from ..utils.transcoder import get_transcode_config, transcode, TranscodeConfig
from ..utils.scan_for_music import file_from_path
from ..transcode_levels import transcode_levels

from pathlib import Path
from json import load as load_json_file

class TranscodeCommand:
    def __init__(
        self,
        src: str, 
        dest: str, 
        transcode_level: str,
        ignore_extension: bool,
        custom_encoder_config_path: str,
    ):
        self.src = src
        self.dest = dest
        self.transcode_level = transcode_level
        self.ignore_extension = ignore_extension
        self.custom_encoder_config_path = custom_encoder_config_path

    def run(self):
        if self.transcode_level == "list":
            print("Transcode Levels:", ", ".join(transcode_levels))
            exit()

        print("Transcoding...")
        input_file = file_from_path(Path(self.src), "")
        
        if self.custom_encoder_config_path is None or len(self.custom_encoder_config_path) == 0:
            trans_config = get_transcode_config(input_file, self.transcode_level)
        else:
            with open(self.custom_encoder_config_path, "r+") as f: 
                trans_config_dict = load_json_file(f)
                trans_config = TranscodeConfig()
                trans_config.load_from_dict(trans_config_dict)

        output_file = file_from_path(Path(self.dest), "")

        if trans_config.file_extension != output_file.extension and not self.ignore_extension:
            print(
                f"{output_file.extension} is not the recommended "+
                f"extension for transcode_level {self.transcode_level} "+
                f"please change it to {trans_config.file_extension} "+
                f"or run with --ignore-extension"
            )
            exit()
        transcode(input_file, trans_config, self.dest)