import type { DavPatAuth } from "@/worker/auth/basic";
import { davError, emptyResponse, methodNotAllowed } from "@/worker/dav/http";
import { normalizeFilesPath } from "@/worker/dav/paths";
import type { SubjectRow } from "@/worker/db/d1/schema";
import type { AppContext } from "@/worker/types";
import { hasFilesScope, requiresFileWrite } from "@/worker/webdav/access";
import { FILES_DAV_ALLOW, FILES_DAV_OPTIONS_HEADERS } from "@/worker/webdav/constants";
import { handleCopyMove } from "@/worker/webdav/copy-move";
import { handleDelete } from "@/worker/webdav/delete";
import { handleGetHead } from "@/worker/webdav/get-head";
import { handleLock, handleUnlock } from "@/worker/webdav/lock";
import { handleMkcol } from "@/worker/webdav/mkcol";
import { handlePropfind } from "@/worker/webdav/propfind";
import { handleProppatch } from "@/worker/webdav/proppatch";
import { handlePut } from "@/worker/webdav/put";

export { FILES_DAV_OPTIONS_HEADERS };

export async function handleWebDavFiles(c: AppContext, subject: SubjectRow, auth: DavPatAuth): Promise<Response> {
  if (
    requiresFileWrite(c.req.method)
      ? !hasFilesScope(auth.scopes, "dav:files:write")
      : !hasFilesScope(auth.scopes, "dav:files:read")
  ) {
    return davError(403, "PAT scope does not allow this method");
  }

  const path = normalizeFilesPath(new URL(c.req.url).pathname);
  if (!path.ok) return davError(path.status, path.message);

  switch (c.req.method) {
    case "OPTIONS":
      return emptyResponse(204, FILES_DAV_OPTIONS_HEADERS);
    case "PROPFIND":
      return await handlePropfind(c, subject, path);
    case "PROPPATCH":
      return await handleProppatch(c, subject, path);
    case "MKCOL":
      return await handleMkcol(c, subject, path);
    case "GET":
    case "HEAD":
      return await handleGetHead(c, subject, path);
    case "PUT":
      return await handlePut(c, subject, path);
    case "DELETE":
      return await handleDelete(c, subject, path);
    case "COPY":
    case "MOVE":
      return await handleCopyMove(c, subject, path);
    case "LOCK":
      return await handleLock(c, subject, path);
    case "UNLOCK":
      return await handleUnlock(c, subject, path);
    default:
      return methodNotAllowed(FILES_DAV_ALLOW);
  }
}