import { useState } from 'react';
import { useSeoMeta } from '@unhead/react';
import { useNavigate, Link } from 'react-router-dom';
import ngeohash from 'ngeohash';
import { nip19 } from 'nostr-tools';
import { Layout } from '@/components/Layout';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Textarea } from '@/components/ui/textarea';
import { Label } from '@/components/ui/label';
import { Switch } from '@/components/ui/switch';
import { useNostrPublish } from '@/hooks/useNostrPublish';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useAuthor } from '@/hooks/useAuthor';
import { useUploadFile } from '@/hooks/useUploadFile';
import { useToast } from '@/hooks/useToast';
import { useWallet } from '@/hooks/useWallet';
import { WalletModal } from '@/components/WalletModal';
import { LoginArea } from '@/components/auth/LoginArea';
import { SpotPicker } from '@/components/SpotPicker';
import { NofferField } from '@/components/NofferField';
import { PaymentReadinessNote } from '@/components/PaymentReadinessNote';
import { EntityTypeField } from '@/components/EntityTypeField';
import { CrewLinkField } from '@/components/CrewLinkField';
import {
  SKATE_BUILDER_KIND,
  SKATE_SPOT_KIND,
  BUILDER_SERVICE_LABELS,
  BUILDER_SERVICE_DESCRIPTIONS,
  BUILDER_SKILL_LABELS,
  BUILDER_SCALE_LABELS,
  isValidNoffer,
  type EntityType,
} from '@/lib/types';
import { cn } from '@/lib/utils';
import { HardHat, Upload, X, Loader2, ArrowLeft, MapPin, Wallet, ExternalLink, Hammer } from 'lucide-react';
import { LabProUpgrade } from '@/components/LabProUpgrade';
import { usePlatformFee } from '@/hooks/usePlatformFee';

const SERVICE_ENTRIES = Object.entries(BUILDER_SERVICE_LABELS);
const SKILL_ENTRIES = Object.entries(BUILDER_SKILL_LABELS);
const SCALE_ENTRIES = Object.entries(BUILDER_SCALE_LABELS);

function ChipGrid({
  entries,
  selected,
  onToggle,
}: {
  entries: [string, string][];
  selected: string[];
  onToggle: (key: string) => void;
}) {
  return (
    <div className="flex flex-wrap gap-2">
      {entries.map(([key, label]) => (
        <button
          key={key}
          type="button"
          onClick={() => onToggle(key)}
          className={cn(
            'px-3 py-2 rounded-xl text-xs font-bold border transition-all active:scale-95',
            selected.includes(key)
              ? 'bg-amber-500 text-black border-amber-500'
              : 'bg-gray-800 hover:bg-gray-700 border-gray-700 text-gray-300'
          )}
        >
          {label}
        </button>
      ))}
    </div>
  );
}

export default function BecomeBuilderPage() {
  useSeoMeta({
    title: 'Become a Builder - SkateSpots',
    description: 'List your ramp, park and DIY building services — what you build, materials and scale.',
  });

  const navigate = useNavigate();
  const { user } = useCurrentUser();
  const author = useAuthor(user?.pubkey || '');
  const { mutateAsync: createEvent, isPending: isPublishing } = useNostrPublish();
  const { mutateAsync: uploadFile, isPending: isUploading } = useUploadFile();
  const { toast } = useToast();
  const { webln, activeNWC } = useWallet();

  const hasWallet = !!webln || !!activeNWC;
  const { isActive: isPro, featuredUntilSeconds } = usePlatformFee('labProfile');
  const [goPro, setGoPro] = useState(false);

