import { Box, Chip, Divider, Typography } from '@mui/material'
import { Building2, MapPin, Ruler, Calendar } from 'lucide-react'
import type { InquiryPreparationReportDraft, ReportObjectFieldKey } from '../../domain/inquiryReport'
import type { Property } from '../../domain/property'
import type { Inquiry } from '../../domain/inquiry'
import { DS_TEXT, DS_BG, DS_SURFACE, DS_BORDER } from '../../lib/ds'

interface Props {
  draft: InquiryPreparationReportDraft
  inquiry: Inquiry
  properties: Property[]
}

const FIELD_LABELS: Partial<Record<ReportObjectFieldKey, string>> = {
  areaSqm: 'Fläche',
  rentPricePerSqm: 'Mietpreis',
  availabilityDate: 'Verfügbar ab',
  leaseTerm: 'Mietlaufzeit',
  breakoutOption: 'Breakout-Option',
  breakoutOptionDate: 'Breakout Zeitpunkt',
  currentTenant: 'Aktueller Mieter',
  propertyNumber: 'Objektnummer',
  assetType: 'Asset Type',
  floor: 'Stockwerk',
  parking: 'Parkplätze',
  fitOut: 'Ausbaugrad',
  isBarrierFree: 'Barrierefrei',
  ceilingHeightM: 'Raumhöhe',
  floorLoad: 'Bodenlast',
  loadingDocksCount: 'Anlieferung',
  goodsLift: 'Warenaufzug',
  passengerLift: 'Personenaufzug',
  powerSupplyKva: 'Stromanschluss',
  hasServerRoom: 'Serverraum',
  internet: 'Internet',
  deliveryAccess: 'Zufahrt',
  publicTransportScore: 'ÖV-Anbindung',
  prestigeScore: 'Prestige',
  visibilityScore: 'Sichtbarkeit',
  footfallScore: 'Passantenfrequenz',
  commuterAccessScore: 'Pendlererreichbarkeit',
  talentAccessScore: 'Talent Access',
  esgScore: 'ESG',
  flexibilityScore: 'Flexibilität',
  expansionPotentialScore: 'Expansionspotenzial',
  taxEnvironmentScore: 'Steuerumfeld',
  microLocation: 'Mikrostandort',
  competitionEnvironment: 'Konkurrenzumfeld',
  infrastructure: 'Infrastruktur',
  marketSignals: 'Marktsignale',
  negotiationHints: 'Verhandlungshinweise',
  missingData: 'Datenlücken',
  dataQuality: 'Datenqualität',
  description: 'Beschreibung',
  units: 'Stockwerkstruktur',
}

function getFieldValue(property: Property, key: ReportObjectFieldKey): string | null {
  switch (key) {
    case 'areaSqm': return property.areaSqm ? `${property.areaSqm.toLocaleString('de-CH')} m²` : null
    case 'rentPricePerSqm': return property.rentPricePerSqm ? `CHF ${property.rentPricePerSqm}/m²/Jahr` : null
    case 'availabilityDate': return property.availabilityDate ? new Date(property.availabilityDate).toLocaleDateString('de-CH') : null
    case 'leaseTerm': return property.leaseTerm ?? null
    case 'breakoutOption': return property.breakoutOption != null ? (property.breakoutOption ? 'Ja' : 'Nein') : null
    case 'currentTenant': return property.currentTenant ?? null
    case 'propertyNumber': return property.propertyNumber ?? null
    case 'assetType': return property.assetType ?? null
    case 'floor': return property.floorLevel != null ? String(property.floorLevel) : null
    case 'parking': return property.softFactors?.parkingSpots != null ? `${property.softFactors.parkingSpots} Plätze` : null
    case 'ceilingHeightM': return property.hardFacts?.ceilingHeightM != null ? `${property.hardFacts.ceilingHeightM} m` : null
    case 'loadingDocksCount': return property.hardFacts?.loadingDocksCount != null ? String(property.hardFacts.loadingDocksCount) : null
    case 'powerSupplyKva': return property.hardFacts?.powerSupplyKva != null ? `${property.hardFacts.powerSupplyKva} kVA` : null
    case 'hasServerRoom': return property.hardFacts?.hasServerRoom != null ? (property.hardFacts.hasServerRoom ? 'Ja' : 'Nein') : null
    case 'isBarrierFree': return property.hardFacts?.isBarrierFree != null ? (property.hardFacts.isBarrierFree ? 'Ja' : 'Nein') : null
    case 'fitOut': return property.hardFacts?.fitOut ?? null
    case 'publicTransportScore': return property.softFactors?.publicTransportMinutes != null ? `${property.softFactors.publicTransportMinutes} Min.` : null
    case 'prestigeScore': return property.softFactors?.prestige != null ? `${property.softFactors.prestige}/100` : null
    case 'visibilityScore': return property.softFactors?.visibilityScore != null ? `${property.softFactors.visibilityScore}/100` : null
    case 'description': return property.description ?? null
    default: return null
  }
}

