/**
 * OnboardingWizard — 3-step minimalist onboarding.
 *
 * Shown after first registration. Claude-inspired: clean, fast, no friction.
 * Step 1: Your name
 * Step 2: What you'll use HomePilot for + preferred tone
 * Step 3: Ready — welcome screen
 */
import React, { useState } from 'react';
import { ArrowRight, ArrowLeft, Check, Sparkles, MessageSquare, Image, Search, Heart, Film } from 'lucide-react';
const USE_CASES = [
    { id: 'chat', label: 'Chat & Conversation', icon: MessageSquare, color: '#3b82f6' },
    { id: 'images', label: 'Image Generation', icon: Image, color: '#8b5cf6' },
    { id: 'research', label: 'Research & Knowledge', icon: Search, color: '#06b6d4' },
    { id: 'companion', label: 'AI Companion', icon: Heart, color: '#ec4899' },
    { id: 'content', label: 'Content Creation', icon: Film, color: '#f59e0b' },
];
const TONES = [
    { id: 'casual', label: 'Casual', desc: 'Friendly and relaxed' },
    { id: 'balanced', label: 'Balanced', desc: 'Natural and adaptable' },
    { id: 'professional', label: 'Professional', desc: 'Clear and formal' },
];
export default function OnboardingWizard({ backendUrl, token, username, onComplete }) {
    const [step, setStep] = useState(1);
    const [displayName, setDisplayName] = useState('');
    const [selectedUseCases, setSelectedUseCases] = useState([]);
    const [tone, setTone] = useState('balanced');
    const [saving, setSaving] = useState(false);
    const toggleUseCase = (id) => {
        setSelectedUseCases(prev => prev.includes(id) ? prev.filter(x => x !== id) : [...prev, id]);
    };
    const handleFinish = async () => {
        setSaving(true);
        try {
            await fetch(`${backendUrl}/v1/auth/onboarding`, {
                method: 'PUT',
                headers: {
                    'Content-Type': 'application/json',
                    'Authorization': `Bearer ${token}`,
                },
                credentials: 'include',
                body: JSON.stringify({
                    display_name: displayName.trim() || username,
                    use_cases: selectedUseCases,
                    preferred_tone: tone,
                }),
            });
        }
        catch {
            // Non-fatal — proceed anyway
        }
        setSaving(false);
        onComplete(displayName.trim() || username);
    };
    const cardStyle = {
        width: '100%',
        maxWidth: 480,
        background: 'rgba(30, 41, 59, 0.8)',
        border: '1px solid rgba(148, 163, 184, 0.1)',
        borderRadius: 16,
        padding: 32,
        backdropFilter: 'blur(12px)',
    };
    return (<div style={{
            minHeight: '100vh',
            display: 'flex',
            flexDirection: 'column',
            alignItems: 'center',
            justifyContent: 'center',
            background: 'linear-gradient(135deg, #0a0a1a 0%, #111827 50%, #0f172a 100%)',
            fontFamily: 'system-ui, -apple-system, sans-serif',
            padding: 20,
        }}>
      {/* Progress dots */}
      <div style={{ display: 'flex', gap: 8, marginBottom: 24 }}>
        {[1, 2, 3].map(s => (<div key={s} style={{
                width: 8,
                height: 8,
                borderRadius: '50%',
                background: s <= step ? '#3b82f6' : 'rgba(148, 163, 184, 0.2)',
                transition: 'background 0.3s',
            }}/>))}
      </div>

      {/* Step 1: Your name */}
      {step === 1 && (<div style={cardStyle}>
          <div style={{ textAlign: 'center', marginBottom: 24 }}>
            <Sparkles size={32} style={{ color: '#3b82f6', marginBottom: 12 }}/>
            <h2 style={{ fontSize: 22, fontWeight: 700, color: '#e2e8f0', margin: 0 }}>
              Welcome to HomePilot
            </h2>
            <p style={{ color: '#94a3b8', fontSize: 14, marginTop: 8 }}>
              Let's set up your profile so your AI companions know who you are.
            </p>
          </div>