  const [bio, setBio] = useState('');
  const [location, setLocation] = useState('');
  const [latitude, setLatitude] = useState('');
  const [longitude, setLongitude] = useState('');
  const [selectedServices, setSelectedServices] = useState<string[]>([]);
  const [selectedSkills, setSelectedSkills] = useState<string[]>([]);
  const [selectedScale, setSelectedScale] = useState<string[]>([]);
  const [gear, setGear] = useState('');
  const [serviceArea, setServiceArea] = useState('');
  const [insured, setInsured] = useState(false);
  const [image, setImage] = useState<string | null>(null);
  const [experience, setExperience] = useState('');
  const [rate, setRate] = useState('');
  const [phone, setPhone] = useState('');
  const [email, setEmail] = useState('');
  const [website, setWebsite] = useState('');
  const [portfolio, setPortfolio] = useState('');
  const [social, setSocial] = useState('');
  const [noffer, setNoffer] = useState('');
  const [entityType, setEntityType] = useState<EntityType>('collective');
  const [members, setMembers] = useState<string[]>([]);
  const [crewRef, setCrewRef] = useState<string | undefined>(undefined);
  const [selectedSpots, setSelectedSpots] = useState<string[]>([]);
  const [isGettingLocation, setIsGettingLocation] = useState(false);

  const getDisplayName = () => {
    if (author.data?.metadata?.name) return author.data.metadata.name;
    if (user?.pubkey) {
      const npub = nip19.npubEncode(user.pubkey);
      return `${npub.slice(0, 12)}...${npub.slice(-4)}`;
    }
    return 'Anonymous Builder';
  };

  const toggle = (setter: React.Dispatch<React.SetStateAction<string[]>>) => (key: string) => {
    setter((prev) => (prev.includes(key) ? prev.filter((s) => s !== key) : [...prev, key]));
  };

  const getCurrentLocation = () => {
    if (!navigator.geolocation) {
      toast({ title: 'Geolocation not supported', variant: 'destructive' });
      return;
    }
    setIsGettingLocation(true);
    navigator.geolocation.getCurrentPosition(
      (position) => {
        setLatitude(position.coords.latitude.toFixed(6));
        setLongitude(position.coords.longitude.toFixed(6));
        setIsGettingLocation(false);
        toast({ title: 'Location found' });
      },
      (error) => {
        setIsGettingLocation(false);
        toast({ title: 'Location error', description: error.message, variant: 'destructive' });
      }
    );
  };

  const handleImageUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const files = e.target.files;
    if (!files || files.length === 0) return;
    try {
      const file = files[0];
      const tags = await uploadFile(file);
      const url = tags[0]?.[1];
      if (url) {
        setImage(url);
        toast({ title: 'Image uploaded' });
      }
    } catch (error) {
      toast({ title: 'Upload failed', description: error instanceof Error ? error.message : 'Failed', variant: 'destructive' });
    }
    e.target.value = '';
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();

    if (selectedServices.length === 0) {
      toast({ title: 'Build types required', description: 'Select at least one thing you build.', variant: 'destructive' });
      return;
    }

    try {
      const identifier = 'builder-profile';
      const displayName = getDisplayName();

      const tags: string[][] = [
        ['d', identifier],
        ['title', displayName],
        ['t', 'skatebuilder'],
        ['alt', `Skate ramp/park builder: ${displayName}`],
      ];

      if (location.trim()) tags.push(['location', location.trim()]);

      if (latitude && longitude) {
        const lat = parseFloat(latitude);
        const lng = parseFloat(longitude);
        if (!isNaN(lat) && !isNaN(lng)) {
          const geohash = ngeohash.encode(lat, lng, 7);
          tags.push(['g', geohash]);
        }
      }

      for (const s of [...selectedServices, ...selectedSkills, ...selectedScale]) {
        tags.push(['t', s]);
      }

      if (gear.trim()) tags.push(['gear', gear.trim()]);
      if (serviceArea.trim()) tags.push(['service_area', serviceArea.trim()]);
      if (insured) tags.push(['insured', 'true']);
      if (image) tags.push(['image', image]);
      if (experience.trim()) tags.push(['experience', experience.trim()]);
      if (rate.trim()) tags.push(['rate', rate.trim()]);
      if (phone.trim()) tags.push(['phone', phone.trim()]);
      if (email.trim()) tags.push(['email', email.trim()]);
      if (website.trim()) tags.push(['website', website.trim()]);
      if (portfolio.trim()) tags.push(['portfolio', portfolio.trim()]);
      if (social.trim()) tags.push(['social', social.trim()]);
      if (isValidNoffer(noffer.trim())) tags.push(['noffer', noffer.trim().toLowerCase()]);

      tags.push(['entity', entityType]);
      if (entityType === 'collective') {
        for (const pk of members) tags.push(['p', pk]);
        if (crewRef) tags.push(['a', crewRef]);
      }

      for (const spotId of selectedSpots) {
        const [spotPubkey, spotIdentifier] = spotId.split(':');
        tags.push(['a', `${SKATE_SPOT_KIND}:${spotPubkey}:${spotIdentifier}`]);
      }

