// * Packages
import { ReactNode, useCallback, useEffect, useState } from "react";
import { FileCheck, RefreshCwIcon, Trash, UploadIcon } from "lucide-react";
import { ErrorCode, FileWithPath, useDropzone } from "react-dropzone";
import "react-image-crop/dist/ReactCrop.css";
import { usePage } from "@inertiajs/react";
// * Components shadcn
import { Label } from "@/components/ui/label";
import { Button } from "@/components/ui/button";
// * Other
import InputError from "@/back/Components/InputError";
import ImageCropper from "@/back/Components/Inputs/ImageCropper";
import BtnOptionnalLinkWithTooltip from "@/back/Components/BtnOptionnalLinkWithTooltip";
import useTrans from "@/hooks/use-translations";
import str from "@/hooks/use-string";
import { useToast } from "@/hooks/use-toast";
import { AppEnv } from "@/types/global";
import { cn, GetTranslation } from "@/lib/utils";

type FileWithPreview = FileWithPath & {
  preview: string;
};

type FileValidation = {
  validationRules?: {
    width: string | null;
    height: string | null;
  } | null;
  maxFileSize: string | null;
  allowedFormats: string | null;
  inputType?: "image" | "file";
};

/* eslint-disable no-unused-vars, @typescript-eslint/no-unused-vars */
type CompleteInputFileProps = FileValidation & {
  name: string;
  value?: string | File | null;
  /** Original data is the data directly from the model, not in the form state */
  originalData?: string | undefined;
  /** Add custom event when refresh to the originalData */
  onRefreshFile?: () => void;
  label?: ReactNode | string;
  required?: boolean;
  fileName?: string;
  hasRefreshBtn?: boolean;
  parentErrors?: Record<string, string> | null;
  setData: (name: string, value: File | string | null) => void;
  reset: (name?: string) => void;
  hasFile?: (hasFile: boolean) => void;
};
/* eslint-enable no-unused-vars, @typescript-eslint/no-unused-vars */

export default function CompleteInputFile(props: CompleteInputFileProps) {
  const {
    value,
    setData,
    originalData,
    name = "defaultName",
    onRefreshFile,
    label = "defaultLabel",
    required = false,
    maxFileSize,
    validationRules,
    allowedFormats,
    reset,
    inputType = "image",
    fileName = "image",
    hasRefreshBtn = true,
    hasFile,
    parentErrors,
  } = props;
  const { toast } = useToast();
  const { errors } = usePage().props;
  const { url } = usePage().props.appEnv as AppEnv;
  const [isReset, setIsReset] = useState<boolean>(false);
  const [isDialogOpen, setDialogOpen] = useState(false);
  const [accept, setAccept] = useState<Record<string, Array<string>>>({
    "image/*": [],
  });
  const [extensions, setExtensions] = useState<string>();

  const finalFileName = `${fileName}.png`;
  const isRefreshDisabled = value != null && typeof value === "string";
  const localErrors = parentErrors ?? errors;

  const localValidationRules = {
    width: validationRules?.width ? parseInt(validationRules.width, 10) : 250,
    height: validationRules?.height
      ? parseInt(validationRules?.height, 10)
      : 250,
  };

  const localMaxFileSize = maxFileSize
    ? parseInt(maxFileSize, 10) * 1024
    : 50000;

  /**
   * Get the fileName from the path given by the database value
   * @param path string|null
   * @return string|null
   */
  const getFileNameFromPath = (path?: string | null): string | null => {
    if (!path || typeof path !== "string") return null;
    const cleanPath = path.replace(/\/+$/, "");
    const segments = cleanPath.split("/");
    const last = segments[segments.length - 1] || "";
    return last || null;
  };

  const transValueIntoFile = (localData: string | undefined | null) => {
    if (localData) {
      const currentFileName = getFileNameFromPath(localData);
      return {
        preview: `${url}/${localData}`,
        name: currentFileName ?? "",
      } as FileWithPreview;
    }
    return null;
  };

  const [selectedFile, setSelectedFile] = useState<FileWithPreview | null>(
    () => {
      // When there is an image selected but not stored yet.
      if (value instanceof File) {
        return Object.assign(value, {
          preview: URL.createObjectURL(value),
        });
      }

      // When there is already an image stored.
      return transValueIntoFile(value);
    },
  );

