from PIL import Image
import torch

from transformers import (
    AutoImageProcessor,
    AutoModelForImageClassification,
)

import gradio as gr
import spaces  # ZERO GPU

MODEL_NAMES = ["p1atdev/wd-swinv2-tagger-v3-hf"]
MODEL_NAME = MODEL_NAMES[0]

model = AutoModelForImageClassification.from_pretrained(MODEL_NAME, trust_remote_code=True)
model.to("cuda" if torch.cuda.is_available() else "cpu")
processor = AutoImageProcessor.from_pretrained(MODEL_NAME, trust_remote_code=True)


def _people_tag(noun: str, minimum: int = 1, maximum: int = 5):
    return (
        [f"1{noun}"]
        + [f"{num}{noun}s" for num in range(minimum + 1, maximum + 1)]
        + [f"{maximum+1}+{noun}s"]
    )


PEOPLE_TAGS = (
    _people_tag("girl") + _people_tag("boy") + _people_tag("other") + ["no humans"]
)


RATING_MAP = {
    "general": "safe",
    "sensitive": "sensitive",
    "questionable": "nsfw",
    "explicit": "explicit, nsfw",
}
DANBOORU_TO_E621_RATING_MAP = {
    "safe": "rating_safe",
    "sensitive": "rating_safe",
    "nsfw": "rating_explicit",
    "explicit, nsfw": "rating_explicit",
    "explicit": "rating_explicit",
    "rating:safe": "rating_safe",
    "rating:general": "rating_safe",
    "rating:sensitive": "rating_safe",
    "rating:questionable, nsfw": "rating_explicit",
    "rating:explicit, nsfw": "rating_explicit",
}


def character_list_to_series_list(character_list):
    def get_series_dict():
        import re

        with open('characterfull.txt', 'r') as f:
            lines = f.readlines()

        series_dict = {}
        for line in lines:
            parts = line.strip().split(', ')
            if len(parts) >= 3:
                name = parts[-2].replace("\\", "")
            if name.endswith(")"):
                names = name.split("(")
                character_name = "(".join(names[:-1])
                if character_name.endswith(" "):
                    name = character_name[:-1]
            series = re.sub(r'\\[()]', '', parts[-1])
            series_dict[name] = series

        return series_dict
    
    output_series_tag = []
    series_tag = ""
    series_dict = get_series_dict()
    for tag in character_list:
        series_tag = series_dict.get(tag, "")
        if tag.endswith(")"):
            tags = tag.split("(")
            character_tag = "(".join(tags[:-1])
            if character_tag.endswith(" "):
                character_tag = character_tag[:-1]
            series_tag = tags[-1].replace(")", "")

    if series_tag:
        output_series_tag.append(series_tag)

    return output_series_tag


def get_e621_dict():
    with open('danbooru_e621.csv', 'r', encoding="utf-8") as f:
        lines = f.readlines()

    e621_dict = {}
    for line in lines:
        parts = line.strip().split(',')
        e621_dict[parts[0]] = parts[1]

    return e621_dict


def danbooru_to_e621(dtag, e621_dict):
    def d_to_e(match, e621_dict):
        dtag = match.group(0)
        etag = e621_dict.get(dtag.strip().replace("_", " "), "")
        if etag:
            return etag
        else:
            return dtag
    
    import re
    tag = re.sub(r'[\w ]+', lambda wrapper: d_to_e(wrapper, e621_dict), dtag, 2)

    return tag


def convert_danbooru_to_e621_prompt(input_prompt: str = "", prompt_type: str = "danbooru"):
    if prompt_type == "danbooru": return input_prompt
    tags = input_prompt.split(",") if input_prompt else []
    people_tags: list[str] = []
    other_tags: list[str] = []
    rating_tags: list[str] = []

    e621_dict = get_e621_dict()
    for tag in tags:
        tag = tag.strip().replace("_", " ")
        tag = danbooru_to_e621(tag, e621_dict)
        if tag in PEOPLE_TAGS:        
            people_tags.append(tag)
        elif tag in DANBOORU_TO_E621_RATING_MAP.keys():
            rating_tags.append(DANBOORU_TO_E621_RATING_MAP.get(tag.replace(" ",""), ""))            
        else:
            other_tags.append(tag)

