import {
  Box,
  Card,
  Chip,
  Typography,
  LinearProgress,
  Stack,
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableRow,
  Alert,
  CircularProgress,
} from '@mui/material'
import { useQuery } from '@tanstack/react-query'
import { propertyService } from '../../services/propertyService'

interface MetricCard {
  label: string
  value: string
  color: string
  note: string
}

const HEALTH_METRICS: MetricCard[] = [
  { label: 'Extraktionsgenauigkeit', value: '94%', color: '#1a7a4a', note: 'Ø letzte 30 Tage' },
  { label: 'Konfidenz-Ø', value: '73%', color: '#d97706', note: 'Alle Objekte' },
  { label: 'Validierungsrate', value: '88%', color: '#1a7a4a', note: 'Menschliche Bestätigung' },
  { label: 'Fehlerrate', value: '2.1%', color: '#1a7a4a', note: 'Kritische Fehler' },
]

interface AIDecision {
  timestamp: string
  type: string
  confidence: string
  result: string
  impact: string
}

const RECENT_DECISIONS: AIDecision[] = [
  {
    timestamp: '15.05.2025 14:32',
    type: 'Bedarfsextraktion',
    confidence: '91%',
    result: 'Kriterien extrahiert',
    impact: 'Suche ausgelöst',
  },
  {
    timestamp: '15.05.2025 11:15',
    type: 'Match-Scoring',
    confidence: '88%',
    result: '3 Matches berechnet',
    impact: 'Review ausgelöst',
  },
  {
    timestamp: '14.05.2025 16:40',
    type: 'Signal-Erkennung',
    confidence: '72%',
    result: 'Expansion erkannt',
    impact: 'Signal erstellt',
  },
  {
    timestamp: '14.05.2025 09:00',
    type: 'Datenqualitätsprüfung',
    confidence: '95%',
    result: '2 Warnungen erkannt',
    impact: 'Meldung erstellt',
  },
  {
    timestamp: '13.05.2025 15:22',
    type: 'Match-Scoring',
    confidence: '84%',
    result: '2 Matches berechnet',
    impact: 'Review ausgelöst',
  },
  {
    timestamp: '12.05.2025 10:11',
    type: 'Signal-Erkennung',
    confidence: '65%',
    result: 'Möglicher Auszug erkannt',
    impact: 'Signal erstellt',
  },
]

function getConfidenceBadge(pct: string) {
  const n = parseInt(pct)
  const color = n >= 85 ? '#1a7a4a' : n >= 70 ? '#d97706' : '#c0392b'
  return (
    <Chip
      label={pct}
      size="small"
      sx={{ bgcolor: color, color: 'white', fontWeight: 700, fontSize: 11 }}
    />
  )
}

export default function AIMonitoring() {
  const { data: propResp, isLoading } = useQuery({
    queryKey: ['properties'],
    queryFn: () => propertyService.getAll(),
  })

  const properties = propResp?.data ?? []

  const highConf = properties.filter(p => p.confidenceScore > 0.85).length
  const midConf = properties.filter(p => p.confidenceScore >= 0.65 && p.confidenceScore <= 0.85).length
  const lowConf = properties.filter(p => p.confidenceScore < 0.65).length
  const total = properties.length || 1

  return (
    <Box>
      {/* Page Header */}
      <Box
        sx={{
          bgcolor: 'white',
          borderBottom: '1px solid #e2e8f0',
          px: 3,
          py: 2,
          display: 'flex',
          alignItems: 'center',
          gap: 2,
        }}
      >
        <Box sx={{ flex: 1 }}>
          <Box sx={{ display: 'flex', alignItems: 'center', gap: 1.5 }}>
            <Typography variant="h5" sx={{ fontWeight: 700 }} color="text.primary">
              AI Monitoring
            </Typography>
            <Chip
              label="Live"
              size="small"
              sx={{
                bgcolor: '#1a7a4a',
                color: 'white',
                fontWeight: 700,
                fontSize: 11,
                animation: 'pulse 2s ease-in-out infinite',
                '@keyframes pulse': {
                  '0%, 100%': { opacity: 1 },
                  '50%': { opacity: 0.6 },
                },
              }}
            />
          </Box>
          <Typography variant="body2" color="text.secondary">
            AI-Layer Gesundheit und Entscheidungsqualität
          </Typography>
        </Box>
      </Box>

      <Box sx={{ px: 3, py: 3 }}>
        {/* Health Metrics */}
        <Box className="grid grid-cols-4 gap-4" sx={{ mb: 3 }}>
          {HEALTH_METRICS.map(m => (
            <Card key={m.label} sx={{ p: 2.5 }}>
              <Typography variant="overline" color="text.secondary" sx={{ lineHeight: 1.4, display: 'block' }}>
                {m.label}
              </Typography>
              <Typography variant="h3" sx={{ fontWeight: 800, color: m.color }}>
                {m.value}
              </Typography>
              <Typography variant="caption" color="text.secondary">
                {m.note}
              </Typography>
            </Card>
          ))}
        </Box>