  // Fonction utilitaire pour formater la taille de fichier
  const formatFileSize = (bytes: number): string => {
    if (bytes === 0) return "0 Bytes";
    const k = 1024;
    const sizes = ["Bytes", "KB", "MB", "GB"];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    const currentSize = sizes[i];
    const currentBytes = parseFloat((bytes / k ** i).toFixed(2));
    return `${currentBytes} ${currentSize}`;
  };

  // Translations
  const transSelectImgZone = useTrans(
    inputType === "file"
      ? "uwil-backend::back.image_cropper.select_file_zone"
      : "uwil-backend::back.image_cropper.select_img_zone",
  );
  const transValidationAllFormats = str(
    useTrans("uwil-backend::back.image_cropper.validation.all_formats"),
  )
    .ucFirst()
    .value();
  const transCropperFileUploaded = useTrans(
    "uwil-backend::back.image_cropper.state_file_uploaded",
  );
  const transCancel = useTrans("uwil-backend::back.cancel");
  const transRulesWeight = useTrans(
    "uwil-backend::back.image_cropper.validation.rules_weight",
    {
      params: {
        size: formatFileSize(localMaxFileSize).toString(),
      },
    },
  );
  const transRefresh = useTrans(
    "uwil-backend::back.image_cropper.refresh_original",
  );
  const getTransValidationAllowedFormats = (targetExtensions: string) => {
    return str(
      GetTranslation(
        "uwil-backend::back.image_cropper.validation.allowed_formats",
        {
          params: {
            formats: targetExtensions,
          },
        },
      ),
    )
      .ucFirst()
      .value();
  };

  const buildDropzoneAccept = (): Record<string, string[]> => {
    if (!allowedFormats) return {};

    const currentExtensions = allowedFormats.split(",");
    setExtensions(allowedFormats);
    const mimeMap: Record<string, string> = {
      jpg: "image/jpeg",
      jpeg: "image/jpeg",
      png: "image/png",
      gif: "image/gif",
      pdf: "application/pdf",
      svg: "image/svg+xml",
      webp: "image/webp",
    };

    const result: Record<string, Set<string>> = {};

    currentExtensions.forEach((ext) => {
      const cleanExt = ext.trim().toLowerCase();
      const mime = mimeMap[cleanExt];
      if (mime) {
        if (!result[mime]) {
          result[mime] = new Set();
        }
        result[mime].add(`.${cleanExt}`);
      }
    });

    // Convert Set to Array for React Dropzone
    const currentAccept: Record<string, string[]> = {};
    Object.entries(result).forEach(([mime, extSet]) => {
      currentAccept[mime] = Array.from(extSet);
    });
    setAccept(currentAccept);
    return currentAccept;
  };

  useEffect(() => {
    buildDropzoneAccept();
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  useEffect(() => {
    hasFile?.(!!selectedFile);
  }, [selectedFile, hasFile]);

  // This error message for the useDropZone can not be used directly in the hook because or react hook error,
  // they have to be used as they actually are.
  const dropErrorMessages = {
    noFile: str(useTrans("uwil-backend::back.image_cropper.toast.no_file"))
      .ucFirst()
      .value(),
    tooLarge: str(
      useTrans("uwil-backend::back.image_cropper.toast.too_big", {
        params: {
          maxSize: formatFileSize(localMaxFileSize),
        },
      }),
    )
      .ucFirst()
      .value(),
    forbidden: str(
      useTrans("uwil-backend::back.image_cropper.toast.forbidden_file"),
    )
      .ucFirst()
      .value(),
    tooMany: str(useTrans("uwil-backend::back.image_cropper.toast.too_many"))
      .ucFirst()
      .value(),
    default: str(
      useTrans("uwil-backend::back.image_cropper.toast.defaultError"),
    )
      .ucFirst()
      .value(),
  };

  const onDrop = useCallback(
    (acceptedFiles: FileWithPath[]) => {
      const file = acceptedFiles[0];
      if (!file) {
        toast({
          title: "Oups !",
          description: dropErrorMessages.noFile,
        });
        return;
      }
      const fileWithPreview = Object.assign(file, {
        preview: URL.createObjectURL(file),
      });

      setSelectedFile(fileWithPreview);
      if (inputType === "file") {
        setData(name, file);
      }
      setDialogOpen(true);
    },
    // eslint-disable-next-line react-hooks/exhaustive-deps
    [maxFileSize, formatFileSize],
  );

