import html
import os

from modules import shared, ui_extra_networks, sd_models
from modules.ui_extra_networks import quote_js


class ExtraNetworksPageCheckpoints(ui_extra_networks.ExtraNetworksPage):
    def __init__(self):
        super().__init__('Checkpoints')

    def refresh(self):
        shared.refresh_checkpoints()

    def create_item(self, name, index=None, enable_filter=True):
        checkpoint: sd_models.CheckpointInfo = sd_models.checkpoint_aliases.get(name)
        path, ext = os.path.splitext(checkpoint.filename)
        return {
            "name": checkpoint.name_for_extra,
            "filename": checkpoint.filename,
            "preview": self.find_preview(path),
            "description": self.find_description(path),
            "search_term": self.search_terms_from_path(checkpoint.filename) + " " + (checkpoint.sha256 or ""),
            "onclick": '"' + html.escape(f"""return selectCheckpoint({quote_js(name)})""") + '"',
            "local_preview": f"{path}.{shared.opts.samples_format}",
            "metadata": checkpoint.metadata,
            "sort_keys": {'default': index, **self.get_sort_keys(checkpoint.filename)},
        }

    def list_items(self):
        for index, name in enumerate(sd_models.checkpoints_list):
            yield self.create_item(name, index)

    def allowed_directories_for_previews(self):
        return [v for v in [shared.cmd_opts.ckpt_dir, sd_models.model_path] if v is not None]

