import os 
import sys 
import shutil 
from src.logger import logging 
from src.exception import PlantException
from src.entity.config_entity import DataValidationConfig 
from src.entity.artifact_entity import DataIngestionArtifact 
from src.entity.artifact_entity import DataValidationArtifact

class DataValidation:
    def __init__(self,data_ingestion_artifact: DataIngestionArtifact, 
                      data_validation_config: DataValidationConfig):

        try:
            self.data_ingestion_artifact = data_ingestion_artifact
            self.data_validation_config = data_validation_config

        except Exception as e:
            raise PlantException(e, sys)

        
    def validate_all_files_exist(self) -> bool:
        try:

            validation_status = None
            all_files = os.listdir(self.data_ingestion_artifact.dataset_path)
            logging.info(f"File format we got: {all_files}")

            for file in all_files:
                if file not in self.data_validation_config.required_file_list:
                    validation_status = False
                    os.makedirs(self.data_validation_config.data_validation_dir, exist_ok=True)
                    
                    with open(self.data_validation_config.valid_status_file_dir, "w") as f:
                        f.write(f"Validation status: {validation_status}")
                
                else:
                    validation_status = True
                    os.makedirs(self.data_validation_config.data_validation_dir, exist_ok=True)
                    with open(self.data_validation_config.valid_status_file_dir, "w") as f:
                        f.write(f"Validation status: {validation_status}")
            
            return validation_status

        except Exception as e:
            raise PlantException(e, sys)

    def initiate_data_validation(self) -> DataValidationArtifact:
        logging.info("Entered initiate_data_validation method of DataValidation class")
        try:
            status = self.validate_all_files_exist()
            data_validation_artifact = DataValidationArtifact(validation_status=status)

            logging.info("Exited initiate_data_validation method of DataValidation class")
            logging.info(f"Data validation artifact: {data_validation_artifact}")

            # if status:
            #     shutil.copy(self.data_ingestion_artifact.data_zip_file_path, os.getcwd())
            
            return data_validation_artifact
            
        except Exception as e:
            raise PlantException(e, sys)