from picard import config, log
from picard.ui.options import OptionsPage, register_options_page
from picard.metadata import register_track_metadata_processor
from PyQt5 import QtWidgets

from .constants import *

def process_track(_, metadata, track, __):    
    disambiguation = track["recording"]["disambiguation"] if "recording" in track and "disambiguation" in track["recording"] else track["disambiguation"] if "disambiguation" in track else ""
    album_disambiguation = metadata["~releasecomment"] if "~releasecomment" in metadata else ""

    explicit_keywords = config.setting["ecd2itat_explicit_keywords"] or DEFAULT_EXPLICIT_KEYWORDS
    if isinstance(explicit_keywords, str):
        explicit_keywords = [kw.strip() for kw in explicit_keywords.split(",")]

    clean_keywords = config.setting["ecd2itat_clean_keywords"] or DEFAULT_CLEAN_KEYWORDS
    if isinstance(clean_keywords, str):
        clean_keywords = [kw.strip() for kw in clean_keywords.split(",")]

    explicit_match = next((kw for kw in explicit_keywords if kw.lower() in disambiguation.strip().lower()), None)
    clean_match = next((kw for kw in clean_keywords if kw.lower() in disambiguation.strip().lower()), None)

    stripped_disambiguation = disambiguation
    stripped_album_disambiguation = album_disambiguation

    if explicit_match:
        metadata["itunesadvisory"] = iTunesAdvisory.EXPLICIT.value

        if config.setting["ecd2itat_save_rtng"]:
            metadata["rtng"] = rtng.EXPLICIT.value

        if config.setting["ecd2itat_strip_keyword_from_disambiguation"]:
            stripped_disambiguation = strip_keyword_from_disambiguation(disambiguation, explicit_match)
            stripped_album_disambiguation = strip_keyword_from_disambiguation(album_disambiguation, explicit_match)
    elif clean_match:
        metadata["itunesadvisory"] = iTunesAdvisory.CLEAN.value

        if (config.setting["ecd2itat_save_rtng"]):
            metadata["rtng"] = rtng.CLEAN.value

        if config.setting["ecd2itat_strip_keyword_from_disambiguation"]:
            stripped_disambiguation = strip_keyword_from_disambiguation(disambiguation, clean_match)
            stripped_album_disambiguation = strip_keyword_from_disambiguation(album_disambiguation, clean_match)

    metadata["~recordingcomment"] = stripped_disambiguation
    metadata["~releasecomment"] = stripped_album_disambiguation

def strip_keyword_from_disambiguation(disambiguation, keyword):
    # If the keyword is the entire disambiguation, return an empty string (e,g. "explicit" becomes "")
    if disambiguation.strip().lower() == keyword.lower():
        return ""

    # keyword is at the start of the disambiguation (e.g. "explicit, original mix" becomes "original mix")
    if disambiguation.strip().lower().startswith(keyword.lower() + ","):
        return disambiguation[len(keyword)+1:].strip()

    # keyword is at the end of the disambiguation (e.g. "original mix,explicit" becomes "original mix")
    if disambiguation.strip().lower().endswith("," + keyword.lower()):
        return disambiguation[:-len(keyword)-1].strip()
    
    # keyword is at the end with a preceding comma and space (e.g. "original mix, explicit" becomes "original mix")
    if disambiguation.strip().lower().endswith(", " + keyword.lower()):
        return disambiguation[:-len(keyword)-2].strip()

    # keyword is in the middle of the disambiguation (e.g. "album version, explicit, remix" becomes "album version, remix")
    if "," + keyword.lower() + "," in disambiguation.strip().lower():
        return disambiguation.replace("," + keyword + ",", ",").strip()

