from html import escape
from io import BytesIO
import base64
from multiprocessing.dummy import Pool
from PIL import Image, ImageDraw
import streamlit as st
import pandas as pd
import numpy as np
import torch
# from transformers import CLIPProcessor, CLIPModel
# from transformers import OwlViTProcessor, OwlViTForObjectDetection
# from transformers.image_utils import ImageFeatureExtractionMixin

import pickle as pkl

# sketches
from streamlit_drawable_canvas import st_canvas
from PIL import Image, ImageOps
from torchvision import transforms


# model
import os
# No reconoce la carpeta que esta dos niveles abajo src
from src.model_LN_prompt import Model
from src.options import opts
from datasets import load_dataset


DEBUG = False
if DEBUG:
    MODEL = "vit-base-patch32"
else:
    MODEL = "vit-large-patch14-336"
CLIP_MODEL = f"openai/clip-{MODEL}"
OWL_MODEL = f"google/owlvit-base-patch32"

if not DEBUG and torch.cuda.is_available():
    device = torch.device("cuda")
else:
    device = torch.device("cpu")

HEIGHT = 350
N_RESULTS = 5

from huggingface_hub import hf_hub_download,login 

token = os.getenv("HUGGINGFACE_TOKEN")

# Autentica usando el token
login(token=token)


color = st.get_option("theme.primaryColor")
if color is None:
    color = (0, 255, 0)
else:
    color = tuple(int(color.lstrip("#")[i: i + 2], 16) for i in (0, 2, 4))

@st.cache_resource
def load():
    path_images = "data/doc_explore/DocExplore_images/"
    path_model = hf_hub_download(repo_id="CHSTR/DocExplore", filename="epoch=16-mAP=0.66_triplet.ckpt")#"models/epoch=16-mAP=0.66_triplet.ckpt"

    model = Model()
    model_checkpoint = torch.load(path_model, map_location=device) # 'model_60k_images_073.ckpt' -> modelo entrenado con 60k imagenes sin pidinet
    model.load_state_dict(model_checkpoint['state_dict'])                # 'modified_model_083.ckpt' -> modelo entrenado con 60k imagenes con pidinet
    model.eval()                                                         # 'original_model_083.ckpt' -> modelo original entrenado con 60k imagenes con pidinet
    print("Modelo cargado exitosamente")

    embeddings_file_1 = hf_hub_download(repo_id="CHSTR/DocExplore", filename="dino_flicker_docexplore_groundingDINO.pkl")
    embeddings_file_0 = hf_hub_download(repo_id="CHSTR/DocExplore", filename="docexp_embeddings.pkl")

    embeddings = {
        0: pkl.load(open(embeddings_file_0, "rb")),
        1: pkl.load(open(embeddings_file_1, "rb"))
    }

    # embeddings = {
    #     0: pkl.load(open("docexp_embeddings.pkl", "rb")),
    #     1: pkl.load(open("dino_flicker_docexplore_groundingDINO.pkl", "rb"))
    # }

    # Actualizar los paths de las imágenes en los embeddings
    #for i in range(len(embeddings[0])):
    #    print(embeddings[0][i])
        #embeddings[0][i] = (embeddings[0][i][0], path_images + "/".join(embeddings[0][i][1].split("/")[:-3]))

    #for i in range(len(embeddings[1])):
    #    print(embeddings[1][i])
        #embeddings[1][i] = (embeddings[1][i][0], path_images + "/".join(embeddings[1][i][1].split("/")[:-3]))

    return model, path_images, embeddings

print("Cargando modelos...")
model, path_images, embeddings = load()
source = {0: "\nDocExplore SAM", 1: "\nDocExplore GroundingDINO"}

stroke_width = st.sidebar.slider("Stroke width: ", 1, 25, 5)

dataset_transforms = transforms.Compose([
    transforms.Resize((224, 224)),
    transforms.ToTensor(),
    transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
])


