"use client"

import { TrendingUp, TrendingDown, Brain, Zap } from "lucide-react"
import { Card, CardContent } from "@/components/ui/card"
import Link from "next/link"

const DAYS = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
const BAR_HEIGHTS = [55, 70, 45, 90, 80, 60, 75] // % heights
const ACCURACY = [82, 78, 91, 88, 85, 79, 93]

export function WeeklyProgressReport() {
  const avgAccuracy = Math.round(ACCURACY.reduce((a, b) => a + b, 0) / ACCURACY.length)
  const trend = ACCURACY[ACCURACY.length - 1] - ACCURACY[0]
  const maxBar = Math.max(...BAR_HEIGHTS)

  return (
    <div className="flex flex-col h-full">
      <Card className="border-border bg-card shadow-[0_4px_24px_rgba(0,0,0,0.3)] flex-1 flex flex-col group hover:border-[#00F0FF]/30 transition-colors">
        <CardContent className="p-4 flex flex-col h-full gap-4">
          {/* Summary chips */}
          <div className="flex items-center gap-2 flex-wrap">
            <div className="flex items-center gap-1.5 text-xs font-bold px-2.5 py-1 rounded-full bg-green-500/10 text-green-500 border border-green-500/20">
              <TrendingUp size={12} />
              {avgAccuracy}% avg accuracy
            </div>
            <div className={`flex items-center gap-1.5 text-xs font-bold px-2.5 py-1 rounded-full border ${trend >= 0 ? "bg-[#00F0FF]/10 text-[#00F0FF] border-[#00F0FF]/20" : "bg-red-500/10 text-red-500 border-red-500/20"}`}>
              {trend >= 0 ? <TrendingUp size={12} /> : <TrendingDown size={12} />}
              {trend >= 0 ? "+" : ""}{trend}% vs Mon
            </div>
            <div className="flex items-center gap-1.5 text-xs font-bold px-2.5 py-1 rounded-full bg-yellow-500/10 text-yellow-500 border border-yellow-500/20">
              <Zap size={12} />
              7/7 days active
            </div>
          </div>

          {/* Bar Chart */}
          <div className="flex items-end gap-2 h-24 flex-1">
            {DAYS.map((day, i) => (
              <div key={day} className="flex flex-col items-center gap-1 flex-1">
                <div className="relative w-full flex items-end justify-center" style={{ height: "80px" }}>
                  <div
                    className={`w-full rounded-t-md transition-all duration-700 ${
                      i === 6
                        ? "bg-gradient-to-t from-[#00F0FF]/60 to-[#00F0FF]"
                        : "bg-gradient-to-t from-white/10 to-white/20"
                    }`}
                    style={{ height: `${(BAR_HEIGHTS[i] / maxBar) * 80}px` }}
                    title={`${ACCURACY[i]}% accuracy`}
                  />
                </div>
                <span className="text-xs text-muted-foreground font-bold">{day}</span>
              </div>
            ))}
          </div>

          {/* AI insight */}
          <div className="px-3 py-2.5 bg-[#00F0FF]/10 border border-[#00F0FF]/20 rounded-md text-xs text-[#00F0FF] font-medium flex items-start gap-3">
            <Brain size={16} className="shrink-0 mt-0.5" />
            <div className="flex flex-col gap-1.5">
              <span><strong className="text-white">You keep making sign errors in Thermodynamics.</strong> In your last 3 attempts, you've used the wrong sign for work done (W = -PΔV). Review the First Law of Thermodynamics — we've queued 3 practice questions for tomorrow.</span>
              <span className="text-[#00F0FF]/80">💡 <strong className="text-white">Tip:</strong> You perform best between 7-9 PM. Schedule difficult topics then.</span>
            </div>
          </div>
        </CardContent>
      </Card>
    </div>
  )
}