="bg-card border-border hover:border-primary/20 transition-all"
            >
              <CardHeader className="pb-2">
                <div className="flex items-center justify-between">
                  <CardTitle className="font-display text-sm">{f.title}</CardTitle>
                  <div className="flex items-center gap-2">
                    <Badge
                      variant="outline"
                      className={`text-xs ${f.trend === 'up' ? 'bg-emerald-500/10 text-emerald-400 border-emerald-500/20' : 'bg-blue-500/10 text-blue-400 border-blue-500/20'}`}
                    >
                      {f.trend === 'up' ? (
                        <TrendingUp className="w-3 h-3 mr-1" />
                      ) : (
                        <TrendingUp className="w-3 h-3 mr-1 rotate-180" />
                      )}
                      {f.trend}
                    </Badge>
                    <Badge
                      variant="outline"
                      className="text-[10px] bg-primary/10 text-primary border-primary/20"
                    >
                      {f.confidence}%
                    </Badge>
                  </div>
                </div>
              </CardHeader>
              <CardContent>
                <div className="flex items-center justify-between mb-3">
                  <div>
                    <p className="text-xs text-muted-foreground">Current</p>
                    <p className="text-lg font-bold">
                      {typeof f.currentValue === 'number' && f.currentValue > 1000
                        ? f.currentValue.toLocaleString()
                        : f.currentValue}{' '}
                      <span className="text-xs text-muted-foreground">{f.metric}</span>
                    </p>
                  </div>
                  <div className="text-right">
                    <p className="text-xs text-muted-foreground">
                      Forecast ({(f.forecastDate ?? '').slice(5)})
                    </p>
                    <p
                      className={`text-lg font-bold ${f.trend === 'up' ? 'text-emerald-400' : 'text-blue-400'}`}
                    >
                      {typeof f.forecastValue === 'number' && f.forecastValue > 1000
                        ? f.forecastValue.toLocaleString()
                        : f.forecastValue}{' '}
                      <span className="text-xs text-muted-foreground">{f.metric}</span>
                    </p>
                  </div>
                </div>
                <ResponsiveContainer width="100%" height={180}>
                  <AreaChart data={f.dataPoints}>
                    <CartesianGrid strokeDasharray="3 3" stroke="rgba(255,255,255,0.05)" />
                    <XAxis
                      dataKey="date"
                      stroke="rgba(255,255,255,0.4)"
                      fontSize={10}
                      tickFormatter={(v) => v.slice(5)}
                    />
                    <YAxis stroke="rgba(255,255,255,0.4)" fontSize={10} />
                    <Tooltip
                      contentStyle={{
                        backgroundColor: 'hsl(var(--card))',
                        border: '1px solid hsl(var(--border))',
                        borderRadius: 8,
                        fontSize: 12,
                      }}
                    />
                    <Area
                      type="monotone"
                      dataKey="value"
                      name="Actual"
                      stroke="hsl(var(--primary))"
                      fill="hsl(var(--primary))"
                      fillOpacity={0.1}
                      strokeWidth={2}
                    />
                    <Line
                      type="monotone"
                      dataKey="forecast"
                      name="Forecast"
                      stroke="#22c55e"
                      strokeWidth={2}
                      strokeDasharray="5 5"
                      dot={{ fill: '#22c55e', r: 3 }}
                      connectNulls={false}
                    />
                  </AreaChart>
                </ResponsiveContainer>
              </CardContent>
            </Card>
          ))}
        </div>
      </div>
    </div>
  );
}