import subprocess
import os
from enum import Enum
import logging

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

class CZKAWKA_DELETION_METHOD(Enum):
    ALL_EXCEPT_NEWEST = "AEN"
    ALL_EXCEPT_OLDEST = "AEO"
    ALL_EXCEPT_BIGGEST = "AEB"
    ALL_EXCEPT_SMALLEST = "AES"
    NONE="NONE"

def deduplicate_files(target_dir, exclude_files):
    czkawka_executable = "czkawka"
    czkawka_deletion_method = CZKAWKA_DELETION_METHOD.ALL_EXCEPT_SMALLEST
    czkawka_tolerance = os.environ.get("CK_DUPLICATE_TOLERANCE", "2")
    _remove_duplicates(czkawka_executable, target_dir, exclude_files, czkawka_deletion_method, czkawka_tolerance)

def _remove_duplicates(czkawka_path, target_dir, exclude_files, delete_method, tolerance):
    try:
        flags = _build_czkawka_flags(target_dir, exclude_files, delete_method, tolerance)
        
        result = subprocess.run([czkawka_path, *flags], capture_output=True, text=True, check=True)
        logger.log(result.stdout)

    except subprocess.CalledProcessError as e:
        logger.error(f"Failed to find duplicates: {e.stderr}")

def _build_czkawka_flags(target_dir, exclude_files, delete_method, tolerance):
    flags = ["video", "--directories", target_dir, "--not-recursive", "--delete-method", delete_method.value]
    

    for file in exclude_files:
            flags.append("--excluded-items")
            flags.append(file)
            
    flags.append("--tolerance")
    flags.append(tolerance)
    return flags