import { memo, useCallback, useRef } from 'react'
import { Box, Typography } from '@mui/material'
import type { ExposeLead } from '../../domain/exposeLead'
import type { Property } from '../../domain/property'
import { ObjectDeepLink } from '../team'
import { LeadWorkspace } from './LeadWorkspace'
import { DS_SLATE, DS_TEXT } from '../../lib/ds'

export const LEAD_COLS = '110px 1.2fr 1.4fr 1fr 1.4fr'

const COLUMN_LABELS = ['Datum', 'Möglicher Interessent', 'Kontaktdaten', 'Raum', 'Objektempfehlung']

interface RowProps {
  lead: ExposeLead
  properties: Property[]
  selected: boolean
  onSelect: (id: string, row: HTMLElement | null) => void
}

const LeadRow = memo(function LeadRow({ lead, properties, selected, onSelect }: RowProps) {
  const ref = useRef<HTMLDivElement>(null)

  const recommended = lead.propertyIds
    .map(id => properties.find(p => p.id === id))
    .filter((p): p is Property => Boolean(p))

  return (
    <Box
      ref={ref}
      onClick={() => onSelect(lead.id, ref.current)}
      sx={{
        display: 'grid',
        gridTemplateColumns: LEAD_COLS,
        alignItems: 'flex-start',
        gap: 1,
        px: 2, py: 1.5,
        borderBottom: '1px solid #f1f5f9',
        bgcolor: selected ? '#f8fafc' : 'white',
        cursor: 'pointer',
        '&:hover': { bgcolor: DS_SLATE[50] },
        transition: 'background-color 0.1s',
      }}
    >
      <Typography variant="caption" sx={{ color: DS_TEXT.secondary, pt: 0.25 }}>
        {new Date(lead.receivedAt).toLocaleDateString('de-CH')}
      </Typography>

      <Typography variant="body2" sx={{ fontWeight: 600, color: DS_TEXT.primary }}>
        {lead.prospect}
      </Typography>

      <Box sx={{ minWidth: 0 }}>
        {lead.contacts.length === 0 ? (
          <Typography variant="caption" sx={{ color: DS_TEXT.disabled }}>–</Typography>
        ) : (
          lead.contacts.map(c => (
            <Typography
              key={c}
              variant="caption"
              sx={{ display: 'block', color: DS_TEXT.secondary, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}
            >
              {c}
            </Typography>
          ))
        )}
      </Box>

      <Typography variant="body2" sx={{ color: DS_TEXT.secondary }}>
        {lead.locationHint}
      </Typography>

      {/* Mehrere Objekte je Lead — jedes verlinkt nach «Meine Objekte». */}
      <Box sx={{ minWidth: 0 }} onClick={e => e.stopPropagation()}>
        {recommended.length === 0 ? (
          <Typography variant="caption" sx={{ color: DS_TEXT.disabled }}>–</Typography>
        ) : (
          recommended.map(p => (
            <ObjectDeepLink key={p.id} propertyId={p.id} label={p.title} />
          ))
        )}
      </Box>
    </Box>
  )
})

interface Props {
  leads: ExposeLead[]
  properties: Property[]
  selectedId: string | null
  onSelect: (id: string, row: HTMLElement | null) => void
  /** Arbeitsbereich nur bei aktiven Leads — Archiviertes wird nicht bearbeitet. */
  withWorkspace: boolean
  emptyText: string
}

/**
 * Livias Leadliste im Grunddesign der Ferdi-Liste (Runde 4, §8.3).
 *
 * Der Arbeitsbereich öffnet sich zwischen der gewählten Zeile und den übrigen
 * Leads — nicht in einem Drawer. Das hält den Bezug zum Lead sichtbar, während
 * gearbeitet wird.
 */
export function LeadTable({ leads, properties, selectedId, onSelect, withWorkspace, emptyText }: Props) {
  const handleSelect = useCallback(
    (id: string, row: HTMLElement | null) => onSelect(id, row),
    [onSelect],
  )

  if (leads.length === 0) {
    return (
      <Box sx={{ py: 6, textAlign: 'center' }}>
        <Typography variant="body2" sx={{ color: DS_TEXT.muted }}>{emptyText}</Typography>
      </Box>
    )
  }

  return (
    <Box sx={{ border: '1px solid #e2e8f0', borderRadius: 1.5, overflow: 'hidden' }}>
      <Box
        sx={{
          display: 'grid',
          gridTemplateColumns: LEAD_COLS,
          gap: 1,
          px: 2, py: 1,
          bgcolor: DS_SLATE[50],
          borderBottom: '1px solid #e2e8f0',
        }}
      >
        {COLUMN_LABELS.map(h => (
          <Typography key={h} variant="caption" sx={{ fontWeight: 600, color: DS_TEXT.secondary, fontSize: '0.7rem' }}>
            {h}
          </Typography>
        ))}
      </Box>

      {leads.map(lead => (
        <Box key={lead.id}>
          <LeadRow
            lead={lead}
            properties={properties}
            selected={lead.id === selectedId}
            onSelect={handleSelect}
          />
          {withWorkspace && lead.id === selectedId && <LeadWorkspace lead={lead} />}
        </Box>
      ))}
    </Box>
  )
}