{ lib
, buildPythonPackage
, fetchFromGitHub
, fetchYarnDeps
, mkYarnPackage

, taxjar
, gocardless-pro
, plaid-python
, unidecode
, pycountry
, python-youtube
, tweepy
, redisearch
, googlemaps
, python-stdnum
, frappe
}:
let
  frappe-version = "14.36.1";
  erpnext-version = "14.24.3";
in
buildPythonPackage rec {
  pname = "erpnext";
  version = erpnext-version;
  format = "flit";
  src = fetchFromGitHub {
    owner = "frappe";
    repo = pname;
    rev = "v${erpnext-version}";
    sha256 = "sha256-zovdbpTp9fTpY7kAs4J8EiPh+EjqUOtVUk+rDYMfYDk=";
  };
  buildInputs = [
    taxjar
    gocardless-pro
    plaid-python
    unidecode
    pycountry
    python-youtube
    tweepy
    redisearch
    googlemaps
    python-stdnum
    frappe
  ];

  frappe-assets = mkYarnPackage {
      pname = "frappe-assets";
      version = frappe-version;

      src = fetchFromGitHub {
        owner = "frappe";
        repo = "frappe";
        rev = "v${frappe-version}";
        hash = "sha256-eee6IS/Ep/DSDCPdnyrqBea/ag0kNnN5Id3YQMNz5js=";
      };

      packageJSON = ../frappe-package.json;
      yarnFlags = [ "--production" ];

      offlineCache = fetchYarnDeps {
        yarnLock = src + "/yarn.lock";
        hash = "sha256-PBdMUz9gJIoQaqQYbdk+xnd8CyZPmdeyz/9WznCb4Ss=";
      };

      buildPhase = ''
        runHook preBuild
        # Yarn writes cache directories etc to $HOME.
        export HOME=$PWD/yarn_home

        # The upstream build script reads sites/apps.txt to define what assets to build
        # A list of assets is written to sites/assets/assets.json
        mkdir -p apps sites/assets
        echo -e "erpnext\nfrappe\n" > sites/apps.txt
        cp -r ${src} apps/erpnext
        chmod u+rw apps/erpnext
        cp -r ${erpnext-modules}/node_modules apps/erpnext/node_modules
        chmod u+rw apps/erpnext
        #ln -s ${frappe-assets.src} apps/frappe

        yarn --offline production
        mv sites deps/

        runHook postBuild
      '';

      # Do not attempt generating a tarball
      doDist = false;

      meta = with lib; {
        description = "Assets for frappe";
        homepage = "https://github.com/frappe/frappe";
        license = licenses.mit;
        maintainers = with maintainers; [ axeman teutat3s ];
      };
  };
  erpnext-modules = mkYarnPackage {
      pname = "erpnext-modules";
      version = erpnext-version;

      src = fetchFromGitHub {
        owner = "frappe";
        repo = "erpnext";
        rev = "v${erpnext-version}";
        hash = "sha256-zovdbpTp9fTpY7kAs4J8EiPh+EjqUOtVUk+rDYMfYDk=";
      };

      packageJSON = ../erpnext-package.json;
      yarnFlags = [ "--production" ];

      offlineCache = fetchYarnDeps {
        yarnLock = ../erpnext-yarn.lock;
        hash = "sha256-Vho4BSbxcsVYExLvUaeoc3xIpbXoCUP/4jw4RwGnWGY=";
      };

      configurePhase = ''
        ln -s $node_modules node_modules
      '';

      installPhase = ''
        ls -alh
        mkdir $out
        cp -r node_modules $out/
        ls -alh $out/
      '';

      # We only need node_modules
      dontBuild = true;

      # Do not attempt generating a tarball
      doDist = false;

      meta = with lib; {
        description = "Node modules for erpnext";
        homepage = "https://github.com/frappe/erpnext";
        license = licenses.mit;
        maintainers = with maintainers; [ axeman teutat3s ];
      };
  };

  postInstall = ''
    mkdir -p $out/test/frappe $out/test/erpnext
    ln -s ${frappe-assets} $out/test/frappe
    ln -s ${erpnext-modules} $out/test/erpnext
  '';
}