          <label style={{ display: 'block', fontSize: 13, color: '#94a3b8', marginBottom: 8, fontWeight: 500 }}>
            What should we call you?
          </label>
          <input type="text" value={displayName} onChange={e => setDisplayName(e.target.value)} placeholder={username} autoFocus maxLength={64} style={{
                width: '100%',
                padding: '12px 14px',
                borderRadius: 10,
                border: '1px solid rgba(148, 163, 184, 0.15)',
                background: 'rgba(15, 23, 42, 0.5)',
                color: '#e2e8f0',
                fontSize: 16,
                outline: 'none',
                boxSizing: 'border-box',
                marginBottom: 24,
            }} onKeyDown={e => e.key === 'Enter' && setStep(2)}/>

          <button onClick={() => setStep(2)} style={{
                width: '100%',
                padding: 12,
                borderRadius: 10,
                border: 'none',
                background: 'linear-gradient(135deg, #2563eb 0%, #3b82f6 100%)',
                color: '#fff',
                fontSize: 15,
                fontWeight: 600,
                cursor: 'pointer',
                display: 'flex',
                alignItems: 'center',
                justifyContent: 'center',
                gap: 8,
            }}>
            Continue <ArrowRight size={16}/>
          </button>
        </div>)}

      {/* Step 2: Use cases + tone */}
      {step === 2 && (<div style={cardStyle}>
          <div style={{ textAlign: 'center', marginBottom: 24 }}>
            <h2 style={{ fontSize: 20, fontWeight: 700, color: '#e2e8f0', margin: 0 }}>
              How will you use HomePilot?
            </h2>
            <p style={{ color: '#94a3b8', fontSize: 13, marginTop: 6 }}>
              Select all that apply — this helps personalize your experience.
            </p>
          </div>

          {/* Use case chips */}
          <div style={{ display: 'flex', flexWrap: 'wrap', gap: 8, marginBottom: 24 }}>
            {USE_CASES.map(uc => {
                const selected = selectedUseCases.includes(uc.id);
                const Icon = uc.icon;
                return (<button key={uc.id} onClick={() => toggleUseCase(uc.id)} style={{
                        display: 'flex',
                        alignItems: 'center',
                        gap: 6,
                        padding: '8px 14px',
                        borderRadius: 20,
                        border: `1.5px solid ${selected ? uc.color : 'rgba(148, 163, 184, 0.15)'}`,
                        background: selected ? `${uc.color}20` : 'transparent',
                        color: selected ? uc.color : '#94a3b8',
                        fontSize: 13,
                        fontWeight: 500,
                        cursor: 'pointer',
                        transition: 'all 0.2s',
                    }}>
                  <Icon size={14}/>
                  {uc.label}
                  {selected && <Check size={12}/>}
                </button>);
            })}
          </div>

          {/* Tone */}
          <label style={{ display: 'block', fontSize: 13, color: '#94a3b8', marginBottom: 8, fontWeight: 500 }}>
            Preferred conversation style
          </label>
          <div style={{ display: 'flex', gap: 8, marginBottom: 24 }}>
            {TONES.map(t => (<button key={t.id} onClick={() => setTone(t.id)} style={{
                    flex: 1,
                    padding: '10px 8px',
                    borderRadius: 10,
                    border: `1.5px solid ${tone === t.id ? '#3b82f6' : 'rgba(148, 163, 184, 0.15)'}`,
                    background: tone === t.id ? 'rgba(59, 130, 246, 0.1)' : 'transparent',
                    color: tone === t.id ? '#93c5fd' : '#94a3b8',
                    fontSize: 13,
                    fontWeight: 500,
                    cursor: 'pointer',
                    textAlign: 'center',
                    transition: 'all 0.2s',
                }}>
                <div>{t.label}</div>
                <div style={{ fontSize: 11, color: '#64748b', marginTop: 2 }}>{t.desc}</div>
              </button>))}
          </div>