def compute_text_embeddings(sketch):
    with torch.no_grad():
        sketch_feat = model(sketch.to(device), dtype='sketch')
    return sketch_feat
    # inputs = clip_processor(text=list_of_strings, return_tensors="pt", padding=True).to(
    #     device
    # )
    # with torch.no_grad():
    #     result = clip_model.get_text_features(**inputs).detach().cpu().numpy()
    # return result / np.linalg.norm(result, axis=1, keepdims=True)
    #return torch.randn(1, 768)


def image_search(query, corpus, n_results=N_RESULTS):
    query_embedding = compute_text_embeddings(query)
    corpus_id = 0 if corpus == "DocExplore SAM" else 1
    image_features = torch.tensor([item[0] for item in embeddings[corpus_id]]).to(device)
    bbox_of_images = torch.tensor([item[1] for item in embeddings[corpus_id]]).to(device)
    label_of_images = torch.tensor([item[2] for item in embeddings[corpus_id]]).to(device)
    dot_product = (image_features @ query_embedding.T)[:, 0]
    _, max_indices = torch.topk(dot_product, n_results, dim=0, largest=True, sorted=True)

    return [
        (
           path_images +  "page" + str(i) + ".jpg",
        )
        for i in label_of_images[max_indices].cpu().numpy().tolist()
    ], bbox_of_images[max_indices], dot_product[max_indices]


def make_square(img, fill_color=(255, 255, 255)):
    x, y = img.size
    size = max(x, y)
    new_img = Image.new("RGB", (x, y), fill_color)
    new_img.paste(img)
    return new_img, x, y

@st.cache_data
def get_images(paths):
    def process_image(path):
        return make_square(Image.open(path))

    processed = Pool(N_RESULTS).map(process_image, paths)
    imgs, xs, ys = [], [], []
    for img, x, y in processed:
        imgs.append(img)
        xs.append(x)
        ys.append(y)
    return imgs, xs, ys


def keep_best_boxes(boxes, scores, score_threshold=0.1, max_iou=0.8):
    candidates = []
    for box, score in zip(boxes, scores):
        box = [round(i, 0) for i in box.tolist()]
        if score >= score_threshold:
            candidates.append((box, float(score)))

    to_ignore = set()
    for i in range(len(candidates) - 1):
        if i in to_ignore:
            continue
        for j in range(i + 1, len(candidates)):
            if j in to_ignore:
                continue
            xmin1, ymin1, xmax1, ymax1 = candidates[i][0]
            xmin2, ymin2, xmax2, ymax2 = candidates[j][0]
            if xmax1 < xmin2 or xmax2 < xmin1 or ymax1 < ymin2 or ymax2 < ymin1:
                continue
            else:
                xmin_inter, xmax_inter = sorted(
                    [xmin1, xmax1, xmin2, xmax2])[1:3]
                ymin_inter, ymax_inter = sorted(
                    [ymin1, ymax1, ymin2, ymax2])[1:3]
                area_inter = (xmax_inter - xmin_inter) * \
                    (ymax_inter - ymin_inter)
                area1 = (xmax1 - xmin1) * (ymax1 - ymin1)
                area2 = (xmax2 - xmin2) * (ymax2 - ymin2)
                iou = area_inter / (area1 + area2 - area_inter)
                if iou > max_iou:
                    if candidates[i][1] > candidates[j][1]:
                        to_ignore.add(j)
                    else:
                        to_ignore.add(i)
                        break
                else:
                    if area_inter / area1 > 0.9:
                        if candidates[i][1] < 1.1 * candidates[j][1]:
                            to_ignore.add(i)
                    if area_inter / area2 > 0.9:
                        if 1.1 * candidates[i][1] > candidates[j][1]:
                            to_ignore.add(j)
    return [candidates[i][0] for i in range(len(candidates)) if i not in to_ignore]


def convert_pil_to_base64(image):
    img_buffer = BytesIO()
    image.save(img_buffer, format="JPEG")
    byte_data = img_buffer.getvalue()
    base64_str = base64.b64encode(byte_data)
    return base64_str


