Cover image upload.

"use client"

import { useState } from "react"
import {
  useFileUpload,
  type FileMetadata,
  type FileWithPreview,
} from "@/hooks/use-file-upload"
import {
  Alert,
  AlertDescription,
  AlertTitle,
} from "@/components/reui/alert"

import { cn } from "cn"
import { Button } from "@/components/ui/button"
import { IconPlaceholder } from "@/app/(create)/components/icon-placeholder"

interface CoverUploadProps {
  maxSize?: number
  accept?: string
  className?: string
  onImageChange?: (file: File | null) => void
}

export function Pattern({
  maxSize = 5 * 1024 * 1024, // 5MB default
  accept = "image/*",
  className,
  onImageChange,
}: CoverUploadProps) {
  // Default cover image
  const defaultCoverImage: FileMetadata = {
    id: "default-cover",
    name: "cover-image.jpg",
    size: 2048000,
    type: "image/jpeg",
    url: "https://picsum.photos/1000/800?grayscale&random=3",
  }

  const [coverImage, setCoverImage] = useState<FileWithPreview | null>({
    id: defaultCoverImage.id,
    file: defaultCoverImage,
    preview: defaultCoverImage.url,
  })

  const [imageLoading, setImageLoading] = useState(true)
  const [uploadProgress, setUploadProgress] = useState(0)
  const [isUploading, setIsUploading] = useState(false)
  const [uploadError, setUploadError] = useState<string | null>(null)

  const [
    { isDragging, errors },
    {
      handleDragEnter,
      handleDragLeave,
      handleDragOver,
      handleDrop,
      openFileDialog,
      getInputProps,
    },
  ] = useFileUpload({
    maxFiles: 1,
    maxSize,
    accept,
    multiple: false,
    onFilesChange: (files) => {
      if (files.length > 0) {
        setImageLoading(true)
        setIsUploading(true)
        setUploadProgress(0)
        setUploadError(null)
        setCoverImage(files[0])
        onImageChange?.(files[0].file as File)

        // Simulate upload progress
        simulateUpload()
      }
    },
  })

  // Simulate upload progress
  const simulateUpload = () => {
    const interval = setInterval(() => {
      setUploadProgress((prev) => {
        if (prev >= 100) {
          clearInterval(interval)
          setIsUploading(false)

          // Simulate occasional upload failure (10% chance)
          if (Math.random() < 0.1) {
            setUploadError("Upload failed. Please try again.")
            return 0
          }

          return 100
        }

        // Random progress increment between 5-15%
        const increment = Math.random() * 10 + 5
        return Math.min(prev + increment, 100)
      })
    }, 200)
  }

  const removeCoverImage = () => {
    setCoverImage(null)
    setImageLoading(false)
    setIsUploading(false)
    setUploadProgress(0)
    setUploadError(null)
    onImageChange?.(null)
  }

  const retryUpload = () => {
    if (coverImage) {
      setUploadError(null)
      setIsUploading(true)
      setUploadProgress(0)
      simulateUpload()
    }
  }

  const hasImage = coverImage && coverImage.preview

  return (
    <div className={cn("w-full space-y-4", className)}>
      {/* Cover Upload Area */}
      <div
        className={cn(
          "group border-border rounded-xl relative overflow-hidden border transition-all duration-200",
          isDragging
            ? "border-primary bg-primary/5 border-dashed"
            : hasImage
              ? "border-border bg-background hover:border-primary/50"
              : "border-muted-foreground/25 bg-muted/30 hover:border-primary hover:bg-primary/5 border-dashed"
        )}
        onDragEnter={handleDragEnter}
        onDragLeave={handleDragLeave}
        onDragOver={handleDragOver}
        onDrop={handleDrop}
      >
        {/* Hidden file input */}
        <input {...getInputProps()} className="sr-only" />

        {hasImage ? (
          <>
            {/* Cover Image Display */}
            <div className="relative aspect-21/9 w-full">
              {/* Loading placeholder */}
              {imageLoading && (
                <div className="bg-muted absolute inset-0 flex animate-pulse items-center justify-center">
                  <div className="text-muted-foreground flex flex-col items-center gap-2">
                    <IconPlaceholder
                      lucide="ImageIcon"
                      tabler="IconPhoto"
                      hugeicons="ImageIcon"
                      phosphor="ImageIcon"
                      remixicon="RiImageLine"
                      className="size-5"
                    />
                    <span className="text-sm">Loading image...</span>
                  </div>
                </div>
              )}

              {/* Actual image */}
              <img
                src={coverImage.preview}
                alt="Cover"
                className={cn(
                  "h-full w-full object-cover transition-opacity duration-300",
                  imageLoading ? "opacity-0" : "opacity-100"
                )}
                onLoad={() => setImageLoading(false)}
                onError={() => setImageLoading(false)}
              />

              {/* Overlay on hover */}
              <div className="absolute inset-0 bg-black/0 transition-all duration-200 group-hover:bg-black/40" />

