import { Alert, Box, Button, CircularProgress, Divider, Typography } from '@mui/material'
import { ArrowLeft } from 'lucide-react'
import { useLocation, useNavigate } from 'react-router'
import { useNewListingForm } from '../../hooks/useNewListingForm'
import {
  AiAssistCard,
  AreaDetailsSection,
  AddressSection,
  SoftFactorsSection,
  TechnicalDetailsSection,
  ImageUrlSection,
  FloorPlanUrlSection,
  ContactSection,
  CreatedScreen,
} from '../../components/new-listing'
import { DS_TEXT } from '../../lib/ds'
import type { LocationState } from './newListingConstants'

export default function NewListing() {
  const navigate = useNavigate()
  const { state } = useLocation() as { state: LocationState | null }
  const pre = state?.prefill ?? {}

  const form = useNewListingForm(pre)

  if (form.created) {
    return (
      <CreatedScreen
        onViewListings={() => navigate('/supply/my-listings')}
        onCreateAnother={form.resetForm}
      />
    )
  }

  return (
    <Box sx={{ maxWidth: 760, mx: 'auto', px: 3, py: 4 }}>
      <Box sx={{ display: 'flex', alignItems: 'center', gap: 1.5, mb: 3 }}>
        <Button
          variant="text"
          size="small"
          startIcon={<ArrowLeft size={16} />}
          onClick={() => navigate(-1)}
          sx={{ color: DS_TEXT.muted, textTransform: 'none', px: 0 }}
        >
          Zurück
        </Button>
      </Box>

      <Typography sx={{ fontWeight: 700, fontSize: '1.125rem', lineHeight: 1.3, color: '#0f172a', mb: 0.5 }}>Neues Inserat erstellen</Typography>
      <Typography variant="body2" color="text.secondary" sx={{ mb: 3 }}>
        {form.isPrefilled
          ? `Einheit ${pre.unitLabel ?? ''} aus Portfolio vorausgefüllt — Angaben prüfen und veröffentlichen.`
          : 'Fläche direkt inserieren — ohne vollständiges Objekt im Portfolio.'}
      </Typography>

      <AiAssistCard
        text={form.aiText}
        onTextChange={form.setAiText}
        onParse={form.handleAiParse}
        parsing={form.aiParsing}
        applied={form.aiApplied}
      />

      <AreaDetailsSection
        assetType={form.assetType}       onAssetTypeChange={form.setAssetType}
        areaSqm={form.areaSqm}           onAreaSqmChange={form.setAreaSqm}
        rentPerSqm={form.rentPerSqm}     onRentPerSqmChange={form.setRentPerSqm}
        availableFrom={form.availableFrom} onAvailableFromChange={form.setAvailableFrom}
        description={form.description}   onDescriptionChange={form.setDescription}
      />

      <AddressSection
        street={form.street}           onStreetChange={form.setStreet}
        houseNumber={form.houseNumber} onHouseNumberChange={form.setHouseNumber}
        postalCode={form.postalCode}   onPostalCodeChange={form.setPostalCode}
        city={form.city}               onCityChange={form.setCity}
      />

      <SoftFactorsSection softLevels={form.softLevels} onChange={form.setSoftLevel} />

      <TechnicalDetailsSection
        floor={form.floor}               onFloorChange={form.setFloor}
        fitOut={form.fitOut}             onFitOutChange={form.setFitOut}
        fitOutByLandlord={form.fitOutByLandlord} onFitOutByLandlordChange={form.setFitOutByLandlord}
        parking={form.parking}           onParkingChange={form.setParking}
        ceilingHeight={form.ceilingHeight} onCeilingHeightChange={form.setCeilingHeight}
        mieterausbaubeitrag={form.mieterausbaubeitrag} onMieterausbaubeitragChange={form.setMieterausbaubeitrag}
        isFlexible={form.isFlexible}     onIsFlexibleChange={form.setIsFlexible}
        minLettableSqm={form.minLettableSqm} onMinLettableSqmChange={form.setMinLettableSqm}
      />

      <ImageUrlSection
        images={form.images}
        imageInput={form.imageInput}
        onImageInputChange={form.setImageInput}
        onAdd={form.addImage}
        onRemove={form.removeImage}
      />

      <FloorPlanUrlSection
        floorPlanUrl={form.floorPlanUrl}
        onFloorPlanUrlChange={form.setFloorPlanUrl}
      />

      <ContactSection
        name={form.contactName}   onNameChange={form.setContactName}
        email={form.contactEmail} onEmailChange={form.setContactEmail}
        phone={form.contactPhone} onPhoneChange={form.setContactPhone}
      />

      {form.error && <Alert severity="error" sx={{ mb: 2 }}>{form.error}</Alert>}

      <Divider sx={{ mb: 2 }} />

      <Box sx={{ display: 'flex', justifyContent: 'flex-end', gap: 2 }}>
        <Button variant="outlined" onClick={() => navigate(-1)} disabled={form.submitting}>
          Abbrechen
        </Button>
        <Button
          variant="contained"
          sx={{ bgcolor: DS_TEXT.brand, '&:hover': { bgcolor: DS_TEXT.brandDark } }}
          onClick={form.handleSubmit}
          disabled={form.submitting}
          startIcon={form.submitting ? <CircularProgress size={14} color="inherit" /> : null}
        >
          {form.submitting ? 'Wird erstellt…' : 'Inserat veröffentlichen'}
        </Button>
      </Box>
    </Box>
  )
}