import json
import pathlib
import sys
import xml.etree.ElementTree as ET

import py_common.graphql as graphql
import py_common.log as log

"""
This script parses xml files for metadata. 
The .xml file must be in the same directory as the gallery files and named either ComicInfo.xml for loose files (folder full of jpg/png's) 
or the same name as the .cbz/.zip file
"""


def query_xml(gallery_path, title):
    res = {"title": title}
    try:
        tree = ET.parse(gallery_path)
    except Exception as e:
        log.error(f"xml parsing failed:{e}")
        print("null")
        exit(1)

    if (node := tree.find("Title")) and (original_title := node.text):
        res["title"] = original_title

    if (node := tree.find("Web")) and (url := node.text):
        res["url"] = url

    if (node := tree.find("Summary")) and (details := node.text):
        res["details"] = details

    if (node := tree.find("Released")) and (date := node.text):
        res["date"] = date

    year = month = day = None
    if node := tree.find("Year"):
        year = node.text
    if node := tree.find("Month"):
        month = node.text
    if node := tree.find("Day"):
        day = node.text

    if year and month and day:
        res["date"] = f"{year}-{month:>02}-{day:>02}"

    if (node := tree.find("Genre")) and (tags := node.text):
        res["tags"] = [{"name": x} for x in tags.split(", ")]

    if (node := tree.find("Series")) and (series := node.text):
        res["tags"] = res.get("tags", []) + [{"name": f"Series/Parody: {series}"}]

    if (node := tree.find("Characters")) and (characters := node.text):
        res["performers"] = [{"name": x} for x in characters.split(", ")]

    if (node := tree.find("Writer")) and (studio := node.text):
        res["studio"] = {"name": studio}

    return res


if sys.argv[1] == "query":
    fragment = json.loads(sys.stdin.read())
    if not (gallery_path := graphql.getGalleryPath(fragment["id"])):
        log.error(f"No gallery path found for gallery with ID {fragment['id']}")
        print("null")
        sys.exit(1)

    p = pathlib.Path(gallery_path)
    # Determine if loose file format or archive such as .cbz or .zip
    if "cbz" in gallery_path or "zip" in gallery_path:
        # Look for filename.xml where filename.(cbz|zip) is the gallery
        f = p.with_suffix(".xml")
        log.debug(f"Single File Format: trying '{f}'")
    else:
        # Use loose files format
        # Look for ComicInfo.xml in the gallery's folder
        f = p.resolve() / "ComicInfo.xml"
        log.debug(f"Folder format: trying '{f}'")

    if not f.is_file():
        log.warning(f"No xml files found for the gallery: {p}")
        print("null")
        sys.exit(1)

    res = query_xml(f, fragment["title"])
    print(json.dumps(res))