      // Pro / featured listing (optional, paid)
      if (isPro && featuredUntilSeconds) {
        tags.push(['featured', String(featuredUntilSeconds)]);
      }

      await createEvent({
        kind: SKATE_BUILDER_KIND,
        content: bio.trim(),
        tags,
      });

      toast({ title: 'Builder profile created!', description: 'Your profile has been published.' });
      navigate(`/coach/${user?.pubkey}/${identifier}`);
    } catch (error) {
      toast({ title: 'Failed to publish', description: error instanceof Error ? error.message : 'Error', variant: 'destructive' });
    }
  };

  if (!user) {
    return (
      <Layout>
        <div className="container px-4 py-8">
          <Card className="max-w-xl mx-auto bg-gray-900 border-gray-700">
            <CardContent className="py-12 text-center">
              <HardHat className="h-12 w-12 mx-auto mb-4 text-gray-600" />
              <h2 className="text-xl font-bold mb-2">Login Required</h2>
              <p className="text-gray-400 mb-6">You need to log in to create a builder profile.</p>
              <LoginArea className="justify-center max-w-60 mx-auto" />
            </CardContent>
          </Card>
        </div>
      </Layout>
    );
  }

  const hasNip05 = user?.metadata?.nip05;

  return (
    <Layout>
      <div className="container px-4 sm:px-6 py-6 sm:py-8 max-w-2xl">
        <div className="mb-6">
          <Link to="/lab" className="inline-flex items-center text-gray-400 hover:text-white transition-colors mb-4">
            <ArrowLeft className="h-4 w-4 mr-2" />
            Back to The Lab
          </Link>
          <h1 className="text-3xl font-black uppercase text-amber-400" style={{ fontFamily: 'Impact, "Arial Black", sans-serif' }}>
            Become a Builder
          </h1>
          <p className="text-gray-400 mt-1">Pour it, weld it, build it — list your ramp & park building</p>

          {!hasNip05 && (
            <Card className="mt-4 bg-yellow-950/30 border-2 border-yellow-500/50">
              <CardContent className="p-4">
                <div className="flex items-start gap-3">
                  <div className="text-yellow-500">⚠️</div>
                  <div>
                    <h3 className="font-bold text-yellow-400 mb-1">NIP-05 Verification Required</h3>
                    <p className="text-sm text-gray-300 mb-2">
                      Add a NIP-05 identifier to your profile to verify your identity and build trust with clients.
                    </p>
                    <Link to="/settings">
                      <Button variant="outline" size="sm" className="border-yellow-500/50 hover:bg-yellow-500/10 text-yellow-400 font-bold">
                        Add NIP-05 in Settings
                      </Button>
                    </Link>
                  </div>
                </div>
              </CardContent>
            </Card>
          )}