    rating_tags = sorted(set(rating_tags), key=rating_tags.index)
    rating_tags = [rating_tags[0]] if rating_tags else []
    rating_tags = ["explicit, nsfw"] if rating_tags[0] == "explicit" else rating_tags

    output_prompt = ", ".join(people_tags + other_tags + rating_tags)
    
    return output_prompt


def insert_recom_prompt(prompt: str = "", neg_prompt: str = "", type: str = "None"):
    def to_list(s):
        return [x.strip() for x in s.split(",") if not s == ""]
    
    def list_sub(a, b):
        return [e for e in a if e not in b]
    
    def list_uniq(l):
        return sorted(set(l), key=l.index)

    animagine_ps = to_list("masterpiece, best quality, very aesthetic, absurdres")
    animagine_nps = to_list("lowres, (bad), text, error, fewer, extra, missing, worst quality, jpeg artifacts, low quality, watermark, unfinished, displeasing, oldest, early, chromatic aberration, signature, extra digits, artistic error, username, scan, [abstract]")
    pony_ps = to_list("source_anime, score_9, score_8_up, score_7_up, masterpiece, best quality, very aesthetic, absurdres")
    pony_nps = to_list("source_pony, source_furry, source_cartoon, score_6, score_5, score_4, busty, ugly face, mutated hands, low res, blurry face, black and white, the simpsons, overwatch, apex legends")
    prompts = to_list(prompt)
    neg_prompts = to_list(neg_prompt)

    prompts = list_sub(prompts, animagine_ps + pony_ps)
    neg_prompts = list_sub(neg_prompts, animagine_nps + pony_nps)

    last_empty_p = [""] if not prompts and type != "None" else []
    last_empty_np = [""] if not neg_prompts and type != "None" else []

    if type == "Animagine":
        prompts = prompts + animagine_ps
        neg_prompts = neg_prompts + animagine_nps
    elif type == "Pony":
        prompts = prompts + pony_ps
        neg_prompts = neg_prompts + pony_nps

    prompt = ", ".join(list_uniq(prompts) + last_empty_p)
    neg_prompt = ", ".join(list_uniq(neg_prompts) + last_empty_np)

    return prompt, neg_prompt


def translate_prompt(prompt: str = ""):
    def translate_to_english(prompt):
        import httpcore
        setattr(httpcore, 'SyncHTTPTransport', 'AsyncHTTPProxy')
        from googletrans import Translator
        translator = Translator()
        try:
            translated_prompt = translator.translate(prompt, src='auto', dest='en').text
            return translated_prompt
        except Exception as e:
            return prompt

    def is_japanese(s):
        import unicodedata
        for ch in s:
            name = unicodedata.name(ch) 
            if "CJK UNIFIED" in name or "HIRAGANA" in name or "KATAKANA" in name:
                return True
        return False

    def to_list(s):
        return [x.strip() for x in s.split(",")]
    
    prompts = to_list(prompt)
    outputs = []
    for p in prompts:
        p = translate_to_english(p) if is_japanese(p) else p
        outputs.append(p)

    return ", ".join(outputs)


def get_tag_group_dict():
    with open('tag_group.csv', 'r', encoding="utf-8") as f:
        lines = f.readlines()

    tag_group_dict = {}
    for line in lines:
        parts = line.strip().split(',')
        tag_group_dict[parts[0]] = parts[1]

    return tag_group_dict


def remove_specific_prompt(input_prompt: str = "", keep_tags: str = "all"):
    def is_dressed(tag):
        import re
        p = re.compile(r'dress|cloth|uniform|costume|vest|sweater|coat|shirt|jacket|blazer|apron|leotard|hood|sleeve|skirt|shorts|pant|loafer|ribbon|necktie|bow|collar|glove|sock|shoe|boots|wear|emblem')
        return p.search(tag)

    def is_background(tag):
        import re
        p = re.compile(r'background|outline|light|sky|build|day|screen|tree|city')
        return p.search(tag)

