'use client';

import React from 'react';
import { Activity, AlertCircle, CheckCircle, Zap, TrendingUp } from 'lucide-react';
import { Area, AreaChart, ResponsiveContainer, Tooltip, XAxis, YAxis, CartesianGrid } from 'recharts';

interface ABVTasting {
    id: string;
    abv: number;
    tasted_at: string;
}

interface SessionABVCurveProps {
    tastings: ABVTasting[];
}

export default function SessionABVCurve({ tastings }: SessionABVCurveProps) {
    if (!tastings || tastings.length < 2) {
        return (
            <div className="p-8 bg-zinc-900 rounded-3xl border border-dashed border-zinc-800 text-center">
                <Activity size={32} className="mx-auto text-zinc-700 mb-3" />
                <p className="text-[10px] text-zinc-500 font-bold uppercase tracking-widest leading-relaxed">
                    Kurve wird ab 2 Drams berechnet
                </p>
            </div>
        );
    }

    const data = [...tastings]
        .sort((a, b) => new Date(a.tasted_at).getTime() - new Date(b.tasted_at).getTime())
        .map((t: ABVTasting, i: number) => ({
            name: `Dram ${i + 1}`,
            abv: t.abv,
            timestamp: new Date(t.tasted_at).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' }),
            id: t.id
        }));

    const hasBigJump = tastings.some((t: ABVTasting, i: number) => i > 0 && Math.abs(t.abv - tastings[i - 1].abv) > 10);
    const avgAbv = (tastings.reduce((acc: number, t: ABVTasting) => acc + t.abv, 0) / tastings.length).toFixed(1);

    return (
        <div className="bg-zinc-900 rounded-3xl p-6 border border-white/5 shadow-2xl relative group overflow-hidden">
            {/* Header */}
            <div className="flex items-center justify-between mb-8">
                <div className="flex items-center gap-3">
                    <div className="p-2 bg-orange-500/10 rounded-xl">
                        <TrendingUp size={18} className="text-orange-500" />
                    </div>
                    <div>
                        <h4 className="text-[10px] font-black text-zinc-500 uppercase tracking-widest leading-none mb-1">ABV Progression</h4>
                        <p className="text-[8px] text-zinc-600 font-bold uppercase tracking-tighter">Alcohol By Volume Intensity</p>
                    </div>
                </div>
                {hasBigJump && (
                    <div className="flex items-center gap-1.5 px-3 py-1.5 bg-red-500/10 border border-red-500/20 rounded-full">
                        <AlertCircle size={10} className="text-red-500" />
                        <span className="text-[8px] font-black text-red-500 uppercase tracking-widest">Spike Alert</span>
                    </div>
                )}
            </div>

            {/* Chart Container */}
            <div className="h-[180px] w-full -ml-4">
                <ResponsiveContainer width="100%" height="100%">
                    <AreaChart data={data}>
                        <defs>
                            <linearGradient id="abvGradient" x1="0" y1="0" x2="0" y2="1">
                                <stop offset="5%" stopColor="#ea580c" stopOpacity={0.3} />
                                <stop offset="95%" stopColor="#ea580c" stopOpacity={0} />
                            </linearGradient>
                        </defs>
                        <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="#ffffff05" />
                        <XAxis
                            dataKey="name"
                            hide
                        />
                        <YAxis
                            domain={['dataMin - 5', 'dataMax + 5']}
                            hide
                        />
                        <Tooltip
                            content={({ active, payload }) => {
                                if (active && payload && payload.length) {
                                    return (
                                        <div className="bg-zinc-950 border border-white/10 p-3 rounded-2xl shadow-2xl backdrop-blur-xl">
                                            <p className="text-[10px] font-black text-zinc-500 uppercase tracking-widest mb-1">
                                                {payload[0].payload.name} • {payload[0].payload.timestamp}
                                            </p>
                                            <p className="text-xl font-black text-white">
                                                {payload[0].value}% <span className="text-[10px] text-zinc-500">ABV</span>
                                            </p>
                                        </div>
                                    );
                                }
                                return null;
                            }}
                        />
                        <Area
                            type="monotone"
                            dataKey="abv"
                            stroke="#ea580c"
                            strokeWidth={3}
                            fillOpacity={1}
                            fill="url(#abvGradient)"
                            animationDuration={1500}
                        />
                    </AreaChart>
                </ResponsiveContainer>
            </div>

            {/* Stats Footer */}
            <div className="mt-6 grid grid-cols-2 gap-4 border-t border-white/5 pt-6">
                <div className="flex flex-col gap-1">
                    <span className="text-[9px] font-black text-zinc-500 uppercase tracking-[0.2em]">Ø Intensity</span>
                    <div className="flex items-baseline gap-1">
                        <span className="text-2xl font-black text-white tracking-tighter">{avgAbv}</span>
                        <span className="text-[10px] font-bold text-zinc-500 uppercase">%</span>
                    </div>
                </div>
                <div className="flex flex-col items-end gap-1">
                    <span className="text-[9px] font-black text-zinc-500 uppercase tracking-[0.2em]">Flow State</span>
                    <div className="flex items-center gap-2">
                        {hasBigJump ? (
                            <>
                                <Zap size={14} className="text-red-500" />
                                <span className="text-[10px] font-black uppercase tracking-widest text-red-500">Aggressive</span>
                            </>
                        ) : (
                            <>
                                <CheckCircle size={14} className="text-green-500" />
                                <span className="text-[10px] font-black uppercase tracking-widest text-green-500">Smooth</span>
                            </>
                        )}
                    </div>
                </div>
            </div>
        </div>
    );
}