import { memo, useState } from 'react'
import { useNavigate } from 'react-router'
import {
  Alert,
  Box,
  Button,
  Chip,
  CircularProgress,
  Dialog,
  DialogActions,
  DialogContent,
  DialogTitle,
  Drawer,
  IconButton,
  Switch,
  Tooltip,
  Typography,
} from '@mui/material'
import { ArrowLeft, Plus, Trash2 } from 'lucide-react'
import { useProperties, useUpdateProperty, useRemoveProperty } from '../../hooks/useProperties'
import { useMatchesByProperty } from '../../hooks/useMatches'
import { useLatentNeedById } from '../../hooks/useLatentNeeds'
import { PropertyDetailView } from '../../components/supply'
import { PublicNeedDetail, OfferWizard } from '../../components/anfragencenter'
import { NEED_TO_LATENT_NEED } from '../../lib/needToLatentNeedMap'
import type { Property } from '../../domain/property'
import type { Match } from '../../domain/match'

const ASSET_LABELS: Record<string, string> = {
  OFFICE: 'Büro',
  RETAIL: 'Einzelhandel',
  LIGHT_INDUSTRIAL: 'Gewerbe',
  LOGISTICS: 'Logistik',
  PRODUCTION: 'Produktion',
  MIXED: 'Gemischt',
}

const GRID_COLS = '2fr 1fr 80px 100px 110px 120px 80px 48px'

function formatDate(iso?: string) {
  if (!iso) return '–'
  return new Date(iso).toLocaleDateString('de-CH', { day: '2-digit', month: '2-digit', year: 'numeric' })
}

function matchColor(score: number): string {
  if (score >= 80) return '#1a7a4a'
  if (score >= 60) return '#d97706'
  return '#dc2626'
}

// ─── Suchabo dialog ────────────────────────────────────────────────────────

function MatchListItem({
  match,
  onSelect,
}: {
  match: Match
  onSelect: (needId: string) => void
}) {
  const latentNeedId = NEED_TO_LATENT_NEED[match.needId] ?? null
  const { data: latentNeed } = useLatentNeedById(latentNeedId)
  const companyName = latentNeed?.tenantCompany ?? match.needId

  return (
    <Box
      sx={{
        display: 'flex',
        alignItems: 'center',
        justifyContent: 'space-between',
        px: 2, py: 1.5,
        border: '1px solid #e2e8f0',
        borderRadius: 1.5,
        bgcolor: 'white',
        gap: 1,
      }}
    >
      <Box sx={{ minWidth: 0 }}>
        <Typography variant="body2" sx={{ fontWeight: 600, color: '#0f172a', overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
          {companyName}
        </Typography>
        {latentNeed && (
          <Typography variant="caption" sx={{ color: '#64748b' }}>
            {latentNeed.desiredLocation}
          </Typography>
        )}
      </Box>
      <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, flexShrink: 0 }}>
        <Chip
          label={`${match.matchScore}%`}
          size="small"
          sx={{
            height: 20,
            fontSize: '0.65rem',
            fontWeight: 700,
            bgcolor: `${matchColor(match.matchScore)}18`,
            color: matchColor(match.matchScore),
          }}
        />
        {latentNeedId ? (
          <Button
            size="small"
            variant="contained"
            onClick={() => onSelect(match.needId)}
            sx={{
              textTransform: 'none',
              fontSize: '0.75rem',
              bgcolor: '#152642',
              '&:hover': { bgcolor: '#162d4a' },
            }}
          >
            Anschreiben
          </Button>
        ) : (
          <Tooltip title="Kein öffentliches Suchabo verknüpft">
            <span>
              <Button size="small" disabled sx={{ textTransform: 'none', fontSize: '0.75rem' }}>
                Anschreiben
              </Button>
            </span>
          </Tooltip>
        )}
      </Box>
    </Box>
  )
}

interface SuchaboDialogProps {
  propertyId: string
  matches: Match[]
  onClose: () => void
}

function SuchaboDialogContent({ matches }: SuchaboDialogProps) {
  const [selectedNeedId, setSelectedNeedId] = useState<string | null>(
    matches.length === 1 ? matches[0].needId : null,
  )
  const latentNeedId = selectedNeedId ? (NEED_TO_LATENT_NEED[selectedNeedId] ?? null) : null
  const { data: latentNeed, isLoading } = useLatentNeedById(latentNeedId)

