"use client"

import { useState, useEffect } from "react"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Badge } from "@/components/ui/badge"
import { Progress } from "@/components/ui/progress"
import { Flame, Star, Trophy, Zap, TrendingUp } from "lucide-react"
import { getApiUrl } from "@/lib/api-config"
import { motion } from "framer-motion"

interface LevelProgress {
    current_xp: number
    level: number
    level_name: string
    xp_for_next: number
    xp_progress: number
    progress_percent: number
    streak_days: number
}

const TIER_COLORS = {
    bronze: "bg-amber-700/20 text-amber-600 border-amber-600/30",
    silver: "bg-slate-400/20 text-slate-300 border-slate-400/30",
    gold: "bg-yellow-500/20 text-yellow-400 border-yellow-500/30",
    platinum: "bg-cyan-400/20 text-cyan-300 border-cyan-400/30",
    diamond: "bg-purple-500/20 text-purple-300 border-purple-500/30",
}

export function LevelProgressCard() {
    const [progress, setProgress] = useState<LevelProgress | null>(null)
    const [loading, setLoading] = useState(true)

    useEffect(() => {
        fetchProgress()
    }, [])

    const fetchProgress = async () => {
        const token = localStorage.getItem("token")
        if (!token) {
            setLoading(false)
            return
        }

        try {
            const res = await fetch(`${getApiUrl()}/gamification/me`, {
                headers: { Authorization: `Bearer ${token}` }
            })
            if (res.ok) {
                const data = await res.json()
                setProgress(data)
            }
        } catch (err) {
            console.error("Failed to fetch level progress", err)
        } finally {
            setLoading(false)
        }
    }

    if (loading) {
        return <div className="text-muted-foreground">Loading...</div>
    }

    if (!progress) {
        return null
    }

    return (
        <Card className="overflow-hidden">
            <CardHeader className="bg-gradient-to-r from-primary/10 via-purple-500/10 to-pink-500/10">
                <CardTitle className="flex items-center justify-between">
                    <div className="flex items-center gap-2">
                        <TrendingUp className="h-5 w-5 text-primary" />
                        Level Progress
                    </div>
                    {progress.streak_days > 0 && (
                        <Badge variant="outline" className="gap-1 bg-orange-500/10 text-orange-400 border-orange-500/30">
                            <Flame className="h-3 w-3" />
                            {progress.streak_days} day streak
                        </Badge>
                    )}
                </CardTitle>
            </CardHeader>
            <CardContent className="pt-6 space-y-4">
                {/* Level Badge */}
                <motion.div
                    initial={{ scale: 0.9, opacity: 0 }}
                    animate={{ scale: 1, opacity: 1 }}
                    className="flex items-center gap-4"
                >
                    <div className="relative">
                        <div className="w-16 h-16 rounded-full bg-gradient-to-br from-primary to-purple-600 flex items-center justify-center text-2xl font-bold text-white shadow-lg">
                            {progress.level}
                        </div>
                        <div className="absolute -bottom-1 -right-1 bg-background rounded-full p-1">
                            <Star className="h-4 w-4 text-yellow-500" />
                        </div>
                    </div>
                    <div>
                        <h3 className="text-xl font-bold">{progress.level_name}</h3>
                        <p className="text-sm text-muted-foreground">
                            {progress.current_xp.toLocaleString()} XP total
                        </p>
                    </div>
                </motion.div>

                {/* Progress Bar */}
                <div className="space-y-2">
                    <div className="flex justify-between text-sm">
                        <span className="text-muted-foreground">
                            Level {progress.level + 1}
                        </span>
                        <span className="font-mono">
                            {progress.xp_progress} / {progress.xp_for_next} XP
                        </span>
                    </div>
                    <Progress value={progress.progress_percent} className="h-3" />
                    <p className="text-xs text-muted-foreground text-center">
                        {Math.round(progress.xp_for_next - progress.xp_progress)} XP until next level
                    </p>
                </div>

                {/* XP Tips */}
                <div className="pt-4 border-t">
                    <p className="text-xs text-muted-foreground mb-2 font-medium">Earn XP by:</p>
                    <div className="grid grid-cols-2 gap-2 text-xs">
                        <div className="flex items-center gap-2">
                            <Trophy className="h-3 w-3 text-primary" />
                            <span>Rating performances</span>
                        </div>
                        <div className="flex items-center gap-2">
                            <Zap className="h-3 w-3 text-yellow-500" />
                            <span>Writing reviews</span>
                        </div>
                        <div className="flex items-center gap-2">
                            <Star className="h-3 w-3 text-purple-500" />
                            <span>Marking attendance</span>
                        </div>
                        <div className="flex items-center gap-2">
                            <Flame className="h-3 w-3 text-orange-500" />
                            <span>Daily streaks</span>
                        </div>
                    </div>
                </div>
            </CardContent>
        </Card>
    )
}