import LinkIcon from "@mui/icons-material/Link";
import UploadIcon from "@mui/icons-material/Upload";
import { Button } from "@mui/material";
import React from "react";
import { Area } from "react-easy-crop";
import { ServerApi } from "../../api/ServerApi";
import { ImageCropperDialog } from "../../dialogs/ImageCropperDialog";
import { useAlert } from "../../hooks/context_providers/AlertDialogProvider";
import getCroppedImg from "../../utils/crop_image";
import { isDebug } from "../../utils/debug_utils";
import { selectFileToUpload } from "../../utils/files_utils";

export function UploadPhotoButton(p: {
  label: string;
  onPhotoSelected: (b: Blob) => Promise<void>;
  aspect?: number;
}): React.ReactElement {
  const [processing, setProcessing] = React.useState(false);
  const [imageBlob, setImageBlob] = React.useState<Blob>();
  const [imageURL, setImageURL] = React.useState<string>();
  const alert = useAlert();

  const uploadPhoto = async () => {
    try {
      const file = await selectFileToUpload({
        allowedTypes: ServerApi.Config.constraints.photo_allowed_types,
        maxSize: ServerApi.Config.constraints.photo_max_size,
      });

      if (file === null) return;

      const tempURL = URL.createObjectURL(file);

      setImageBlob(file);
      setImageURL(tempURL);
    } catch (e) {
      console.error(e);
      alert(`Échec de l'envoi de l'image ! (${e})`);
    }
  };

  const uploadPhotoFromURL = async () => {
    const URL = prompt("Image URL ?");
    if (URL === null || URL.length === 0) return;
    setImageURL(URL);
  };

  const cancelCrop = () => {
    setImageURL(undefined);
  };

  const submitCrop = async (a: Area | undefined) => {
    setProcessing(true);
    try {
      let blob = imageBlob!;

      if (a) {
        blob = await getCroppedImg(imageURL!, a!);
      }

      await p.onPhotoSelected(blob);

      setImageBlob(undefined);
      setImageURL(undefined);
    } catch (e) {
      console.error(e);
      alert("Echec du traitement de la photo !");
    }

    setProcessing(false);
  };

  return (
    <>
      {/* Upload button */}
      <Button
        onClick={uploadPhoto}
        variant="outlined"
        startIcon={<UploadIcon />}
      >
        {p.label}
      </Button>
      {/* Upload button (from URL) */}{" "}
      {isDebug() && (
        <Button
          onClick={uploadPhotoFromURL}
          variant="outlined"
          startIcon={<LinkIcon />}
        >
          {p.label} from URL
        </Button>
      )}{" "}
      {/* Crop image dialog */}
      {imageURL && (
        <ImageCropperDialog
          processing={processing}
          src={imageURL!}
          onCancel={cancelCrop}
          onSubmit={submitCrop}
          aspect={p.aspect}
        />
      )}
    </>
  );
}