#!/usr/bin/env python
# -*- coding: utf-8 -*- 
#
# 画像ファイルと.captionと.tagsファイルを.txtファイルに連結する
# Concatenate image files and .caption and .tags files to .txt files
#
# This script walks through a directory, identifies image files, and checks for the existence of corresponding
# .caption and .tags files. It then concatenates the contents of .caption and .tags files into the .txt files.
#
# Usage:
#     - Place the script in the directory containing the image files.
#     - Run the script to concatenate .caption and .tags files into .txt files.
#     - Use the dry_run flag to preview the changes without writing to the .txt files.
#     - Files missing either .caption or .tags will be skipped.
#
# Functions:
#     get_files(path): Walks through the directory and yields image files along with their .caption and .tags files.
#     concat(caption_path, tags_path, txt_path, source_file, dry_run=False): Concatenates the contents of .caption and .tags files into the .txt file.

from pathlib import Path
import os
from utils.file_processor import FileProcessor, ProcessorOptions

FILE_EXTS = {".png", ".jpg", ".jpeg", ".tiff", ".bmp", ".gif", ".jxl", ".webp"}


def get_files(path):
    path = Path(path)
    # Walk the directory, looking for image files
    for root, dirs, files in os.walk(path):
        root = path / root
        for file in files:
            file = root / file
            if file.suffix not in FILE_EXTS:
                continue
            caption = file.with_suffix(".caption")
            tags = file.with_suffix(".tags")
            txt = file.with_suffix(".txt")
            
            if not caption.exists():
                print(f"Skipping {file}: {caption} does not exist")
                continue
            if not tags.exists():
                print(f"Skipping {file}: {tags} does not exist")
                continue
                
            yield file, caption, tags, txt


class FilenameProcessor(FileProcessor):
    def process_content(self, content: str) -> str:
        # Remove the specified pattern and file extension
        name = content.replace('_24_regular_1024x1024', '')
        # Convert remaining underscores to spaces
        return name.replace('_', ' ').strip()


class CaptionPrefixConcatenator:
    def __init__(self, dry_run: bool = False):
        self.dry_run = dry_run
        self.options = ProcessorOptions(
            recursive=False,
            dry_run=dry_run,
            file_extensions={'.caption', '.txt'}
        )
    
    def concat(self, caption_path: Path, tags_path: Path, txt_path: Path, source_file: Path):
        caption = caption_path.read_text().strip()
        tags = tags_path.read_text().strip(", \n")
        
        # Get the formatted filename prefix
        prefix = source_file.stem.replace('_24_regular_1024x1024', '').replace('_', ' ').strip()
        
        # Combine the text with the prefix
        txt = f"{prefix}, {tags}, {caption}"
        
        if self.dry_run:
            print(f"{txt_path}:")
            print(txt)
            print()
        else:
            txt_path.write_text(txt)
            print(f"wrote {txt_path}")


def main():
    dry_run = False
    concatenator = CaptionPrefixConcatenator(dry_run=dry_run)
    
    for file, caption, tags, txt in get_files("."):
        concatenator.concat(caption, tags, txt, file)


if __name__ == "__main__":
    main()