    # Return the disambiguation unchanged if the keyword is not found or cannot be stripped
    log.debug(f"Keyword '{keyword}' not found in disambiguation '{disambiguation}' for stripping")
    return disambiguation

class ECD2ITatOptionsPage(OptionsPage):
    NAME = "ecd2itat"
    TITLE = "ecd2iTat"
    PARENT = "plugins"

    options = CONFIG_OPTIONS

    def __init__(self, parent=None) -> None:
        super().__init__(parent)
        self.setup_ui()

    def setup_ui(self):
        layout = QtWidgets.QVBoxLayout(self)

        options_group = QtWidgets.QGroupBox("Options", self)
        options_group.setSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
        options_layout = QtWidgets.QVBoxLayout(options_group)

        self.save_rtng_checkbox = QtWidgets.QCheckBox("Save rtng", self)
        self.save_rtng_checkbox.setToolTip("Save the rtng tag")

        self.ecd2itat_strip_keyword_from_disambiguation_checkbox = QtWidgets.QCheckBox("Strip keywords from disambiguation", self)
        self.ecd2itat_strip_keyword_from_disambiguation_checkbox.setToolTip("Try to remove the keyword from the disambiguation after processing, enable this if you don't want the keywords to be visible in the disambiguation (applies to albums too)")

        options_layout.addWidget(self.save_rtng_checkbox)
        options_layout.addWidget(self.ecd2itat_strip_keyword_from_disambiguation_checkbox)

        layout.addWidget(options_group)

        keywords_group = QtWidgets.QGroupBox("Keywords", self)
        keywords_group.setSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Minimum)
        keywords_layout = QtWidgets.QVBoxLayout(keywords_group)

        explicit_keywords_layout = QtWidgets.QHBoxLayout()
        explicit_keywords_label = QtWidgets.QLabel("Explicit:", self)
        self.explicit_keywords_input = QtWidgets.QLineEdit(self)
        self.explicit_keywords_input.setPlaceholderText("Comma-separated list of keywords to consider as explicit")
        self.explicit_keywords_input.setToolTip("Comma-separated list of keywords to consider as explicit")

        explicit_keywords_layout.addWidget(explicit_keywords_label)
        explicit_keywords_layout.addWidget(self.explicit_keywords_input)

        clean_keywords_layout = QtWidgets.QHBoxLayout()
        clean_keywords_label = QtWidgets.QLabel("Clean:", self)
        self.clean_keywords_input = QtWidgets.QLineEdit(self)
        self.clean_keywords_input.setPlaceholderText("Comma-separated list of keywords to consider as clean")
        self.clean_keywords_input.setToolTip("Comma-separated list of keywords to consider as clean")

        clean_keywords_layout.addWidget(clean_keywords_label)
        clean_keywords_layout.addWidget(self.clean_keywords_input)

        keywords_layout.addLayout(explicit_keywords_layout)
        keywords_layout.addLayout(clean_keywords_layout)

        layout.addWidget(keywords_group)

        layout.addStretch()

    def load(self):
        self.save_rtng_checkbox.setChecked(config.setting["ecd2itat_save_rtng"] or False)
        self.ecd2itat_strip_keyword_from_disambiguation_checkbox.setChecked(config.setting["ecd2itat_strip_keyword_from_disambiguation"] or False)
        self.explicit_keywords_input.setText(config.setting["ecd2itat_explicit_keywords"] or ", ".join(DEFAULT_EXPLICIT_KEYWORDS))
        self.clean_keywords_input.setText(config.setting["ecd2itat_clean_keywords"] or ", ".join(DEFAULT_CLEAN_KEYWORDS))

    def save(self):
        config.setting["ecd2itat_save_rtng"] = self.save_rtng_checkbox.isChecked()
        config.setting["ecd2itat_strip_keyword_from_disambiguation"] = self.ecd2itat_strip_keyword_from_disambiguation_checkbox.isChecked()
        config.setting["ecd2itat_explicit_keywords"] = self.explicit_keywords_input.text()
        config.setting["ecd2itat_clean_keywords"] = self.clean_keywords_input.text()

register_options_page(ECD2ITatOptionsPage)
register_track_metadata_processor(process_track)