"use client"

import { useState } from "react"
import { FileDown } from "lucide-react"
import { toast } from "sonner"

interface ReceiptProps {
  payment: {
    id: string
    amount: number
    due_date: string
    paid_date: string | null
    payment_method: string | null
    status: string
  }
  tenant: {
    first_name: string
    last_name: string
    email?: string | null
  }
  property: { name: string }
  unit?: { unit_number: string } | null
}

export function RentReceiptButton({ payment, tenant, property, unit }: ReceiptProps) {
  const [loading, setLoading] = useState(false)

  async function downloadReceipt() {
    if (payment.status !== "paid") {
      toast.error("Receipt only available for paid payments")
      return
    }

    setLoading(true)
    try {
      const { jsPDF } = await import("jspdf")
      const doc = new jsPDF({ unit: "pt", format: "a4" })

      const pageW = doc.internal.pageSize.getWidth()
      const margin = 48

      // Header background
      doc.setFillColor(22, 22, 31)
      doc.rect(0, 0, pageW, 100, "F")

      // Title
      doc.setTextColor(255, 255, 255)
      doc.setFontSize(22)
      doc.setFont("helvetica", "bold")
      doc.text("Property Management Network", margin, 44)

      doc.setFontSize(11)
      doc.setFont("helvetica", "normal")
      doc.setTextColor(160, 160, 180)
      doc.text("RENT RECEIPT", margin, 64)

      // Receipt number
      doc.setTextColor(160, 160, 180)
      doc.setFontSize(9)
      doc.text(`Receipt #${payment.id.slice(0, 8).toUpperCase()}`, pageW - margin, 44, { align: "right" })
      doc.text(new Date().toLocaleDateString("en-US", { year: "numeric", month: "long", day: "numeric" }), pageW - margin, 60, { align: "right" })

      // Divider
      doc.setDrawColor(60, 60, 80)
      doc.line(margin, 112, pageW - margin, 112)

      // Tenant & Property info
      doc.setTextColor(120, 120, 140)
      doc.setFontSize(9)
      doc.setFont("helvetica", "bold")
      doc.text("TENANT", margin, 136)
      doc.text("PROPERTY", pageW / 2, 136)

      doc.setFont("helvetica", "normal")
      doc.setTextColor(30, 30, 30)
      doc.setFontSize(11)
      doc.text(`${tenant.first_name} ${tenant.last_name}`, margin, 154)
      doc.text(property.name, pageW / 2, 154)

      if (tenant.email) {
        doc.setFontSize(9)
        doc.setTextColor(120, 120, 140)
        doc.text(tenant.email, margin, 170)
      }
      if (unit) {
        doc.setFontSize(9)
        doc.setTextColor(120, 120, 140)
        doc.text(`Unit ${unit.unit_number}`, pageW / 2, 170)
      }

      // Payment box
      doc.setFillColor(245, 245, 250)
      doc.roundedRect(margin, 200, pageW - margin * 2, 140, 8, 8, "F")

      doc.setTextColor(30, 30, 30)
      doc.setFontSize(13)
      doc.setFont("helvetica", "bold")
      doc.text("Payment Details", margin + 20, 228)

      const rows = [
        ["Amount Paid",     `$${Number(payment.amount).toFixed(2)}`],
        ["Due Date",        payment.due_date],
        ["Paid Date",       payment.paid_date ?? "—"],
        ["Payment Method",  payment.payment_method ?? "—"],
        ["Status",          "PAID"],
      ]

      doc.setFont("helvetica", "normal")
      doc.setFontSize(10)
      rows.forEach(([label, value], i) => {
        const y = 252 + i * 18
        doc.setTextColor(100, 100, 120)
        doc.text(label, margin + 20, y)
        doc.setTextColor(30, 30, 30)
        doc.text(value, pageW - margin - 20, y, { align: "right" })
      })

      // Paid stamp
      doc.setTextColor(34, 197, 94)
      doc.setFontSize(32)
      doc.setFont("helvetica", "bold")
      doc.text("PAID", pageW - margin - 20, 290, { align: "right" })

      // Footer
      doc.setFont("helvetica", "normal")
      doc.setFontSize(8)
      doc.setTextColor(160, 160, 180)
      doc.text("This receipt was generated by Property Management Network. Please keep for your records.", margin, 780)
      doc.text("propertymanagement.network", pageW - margin, 780, { align: "right" })

      const filename = `receipt-${tenant.last_name.toLowerCase()}-${payment.due_date}.pdf`
      doc.save(filename)
      toast.success("Receipt downloaded")
    } catch {
      toast.error("Failed to generate receipt")
    } finally {
      setLoading(false)
    }
  }

  if (payment.status !== "paid") return null

  return (
    <button
      onClick={downloadReceipt}
      disabled={loading}
      title="Download Receipt"
      className="flex items-center gap-1.5 rounded-lg border border-white/10 px-2.5 py-1.5 text-xs text-white/60 hover:border-indigo-500/30 hover:text-indigo-400 transition disabled:opacity-40"
    >
      <FileDown className="h-3.5 w-3.5" />
      {loading ? "…" : "Receipt"}
    </button>
  )
}