          {/* Wallet Requirement */}
          <Card className="mt-4 bg-amber-950/30 border-2 border-amber-500/50">
            <CardContent className="p-4">
              <div className="flex items-start gap-3">
                <Wallet className="h-6 w-6 text-amber-400 flex-shrink-0 mt-0.5" />
                <div className="flex-1">
                  <h3 className="font-bold text-amber-400 mb-2">⚡ Payment Setup Required</h3>
                  <p className="text-sm text-gray-300 mb-3">
                    To get paid for builds, connect a Lightning wallet. Clients zap you directly for your work.
                  </p>
                  {hasWallet ? (
                    <div className="p-3 rounded-lg bg-green-950/30 border border-green-500/50">
                      <div className="flex items-center gap-2 mb-1">
                        <div className="h-2 w-2 rounded-full bg-green-500" />
                        <p className="text-sm font-bold text-green-400">Wallet Connected — Ready to Receive Payments!</p>
                      </div>
                      <p className="text-xs text-gray-400">{webln ? 'Using WebLN browser extension' : 'Using Nostr Wallet Connect'}</p>
                    </div>
                  ) : (
                    <div className="space-y-3">
                      <div className="p-3 rounded-lg bg-red-950/30 border border-red-500/50">
                        <div className="flex items-center gap-2">
                          <div className="h-2 w-2 rounded-full bg-red-500" />
                          <p className="text-sm font-bold text-red-400">No Wallet Connected</p>
                        </div>
                      </div>
                      <div className="flex flex-col sm:flex-row gap-2">
                        <WalletModal>
                          <Button className="gap-2 bg-amber-500 hover:bg-amber-600 text-black flex-1">
                            <Wallet className="h-4 w-4" />
                            Connect Wallet with NWC
                          </Button>
                        </WalletModal>
                        <a href="https://planb.academy/en/tutorials/wallet" target="_blank" rel="noopener noreferrer" className="flex-1">
                          <Button variant="outline" className="gap-2 w-full border-amber-500/50 text-amber-400 hover:bg-amber-500/10">
                            <ExternalLink className="h-4 w-4" />
                            Learn How
                          </Button>
                        </a>
                      </div>
                      <p className="text-xs text-gray-400 italic">
                        💡 Tip: Most Lightning wallets support NWC (Alby, Minibits, Zeus, Coinos).
                      </p>
                    </div>
                  )}
                </div>
              </div>
            </CardContent>
          </Card>
        </div>

        <form onSubmit={handleSubmit}>
          <Card className="bg-gray-900 border-gray-700">
            <CardHeader>
              <CardTitle className="flex items-center gap-2">
                <HardHat className="h-5 w-5 text-amber-400" /> Builder Profile
              </CardTitle>
              <CardDescription className="text-gray-400">Tell the scene what you build and how you work</CardDescription>
            </CardHeader>
            <CardContent className="space-y-6">
              <div className="space-y-2">
                <Label>Your Builder Identity</Label>
                <div className="p-4 rounded-lg border-2 border-amber-500/30 bg-amber-500/5">
                  <p className="font-black text-lg">{getDisplayName()}</p>
                  <p className="text-sm text-gray-400 mt-1">From your Nostr profile</p>
                </div>
              </div>

              <div className="space-y-2">
                <Label htmlFor="bio">Bio / About Your Builds</Label>
                <Textarea id="bio" placeholder="Your crew, notable builds, how you approach a project..." value={bio} onChange={(e) => setBio(e.target.value)} rows={5} className="bg-gray-800 border-gray-700" />
              </div>

              {/* Individual vs Collective — defaults to collective for builders */}
              <EntityTypeField
                entityType={entityType}
                onEntityTypeChange={setEntityType}
                members={members}
                onMembersChange={setMembers}
                accentBg="bg-amber-500 hover:bg-amber-600 text-black"
                accentText="text-amber-400"
              />

              {entityType === 'collective' && (
                <CrewLinkField value={crewRef} onChange={setCrewRef} accentBg="bg-amber-500 hover:bg-amber-600 text-black" accentText="text-amber-400" />
              )}

              {/* Build types */}
              <div className="space-y-3">
                <Label>What You Build * (select at least one)</Label>
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-2">
                  {SERVICE_ENTRIES.map(([service, label]) => (
                    <button
                      key={service}
                      type="button"
                      onClick={() => toggle(setSelectedServices)(service)}
                      className={cn(
                        'p-3 rounded-lg text-left transition-all border text-sm',
                        selectedServices.includes(service)
                          ? 'bg-amber-500 text-black border-amber-500'
                          : 'bg-gray-800 hover:bg-gray-700 border-gray-700'
                      )}
                    >
                      <div className="font-bold">{label}</div>
                      <div className={cn('text-xs mt-1 line-clamp-1', selectedServices.includes(service) ? 'text-black/70' : 'text-gray-400')}>
                        {BUILDER_SERVICE_DESCRIPTIONS[service]}
                      </div>
                    </button>
                  ))}
                </div>
              </div>

