import { useNavigate } from 'react-router'
import { Box, Button, Card, Chip, IconButton, Tooltip, Typography } from '@mui/material'
import { useDraggable } from '@dnd-kit/core'
import { CSS } from '@dnd-kit/utilities'
import { ExternalLink, MapPin, MessageSquare, Send, MessagesSquare } from 'lucide-react'
import { MatchScoreDisplay } from '../match-card/MatchScoreDisplay'
import { HeatBadge } from '../shared'
import type { PipelineItem } from '../../domain/pipeline'
import { STAGES, RESULT_TYPE_META } from './pipelineConstants'
import { detailPath } from './pipelineUtils'
import { useInquiryStore } from '../../stores/inquiryStore'

// ── DraggableCard ─────────────────────────────────────────────────────────────

export function DraggableCard({
  item,
  isSelected,
  onSelect,
  isDragOverlay = false,
  onChatClick,
}: {
  item: PipelineItem
  isSelected: boolean
  onSelect: (item: PipelineItem) => void
  isDragOverlay?: boolean
  onChatClick?: (e: React.MouseEvent) => void
}) {
  const navigate = useNavigate()
  const openInquiryDialog = useInquiryStore(s => s.openInquiryDialog)
  const { attributes, listeners, setNodeRef, transform, isDragging } = useDraggable({ id: item.id })
  const stageConfig = STAGES.find(s => s.key === item.stage) ?? STAGES[0]
  const path = detailPath(item)

  const style = !isDragOverlay ? {
    transform: CSS.Translate.toString(transform),
    opacity: isDragging ? 0.35 : 1,
    transition: isDragging ? undefined : 'opacity 0.15s ease',
  } : undefined

  return (
    <Card
      ref={!isDragOverlay ? setNodeRef : undefined}
      style={style}
      elevation={isDragOverlay ? 6 : 0}
      onClick={() => !isDragging && onSelect(item)}
      sx={{
        p: 1.5,
        border: isSelected && !isDragOverlay
          ? '2px solid #1e3a5f'
          : isDragOverlay
            ? '2px solid transparent'
            : '2px solid transparent',
        cursor: isDragOverlay ? 'grabbing' : 'grab',
        bgcolor: isDragOverlay ? 'white' : isSelected ? '#eff6ff' : 'white',
        boxShadow: isDragOverlay ? '0 8px 24px rgba(0,0,0,0.18)' : '0 1px 3px rgba(0,0,0,0.08)',
        '&:hover': isDragOverlay ? {} : {
          boxShadow: '0 2px 8px rgba(0,0,0,0.12)',
          borderColor: isSelected ? '#152642' : '#bfdbfe',
        },
        transition: isDragOverlay ? undefined : 'box-shadow 0.15s, border-color 0.15s',
        userSelect: 'none',
        rotate: isDragOverlay ? '2deg' : undefined,
      }}
      {...(isDragOverlay ? {} : { ...attributes, ...listeners })}
    >
      {/* Row 1: Score + type chip + chat icon */}
      <Box sx={{ display: 'flex', alignItems: 'flex-start', justifyContent: 'space-between', gap: 0.5, mb: 0.75 }}>
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, flex: 1, minWidth: 0, flexWrap: 'wrap' }}>
          <MatchScoreDisplay score={item.matchScore} size="sm" />
          <HeatBadge propertyId={item.propertyId} size="sm" />
          <Chip
            size="small"
            label={RESULT_TYPE_META[item.resultType]?.label ?? item.resultType}
            sx={{ bgcolor: RESULT_TYPE_META[item.resultType]?.color ?? '#475569', color: 'white', fontSize: 10, height: 20, fontWeight: 600 }}
          />
          <Chip
            size="small"
            label={stageConfig.label}
            sx={{ bgcolor: stageConfig.bgColor, color: stageConfig.color, fontSize: 10, height: 20, fontWeight: 600 }}
          />
        </Box>
        {!isDragOverlay && (
          <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.125, flexShrink: 0 }}>
            {item.inquiryId && onChatClick && (
              <Tooltip title="Chat öffnen">
                <IconButton size="small" onClick={onChatClick} sx={{ p: 0.25, color: '#152642', '&:hover': { bgcolor: '#eff6ff' } }}>
                  <MessageSquare size={13} />
                </IconButton>
              </Tooltip>
            )}
            {path && (
              <Tooltip title="Match öffnen">
                <IconButton
                  size="small"
                  onClick={(e) => { e.stopPropagation(); navigate(path) }}
                  sx={{ p: 0.25, color: '#94a3b8', '&:hover': { color: '#152642', bgcolor: '#eff6ff' } }}
                >
                  <ExternalLink size={13} />
                </IconButton>
              </Tooltip>
            )}
          </Box>
        )}
      </Box>

