import json
import os
import lora

from modules import shared, ui_extra_networks
from ui_edit_user_metadata import LoraUserMetadataEditor


class ExtraNetworksPageLora(ui_extra_networks.ExtraNetworksPage):
    def __init__(self):
        super().__init__('Lora')

    def refresh(self):
        lora.list_available_loras()

    def list_items(self):
        for index, (name, lora_on_disk) in enumerate(lora.available_loras.items()):
            path, ext = os.path.splitext(lora_on_disk.filename)

            alias = lora_on_disk.get_alias()

            item = {
                "name": name,
                "filename": lora_on_disk.filename,
                "preview": self.find_preview(path),
                "description": self.find_description(path),
                "search_term": self.search_terms_from_path(lora_on_disk.filename),
                "local_preview": f"{path}.{shared.opts.samples_format}",
                "metadata": json.dumps(lora_on_disk.metadata, indent=4) if lora_on_disk.metadata else None,
                "sort_keys": {'default': index, **self.get_sort_keys(lora_on_disk.filename)},
            }

            self.read_user_metadata(item)
            activation_text = item["user_metadata"].get("activation text")
            preferred_weight = item["user_metadata"].get("preferred weight", 0.0)
            item["prompt"] = json.dumps(f"<lora:{alias}:") + " + " + (str(preferred_weight) if preferred_weight else "opts.extra_networks_default_multiplier") + " + " + json.dumps(">")

            if activation_text:
                item["prompt"] += " + " + json.dumps(" " + activation_text)

            yield item

    def allowed_directories_for_previews(self):
        return [shared.cmd_opts.lora_dir]

    def create_user_metadata_editor(self, ui, tabname):
        return LoraUserMetadataEditor(ui, tabname, self)