#!/usr/bin/python3
import inspect
import argparse
import bjoern
import typing


def install(arguments):
    from flaschengeist.app import create_app, install_all

    app = create_app()
    with app.app_context():
        install_all()


def run(arguments):
    from flaschengeist.app import create_app

    app = create_app()
    with app.app_context():
        if arguments.debug:
            app.run(arguments.host, arguments.port, debug=True)
        else:
            bjoern.run(app, arguments.host, arguments.port, reuse_port=True)


def export(arguments):
    import flaschengeist.system.models as models

    known = []
    classes = {}

    def pytype(cls):
        if isinstance(cls, list):
            return "", "Array<{}>".format(pytype(cls[0])[1])
        #if typing.get_origin(cls) is typing.Optional:
        #    return "?", pytype(typing.get_args(cls)[1])
        mapper = {"str": "string", "int": "number", "float": "number", "datetime": "Date"}
        if hasattr(cls, "__name__"):
            if cls.__name__ in mapper:
                return "", mapper[cls.__name__]
            else:
                return "", cls.__name__
        return "?", "any"

    def walker(mod):
        if inspect.ismodule(mod[1]) and mod[1].__name__.startswith(models.__name__) and mod[1].__name__ not in known:
            known.append(mod[1].__name__)
            for cls in inspect.getmembers(mod[1], lambda x: inspect.isclass(x) or inspect.ismodule(x)):
                walker(cls)
        elif (
            inspect.isclass(mod[1])
            and mod[1].__module__.startswith(models.__name__)
            and mod[0] not in classes
            and not mod[0].startswith("_")
            and hasattr(mod[1], "__annotations__")
        ):
            d = {param: pytype(ptype) for param, ptype in mod[1].__annotations__.items() if not param.startswith("_")}
            if len(d) == 1:
                key, value = d.popitem()
                classes[mod[0]] = value[1]
            else:
                classes[mod[0]] = d

    from flaschengeist.app import create_app

    app = create_app()
    with app.app_context():
        walker(("models", models))
        with open(arguments.file, "w") as file:
            file.write("declare namespace {} \{\n".format(arguments.namespace))
            for cls, params in classes.items():
                if isinstance(params, str):
                    file.write("\ttype {} = {};\n".format(cls, params))
                else:
                    file.write("\tinterface {} {{\n".format(cls))
                    for name in params:
                        file.write("\t\t{}{}: {};\n".format(name, *params[name]))
                    file.write("\t}\n")
            file.write("}\n")


if __name__ == "__main__":
    # create the top-level parser
    parser = argparse.ArgumentParser()
    subparsers = parser.add_subparsers(help="sub-command help", dest="sub_command")
    subparsers.required = True
    parser_run = subparsers.add_parser("run", help="run flaschengeist")
    parser_run.set_defaults(func=run)
    parser_run.add_argument("--host", help="set hostname to listen on", default="127.0.0.1")
    parser_run.add_argument("--port", help="set port to listen on", type=int, default=5000)
    parser_run.add_argument("--debug", help="run in debug mode", action="store_true")
    parser_install = subparsers.add_parser(
        "install", help="run database setup for flaschengeist and all installed plugins"
    )
    parser_install.set_defaults(func=install)
    parser_export = subparsers.add_parser("export", help="export models to typescript interfaces")
    parser_export.set_defaults(func=export)
    parser_export.add_argument("--file", help="Filename where to save", default="flaschengeist.d.ts")
    parser_export.add_argument("--namespace", help="Namespace of declarations", default="FG")

    args = parser.parse_args()
    args.func(args)