export function LatentInquiryReportPreview({ draft, inquiry, properties }: Props) {
  const editableByField = Object.fromEntries(draft.editableFields.map(f => [f.id, f.value]))
  const selectedProps = draft.selectedPropertyIds
    .map(id => properties.find(p => p.id === id))
    .filter((p): p is Property => !!p)

  return (
    <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0, fontFamily: 'Georgia, serif' }}>

      {/* Page 1 — Need Summary */}
      <Box
        sx={{
          bgcolor: 'white',
          p: 4,
          minHeight: 600,
          boxShadow: '0 2px 12px rgba(0,0,0,0.1)',
          borderRadius: 1,
          mb: 2,
        }}
      >
        <Box sx={{ borderBottom: `3px solid ${DS_TEXT.brand}`, pb: 2, mb: 3 }}>
          <Typography variant="h5" sx={{ fontWeight: 700, color: DS_TEXT.brand, fontFamily: 'inherit' }}>
            Objektvorschlag
          </Typography>
          <Typography variant="body2" sx={{ color: DS_TEXT.muted, mt: 0.5 }}>
            Wincasa AG · {new Date().toLocaleDateString('de-CH')}
          </Typography>
        </Box>

        {editableByField['intro'] && (
          <Typography variant="body2" sx={{ whiteSpace: 'pre-wrap', lineHeight: 1.8, mb: 3, color: DS_TEXT.primary }}>
            {editableByField['intro']}
          </Typography>
        )}

        <Box sx={{ bgcolor: DS_BG.page, border: `1px solid ${DS_BORDER.default}`, borderRadius: 1, p: 2, mb: 3 }}>
          <Typography variant="body2" sx={{ fontWeight: 700, color: DS_TEXT.primary, mb: 1 }}>
            Ihre Anfrage
          </Typography>
          <Typography variant="body2" sx={{ color: DS_TEXT.primary, mb: 0.5 }}>
            <strong>Kontakt:</strong> {inquiry.tenantName}{inquiry.tenantCompany ? ` · ${inquiry.tenantCompany}` : ''}
          </Typography>
          <Typography variant="body2" sx={{ color: DS_TEXT.primary }}>
            <strong>Betreff:</strong> {inquiry.subject}
          </Typography>
        </Box>

        {editableByField['highlights'] && (
          <>
            <Typography variant="body2" sx={{ fontWeight: 700, color: DS_TEXT.primary, mb: 1 }}>
              Warum diese Objekte passen
            </Typography>
            <Typography variant="body2" sx={{ whiteSpace: 'pre-wrap', lineHeight: 1.8, color: DS_TEXT.primary, mb: 3 }}>
              {editableByField['highlights']}
            </Typography>
          </>
        )}

        <Box sx={{ display: 'flex', gap: 1, flexWrap: 'wrap' }}>
          {selectedProps.map(p => (
            <Chip
              key={p.id}
              label={p.title}
              size="small"
              icon={<Building2 size={12} />}
              sx={{ bgcolor: DS_SURFACE.indigo.bg, color: DS_TEXT.brand, fontWeight: 600 }}
            />
          ))}
        </Box>
      </Box>

      {/* Page 2+ — One section per property */}
      {selectedProps.map((property, idx) => {
        const selection = draft.fieldSelections.find(fs => fs.propertyId === property.id)
        const optionalFields = selection?.selectedOptionalFields ?? []
        const image = property.images?.[0]

        return (
          <Box key={property.id}>
            <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, mb: 1 }}>
              <Divider sx={{ flex: 1 }} />
              <Typography variant="caption" sx={{ color: DS_TEXT.disabled, fontSize: '0.7rem', whiteSpace: 'nowrap' }}>
                Objekt {idx + 1} von {selectedProps.length}
              </Typography>
              <Divider sx={{ flex: 1 }} />
            </Box>