          <div style={{ display: 'flex', gap: 8 }}>
            <button onClick={() => setStep(1)} style={{
                padding: '12px 20px',
                borderRadius: 10,
                border: '1px solid rgba(148, 163, 184, 0.15)',
                background: 'transparent',
                color: '#94a3b8',
                fontSize: 14,
                cursor: 'pointer',
                display: 'flex',
                alignItems: 'center',
                gap: 6,
            }}>
              <ArrowLeft size={14}/> Back
            </button>
            <button onClick={() => setStep(3)} style={{
                flex: 1,
                padding: 12,
                borderRadius: 10,
                border: 'none',
                background: 'linear-gradient(135deg, #2563eb 0%, #3b82f6 100%)',
                color: '#fff',
                fontSize: 15,
                fontWeight: 600,
                cursor: 'pointer',
                display: 'flex',
                alignItems: 'center',
                justifyContent: 'center',
                gap: 8,
            }}>
              Continue <ArrowRight size={16}/>
            </button>
          </div>
        </div>)}

      {/* Step 3: Ready */}
      {step === 3 && (<div style={cardStyle}>
          <div style={{ textAlign: 'center', marginBottom: 24 }}>
            <div style={{
                width: 56,
                height: 56,
                borderRadius: '50%',
                background: 'linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%)',
                display: 'flex',
                alignItems: 'center',
                justifyContent: 'center',
                margin: '0 auto 16px',
            }}>
              <Check size={28} style={{ color: '#fff' }}/>
            </div>
            <h2 style={{ fontSize: 22, fontWeight: 700, color: '#e2e8f0', margin: 0 }}>
              You're all set{displayName ? `, ${displayName}` : ''}!
            </h2>
            <p style={{ color: '#94a3b8', fontSize: 14, marginTop: 8, lineHeight: 1.5 }}>
              Your profile is ready. Your AI companions will use this to personalize your experience over time.
            </p>
          </div>

          {/* Summary */}
          <div style={{
                background: 'rgba(15, 23, 42, 0.5)',
                borderRadius: 10,
                padding: 16,
                marginBottom: 24,
                fontSize: 13,
                color: '#94a3b8',
            }}>
            {displayName && <div>Name: <span style={{ color: '#e2e8f0' }}>{displayName}</span></div>}
            {selectedUseCases.length > 0 && (<div style={{ marginTop: 6 }}>
                Interests: <span style={{ color: '#e2e8f0' }}>
                  {selectedUseCases.map(id => USE_CASES.find(u => u.id === id)?.label).join(', ')}
                </span>
              </div>)}
            <div style={{ marginTop: 6 }}>
              Style: <span style={{ color: '#e2e8f0' }}>{TONES.find(t => t.id === tone)?.label}</span>
            </div>
          </div>

          <div style={{ display: 'flex', gap: 8 }}>
            <button onClick={() => setStep(2)} style={{
                padding: '12px 20px',
                borderRadius: 10,
                border: '1px solid rgba(148, 163, 184, 0.15)',
                background: 'transparent',
                color: '#94a3b8',
                fontSize: 14,
                cursor: 'pointer',
                display: 'flex',
                alignItems: 'center',
                gap: 6,
            }}>
              <ArrowLeft size={14}/> Back
            </button>
            <button onClick={handleFinish} disabled={saving} style={{
                flex: 1,
                padding: 12,
                borderRadius: 10,
                border: 'none',
                background: saving ? '#1e3a5f' : 'linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%)',
                color: '#fff',
                fontSize: 15,
                fontWeight: 600,
                cursor: saving ? 'wait' : 'pointer',
                display: 'flex',
                alignItems: 'center',
                justifyContent: 'center',
                gap: 8,
            }}>
              {saving ? 'Saving...' : 'Start using HomePilot'}
              {!saving && <Sparkles size={16}/>}
            </button>
          </div>
        </div>)}

      {/* Skip link */}
      {step < 3 && (<button onClick={handleFinish} style={{
                background: 'none',
                border: 'none',
                color: '#475569',
                fontSize: 13,
                cursor: 'pointer',
                marginTop: 16,
            }}>
          Skip for now
        </button>)}
    </div>);
}