"use client"

import { useState, useRef } from "react"
import { Upload, X, File, Loader2 } from "lucide-react"

interface FileUploadProps {
  propertyId: string
  onUploaded: (doc: { id: string; name: string; file_url: string; file_type: string; file_size: number }) => void
}

export function FileUpload({ propertyId, onUploaded }: FileUploadProps) {
  const [dragging, setDragging] = useState(false)
  const [uploading, setUploading] = useState(false)
  const [error, setError] = useState("")
  const inputRef = useRef<HTMLInputElement>(null)

  async function upload(file: File) {
    setUploading(true)
    setError("")

    const fd = new FormData()
    fd.append("file", file)
    fd.append("property_id", propertyId)
    fd.append("name", file.name.replace(/\.[^/.]+$/, ""))
    fd.append("category", "general")

    const res = await fetch("/api/documents", { method: "POST", body: fd })
    const data = await res.json()
    setUploading(false)

    if (!res.ok) {
      setError(data.error ?? "Upload failed")
      return
    }

    onUploaded(data)
  }

  function handleFiles(files: FileList | null) {
    if (!files || files.length === 0) return
    upload(files[0])
  }

  return (
    <div className="space-y-2">
      <div
        onDragOver={(e) => { e.preventDefault(); setDragging(true) }}
        onDragLeave={() => setDragging(false)}
        onDrop={(e) => { e.preventDefault(); setDragging(false); handleFiles(e.dataTransfer.files) }}
        onClick={() => inputRef.current?.click()}
        className={`flex cursor-pointer flex-col items-center justify-center gap-2 rounded-xl border-2 border-dashed px-6 py-10 transition ${
          dragging ? "border-indigo-500 bg-indigo-500/5" : "border-white/10 bg-white/[0.02] hover:border-white/20"
        }`}
      >
        <input ref={inputRef} type="file" className="hidden" onChange={(e) => handleFiles(e.target.files)} />
        {uploading ? (
          <Loader2 className="h-7 w-7 animate-spin text-indigo-400" />
        ) : (
          <Upload className="h-7 w-7 text-white/30" />
        )}
        <p className="text-sm text-white/50">
          {uploading ? "Uploading..." : "Drop a file here or click to browse"}
        </p>
        <p className="text-xs text-white/30">PDF, DOC, JPG, PNG — max 20 MB</p>
      </div>
      {error && <p className="text-xs text-red-400">{error}</p>}
    </div>
  )
}