  const showList = !selectedNeedId

  if (showList) {
    return (
      <Box sx={{ p: 2.5, display: 'flex', flexDirection: 'column', gap: 1 }}>
        {matches.map(m => (
          <MatchListItem key={m.id} match={m} onSelect={setSelectedNeedId} />
        ))}
      </Box>
    )
  }

  if (isLoading) {
    return (
      <Box sx={{ display: 'flex', justifyContent: 'center', py: 6 }}>
        <CircularProgress size={28} />
      </Box>
    )
  }

  if (!latentNeed) {
    return (
      <Box sx={{ p: 3, textAlign: 'center' }}>
        <Typography variant="body2" color="text.secondary">Suchabo nicht gefunden.</Typography>
      </Box>
    )
  }

  return (
    <Box>
      {matches.length > 1 && (
        <Box sx={{ px: 2, pt: 1.5 }}>
          <Button
            startIcon={<ArrowLeft size={14} />}
            size="small"
            onClick={() => setSelectedNeedId(null)}
            sx={{ textTransform: 'none', color: '#64748b', fontWeight: 500 }}
          >
            Alle Suchabos
          </Button>
        </Box>
      )}
      <PublicNeedDetail need={latentNeed} />
    </Box>
  )
}

// ─── Row ───────────────────────────────────────────────────────────────────

interface RowProps {
  p: Property
  isLast: boolean
  onDetail: (id: string) => void
  onToggleStatus: (p: Property) => void
  onDelete: (p: Property) => void
  onChipClick: (propertyId: string, matches: Match[]) => void
  updatePending: boolean
  removePending: boolean
}

const ListingRow = memo(function ListingRow({
  p, isLast, onDetail, onToggleStatus, onDelete, onChipClick, updatePending, removePending,
}: RowProps) {
  const { data: matches = [] } = useMatchesByProperty(p.id)
  const topScore = matches.length > 0 ? Math.max(...matches.map(m => m.matchScore)) : 0

  return (
    <Box
      onClick={() => onDetail(p.id)}
      sx={{
        display: 'grid',
        gridTemplateColumns: GRID_COLS,
        px: 2, py: 1.25,
        alignItems: 'center',
        borderBottom: isLast ? 'none' : '1px solid #f1f5f9',
        cursor: 'pointer',
        '&:hover': { bgcolor: '#f8fafc' },
        transition: 'background 0.1s',
      }}
    >
      {/* Title + type */}
      <Box>
        <Typography variant="body2" sx={{ fontWeight: 500, color: '#0f172a', lineHeight: 1.3 }}>
          {p.title}
        </Typography>
        <Chip
          label={ASSET_LABELS[p.assetType] ?? p.assetType}
          size="small"
          sx={{ height: 16, fontSize: '0.6rem', mt: 0.25, bgcolor: '#f1f5f9', color: '#475569' }}
        />
      </Box>

      {/* City */}
      <Typography variant="body2" sx={{ color: '#374151' }}>
        {p.location.city}
      </Typography>

      {/* Area */}
      <Typography variant="body2" sx={{ color: '#374151' }}>
        {p.areaSqm.toLocaleString('de-CH')} m²
      </Typography>

      {/* Rent */}
      <Typography variant="body2" sx={{ color: '#374151' }}>
        CHF {p.rentPricePerSqm.toLocaleString('de-CH')}
      </Typography>

      {/* Match count */}
      <Box onClick={e => e.stopPropagation()}>
        {matches.length > 0 ? (
          <Tooltip title="Suchabos anzeigen und anschreiben">
            <Chip
              label={`${matches.length} Suchabo${matches.length !== 1 ? 's' : ''}`}
              size="small"
              onClick={() => onChipClick(p.id, matches)}
              sx={{
                height: 20,
                fontSize: '0.65rem',
                fontWeight: 600,
                bgcolor: `${matchColor(topScore)}18`,
                color: matchColor(topScore),
                cursor: 'pointer',
                '&:hover': { opacity: 0.85 },
              }}
            />
          </Tooltip>
        ) : (
          <Typography variant="caption" sx={{ color: '#cbd5e1' }}>—</Typography>
        )}
      </Box>

