class Checks:
    def __init__(self):
        self.custom_quality = 0.0
        self.i_file_extension = ""

    def perform(self, quality_selection, custom_quality, input_filepath, output_filepath):
        # Call this function to perform entry checks.
        # Returns True if all checks passed, False if one or more not passed.
        if self.quality_checks(quality_selection, custom_quality) and self.file_checks(input_filepath, output_filepath):
            return True
        else:
            return False

    def quality_checks(self, quality_sel, custom_q):
        if quality_sel != "Custom (will respect value below)":
            return True
        else:
            try:
                self.custom_quality = float(custom_q)
            except ValueError:
                if str(custom_q)[len(custom_q) - 1:] == "x":
                    print("x found")
                    try:
                        self.custom_quality = float(str(custom_q)[:len(custom_q) - 1])
                    except ValueError:
                        print("invalid custom quality multiplier")
                        return False
                else:
                    print("invalid letter in custom quality multiplier!")
                    return False
            if 4 >= self.custom_quality >= 1:
                print("quality selction ok")
                return True
            else:
                print("invalid range for multiplier!")

    def file_checks(self, i_fp, o_fp):
        self.i_file_extension = str(i_fp)[len(i_fp) - 4:]
        if self.i_file_extension == ".png" or self.i_file_extension == ".jpg":
            print("file extensions ok (image)")
        elif self.i_file_extension == "jpeg":
            if str(i_fp)[len(i_fp) - 5:] == ".jpeg":
                print("file extensions ok (image)")
            else:
                return False
        elif self.i_file_extension == ".mp4" or self.i_file_extension == ".mkv":
            print("file extensions ok (video)")
        else:
            return False

        if str(i_fp)[len(i_fp) - 4:] == str(o_fp)[len(o_fp) - 4:]:
            print("file extensions are the same in output and input")
            return True
        else:
            print("files don't have same extension!")
            return False