import { ExternalLink, Heart, X, Bed, Maximize2, PoundSterling, Building, Clock, MapPin, Footprints, Bike, Train } from 'lucide-react';
import { Button } from './ui/button';
import { PhotoCarousel } from './PhotoCarousel';
import type { ListingDetailData, DecisionType, POIDistanceInfo } from '@/types';

function formatDate(value: string): string {
    const date = new Date(value);
    if (isNaN(date.getTime())) return value;
    return date.toLocaleDateString('en-GB', { day: 'numeric', month: 'short', year: 'numeric' });
}

interface ListingDetailProps {
  detail: ListingDetailData;
  onDecide: (decision: DecisionType) => void;
  onClearDecision: () => void;
}

function formatDuration(seconds: number): string {
  const minutes = Math.round(seconds / 60);
  if (minutes < 60) return `${minutes}m`;
  const hours = Math.floor(minutes / 60);
  const mins = minutes % 60;
  return mins > 0 ? `${hours}h${mins}m` : `${hours}h`;
}

function TravelModeIcon({ mode }: { mode: string }) {
  switch (mode) {
    case 'WALK': return <Footprints className="h-3 w-3" />;
    case 'BICYCLE': return <Bike className="h-3 w-3" />;
    case 'TRANSIT': return <Train className="h-3 w-3" />;
    default: return null;
  }
}

export function ListingDetail({ detail, onDecide, onClearDecision }: ListingDetailProps) {
  const allPhotos = [
    ...detail.photos,
    ...detail.floorplans.map(fp => ({ url: fp.url, caption: fp.caption || 'Floorplan', type: 'FLOORPLAN' as string | null })),
  ];

  return (
    <div className="pb-8">
      {/* Photo carousel */}
      <PhotoCarousel photos={allPhotos} />

      <div className="px-4 pt-4 space-y-4">
        {/* Price + address */}
        <div>
          <div className="flex items-start justify-between">
            <div>
              <div className="text-2xl font-bold">
                £{detail.price.toLocaleString()}
                {detail.listing_type !== 'BUY' && (
                  <span className="text-muted-foreground font-normal text-base">/mo</span>
                )}
              </div>
              {detail.display_address && (
                <div className="flex items-center gap-1 text-sm text-muted-foreground mt-1">
                  <MapPin className="h-3.5 w-3.5" />
                  {detail.display_address}
                </div>
              )}
            </div>
          </div>
        </div>

        {/* Like/Dislike buttons */}
        <div className="flex gap-3">
          <Button
            variant={detail.decision === 'disliked' ? 'destructive' : 'outline'}
            className="flex-1"
            onClick={() => detail.decision === 'disliked' ? onClearDecision() : onDecide('disliked')}
          >
            <X className="h-4 w-4 mr-2" />
            {detail.decision === 'disliked' ? 'Disliked' : 'Dislike'}
          </Button>
          <Button
            variant={detail.decision === 'liked' ? 'default' : 'outline'}
            className={`flex-1 ${detail.decision === 'liked' ? 'bg-green-600 hover:bg-green-700' : ''}`}
            onClick={() => detail.decision === 'liked' ? onClearDecision() : onDecide('liked')}
          >
            <Heart className={`h-4 w-4 mr-2 ${detail.decision === 'liked' ? 'fill-current' : ''}`} />
            {detail.decision === 'liked' ? 'Liked' : 'Like'}
          </Button>
        </div>

        {/* Key stats */}
        <div className="grid grid-cols-3 gap-3">
          <div className="flex items-center gap-2 text-sm">
            <Bed className="h-4 w-4 text-muted-foreground" />
            <span><strong>{detail.number_of_bedrooms}</strong> beds</span>
          </div>
          <div className="flex items-center gap-2 text-sm">
            <Maximize2 className="h-4 w-4 text-muted-foreground" />
            <span><strong>{detail.square_meters ?? '\u2014'}</strong> m²</span>
          </div>
          <div className="flex items-center gap-2 text-sm">
            <PoundSterling className="h-4 w-4 text-muted-foreground" />
            <span><strong>{detail.square_meters ? `£${Math.round(detail.price / detail.square_meters)}` : '\u2014'}</strong>/m²</span>
          </div>
        </div>

