"use client"

import { useState } from "react"
import { motion } from "framer-motion"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"

interface StatusData {
  name: string
  value: number
  color: string
}

interface LeadStatusChartProps {
  data: StatusData[]
}

function polar(cx: number, cy: number, r: number, deg: number) {
  const rad = ((deg - 90) * Math.PI) / 180
  return { x: cx + r * Math.cos(rad), y: cy + r * Math.sin(rad) }
}

function arcPath(cx: number, cy: number, oR: number, iR: number, start: number, end: number) {
  const gap = 3
  const s = start + gap / 2
  const e = end - gap / 2
  const o1 = polar(cx, cy, oR, s)
  const o2 = polar(cx, cy, oR, e)
  const i1 = polar(cx, cy, iR, e)
  const i2 = polar(cx, cy, iR, s)
  const lg = e - s > 180 ? 1 : 0
  return `M${o1.x} ${o1.y} A${oR} ${oR} 0 ${lg} 1 ${o2.x} ${o2.y} L${i1.x} ${i1.y} A${iR} ${iR} 0 ${lg} 0 ${i2.x} ${i2.y}Z`
}

export function LeadStatusChart({ data }: LeadStatusChartProps) {
  const [hov, setHov] = useState<number | null>(null)

  const total = data.reduce((s, d) => s + d.value, 0)

  let cum = 0
  const segs = data.map((d) => {
    const start = cum
    const deg = (d.value / total) * 360
    cum += deg
    return { ...d, start, end: cum, deg, pct: Math.round((d.value / total) * 100) }
  })

  const active = hov !== null ? segs[hov] : null

  return (
    <motion.div
      initial={{ opacity: 0, y: 20 }}
      animate={{ opacity: 1, y: 0 }}
      transition={{ duration: 0.3, delay: 0.2 }}
      className="h-full"
    >
      <Card className="h-full">
        <CardHeader>
          <CardTitle>Lead Status</CardTitle>
        </CardHeader>
        <CardContent className="flex flex-1 flex-col">
          <div className="flex flex-1 flex-col items-center justify-center">
            {/* Donut */}
            <svg width="100%" height="100%" viewBox="0 0 320 320" className="max-h-full overflow-visible" style={{ maxWidth: "280px" }}>
              <defs>
                {segs.map((s, i) => (
                  <radialGradient key={i} id={`chart-grad-${i}`} cx="50%" cy="50%" r="50%">
                    <stop offset="0%" stopColor={s.color} stopOpacity="1" />
                    <stop offset="100%" stopColor={s.color} stopOpacity="0.75" />
                  </radialGradient>
                ))}
              </defs>

              {/* Background ring */}
              <circle cx="160" cy="160" r="105" fill="none" stroke="hsl(var(--muted))" strokeWidth="52" />

              {/* Segments */}
              {segs.map((s, i) => {
                const isH = hov === i
                const oR = isH ? 137 : 130
                const iR = isH ? 73 : 80
                return (
                  <path
                    key={i}
                    d={arcPath(160, 160, oR, iR, s.start, s.end)}
                    fill={`url(#chart-grad-${i})`}
                    opacity={hov !== null && !isH ? 0.3 : 1}
                    style={{
                      cursor: "pointer",
                      transition: "all 0.22s cubic-bezier(.4,0,.2,1)",
                      filter: isH ? `drop-shadow(0 0 10px ${s.color}99)` : "none",
                    }}
                    onMouseEnter={() => setHov(i)}
                    onMouseLeave={() => setHov(null)}
                  />
                )
              })}

              {/* Center circle */}
              <circle cx="160" cy="160" r="66" fill="hsl(var(--card))" />
              <circle cx="160" cy="160" r="66" fill="none" stroke="hsl(var(--border))" strokeWidth="1" />

              {/* Center text */}
              {active ? (
                <>
                  <circle cx="160" cy="160" r="66" fill={active.color + "15"} />
                  <text x="160" y="148" textAnchor="middle" fill="hsl(var(--foreground))" fontSize="30" fontWeight="700" fontFamily="-apple-system,sans-serif">
                    {active.value}
                  </text>
                  <text x="160" y="166" textAnchor="middle" fill="hsl(var(--muted-foreground))" fontSize="12" fontFamily="-apple-system,sans-serif">
                    {active.name}
                  </text>
                  <text x="160" y="184" textAnchor="middle" fill={active.color} fontSize="13" fontWeight="600" fontFamily="-apple-system,sans-serif">
                    {active.pct}%
                  </text>
                </>
              ) : (
                <>
                  <text x="160" y="152" textAnchor="middle" fill="hsl(var(--foreground))" fontSize="34" fontWeight="700" fontFamily="-apple-system,sans-serif">
                    {total}
                  </text>
                  <text x="160" y="172" textAnchor="middle" fill="hsl(var(--muted-foreground))" fontSize="12" fontFamily="-apple-system,sans-serif">
                    Total Leads
                  </text>
                </>
              )}
            </svg>

            {/* Legend */}
            <div className="mt-6 grid w-full grid-cols-2 gap-2">
              {segs.map((s, i) => (
                <div
                  key={i}
                  onMouseEnter={() => setHov(i)}
                  onMouseLeave={() => setHov(null)}
                  className="flex cursor-pointer items-center gap-2.5 rounded-xl p-2.5 transition-all duration-200"
                  style={{
                    background: hov === i ? `${s.color}18` : "hsl(var(--muted) / 0.3)",
                    border: `1px solid ${hov === i ? s.color + "50" : "hsl(var(--border))"}`,
                    gridColumn: i === segs.length - 1 && segs.length % 2 !== 0 ? "1 / -1" : undefined,
                    maxWidth: i === segs.length - 1 && segs.length % 2 !== 0 ? "50%" : undefined,
                    margin: i === segs.length - 1 && segs.length % 2 !== 0 ? "0 auto" : undefined,
                    width: i === segs.length - 1 && segs.length % 2 !== 0 ? "100%" : undefined,
                  }}
                >
                  <div
                    className="h-2.5 w-2.5 shrink-0 rounded-full transition-shadow duration-200"
                    style={{
                      background: s.color,
                      boxShadow: hov === i ? `0 0 8px ${s.color}` : "none",
                    }}
                  />
                  <div className="min-w-0 flex-1">
                    <div
                      className="text-xs font-medium transition-colors duration-200"
                      style={{ color: hov === i ? "hsl(var(--foreground))" : "hsl(var(--muted-foreground))" }}
                    >
                      {s.name}
                    </div>
                    <div className="mt-0.5 text-[11px]" style={{ color: "hsl(var(--muted-foreground) / 0.7)" }}>
                      {s.value} &middot; {s.pct}%
                    </div>
                  </div>
                  <div
                    className="text-xs font-semibold transition-colors duration-200"
                    style={{ color: hov === i ? s.color : "hsl(var(--muted-foreground) / 0.5)" }}
                  >
                    {s.pct}%
                  </div>
                </div>
              ))}
            </div>
          </div>
        </CardContent>
      </Card>
    </motion.div>
  )
}