              {/* Materials / trade skills */}
              <div className="space-y-3">
                <Label className="flex items-center gap-2"><Hammer className="h-4 w-4 text-amber-400" /> Materials & Trade Skills</Label>
                <ChipGrid entries={SKILL_ENTRIES} selected={selectedSkills} onToggle={toggle(setSelectedSkills)} />
              </div>

              {/* Scale */}
              <div className="space-y-3">
                <Label className="flex items-center gap-2">📐 Project Scale</Label>
                <ChipGrid entries={SCALE_ENTRIES} selected={selectedScale} onToggle={toggle(setSelectedScale)} />
              </div>

              {/* Freeform "how we work" */}
              <div className="space-y-2">
                <Label htmlFor="gear">How You Work / Equipment (optional)</Label>
                <Textarea
                  id="gear"
                  placeholder="e.g. Full concrete crew, own mixer + shotcrete rig, mobile welding, we handle permits and drainage..."
                  value={gear}
                  onChange={(e) => setGear(e.target.value)}
                  rows={3}
                  className="bg-gray-800 border-gray-700"
                />
                <p className="text-xs text-gray-500">Crews and clients love knowing your kit and process.</p>
              </div>

              <div className="grid grid-cols-2 gap-4">
                <div className="space-y-2">
                  <Label htmlFor="experience">Years Building</Label>
                  <Input id="experience" type="number" placeholder="10" value={experience} onChange={(e) => setExperience(e.target.value)} className="bg-gray-800 border-gray-700" />
                </div>
                <div className="space-y-2">
                  <Label htmlFor="rate">Rate / Quote Basis</Label>
                  <Input id="rate" placeholder="per m² / by project" value={rate} onChange={(e) => setRate(e.target.value)} className="bg-gray-800 border-gray-700" />
                </div>
              </div>

              <div className="space-y-2">
                <Label htmlFor="serviceArea">Service Area</Label>
                <Input id="serviceArea" placeholder="e.g. Catalonia, will travel across EU" value={serviceArea} onChange={(e) => setServiceArea(e.target.value)} className="bg-gray-800 border-gray-700" />
              </div>

              <div className="flex items-center justify-between rounded-lg border border-gray-700 bg-gray-800/60 p-3">
                <div>
                  <Label htmlFor="insured" className="font-bold">Licensed / Insured</Label>
                  <p className="text-xs text-gray-500">Relevant for public park & council work</p>
                </div>
                <Switch id="insured" checked={insured} onCheckedChange={setInsured} />
              </div>

              <div className="space-y-2">
                <Label htmlFor="location">City / Base</Label>
                <Input id="location" placeholder="Malmö, SE" value={location} onChange={(e) => setLocation(e.target.value)} className="bg-gray-800 border-gray-700" />
              </div>

              {/* Contact */}
              <div className="space-y-3">
                <Label className="text-base font-bold">Contact & Portfolio</Label>
                <p className="text-sm text-gray-400">How the scene can see your builds and reach you (all optional, but recommended)</p>
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <div className="space-y-2">
                    <Label htmlFor="portfolio">Past Builds / Instagram</Label>
                    <Input id="portfolio" type="url" placeholder="https://instagram.com/crew" value={portfolio} onChange={(e) => setPortfolio(e.target.value)} className="bg-gray-800 border-gray-700" />
                  </div>
                  <div className="space-y-2">
                    <Label htmlFor="website">Website</Label>
                    <Input id="website" type="url" placeholder="https://ourbuilds.com" value={website} onChange={(e) => setWebsite(e.target.value)} className="bg-gray-800 border-gray-700" />
                  </div>
                  <div className="space-y-2">
                    <Label htmlFor="phone">Phone Number</Label>
                    <Input id="phone" type="tel" placeholder="+1 234 567 8900" value={phone} onChange={(e) => setPhone(e.target.value)} className="bg-gray-800 border-gray-700" />
                  </div>
                  <div className="space-y-2">
                    <Label htmlFor="email">Email</Label>
                    <Input id="email" type="email" placeholder="crew@example.com" value={email} onChange={(e) => setEmail(e.target.value)} className="bg-gray-800 border-gray-700" />
                  </div>
                  <div className="space-y-2 sm:col-span-2">
                    <Label htmlFor="social">Other Social</Label>
                    <Input id="social" placeholder="@username or link" value={social} onChange={(e) => setSocial(e.target.value)} className="bg-gray-800 border-gray-700" />
                  </div>
                </div>
                <PaymentReadinessNote />
                <NofferField value={noffer} onChange={setNoffer} />
                <div className="p-3 rounded-lg border border-amber-500/30 bg-amber-500/5">
                  <p className="text-sm text-gray-300">💬 Clients can message you directly through SkateSpots' encrypted messaging</p>
                </div>
              </div>