      {/* Row 2: Title */}
      <Typography variant="body2" sx={{ fontWeight: 700, lineHeight: 1.3, mb: 0.25 }} noWrap>
        {item.title}
      </Typography>

      {/* Row 3: Location */}
      <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.5, mb: 0.5 }}>
        <MapPin size={11} color="#64748b" />
        <Typography variant="caption" color="text.secondary" sx={{ fontSize: '0.72rem' }} noWrap>
          {item.propertyAddress ?? item.location}
        </Typography>
      </Box>

      {/* Row 4: Area + rent */}
      {(item.areaLabel || item.rentLabel) && (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, flexWrap: 'wrap' }}>
          {item.areaLabel && (
            <Typography variant="caption" sx={{ color: '#475569', fontSize: '0.72rem' }}>{item.areaLabel}</Typography>
          )}
          {item.areaLabel && item.rentLabel && (
            <Box sx={{ width: 3, height: 3, borderRadius: '50%', bgcolor: '#cbd5e1' }} />
          )}
          {item.rentLabel && (
            <Typography variant="caption" sx={{ color: '#475569', fontSize: '0.72rem' }}>{item.rentLabel}</Typography>
          )}
        </Box>
      )}

      {/* Row 5: Notes preview */}
      {item.notes && (
        <Typography variant="caption" sx={{ fontStyle: 'italic', color: '#94a3b8', mt: 0.5, display: 'block', fontSize: '0.7rem' }} noWrap>
          {item.notes}
        </Typography>
      )}

      {/* Row 6: Anfrage / Konversation */}
      {!isDragOverlay && (
        <Box sx={{ mt: 1, pt: 0.75, borderTop: '1px solid #f1f5f9' }}>
          {item.stage !== 'SAVED' || item.inquiryId ? (
            <Button
              size="small"
              variant="outlined"
              startIcon={<MessagesSquare size={11} />}
              fullWidth
              onMouseDown={e => e.stopPropagation()}
              onClick={e => {
                e.stopPropagation()
                navigate(`/demand/anfragen?inquiry=${item.inquiryId}`)
              }}
              sx={{
                fontSize: '0.7rem', py: 0.5, textTransform: 'none', fontWeight: 600,
                borderColor: '#152642', color: '#152642',
                '&:hover': { bgcolor: '#eff6ff', borderColor: '#152642' },
              }}
            >
              Zur Konversation
            </Button>
          ) : (
            <Button
              size="small"
              variant="contained"
              startIcon={<Send size={11} />}
              fullWidth
              onMouseDown={e => e.stopPropagation()}
              onClick={e => {
                e.stopPropagation()
                openInquiryDialog({
                  propertyTitle: item.title,
                  location: item.propertyAddress ?? item.location,
                  areaLabel: item.areaLabel,
                  rentLabel: item.rentLabel,
                  matchScore: item.matchScore,
                  pipelineItemId: item.id,
                })
              }}
              sx={{
                fontSize: '0.7rem', py: 0.5, textTransform: 'none', fontWeight: 600,
                bgcolor: '#152642', '&:hover': { bgcolor: '#162d4a' },
              }}
            >
              Anfrage senden
            </Button>
          )}
        </Box>
      )}
    </Card>
  )
}