import type { HttpResponse } from "@yaakapp-internal/models";
import { lazy, Suspense } from "react";
import { useHttpRequestBody } from "../hooks/useHttpRequestBody";
import { getMimeTypeFromContentType, languageFromContentType } from "../lib/contentType";
import { LoadingIcon } from "./core/LoadingIcon";
import { EmptyStateText } from "./EmptyStateText";
import { AudioViewer } from "./responseViewers/AudioViewer";
import { CsvViewer } from "./responseViewers/CsvViewer";
import { ImageViewer } from "./responseViewers/ImageViewer";
import { MultipartViewer } from "./responseViewers/MultipartViewer";
import { SvgViewer } from "./responseViewers/SvgViewer";
import { TextViewer } from "./responseViewers/TextViewer";
import { VideoViewer } from "./responseViewers/VideoViewer";
import { WebPageViewer } from "./responseViewers/WebPageViewer";

const PdfViewer = lazy(() =>
  import("./responseViewers/PdfViewer").then((m) => ({ default: m.PdfViewer })),
);

interface Props {
  response: HttpResponse;
}

export function RequestBodyViewer({ response }: Props) {
  return <RequestBodyViewerInner key={response.id} response={response} />;
}

function RequestBodyViewerInner({ response }: Props) {
  const { data, isLoading, error } = useHttpRequestBody(response);

  if (isLoading) {
    return (
      <EmptyStateText>
        <LoadingIcon />
      </EmptyStateText>
    );
  }

  if (error) {
    return <EmptyStateText>Error loading request body: {error.message}</EmptyStateText>;
  }

  if (data?.bodyText == null || data.bodyText.length === 0) {
    return <EmptyStateText>No request body</EmptyStateText>;
  }

  const { bodyText, body } = data;

  // Try to detect language from content-type header that was sent
  const contentTypeHeader = response.requestHeaders.find(
    (h) => h.name.toLowerCase() === "content-type",
  );
  const contentType = contentTypeHeader?.value ?? null;
  const mimeType = contentType ? getMimeTypeFromContentType(contentType).essence : null;
  const language = languageFromContentType(contentType, bodyText);

  // Route to appropriate viewer based on content type
  if (mimeType?.match(/^multipart/i)) {
    const boundary = contentType?.split("boundary=")[1] ?? "unknown";
    // Create a copy because parseMultipart may detach the buffer
    const bodyCopy = new Uint8Array(body);
    return (
      <MultipartViewer data={bodyCopy} boundary={boundary} idPrefix={`request.${response.id}`} />
    );
  }

  if (mimeType?.match(/^image\/svg/i)) {
    return <SvgViewer text={bodyText} />;
  }

  if (mimeType?.match(/^image/i)) {
    return <ImageViewer data={body.buffer} />;
  }

  if (mimeType?.match(/^audio/i)) {
    return <AudioViewer data={body} />;
  }

  if (mimeType?.match(/^video/i)) {
    return <VideoViewer data={body} />;
  }

  if (mimeType?.match(/csv|tab-separated/i)) {
    return <CsvViewer text={bodyText} />;
  }

  if (mimeType?.match(/^text\/html/i)) {
    return <WebPageViewer html={bodyText} />;
  }

  if (mimeType?.match(/pdf/i)) {
    return (
      <Suspense fallback={<LoadingIcon />}>
        <PdfViewer data={body} />
      </Suspense>
    );
  }

  return (
    <TextViewer text={bodyText} language={language} stateKey={`request.body.${response.id}`} />
  );
}