      {/* Created */}
      <Typography variant="caption" sx={{ color: '#64748b' }}>
        {formatDate(p.createdAt)}
      </Typography>

      {/* Status toggle */}
      <Box onClick={e => e.stopPropagation()}>
        <Tooltip title={p.status === 'ACTIVE' ? 'Deaktivieren' : 'Aktivieren'}>
          <Switch
            size="small"
            checked={p.status === 'ACTIVE'}
            onChange={() => onToggleStatus(p)}
            disabled={updatePending}
            sx={{ '& .MuiSwitch-thumb': { width: 14, height: 14 } }}
          />
        </Tooltip>
      </Box>

      {/* Delete */}
      <Box onClick={e => e.stopPropagation()}>
        <Tooltip title="Inserat löschen">
          <IconButton
            size="small"
            onClick={() => onDelete(p)}
            disabled={removePending}
            sx={{ color: '#94a3b8', '&:hover': { color: '#ef4444' } }}
          >
            <Trash2 size={15} />
          </IconButton>
        </Tooltip>
      </Box>
    </Box>
  )
})

// ─── Page ─────────────────────────────────────────────────────────────────

export default function MyListings() {
  const navigate = useNavigate()

  const { data: listings = [], isLoading } = useProperties({ sourceType: 'DIRECT' })
  const updateProperty = useUpdateProperty()
  const removeProperty = useRemoveProperty()

  const [detailId, setDetailId] = useState<string | null>(null)
  const [confirmDelete, setConfirmDelete] = useState<Property | null>(null)
  const [actionError, setActionError] = useState<string | null>(null)
  const [suchaboDialog, setSuchaboDialog] = useState<{
    propertyId: string
    matches: Match[]
  } | null>(null)

  function handleToggleStatus(p: Property) {
    const next = p.status === 'ACTIVE' ? 'INACTIVE' : 'ACTIVE'
    updateProperty.mutate(
      { id: p.id, input: { status: next } },
      { onError: () => setActionError('Status konnte nicht geändert werden.') },
    )
  }

  function handleDelete(p: Property) {
    removeProperty.mutate(p.id, {
      onSuccess: () => setConfirmDelete(null),
      onError: () => {
        setActionError('Inserat konnte nicht gelöscht werden.')
        setConfirmDelete(null)
      },
    })
  }

  return (
    <Box sx={{ display: 'flex', flexDirection: 'column', height: '100%', overflow: 'hidden' }}>
      {/* Header */}
      <Box sx={{ bgcolor: 'white', borderBottom: '1px solid #e8e7e4', px: 3, py: 2.5, flexShrink: 0, display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
        <Box>
          <Typography sx={{ fontWeight: 700, fontSize: '1.125rem', lineHeight: 1.3, color: '#0f172a' }}>Inserate</Typography>
          <Typography variant="body2" color="text.secondary">
            Direkt erstellte Inserate — unabhängig vom Portfolio
          </Typography>
        </Box>
        <Button
          variant="contained"
          startIcon={<Plus size={16} />}
          onClick={() => navigate('/supply/new-listing')}
          sx={{ bgcolor: '#152642', '&:hover': { bgcolor: '#162d4a' }, textTransform: 'none' }}
        >
          Neues Inserat
        </Button>
      </Box>

      <Box sx={{ flex: 1, overflowY: 'auto', px: 3, py: 3, maxWidth: 1040, width: '100%', mx: 'auto', boxSizing: 'border-box' }}>

      {actionError && (
        <Alert severity="error" sx={{ mb: 2 }} onClose={() => setActionError(null)}>
          {actionError}
        </Alert>
      )}

