import pathlib

from .render import render

class view:
    def __init__(self, source: pathlib.Path):
        if not source.is_file():
            raise Exception("Source \"" + str(source) + "\" not exists.")

        self.__renderer = render(source)
        self.__result = None

    def add_params(self, params: dict) -> object:
        for param in params.keys():
            self.__renderer.add(param, params[param])

        return self

    def set_result(self, result: pathlib.Path) -> object:
        self.__result = result
        return self

    def save(self) -> object:
        if self.__result.is_file():
            self.__result.unlink()

        if self.__result.is_dir():
            raise Exception("View \"" + str(self.__result) + "\" is dir.")

        with self.__result.open("w") as result:
            result.write(self.__renderer.finalize())

        return self