{ lib
, fetchFromGitHub
, nixosTests
, nix-update-script
, python3
}:

let
  python = python3.override {
    self = python;
    packageOverrides = self: super: {
      sqlalchemy = super.sqlalchemy_1_4;
    };
  };
in
python.pkgs.buildPythonApplication rec {
  pname = "calibre-web";
  version = "0.6.22";

  src = fetchFromGitHub {
    owner = "janeczku";
    repo = "calibre-web";
    rev = version;
    hash = "sha256-nWZmDasBH+DW/+Cvw510mOv11CXorRnoBwNFpoKPErY=";
  };

  propagatedBuildInputs = with python.pkgs; [
    advocate
    apscheduler
    babel
    bleach
    chardet
    flask
    flask-babel
    flask-limiter
    flask-login
    flask-principal
    flask-wtf
    iso-639
    jsonschema
    lxml
    pypdf
    python-magic
    pytz
    regex
    requests
    sqlalchemy
    tornado
    unidecode
    wand
    werkzeug
  ];

  patches = [
    # default-logger.patch switches default logger to /dev/stdout. Otherwise calibre-web tries to open a file relative
    # to its location, which can't be done as the store is read-only. Log file location can later be configured using UI
    # if needed.
    ./default-logger.patch
    # DB migrations adds an env var __RUN_MIGRATIONS_ANDEXIT that, when set, instructs calibre-web to run DB migrations
    # and exit. This is gonna be used to configure calibre-web declaratively, as most of its configuration parameters
    # are stored in the DB.
    ./db-migrations.patch
  ];

  # calibre-web doesn't follow setuptools directory structure.
  postPatch = ''
    mkdir -p src/calibreweb
    mv cps.py src/calibreweb/__init__.py
    mv cps src/calibreweb

    substituteInPlace setup.cfg \
      --replace-fail "cps = calibreweb:main" "calibre-web = calibreweb:main"
  '';

  # Upstream repo doesn't provide any tests.
  doCheck = false;

  passthru = {
    tests.calibre-web = nixosTests.calibre-web;
    updateScript = nix-update-script { };
  };

  meta = with lib; {
    description = "Web app for browsing, reading and downloading eBooks stored in a Calibre database";
    homepage = "https://github.com/janeczku/calibre-web";
    license = licenses.gpl3Plus;
    maintainers = with maintainers; [ pborzenkov ];
    platforms = platforms.all;
    mainProgram = "calibre-web";
  };
}