def draw_reshape_encode(img, boxes, x, y):
    boxes = [boxes.tolist()]
    image = img.copy()
    draw = ImageDraw.Draw(image)
    new_x, new_y = int(x * HEIGHT / y), HEIGHT
    for box in boxes:
        print("box:", box)
        draw.rectangle(
            [(box[0], box[1]), (box[2], box[3])],  # (x_min, y_min, x_max, y_max)
            outline=color,  # Box color
            width=10  # Box width
        )
    #if x > y:
    #    image = image.crop((0, (x - y) / 2, x, x - (x - y) / 2))
    #else:
    #    image = image.crop(((y - x) / 2, 0, y - (y - x) / 2, y))
    return convert_pil_to_base64(image.resize((new_x, new_y)))


def get_html(url_list, encoded_images):
    html = "<div style='margin-top: 20px; max-width: 1200px; display: flex; flex-wrap: wrap; justify-content: space-evenly'>"
    for i in range(len(url_list)):
        title, encoded = url_list[i][0], encoded_images[i]
        html = (
            html
            + f"<img title='{escape(title)}' style='height: {HEIGHT}px; margin: 1px' src='data:image/jpeg;base64,{encoded.decode()}'>"
        )
    html += "</div>"
    return html


description = """
#  Sketch-based Detection
This app retrieves images from the [DocExplore](https://www.docexplore.eu/?lang=en) dataset based on a sketch query.
**Tip 1**: you can draw a sketch in the canvas.
**Tip 2**: you can change the size of the stroke with the slider.
The model utilized in this application is a DINOv2, which was trained in a self-supervised manner on the Flickr25k dataset.
"""

div_style = {
    "display": "flex",
    "justify-content": "center",
    "flex-wrap": "wrap",
}


def main():
    st.markdown(
        """
        <style>
        .block-container{
            max-width: 1600px;
        }
        div.row-widget > div{
            flex-direction: row;
            display: flex;
            justify-content: center;
        }
        div.row-widget.stRadio > div > label{
            margin-left: 5px;
            margin-right: 5px;
        }
        .row-widget {
            margin-top: -25px;
        }
        section > div:first-child {
            padding-top: 30px;
        }
        div.appview-container > section:first-child{
            max-width: 320px;
        }
        #MainMenu {
            visibility: hidden;
        }
        .stMarkdown {
            display: grid;
            place-items: center;
        }
        </style>
        """,
        unsafe_allow_html=True,
    )
    st.sidebar.markdown(description)

    st.title("One-Shot Detection")

    # Create two main columns
    left_col, right_col = st.columns([0.2, 0.8])  # Adjust the weights as needed

    with left_col:
        # Canvas for drawing
        canvas_result = st_canvas(
            background_color="#eee",
            stroke_width=stroke_width,
            update_streamlit=True,
            height=300,
            width=300,
            key="color_annotation_app",
        )

        # Input controls
        query = [0]
        corpus = st.radio("", ["DocExplore SAM", "DocExplore GroundingDINO"], index=0)
        # score_threshold = st.slider(
        #     "Score threshold", min_value=0.01, max_value=1.0, value=0.5, step=0.01
        # )

    with right_col:
        if canvas_result.image_data is not None:
            draw = Image.fromarray(canvas_result.image_data.astype("uint8"))
            draw = ImageOps.pad(draw.convert("RGB"), size=(224, 224))
            draw.save("draw.jpg")

            draw_tensor = transforms.ToTensor()(draw)
            draw_tensor = transforms.Resize((224, 224))(draw_tensor)
            draw_tensor = transforms.Normalize(
                mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]
            )(draw_tensor)
            draw_tensor = draw_tensor.unsqueeze(0)
        else:
            return

        if len(query) > 0:
            retrieved, bbox_of_images, dot_product = image_search(draw_tensor, corpus)
            imgs, xs, ys = get_images([x[0] for x in retrieved])
            encoded_images = []
            for image_idx in range(len(imgs)):
                img0, x, y = imgs[image_idx], xs[image_idx], ys[image_idx]
                encoded_images.append(draw_reshape_encode(img0, bbox_of_images[image_idx], x, y))
            st.markdown(get_html(retrieved, encoded_images), unsafe_allow_html=True)

if __name__ == "__main__":
    main()