'use client';

import React, { useState } from 'react';
import { Camera, Zap } from 'lucide-react';
import { motion, AnimatePresence } from 'framer-motion';
import { useSession } from '@/context/SessionContext';
import BulkScanSheet from './BulkScanSheet';

interface FloatingScannerButtonProps {
    onImageSelected: (base64Image: string) => void;
}

export default function FloatingScannerButton({ onImageSelected }: FloatingScannerButtonProps) {
    const fileInputRef = React.useRef<HTMLInputElement>(null);
    const { activeSession } = useSession();
    const [isBulkOpen, setIsBulkOpen] = useState(false);
    const [isExpanded, setIsExpanded] = useState(false);

    const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
        const file = e.target.files?.[0];
        if (!file) return;

        const reader = new FileReader();
        reader.onloadend = () => {
            const base64String = reader.result as string;
            onImageSelected(base64String);
        };
        reader.readAsDataURL(file);
    };

    const handleMainClick = () => {
        if (activeSession) {
            setIsExpanded(!isExpanded);
        } else {
            fileInputRef.current?.click();
        }
    };

    return (
        <>
            <div className="fixed bottom-8 left-1/2 -translate-x-1/2 z-50">
                <input
                    type="file"
                    ref={fileInputRef}
                    onChange={handleFileChange}
                    accept="image/*"
                    className="hidden"
                />

                {/* Expanded Options */}
                <AnimatePresence>
                    {isExpanded && activeSession && (
                        <motion.div
                            initial={{ opacity: 0, y: 20, scale: 0.8 }}
                            animate={{ opacity: 1, y: 0, scale: 1 }}
                            exit={{ opacity: 0, y: 20, scale: 0.8 }}
                            className="absolute bottom-20 left-1/2 -translate-x-1/2 flex gap-3"
                        >
                            {/* Single Scan */}
                            <motion.button
                                whileHover={{ scale: 1.05 }}
                                whileTap={{ scale: 0.95 }}
                                onClick={() => {
                                    setIsExpanded(false);
                                    fileInputRef.current?.click();
                                }}
                                className="flex flex-col items-center gap-1.5 px-4 py-3 bg-zinc-900 border border-zinc-700 rounded-2xl shadow-xl"
                            >
                                <Camera size={24} className="text-white" />
                                <span className="text-[10px] font-bold text-zinc-400 uppercase tracking-widest">Einzel</span>
                            </motion.button>

                            {/* Bulk Scan */}
                            <motion.button
                                whileHover={{ scale: 1.05 }}
                                whileTap={{ scale: 0.95 }}
                                onClick={() => {
                                    setIsExpanded(false);
                                    setIsBulkOpen(true);
                                }}
                                className="flex flex-col items-center gap-1.5 px-4 py-3 bg-orange-600 rounded-2xl shadow-xl shadow-orange-950/30"
                            >
                                <Zap size={24} className="text-white" />
                                <span className="text-[10px] font-bold text-white/80 uppercase tracking-widest">Bulk</span>
                            </motion.button>
                        </motion.div>
                    )}
                </AnimatePresence>

                {/* Main Button */}
                <motion.button
                    onClick={handleMainClick}
                    whileHover={{ scale: 1.1, translateY: -4 }}
                    whileTap={{ scale: 0.9 }}
                    initial={{ y: 100, opacity: 0 }}
                    animate={{ y: 0, opacity: 1, rotate: isExpanded ? 45 : 0 }}
                    className="relative group p-6 rounded-full bg-orange-600 text-black shadow-lg shadow-orange-950/40 hover:shadow-orange-950/60 transition-all overflow-hidden"
                >
                    {/* Shine Animation */}
                    {!isExpanded && (
                        <motion.div
                            animate={{
                                x: ['-100%', '100%'],
                            }}
                            transition={{
                                duration: 2,
                                repeat: Infinity,
                                ease: "easeInOut",
                                repeatDelay: 3
                            }}
                            className="absolute inset-0 bg-linear-to-r from-transparent via-white/40 to-transparent skew-x-12 z-0"
                        />
                    )}

                    <Camera size={32} strokeWidth={2.5} className="relative z-10" />

                    {/* Active Session Indicator */}
                    {activeSession && !isExpanded && (
                        <div className="absolute -top-1 -right-1 w-4 h-4 bg-green-500 rounded-full border-2 border-orange-600 flex items-center justify-center">
                            <Zap size={10} className="text-white" />
                        </div>
                    )}

                    {/* Pulse ring */}
                    {!isExpanded && (
                        <span className="absolute inset-0 rounded-full border-4 border-orange-600 animate-ping opacity-20" />
                    )}
                </motion.button>
            </div>

            {/* Bulk Scan Sheet */}
            {activeSession && (
                <BulkScanSheet
                    isOpen={isBulkOpen}
                    onClose={() => setIsBulkOpen(false)}
                    sessionId={activeSession.id}
                    sessionName={activeSession.name}
                    onSuccess={() => setIsBulkOpen(false)}
                />
            )}
        </>
    );
}