              {/* Action buttons overlay */}
              <div className="absolute inset-0 flex items-center justify-center opacity-0 transition-opacity duration-200 group-hover:opacity-100">
                <div className="flex gap-2">
                  <Button onClick={openFileDialog} size="sm" variant="outline">
                    <IconPlaceholder
                      lucide="UploadIcon"
                      tabler="IconUpload"
                      hugeicons="Upload01Icon"
                      phosphor="UploadSimple"
                      remixicon="RiUpload2Line"
                    />
                    Change Cover
                  </Button>
                  <Button onClick={removeCoverImage} size="sm">
                    <IconPlaceholder
                      lucide="XIcon"
                      tabler="IconX"
                      hugeicons="MultiplicationSignIcon"
                      phosphor="XIcon"
                      remixicon="RiCloseLine"
                    />
                    Remove
                  </Button>
                </div>
              </div>

              {/* Upload progress */}
              {isUploading && (
                <div className="absolute inset-0 flex items-center justify-center bg-black/40">
                  <div className="relative">
                    <svg className="size-16 -rotate-90" viewBox="0 0 64 64">
                      <circle
                        cx="32"
                        cy="32"
                        r="28"
                        fill="none"
                        stroke="currentColor"
                        strokeWidth="4"
                        className="text-white/20"
                      />
                      <circle
                        cx="32"
                        cy="32"
                        r="28"
                        fill="none"
                        stroke="currentColor"
                        strokeWidth="4"
                        strokeDasharray={`${2 * Math.PI * 28}`}
                        strokeDashoffset={`${2 * Math.PI * 28 * (1 - uploadProgress / 100)}`}
                        className="text-white transition-all duration-300"
                        strokeLinecap="round"
                      />
                    </svg>
                    <div className="absolute inset-0 flex items-center justify-center">
                      <span className="text-sm font-medium text-white">
                        {Math.round(uploadProgress)}%
                      </span>
                    </div>
                  </div>
                </div>
              )}
            </div>
          </>
        ) : (
          /* Empty State */
          <div
            className="flex aspect-21/9 w-full cursor-pointer flex-col items-center justify-center gap-4 p-8 text-center"
            onClick={openFileDialog}
          >
            <div className="bg-primary/10 rounded-full p-4">
              <IconPlaceholder
                lucide="CloudUploadIcon"
                tabler="IconCloudUpload"
                hugeicons="CloudUploadIcon"
                phosphor="CloudArrowUpIcon"
                remixicon="RiUploadCloud2Line"
                className="text-primary size-8"
              />
            </div>

            <div className="space-y-2">
              <h3 className="text-lg font-semibold">Upload Cover Image</h3>
              <p className="text-muted-foreground text-sm">
                Drag and drop an image here, or click to browse
              </p>
              <p className="text-muted-foreground text-xs">
                Recommended size: 1200x514px • Max size: 5MB
              </p>
            </div>

            <Button variant="outline" size="sm">
              <IconPlaceholder
                lucide="ImageIcon"
                tabler="IconPhoto"
                hugeicons="ImageIcon"
                phosphor="ImageIcon"
                remixicon="RiImageLine"
              />
              Browse Files
            </Button>
          </div>
        )}
      </div>

      {/* Error Messages */}
      {errors.length > 0 && (
        <Alert variant="destructive" className="mt-5">
          <IconPlaceholder
            lucide="CircleAlertIcon"
            tabler="IconAlertCircle"
            hugeicons="AlertCircleIcon"
            phosphor="WarningCircleIcon"
            remixicon="RiErrorWarningLine"
          />
          <AlertTitle>File upload error(s)</AlertTitle>
          <AlertDescription>
            {errors.map((error, index) => (
              <p key={index} className="last:mb-0">
                {error}
              </p>
            ))}
          </AlertDescription>
        </Alert>
      )}

      {/* Upload Error */}
      {uploadError && (
        <Alert variant="destructive" className="mt-5">
          <IconPlaceholder
            lucide="CircleAlertIcon"
            tabler="IconAlertCircle"
            hugeicons="AlertCircleIcon"
            phosphor="WarningCircleIcon"
            remixicon="RiErrorWarningLine"
          />
          <AlertTitle>Upload failed</AlertTitle>
          <AlertDescription>
            <p>{uploadError}</p>
            <Button onClick={retryUpload} size="sm">
              Retry Upload
            </Button>
          </AlertDescription>
        </Alert>
      )}

      {/* Upload Tips */}
      <div className="bg-muted/50 rounded-lg p-4">
        <h4 className="mb-2 text-sm font-medium">Cover Image Guidelines</h4>
        <ul className="text-muted-foreground space-y-1 text-xs">
          <li>• Use high-quality images with good lighting and composition</li>
          <li>• Recommended aspect ratio: 21:9 (ultrawide) for best results</li>
          <li>• Avoid images with important content near the edges</li>
          <li>• Supported formats: JPG, PNG, WebP</li>
        </ul>
      </div>
    </div>
  )
}