        <Box className="grid grid-cols-2 gap-4" sx={{ mb: 3 }}>
          {/* Confidence Distribution */}
          <Card sx={{ p: 2.5 }}>
            <Typography variant="subtitle1" sx={{ fontWeight: 600, mb: 2 }}>
              Konfidenzverteilung
            </Typography>

            {isLoading ? (
              <Box sx={{ display: 'flex', justifyContent: 'center', py: 4 }}>
                <CircularProgress size={32} />
              </Box>
            ) : (
              <Stack spacing={2}>
                <Box>
                  <Box sx={{ display: 'flex', justifyContent: 'space-between', mb: 0.5 }}>
                    <Typography variant="body2" sx={{ fontWeight: 500 }}>Hoch (&gt;85%)</Typography>
                    <Typography variant="body2" color="text.secondary">{highConf} Objekte</Typography>
                  </Box>
                  <LinearProgress
                    variant="determinate"
                    value={(highConf / total) * 100}
                    color="success"
                    sx={{ height: 10, borderRadius: 5 }}
                  />
                </Box>
                <Box>
                  <Box sx={{ display: 'flex', justifyContent: 'space-between', mb: 0.5 }}>
                    <Typography variant="body2" sx={{ fontWeight: 500 }}>Mittel (65–85%)</Typography>
                    <Typography variant="body2" color="text.secondary">{midConf} Objekte</Typography>
                  </Box>
                  <LinearProgress
                    variant="determinate"
                    value={(midConf / total) * 100}
                    color="warning"
                    sx={{ height: 10, borderRadius: 5 }}
                  />
                </Box>
                <Box>
                  <Box sx={{ display: 'flex', justifyContent: 'space-between', mb: 0.5 }}>
                    <Typography variant="body2" sx={{ fontWeight: 500 }}>Niedrig (&lt;65%)</Typography>
                    <Typography variant="body2" color="text.secondary">{lowConf} Objekte</Typography>
                  </Box>
                  <LinearProgress
                    variant="determinate"
                    value={(lowConf / total) * 100}
                    color="error"
                    sx={{ height: 10, borderRadius: 5 }}
                  />
                </Box>
              </Stack>
            )}
          </Card>

          {/* Anomaly Alerts */}
          <Card sx={{ p: 2.5 }}>
            <Typography variant="subtitle1" sx={{ fontWeight: 600, mb: 2 }}>
              Anomalien
            </Typography>
            <Stack spacing={1.5}>
              <Alert severity="warning">
                Mietpreisangaben für prop-004 weichen von Marktdurchschnitt ab (±31%). Manuelle Prüfung empfohlen.
              </Alert>
              <Alert severity="success">
                Keine kritischen Anomalien erkannt. System läuft stabil.
              </Alert>
            </Stack>
          </Card>
        </Box>

        {/* Recent AI Decisions */}
        <Card>
          <Box sx={{ px: 2.5, py: 2, borderBottom: '1px solid #f1f5f9' }}>
            <Typography variant="subtitle1" sx={{ fontWeight: 600 }}>
              Letzte KI-Entscheidungen
            </Typography>
          </Box>
          <Table>
            <TableHead>
              <TableRow sx={{ bgcolor: '#f8fafc' }}>
                <TableCell sx={{ fontSize: 12, fontWeight: 600, color: '#64748b' }}>Zeitpunkt</TableCell>
                <TableCell sx={{ fontSize: 12, fontWeight: 600, color: '#64748b' }}>Entscheidungstyp</TableCell>
                <TableCell sx={{ fontSize: 12, fontWeight: 600, color: '#64748b' }}>Konfidenz</TableCell>
                <TableCell sx={{ fontSize: 12, fontWeight: 600, color: '#64748b' }}>Ergebnis</TableCell>
                <TableCell sx={{ fontSize: 12, fontWeight: 600, color: '#64748b' }}>Einfluss</TableCell>
              </TableRow>
            </TableHead>
            <TableBody>
              {RECENT_DECISIONS.map((d, i) => (
                <TableRow key={i} hover>
                  <TableCell>
                    <Typography variant="caption" color="text.secondary">{d.timestamp}</Typography>
                  </TableCell>
                  <TableCell>
                    <Typography variant="body2" sx={{ fontWeight: 500 }}>{d.type}</Typography>
                  </TableCell>
                  <TableCell>{getConfidenceBadge(d.confidence)}</TableCell>
                  <TableCell>
                    <Typography variant="body2">{d.result}</Typography>
                  </TableCell>
                  <TableCell>
                    <Typography variant="body2" color="text.secondary">{d.impact}</Typography>
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </Card>
      </Box>
    </Box>
  )
}