            <Box
              sx={{
                bgcolor: 'white',
                p: 3,
                boxShadow: '0 2px 12px rgba(0,0,0,0.1)',
                borderRadius: 1,
                mb: 2,
              }}
            >
              <Box sx={{ display: 'flex', gap: 2, mb: 2.5 }}>
                {/* Map placeholder */}
                <Box
                  sx={{
                    width: 160,
                    height: 120,
                    borderRadius: 1,
                    overflow: 'hidden',
                    bgcolor: DS_BORDER.default,
                    backgroundImage: property.mapImageUrl ? `url(${property.mapImageUrl})` : 'none',
                    backgroundSize: 'cover',
                    backgroundPosition: 'center',
                    flexShrink: 0,
                    display: 'flex',
                    alignItems: 'center',
                    justifyContent: 'center',
                  }}
                >
                  {!property.mapImageUrl && <MapPin size={28} color={DS_TEXT.disabled} />}
                </Box>
                {/* Property photo */}
                <Box
                  sx={{
                    flex: 1,
                    height: 120,
                    borderRadius: 1,
                    overflow: 'hidden',
                    bgcolor: DS_BORDER.default,
                    backgroundImage: image ? `url(${image})` : 'none',
                    backgroundSize: 'cover',
                    backgroundPosition: 'center',
                    display: 'flex',
                    alignItems: 'center',
                    justifyContent: 'center',
                  }}
                >
                  {!image && <Building2 size={28} color={DS_TEXT.disabled} />}
                </Box>
              </Box>

              <Typography variant="h6" sx={{ fontWeight: 700, color: DS_TEXT.brand, mb: 0.5, fontFamily: 'inherit' }}>
                {property.title}
              </Typography>
              <Box sx={{ display: 'flex', gap: 2, mb: 2 }}>
                <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.5, color: DS_TEXT.muted }}>
                  <MapPin size={13} />
                  <Typography variant="caption">{property.location.city}{property.location.district ? `, ${property.location.district}` : ''}</Typography>
                </Box>
                <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.5, color: DS_TEXT.muted }}>
                  <Ruler size={13} />
                  <Typography variant="caption">{property.areaSqm.toLocaleString('de-CH')} m²</Typography>
                </Box>
                <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.5, color: DS_TEXT.muted }}>
                  <Calendar size={13} />
                  <Typography variant="caption">{new Date(property.availabilityDate).toLocaleDateString('de-CH')}</Typography>
                </Box>
              </Box>

              {optionalFields.length > 0 && (
                <Box
                  sx={{
                    display: 'grid',
                    gridTemplateColumns: '1fr 1fr',
                    gap: 0.75,
                    bgcolor: DS_BG.page,
                    borderRadius: 1,
                    p: 1.5,
                  }}
                >
                  {optionalFields.map(key => {
                    const val = getFieldValue(property, key)
                    if (!val) return null
                    return (
                      <Box key={key}>
                        <Typography variant="caption" sx={{ color: DS_TEXT.muted, fontSize: '0.68rem', display: 'block' }}>
                          {FIELD_LABELS[key] ?? key}
                        </Typography>
                        <Typography variant="caption" sx={{ fontWeight: 600, color: DS_TEXT.primary, fontSize: '0.78rem' }}>
                          {val}
                        </Typography>
                      </Box>
                    )
                  })}
                </Box>
              )}
            </Box>
          </Box>
        )
      })}

      {editableByField['next_steps'] && (
        <Box sx={{ bgcolor: 'white', p: 3, boxShadow: '0 2px 12px rgba(0,0,0,0.1)', borderRadius: 1 }}>
          <Typography variant="body2" sx={{ fontWeight: 700, color: DS_TEXT.primary, mb: 1 }}>
            Nächste Schritte
          </Typography>
          <Typography variant="body2" sx={{ whiteSpace: 'pre-wrap', lineHeight: 1.8, color: DS_TEXT.primary }}>
            {editableByField['next_steps']}
          </Typography>
        </Box>
      )}
    </Box>
  )
}