      {isLoading ? (
        <Box sx={{ display: 'flex', justifyContent: 'center', py: 8 }}>
          <CircularProgress />
        </Box>
      ) : listings.length === 0 ? (
        <Box sx={{ textAlign: 'center', py: 10, color: 'text.secondary' }}>
          <Typography variant="h6" sx={{ mb: 1, fontWeight: 500 }}>Noch keine Inserate</Typography>
          <Typography variant="body2" sx={{ mb: 3 }}>
            Erstellen Sie Ihr erstes direktes Inserat — ohne vollständiges Objekt im Portfolio.
          </Typography>
          <Button
            variant="outlined"
            startIcon={<Plus size={15} />}
            onClick={() => navigate('/supply/new-listing')}
            sx={{ textTransform: 'none' }}
          >
            Erstes Inserat erstellen
          </Button>
        </Box>
      ) : (
        <Box sx={{ border: '1px solid #e2e8f0', borderRadius: 1.5, overflow: 'hidden' }}>
          {/* Header */}
          <Box sx={{
            display: 'grid',
            gridTemplateColumns: GRID_COLS,
            px: 2, py: 1,
            bgcolor: '#f8fafc',
            borderBottom: '1px solid #e2e8f0',
          }}>
            {['Inserat', 'Ort', 'Fläche', 'Preis/m²/J', 'Suchabos', 'Erstellt', 'Aktiv', ''].map(h => (
              <Typography key={h} variant="caption" sx={{ fontWeight: 600, color: '#64748b', fontSize: '0.65rem', textTransform: 'uppercase' }}>
                {h}
              </Typography>
            ))}
          </Box>

          {listings.map((p, i) => (
            <ListingRow
              key={p.id}
              p={p}
              isLast={i === listings.length - 1}
              onDetail={setDetailId}
              onToggleStatus={handleToggleStatus}
              onDelete={setConfirmDelete}
              onChipClick={(pid, m) => setSuchaboDialog({ propertyId: pid, matches: m })}
              updatePending={updateProperty.isPending}
              removePending={removeProperty.isPending}
            />
          ))}
        </Box>
      )}

      </Box>{/* end scroll container */}

      {/* Detail / edit drawer */}
      <Drawer
        anchor="right"
        open={!!detailId}
        onClose={() => setDetailId(null)}
        slotProps={{ paper: { sx: { width: { xs: '100%', sm: '90vw', md: 480, lg: 540, xl: 560 } } } }}
      >
        {detailId && (
          <PropertyDetailView propertyId={detailId} onClose={() => setDetailId(null)} hideTabs={['Matchability', 'Marktsignale']} />
        )}
      </Drawer>

      {/* Suchabo dialog */}
      <Dialog
        open={!!suchaboDialog}
        onClose={() => setSuchaboDialog(null)}
        maxWidth="sm"
        fullWidth
        slotProps={{ paper: { sx: { maxHeight: '85vh' } } }}
      >
        <DialogTitle sx={{ fontWeight: 700, fontSize: '1rem', pb: 1 }}>
          Suchabos
          {suchaboDialog && (
            <Typography variant="body2" color="text.secondary" sx={{ fontWeight: 400 }}>
              {suchaboDialog.matches.length} Suchabo{suchaboDialog.matches.length !== 1 ? 's' : ''} matchen dieses Inserat
            </Typography>
          )}
        </DialogTitle>
        {suchaboDialog && (
          <SuchaboDialogContent
            propertyId={suchaboDialog.propertyId}
            matches={suchaboDialog.matches}
            onClose={() => setSuchaboDialog(null)}
          />
        )}
      </Dialog>

      {/* Delete confirmation */}
      <Dialog open={!!confirmDelete} onClose={() => setConfirmDelete(null)} maxWidth="xs" fullWidth>
        <DialogTitle>Inserat löschen?</DialogTitle>
        <DialogContent>
          <Typography variant="body2">
            <strong>{confirmDelete?.title}</strong> wird unwiderruflich gelöscht.
          </Typography>
        </DialogContent>
        <DialogActions>
          <Button onClick={() => setConfirmDelete(null)} sx={{ textTransform: 'none' }}>
            Abbrechen
          </Button>
          <Button
            color="error"
            variant="contained"
            onClick={() => confirmDelete && handleDelete(confirmDelete)}
            sx={{ textTransform: 'none' }}
          >
            Löschen
          </Button>
        </DialogActions>
      </Dialog>

      {/* OfferWizard — triggered by PublicNeedDetail's "Angebot erstellen" button */}
      <OfferWizard />
    </Box>
  )
}