              {/* Spot Picker — spots they've built */}
              <SpotPicker
                selectedSpots={selectedSpots}
                onSpotsChange={setSelectedSpots}
                maxSpots={8}
                label="Spots You've Built"
                description="Link spots and parks you built so people can see your work on the map"
              />

              <div className="space-y-2">
                <Label>Coordinates (optional)</Label>
                <div className="grid grid-cols-2 gap-4">
                  <Input placeholder="Latitude" value={latitude} onChange={(e) => setLatitude(e.target.value)} className="bg-gray-800 border-gray-700" />
                  <Input placeholder="Longitude" value={longitude} onChange={(e) => setLongitude(e.target.value)} className="bg-gray-800 border-gray-700" />
                </div>
                <Button type="button" variant="outline" size="sm" onClick={getCurrentLocation} disabled={isGettingLocation} className="mt-2 border-gray-700">
                  {isGettingLocation ? <><Loader2 className="h-4 w-4 mr-2 animate-spin" />Getting...</> : <><MapPin className="h-4 w-4 mr-2" />Use current location</>}
                </Button>
              </div>

              <div className="space-y-2">
                <Label>Logo / Photo</Label>
                {image ? (
                  <div className="relative w-32 h-32 rounded-full overflow-hidden bg-gray-800">
                    <img src={image} alt="Profile" className="w-full h-full object-cover" />
                    <button type="button" onClick={() => setImage(null)} className="absolute top-2 right-2 p-1 rounded-full bg-black/80 hover:bg-red-500">
                      <X className="h-4 w-4" />
                    </button>
                  </div>
                ) : (
                  <label className="w-32 h-32 rounded-full border-2 border-dashed border-gray-700 flex flex-col items-center justify-center cursor-pointer hover:bg-gray-800/50">
                    <input type="file" accept="image/*" className="hidden" onChange={handleImageUpload} disabled={isUploading} />
                    {isUploading ? <Loader2 className="h-6 w-6 animate-spin" /> : <><Upload className="h-6 w-6 mb-1 text-gray-500" /><span className="text-xs text-gray-500">Upload</span></>}
                  </label>
                )}
              </div>

              {/* Optional Pro upgrade — free to list without it */}
              <LabProUpgrade enabled={goPro} onEnabledChange={setGoPro} accentText="text-amber-400" entityCoord={user ? `${SKATE_BUILDER_KIND}:${user.pubkey}:builder-profile` : undefined} />

              <Button
                type="submit"
                className="w-full bg-amber-500 hover:bg-amber-600 text-black uppercase font-black"
                disabled={isPublishing || isUploading}
              >
                {isPublishing ? (
                  <><Loader2 className="h-4 w-4 mr-2 animate-spin" />Publishing...</>
                ) : (
                  <><HardHat className="h-4 w-4 mr-2" />{isPro ? 'CREATE PRO BUILDER PROFILE' : 'CREATE BUILDER PROFILE'}</>
                )}
              </Button>
            </CardContent>
          </Card>
        </form>
      </div>
    </Layout>
  );
}