'use client'

import { useState } from 'react'
import { motion, AnimatePresence } from 'motion/react'
import { Pencil, CreditCard, Lightbulb, Check, ArrowRight, Sparkles } from 'lucide-react'
import { Button } from '@/components/ui/button'
import { useLanguage } from '@/lib/i18n'

interface Props {
  onDone: () => void
  onTry: (href: string) => void
}

const ACTIONS = [
  { icon: Pencil,     color: 'text-violet-500', bg: 'bg-violet-500/10', key: 'write',      href: '/home' },
  { icon: CreditCard, color: 'text-blue-500',   bg: 'bg-blue-500/10',   key: 'flashcards', href: '/revision' },
  { icon: Lightbulb,  color: 'text-amber-500',  bg: 'bg-amber-500/10',  key: 'brainstorm', href: '/brainstorm' },
]

export function OnboardingStepFeatures({ onDone, onTry }: Props) {
  const { t } = useLanguage()
  const [checked, setChecked] = useState<Set<string>>(new Set())

  function handleTry(key: string, href: string) {
    setChecked(prev => new Set([...prev, key]))
    onTry(href)
  }

  const allChecked = checked.size === ACTIONS.length

  return (
    <motion.div
      initial={{ opacity: 0, y: 16 }}
      animate={{ opacity: 1, y: 0 }}
      exit={{ opacity: 0, y: -16 }}
      className="flex flex-col items-center gap-5 w-full"
    >
      <motion.div
        initial={{ scale: 0.7, opacity: 0 }}
        animate={{ scale: 1, opacity: 1 }}
        transition={{ delay: 0.1, type: 'spring', stiffness: 200 }}
        className="flex h-20 w-20 items-center justify-center rounded-2xl bg-amber-500/10 text-amber-500"
      >
        <Sparkles className="h-10 w-10" />
      </motion.div>

      <div className="space-y-1 text-center">
        <h2 className="text-2xl font-bold tracking-tight text-foreground">
          {t('onboarding.step_features_title')}
        </h2>
        <p className="text-sm text-muted-foreground max-w-xs mx-auto">
          {t('onboarding.step_features_subtitle')}
        </p>
      </div>

      <div className="flex flex-col gap-2.5 w-full">
        {ACTIONS.map(({ icon: Icon, color, bg, key, href }, i) => {
          const done = checked.has(key)
          return (
            <motion.div
              key={key}
              initial={{ opacity: 0, x: -12 }}
              animate={{ opacity: 1, x: 0 }}
              transition={{ delay: 0.08 + i * 0.08 }}
              className={`flex items-center gap-3 rounded-xl border p-3 transition-all ${
                done ? 'border-emerald-500/30 bg-emerald-500/5' : 'border-border bg-muted/10 hover:border-border/80'
              }`}
            >
              {/* Checkmark */}
              <span className={`shrink-0 flex h-5 w-5 items-center justify-center rounded-full border-2 transition-colors ${
                done ? 'border-emerald-500 bg-emerald-500' : 'border-border'
              }`}>
                <AnimatePresence>
                  {done && (
                    <motion.span initial={{ scale: 0 }} animate={{ scale: 1 }} exit={{ scale: 0 }}>
                      <Check className="h-3 w-3 text-white" />
                    </motion.span>
                  )}
                </AnimatePresence>
              </span>

              {/* Icon */}
              <span className={`flex h-8 w-8 shrink-0 items-center justify-center rounded-lg ${bg} ${color}`}>
                <Icon className="h-4 w-4" />
              </span>

              {/* Text */}
              <div className="flex-1 min-w-0">
                <p className={`text-sm font-medium leading-tight ${done ? 'text-muted-foreground' : 'text-foreground'}`}>
                  {t(`onboarding.action_${key}_title`)}
                </p>
                <p className="text-xs text-muted-foreground leading-tight mt-0.5">
                  {t(`onboarding.action_${key}_desc`)}
                </p>
              </div>

              {/* Essayer — minimise wizard + navigue */}
              <button
                onClick={() => handleTry(key, href)}
                className={`shrink-0 flex items-center gap-1 text-xs font-medium px-2.5 py-1.5 rounded-lg transition-opacity ${color} ${bg} ${done ? 'opacity-40' : 'hover:opacity-80'}`}
              >
                {done ? t('onboarding.action_done') : t('onboarding.action_try')}
                {!done && <ArrowRight className="h-3 w-3" />}
              </button>
            </motion.div>
          )
        })}
      </div>

      <Button onClick={onDone} size="lg" className="w-full gap-2 mt-1">
        {allChecked ? t('onboarding.step_features_cta_all') : t('onboarding.step_features_cta')}
        <ArrowRight className="h-4 w-4" />
      </Button>
    </motion.div>
  )
}