    un_tags = ['solo']
    group_list = ['people', 'age', 'pattern', 'place', 'hair', 'modifier', 'screen', 'animal', 'effect', 'situation', 'status', 'lighting', 'accesory', 'body', 'nsfw', 'camera', 'option', 'taste', 'other', 'detail', 'action', 'dress', 'character', 'face', 'costume', 'attribute', 'weather', 'temporary', 'gender', 'favorite', 'food', 'object', 'quality', 'expression', 'life', 'background']
    keep_group_dict = {
        "body": ['people', 'age', 'hair', 'body', 'character', 'face', 'gender'],
        "dress": ['people', 'age', 'hair', 'accesory', 'body', 'dress', 'character', 'face', 'costume', 'gender'],
        "all": ['people', 'age', 'pattern', 'place', 'hair', 'modifier', 'screen', 'animal', 'effect', 'situation', 'status', 'lighting', 'accesory', 'body', 'nsfw', 'camera', 'option', 'taste', 'other', 'detail', 'action', 'dress', 'character', 'face', 'costume', 'attribute', 'weather', 'temporary', 'gender', 'favorite', 'food', 'object', 'quality', 'expression', 'life', 'background']
    }

    def is_necessary(tag, keep_tags, group_dict):
        if keep_tags == "all":
            return True
        elif tag in un_tags or group_dict.get(tag, "") in explicit_group:
            return False
        elif keep_tags == "body" and is_dressed(tag):
            return False
        elif is_background(tag):
            return False
        else:
            return True
    
    if keep_tags == "all": return input_prompt
    keep_group = keep_group_dict.get(keep_tags, ['people', 'age', 'hair', 'body', 'character', 'face', 'gender'])
    explicit_group = list(set(group_list) ^ set(keep_group))

    tags = input_prompt.split(",") if input_prompt else []
    people_tags: list[str] = []
    other_tags: list[str] = []

    group_dict = get_tag_group_dict()
    for tag in tags:
        tag = tag.strip().replace("_", " ")
        if tag in PEOPLE_TAGS:
            people_tags.append(tag)
        elif is_necessary(tag, keep_tags, group_dict):
            other_tags.append(tag)

    output_prompt = ", ".join(people_tags + other_tags)
    
    return output_prompt


def postprocess_results(results: dict[str, float], general_threshold: float, character_threshold: float):
    results = {
        k: v for k, v in sorted(results.items(), key=lambda item: item[1], reverse=True)
    }

    rating = {}
    character = {}
    general = {}

    for k, v in results.items():
        if k.startswith("rating:"):
            rating[k.replace("rating:", "")] = v
            continue
        elif k.startswith("character:"):
            character[k.replace("character:", "")] = v
            continue

        general[k] = v

    character = {k: v for k, v in character.items() if v >= character_threshold}
    general = {k: v for k, v in general.items() if v >= general_threshold}

    return rating, character, general


def gen_prompt(rating: list[str], character: list[str], general: list[str]):
    people_tags: list[str] = []
    other_tags: list[str] = []
    rating_tag = RATING_MAP[rating[0]]

    for tag in general:
        if tag in PEOPLE_TAGS:
            people_tags.append(tag)
        else:
            other_tags.append(tag)

    all_tags = people_tags + other_tags

    return ", ".join(all_tags)


@spaces.GPU()
def predict_tags(image: Image.Image, general_threshold: float = 0.3, character_threshold: float = 0.8):
    inputs = processor.preprocess(image, return_tensors="pt")

    outputs = model(**inputs.to(model.device, model.dtype))
    logits = torch.sigmoid(outputs.logits[0])  # take the first logits

    # get probabilities
    results = {
        model.config.id2label[i]: float(logit.float()) for i, logit in enumerate(logits)
    }

    # rating, character, general
    rating, character, general = postprocess_results(
        results, general_threshold, character_threshold
    )

    prompt = gen_prompt(
        list(rating.keys()), list(character.keys()), list(general.keys())
    )

    output_series_tag = ""
    output_series_list = character_list_to_series_list(character.keys())
    if output_series_list:
        output_series_tag = output_series_list[0]
    else:
        output_series_tag = ""

    return output_series_tag, ", ".join(character.keys()), prompt, gr.update(interactive=True),

            
def compose_prompt_to_copy(character: str, series: str, general: str):
    characters = character.split(",") if character else []
    serieses = series.split(",") if series else []
    generals = general.split(",") if general else []
    tags = characters + serieses + generals
    cprompt = ",".join(tags) if tags else ""
    return cprompt