import os
import re
import json
import concurrent.futures
from modules import shared, ui_extra_networks, modelstats
from modules.logger import log
from modules.lora import lora_load


debug = os.environ.get('SD_LORA_DEBUG', None) is not None


class ExtraNetworksPageLora(ui_extra_networks.ExtraNetworksPage):
    def __init__(self):
        super().__init__('Lora')
        self.list_time = 0

    def refresh(self):
        lora_load.list_available_networks()

    @staticmethod
    def get_tags(l, info, version):
        tags = {}
        try:
            if l.metadata is not None:
                modelspec_tags = l.metadata.get('modelspec.tags', {})
                possible_tags = l.metadata.get('ss_tag_frequency', {}) # tags from model metedata
                if isinstance(possible_tags, str):
                    possible_tags = {}
                if isinstance(modelspec_tags, str):
                    modelspec_tags = {}
                if len(list(modelspec_tags)) > 0:
                    possible_tags.update(modelspec_tags)
                for k, v in possible_tags.items():
                    words = k.split('_', 1) if '_' in k else [v, k]
                    words = [str(w).replace('.json', '') for w in words]
                    if words[0] == '{}':
                        words[0] = 0
                    tag = ' '.join(words[1:]).lower()
                    tags[tag] = words[0]

            possible_tags = version.get('trainedWords', [])
            if isinstance(possible_tags, list):
                for tag_str in possible_tags:
                    for tag in tag_str.split(','):
                        tag = tag.strip().lower()
                        if tag not in tags:
                            tags[tag] = 0

            possible_tags = info.get('tags', []) # tags from info json
            if not isinstance(possible_tags, list):
                possible_tags = list(possible_tags.values())
            for tag in possible_tags:
                tag = tag.strip().lower()
                if tag not in tags:
                    tags[tag] = 0
        except Exception:
            pass

        # cleanup tags: remove model names, bad words, and special characters
        model_words = ['ltx', 'minimax', 'h3', 'sdxl', 'klein', 'wan', 'flux', 'qwen', 'vace', 'lcm', 'slider']
        bad_words = ['concept', 'style', 'styles', 'base model', 'video', 'audio', 'turbo', 'distill', 'assets', 'action', 'enhancer', 'detail', 'tool', 'dir', 'all']
        bad_parts = ['lora', 'comfyui', 't2i', 'i2i', 't2v', 'i2v', 'steps']
        bad_chars = [';', ':', '<', ">", "*", '?', '\'', '\"', '(', ')', '[', ']', '{', '}', '\\', '/']
        clean_tags = {}
        for k, v in tags.items():
            if k in bad_words:
                continue
            if any(k.startswith(s) for s in model_words):
                continue
            if any(s in k for s in bad_parts):
                continue
            tag = ''.join(i for i in k if i not in bad_chars).strip()
            clean_tags[tag] = v

        clean_tags.pop('img', None)
        clean_tags.pop('dataset', None)
        return clean_tags

    _VERSION_DISPLAY = {
        'f1': 'Flux 1', 'flux.1 d': 'Flux 1',
        'f2': 'Flux 2',
        'sd1': 'SD 1.5',
        'sd2': 'SD 2',
        'sd3': 'SD 3',
        'xl': 'SDXL',
        'sc': 'Cascade',
        'hv': 'Hunyuan Video',
        'chroma': 'Chroma',
        'qwen': 'Qwen',
        'krea2': 'Krea 2',
        'wan': 'Wan',
        'minimax': 'MiniMax H3',
        'pixart-sigma': 'Pixart Sigma',
        'wan video 2.2 a14b': 'Wan Video A14B', 'wan video 14b': 'Wan Video A14B',
        'zimage': 'Z-Image', 'zimagebase': 'Z-Image', 'zimageturbo': 'Z-Image',
        'other': ''
    }

    def cleanup_version(self, dct, lora):
        ver = dct.get("baseModel", lora.sd_version)
        for suffix in ('0.9', '1.0', '768', 'lightning', 'hyper', 'turbo', 'i2v', 't2v-', 't2v', '720p'):  # strip uninformative minor versions
            ver = re.sub(suffix, '', ver, flags=re.IGNORECASE).strip()
        ver = self._VERSION_DISPLAY.get(ver.lower(), ver)
        return ver

    def create_item(self, name):
        l = lora_load.available_networks.get(name) or lora_load.available_network_aliases.get(name) # that table mangles dots in the stem to underscores; the aliases carry the natural basename and the subfolder path
        if l is None:
            log.warning(f'Networks: type=lora registered={len(list(lora_load.available_networks))} file="{name}" not registered')
            return None
        try:
            # path, _ext = os.path.splitext(l.filename)
            name = os.path.splitext(os.path.relpath(l.filename, shared.cmd_opts.lora_dir))[0]
            size, mtime = modelstats.stat(l.filename)
            info = self.find_info(l.filename)
            ver_dct = self.find_version(l, info)
            item = {
                "type": 'Lora',
                "name": name,
                "alias": os.path.splitext(os.path.basename(l.filename))[0],
                "filename": l.filename,
                "hash": l.shorthash,
                "prompt": json.dumps(f" <lora:{l.get_alias()}:{shared.opts.extra_networks_default_multiplier}>"),
                "metadata": json.dumps(l.metadata, indent=4) if l.metadata else None,
                "mtime": mtime,
                "size": size,
                "version": self.cleanup_version(ver_dct, l),
                "info": info,
                "description": self.find_description(l.filename, info),
                "tags": self.get_tags(l, info, ver_dct),
            }
            return item
        except Exception as e:
            log.error(f'Networks: type=lora file="{name}" {e}')
            if debug:
                from modules import errors
                errors.display(e, 'Lora')
            return None

    def list_items(self):
        items = []
        with concurrent.futures.ThreadPoolExecutor(max_workers=shared.max_workers) as executor:
            future_items = {executor.submit(self.create_item, net): net for net in lora_load.available_networks}
            for future in concurrent.futures.as_completed(future_items):
                item = future.result()
                if item is not None:
                    items.append(item)
        self.update_all_previews(items)
        return items

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