  const { getRootProps, getInputProps } = useDropzone({
    onDrop,
    accept,
    multiple: false,
    maxSize: localMaxFileSize,
    onDropRejected: (fileRejections) => {
      const rejection = fileRejections[0];
      const rejectionCode = rejection?.errors?.[0]?.code;
      if (rejectionCode === ErrorCode.FileTooLarge) {
        toast({
          title: "Oups !",
          description: `${dropErrorMessages.tooLarge} (${formatFileSize(rejection.file.size)}).`,
        });
      } else if (rejectionCode === ErrorCode.FileInvalidType) {
        toast({
          title: "Oups !",
          description: dropErrorMessages.forbidden,
        });
      } else if (rejectionCode === ErrorCode.TooManyFiles) {
        toast({
          title: "Oups !",
          description: dropErrorMessages.tooMany,
        });
      } else {
        toast({
          title: "Oups !",
          description: dropErrorMessages.default,
        });
      }
    },
  });

  return (
    <div className="flex flex-col gap-1.5 w-full">
      <div className="w-full flex gap-1 items-end">
        <div className="w-full">
          <Label htmlFor={name}>
            {label}
            {required && " *"}
          </Label>
          {selectedFile ? (
            <div className="relative">
              {inputType === "image" && (
                <ImageCropper
                  dialogOpen={isDialogOpen}
                  value={value}
                  reset={reset}
                  setData={setData}
                  setDialogOpen={setDialogOpen}
                  selectedFile={selectedFile}
                  validationRules={{
                    width: localValidationRules.width,
                    height: localValidationRules.height,
                  }}
                  name={name}
                  url={url}
                  isReset={isReset}
                  setIsReset={setIsReset}
                  finalFileName={finalFileName}
                />
              )}
              {inputType === "file" && (
                <div
                  className={cn(
                    "text-sm flex justify-center border border-dashed overflow-hidden whitespace-normal [&_svg]:!size-auto [&_svg]:!shrink text-muted-foreground w-full h-36",
                  )}
                >
                  <div className="flex flex-col justify-center items-center">
                    <FileCheck />
                    <p className="text-center break-normal w-full mt-2">
                      {str(transCropperFileUploaded).ucFirst().value()}
                    </p>
                    <small>{selectedFile.name}</small>
                  </div>
                </div>
              )}
              <BtnOptionnalLinkWithTooltip
                className="absolute top-2 right-2"
                variant="destructive"
                content={<Trash className="w-4 h-4 m-auto" />}
                onClick={() => {
                  setSelectedFile(null);
                  setData(name, null);
                }}
                tooltipContent={str(transCancel).ucFirst().value()}
              />
            </div>
          ) : (
            <Button
              variant="ghost"
              type="button"
              className={cn(
                "flex border border-dashed overflow-hidden whitespace-normal [&_svg]:!pointer-events-auto [&_svg]:!size-auto [&_svg]:!shrink text-muted-foreground w-full h-36",
                { "border-destructive": localErrors[name] },
              )}
              // eslint-disable-next-line react/jsx-props-no-spreading
              {...getRootProps()}
            >
              {/* eslint-disable-next-line react/jsx-props-no-spreading */}
              <input name={name} {...getInputProps()} />
              <div className="flex flex-col justify-center items-center">
                <UploadIcon />
                <p className="text-center break-normal w-full mt-2">
                  {transSelectImgZone}
                </p>
                <small>
                  {extensions
                    ? getTransValidationAllowedFormats(extensions)
                    : transValidationAllFormats}
                  . {str(transRulesWeight).ucFirst().value()}
                </small>
              </div>
            </Button>
          )}
        </div>

        {hasRefreshBtn && originalData && (
          <BtnOptionnalLinkWithTooltip
            disabled={isRefreshDisabled}
            className="h-36"
            variant="secondary"
            onClick={() => {
              setData(name, originalData);
              setSelectedFile(transValueIntoFile(originalData));
              if (onRefreshFile) {
                onRefreshFile();
              }
            }}
            content={<RefreshCwIcon />}
            tooltipContent={str(transRefresh).ucFirst().value()}
          />
        )}
      </div>
      <InputError message={localErrors[name]} />
    </div>
  );
}