import { Box, Button, Chip, IconButton, Tooltip, Typography } from '@mui/material'
import { X, AlertTriangle, BookmarkCheck, ExternalLink, Kanban } from 'lucide-react'
import { useNavigate } from 'react-router'
import { usePipelineItems } from '../../hooks/usePipeline'
import { usePipelineStore } from '../../stores/pipelineStore'
import { RESULT_TYPE_META } from '../../lib/ds'
import { matchScoreHex } from '../../lib/utils'
import type { UnifiedMatchResult } from '../../domain/unifiedResult'

interface Props {
  item: UnifiedMatchResult
  onRemove: () => void
}

export function CompareColumnHeader({ item, onRemove }: Props) {
  const navigate = useNavigate()
  const { data: pipelineItems = [] } = usePipelineItems()
  const { openSavedDialog } = usePipelineStore()

  const meta = RESULT_TYPE_META[item.resultType] ?? { label: item.resultType, color: '#64748b' }
  const prop = item.resultType !== 'FUTURE_AVAILABILITY' ? (item as any).property : null
  const sig  = item.resultType === 'FUTURE_AVAILABILITY' ? (item as any).signal  : null

  const title        = prop?.title ?? sig?.companyName ?? sig?.locationHint ?? '–'
  const subtitle     = prop?.location?.city ?? sig?.locationHint ?? '–'
  const district     = prop?.location?.district
  const availability = prop?.availabilityDate ?? (sig ? `~${sig.timeHorizonMonths} Monate` : null)
  const confidence   = Math.round(item.match.confidenceLevel * 100)
  const source       = prop?.sourceLabel ?? sig?.source?.type ?? '–'

  const isInPipeline = pipelineItems.some(
    pi => pi.id === item.matchId || (prop?.id && pi.propertyId === prop.id)
  )

  function handleSave() {
    if (isInPipeline) return
    openSavedDialog({
      resultId: item.matchId,
      resultType: item.resultType,
      title,
      location: prop?.location?.city ?? sig?.locationHint,
      matchScore: item.matchScore,
      propertyId: prop?.id,
      propertyAddress: prop ? `${title}, ${subtitle}${district ? `, ${district}` : ''}` : undefined,
      areaLabel: prop?.areaSqm ? `${prop.areaSqm.toLocaleString('de-CH')} m²` : undefined,
      rentLabel: prop?.rentPricePerSqm ? `CHF ${prop.rentPricePerSqm}/m²/Jahr` : undefined,
      availabilityLabel: prop?.availabilityDate ?? undefined,
    })
  }

  return (
    <Box sx={{ p: 0.5 }}>

      {/* Row 1: type chip + remove */}
      <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 1 }}>
        <Chip label={meta.label} size="small" sx={{ bgcolor: meta.color, color: 'white', fontWeight: 600, fontSize: 10 }} />
        <Tooltip title="Aus Vergleich entfernen">
          <IconButton size="small" onClick={onRemove} sx={{ p: 0.375, color: '#94a3b8', '&:hover': { color: '#c0392b' } }}>
            <X size={15} />
          </IconButton>
        </Tooltip>
      </Box>

      {/* Row 2: title (clickable) */}
      <Typography
        variant="subtitle1"
        sx={{
          fontWeight: 700, lineHeight: 1.3, mb: 0.25,
          cursor: 'pointer',
          '&:hover': { color: '#1e3a5f' },
        }}
        onClick={() => navigate(`/demand/results/${item.matchId}`)}
      >
        {title}
      </Typography>
      <Typography variant="caption" color="text.secondary" sx={{ display: 'block', mb: 1.25 }}>
        {subtitle}{district ? `, ${district}` : ''}
      </Typography>

      {/* Row 3: score */}
      <Box sx={{ display: 'flex', alignItems: 'baseline', gap: 0.5, mb: 1 }}>
        <Typography variant="h4" sx={{ fontWeight: 800, color: matchScoreHex(item.matchScore), lineHeight: 1 }}>
          {item.matchScore}
        </Typography>
        <Typography variant="caption" color="text.secondary">/100</Typography>
      </Box>

      {/* Row 4: meta chips */}
      <Box sx={{ display: 'flex', flexWrap: 'wrap', gap: 0.5, mb: 1.25 }}>
        <Tooltip title="Konfidenz">
          <Chip
            label={`${confidence}% Konfidenz`}
            size="small"
            icon={confidence < 60 ? <AlertTriangle size={10} /> : undefined}
            sx={{
              fontSize: 10,
              bgcolor: confidence < 60 ? '#fef3c7' : '#f0fdf4',
              color: confidence < 60 ? '#92400e' : '#166534',
            }}
          />
        </Tooltip>
        {source && source !== '–' && (
          <Chip label={source} size="small" sx={{ fontSize: 10 }} />
        )}
        {availability && (
          <Chip label={availability} size="small" sx={{ fontSize: 10 }} />
        )}
      </Box>

      {item.resultType === 'FUTURE_AVAILABILITY' && sig && (
        <Box sx={{ mb: 1.25, p: 0.75, bgcolor: '#faf5ff', borderRadius: 1, border: '1px solid #e9d5ff' }}>
          <Typography variant="caption" sx={{ color: '#7c3aed', fontWeight: 600, display: 'block' }}>
            Probabilistisches Signal
          </Typography>
          <Typography variant="caption" color="text.secondary">
            {Math.round(sig.probability * 100)}% Wahrscheinlichkeit
          </Typography>
        </Box>
      )}

      {/* Row 5: action buttons */}
      <Box sx={{ display: 'flex', gap: 0.75, pt: 1, borderTop: '1px solid #f1f5f9' }}>
        <Button
          size="small"
          variant="outlined"
          startIcon={<ExternalLink size={12} />}
          onClick={() => navigate(`/demand/results/${item.matchId}`)}
          sx={{ flex: 1, textTransform: 'none', fontSize: '0.72rem', py: 0.5 }}
        >
          Details
        </Button>
        {isInPipeline ? (
          <Button
            size="small"
            variant="outlined"
            startIcon={<BookmarkCheck size={12} />}
            disabled
            sx={{ flex: 1, textTransform: 'none', fontSize: '0.72rem', py: 0.5, color: '#1a7a4a', borderColor: '#86efac' }}
          >
            In Pipeline
          </Button>
        ) : (
          <Button
            size="small"
            variant="contained"
            startIcon={<Kanban size={12} />}
            onClick={handleSave}
            sx={{ flex: 1, textTransform: 'none', fontSize: '0.72rem', py: 0.5 }}
          >
            Merken
          </Button>
        )}
      </Box>

    </Box>
  )
}