"use client";

import { useState, useRef, ChangeEvent, useEffect } from "react";
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import { Camera, Upload, X, Loader2 } from "lucide-react";
import { cn } from "@/lib/utils";
import { useProfile } from "@/hooks/use-profile";

interface ProfilePictureUploadProps {
  initialImage?: string;
  onImageChange?: (file: File | null, imageUrl: string | null) => void;
  fallbackText?: string;
  size?: "sm" | "md" | "lg" | "xl";
  className?: string;
  disabled?: boolean;
  useDatabase?: boolean; // Nova prop para usar ou não o banco de dados
}

const sizeClasses = {
  sm: "w-16 h-16",
  md: "w-24 h-24",
  lg: "w-32 h-32",
  xl: "w-40 h-40",
};

export function ProfilePictureUpload({
  initialImage,
  onImageChange,
  fallbackText = "U",
  size = "lg",
  className,
  disabled = false,
  useDatabase = true,
}: ProfilePictureUploadProps) {
  const [selectedImage, setSelectedImage] = useState<string | null>(
    initialImage || null
  );
  const [isHovering, setIsHovering] = useState(false);
  const [isUploading, setIsUploading] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);

  // Usar o hook apenas se useDatabase for true
  const { profileImage, saveProfileImage, removeProfileImage, isLoading } =
    useDatabase
      ? useProfile()
      : {
          profileImage: null,
          saveProfileImage: async () => "",
          removeProfileImage: () => {},
          isLoading: false,
        };

  // Sincronizar com a imagem do banco de dados
  useEffect(() => {
    if (useDatabase && profileImage && !selectedImage) {
      setSelectedImage(profileImage);
    }
  }, [profileImage, selectedImage, useDatabase]);

  const handleImageChange = async (event: ChangeEvent<HTMLInputElement>) => {
    const file = event.target.files?.[0];

    if (file) {
      // Validar tipo de arquivo
      const validTypes = ["image/jpeg", "image/png", "image/gif", "image/webp"];
      if (!validTypes.includes(file.type)) {
        alert(
          "Por favor, selecione um arquivo de imagem válido (JPG, PNG, GIF ou WebP)"
        );
        return;
      }

      // Validar tamanho do arquivo (máximo 2MB)
      const maxSize = 2 * 1024 * 1024; // 2MB em bytes
      if (file.size > maxSize) {
        alert("O arquivo deve ter no máximo 2MB");
        return;
      }

      setIsUploading(true);

      try {
        let imageUrl: string;

        if (useDatabase) {
          // Salvar no banco de dados local
          imageUrl = await saveProfileImage(file);
        } else {
          // Apenas criar URL local
          imageUrl = URL.createObjectURL(file);
        }

        setSelectedImage(imageUrl);

        // Chamar callback se fornecido
        onImageChange?.(file, imageUrl);
      } catch (error) {
        console.error("Erro ao processar imagem:", error);
        alert("Erro ao salvar a imagem. Tente novamente.");
      } finally {
        setIsUploading(false);
      }
    }
  };

  const handleClick = () => {
    if (!disabled && !isUploading) {
      fileInputRef.current?.click();
    }
  };

  const handleRemoveImage = async (e: React.MouseEvent) => {
    e.stopPropagation();

    if (useDatabase) {
      removeProfileImage();
    }

    setSelectedImage(null);
    onImageChange?.(null, null);

    // Limpar o input
    if (fileInputRef.current) {
      fileInputRef.current.value = "";
    }
  };

  const isDisabled = disabled || isUploading || (useDatabase && isLoading);

  return (
    <Card className={cn("w-fit", className)}>
      <CardContent className="p-6">
        <div className="flex flex-col items-center space-y-4">
          <div className="text-sm font-medium text-center">Profile Photo</div>

          <div
            className={cn(
              "relative cursor-pointer transition-all duration-200",
              sizeClasses[size],
              isDisabled && "cursor-not-allowed opacity-50"
            )}
            onMouseEnter={() => !isDisabled && setIsHovering(true)}
            onMouseLeave={() => setIsHovering(false)}
            onClick={handleClick}
          >
            <Avatar
              className={cn(
                "w-full h-full border-2 border-dashed border-muted-foreground/20",
                {
                  "border-primary/50": isHovering && !isDisabled,
                }
              )}
            >
              <AvatarImage
                src={selectedImage || undefined}
                alt="Foto de perfil"
              />
              <AvatarFallback className="text-lg font-semibold bg-muted">
                {isLoading || isUploading ? (
                  <Loader2 className="w-6 h-6 animate-spin" />
                ) : selectedImage ? null : (
                  fallbackText
                )}
              </AvatarFallback>
            </Avatar>

            {/* Overlay com ícone */}
            <div
              className={cn(
                "absolute inset-0 flex items-center justify-center bg-black/50 rounded-full opacity-0 transition-opacity duration-200",
                isHovering && !isDisabled && "opacity-100"
              )}
            >
              {isUploading ? (
                <Loader2 className="w-6 h-6 text-white animate-spin" />
              ) : (
                <Camera className="w-6 h-6 text-white" />
              )}
            </div>

            {/* Botão de remover imagem */}
            {selectedImage && !isDisabled && (
              <Button
                size="sm"
                variant="destructive"
                className="absolute -top-2 -right-2 w-6 h-6 rounded-full p-0"
                onClick={handleRemoveImage}
              >
                <X className="w-3 h-3" />
              </Button>
            )}
          </div>

          <div className="text-center">
            <Button
              variant="outline"
              size="sm"
              onClick={handleClick}
              disabled={isDisabled}
              className="mb-2"
            >
              {isUploading ? (
                <Loader2 className="w-4 h-4 mr-2 animate-spin" />
              ) : (
                <Upload className="w-4 h-4 mr-2" />
              )}
              {selectedImage ? "Alterar foto" : "Adicionar foto"}
            </Button>
            <p className="text-xs text-muted-foreground">
              JPG, PNG ou GIF. Máximo 2MB.
            </p>
            {useDatabase && (
              <p className="text-xs text-green-600 mt-1">
                💾 Salvando automaticamente
              </p>
            )}
          </div>

          {/* Input file oculto */}
          <input
            ref={fileInputRef}
            type="file"
            accept="image/jpeg,image/png,image/gif,image/webp"
            onChange={handleImageChange}
            className="hidden"
            disabled={isDisabled}
          />
        </div>
      </CardContent>
    </Card>
  );
}