        {/* Key features */}
        {detail.key_features.length > 0 && (
          <div>
            <h3 className="text-sm font-semibold mb-2">Key Features</h3>
            <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1">
              {detail.key_features.map((f, i) => (
                <li key={i}>{f}</li>
              ))}
            </ul>
          </div>
        )}

        {/* Description */}
        {detail.description && (
          <div>
            <h3 className="text-sm font-semibold mb-2">Description</h3>
            <p className="text-sm text-muted-foreground whitespace-pre-line">{detail.description}</p>
          </div>
        )}

        {/* Property details grid */}
        <div>
          <h3 className="text-sm font-semibold mb-2">Details</h3>
          <div className="grid grid-cols-2 gap-2 text-sm">
            {detail.property_sub_type && (
              <div className="flex items-center gap-2">
                <Building className="h-4 w-4 text-muted-foreground" />
                <span>{detail.property_sub_type}</span>
              </div>
            )}
            {detail.furnish_type && (
              <div className="flex items-center gap-2">
                <span className="text-muted-foreground">Furnishing:</span>
                <span>{detail.furnish_type}</span>
              </div>
            )}
            {detail.council_tax_band && (
              <div className="flex items-center gap-2">
                <span className="text-muted-foreground">Council Tax:</span>
                <span>Band {detail.council_tax_band}</span>
              </div>
            )}
            {detail.available_from && (
              <div className="flex items-center gap-2">
                <Clock className="h-4 w-4 text-muted-foreground" />
                <span>Available {formatDate(detail.available_from)}</span>
              </div>
            )}
            {detail.service_charge != null && (
              <div className="flex items-center gap-2">
                <span className="text-muted-foreground">Service charge:</span>
                <span>£{detail.service_charge.toLocaleString()}</span>
              </div>
            )}
            {detail.lease_left != null && (
              <div className="flex items-center gap-2">
                <span className="text-muted-foreground">Lease:</span>
                <span>{detail.lease_left} years</span>
              </div>
            )}
          </div>
        </div>

        {/* Floorplans */}
        {detail.floorplans.length > 0 && (
          <div>
            <h3 className="text-sm font-semibold mb-2">Floorplans</h3>
            <div className="space-y-2">
              {detail.floorplans.map((fp, i) => (
                <img key={i} src={fp.url} alt={fp.caption || 'Floorplan'} className="w-full rounded-md border" />
              ))}
            </div>
          </div>
        )}

        {/* Price history */}
        {detail.price_history.length > 1 && (
          <div>
            <h3 className="text-sm font-semibold mb-2">Price History</h3>
            <div className="space-y-1">
              {detail.price_history.map((entry) => (
                <div key={entry.id} className="text-sm flex justify-between">
                  <span className="text-muted-foreground">{entry.last_seen.split('T')[0]}</span>
                  <span>£{entry.price.toLocaleString()}</span>
                </div>
              ))}
            </div>
          </div>
        )}

        {/* POI distances */}
        {detail.poi_distances.length > 0 && (
          <div>
            <h3 className="text-sm font-semibold mb-2">Travel Times</h3>
            <div className="flex flex-wrap gap-1.5">
              {detail.poi_distances.map((d: POIDistanceInfo) => (
                <div key={`${d.poi_id}_${d.travel_mode}`} className="flex items-center gap-1 text-xs text-muted-foreground bg-muted/50 px-1.5 py-0.5 rounded">
                  <span className="font-medium">{d.poi_name}:</span>
                  <TravelModeIcon mode={d.travel_mode} />
                  {formatDuration(d.duration_seconds)}
                </div>
              ))}
            </div>
          </div>
        )}

        {/* Agency */}
        {detail.agency && (
          <div className="flex items-center gap-2 text-sm text-muted-foreground">
            <Building className="h-4 w-4" />
            <span>{detail.agency}</span>
          </div>
        )}

        {/* External link */}
        <Button asChild variant="outline" className="w-full">
          <a href={detail.url} target="_blank" rel="noopener noreferrer">
            View on Rightmove
            <ExternalLink className="ml-2 h-4 w-4" />
          </a>
        </Button>
      </div>
    </div>
  );
}