import os
import shutil
import uuid
import logging
import json

from flask import Flask, redirect, url_for, request, flash, session, after_this_request
from flask import render_template
from flask import send_file

logger = logging.getLogger(__name__)
logging.basicConfig(level=logging.INFO)

UPLOAD_FOLDER = './images'
OUT_FOLDER = './anno'

app = Flask(__name__)
app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
app.config["SECRET_KEY"] = '#thaistartsfirst!'
app.config["IMAGES"] = UPLOAD_FOLDER
app.config["OUT"] = OUT_FOLDER
app.config["LABELS"] = []
app.config["CATEGORIES"] = {}  # []
app.config["HEAD"] = 0
app.config["SESSION_PERMANENT"] = False

# Ensure the upload directory exists
#if not os.path.exists(os.path.join(os.getcwd(), UPLOAD_FOLDER)):
if not os.path.exists(UPLOAD_FOLDER):
    os.makedirs(UPLOAD_FOLDER)
#if not os.path.exists(os.path.join(os.getcwd(), OUT_FOLDER)):
if not os.path.exists(OUT_FOLDER):
    os.makedirs(OUT_FOLDER)


def get_anno_path(user_id):
    return os.path.join(OUT_FOLDER, f'{user_id}.csv')


def get_images_directory(user_id):
    return os.path.join(UPLOAD_FOLDER, f'{user_id}')


@app.route('/', methods=['GET', 'POST'])
def index():
    user_id = session.get('_id')
    # user_id = request.cookies.get('session')
    if user_id is None:
        user_id = uuid.uuid4()
        session['_id'] = user_id
        logger.info(user_id)
        anno_path = get_anno_path(user_id)
        with open(anno_path, 'w') as f:
            f.write("image,category,name,xMin,yMin,xMax,yMax\n")

    if request.method == 'POST':
        if 'file' not in request.files:
            flash('No files selected')
            return redirect('/')
        img_dir = get_images_directory(user_id)
        try:
            os.makedirs(img_dir)
        except FileExistsError:
            logger.info('user already has an active session')
        files = request.files.getlist("file")
        filenames = []
        for f in files:
            f.save(os.path.join(img_dir, f.filename))
            filenames.append(f.filename)
        app.config["FILES"] = filenames
        # logger.info(app.config["FILES"], app.config["HEAD"])
        return redirect('/tagger', code=302)
    else:
        return render_template('index.html')


@app.route('/tagger')
def tagger():
    if (app.config["HEAD"] == len(app.config["FILES"])):
        # done annotating the batch of images
        app.config["HEAD"] = 0
        return redirect(url_for('final'))
    user_id = session.get('_id')
    # app.config["IMAGES"] + f'/{user_id}'
    img_dir = get_images_directory(user_id)
    image = app.config["FILES"][app.config["HEAD"]]
    labels = app.config["LABELS"]
    not_end = not (app.config["HEAD"] == len(app.config["FILES"]) - 1)
    return render_template('tagger.html', not_end=not_end, directory=img_dir, image=image, labels=labels, head=app.config["HEAD"] + 1, len=len(app.config["FILES"]))


@app.route('/next')
def next():
    image = app.config["FILES"][app.config["HEAD"]]
    app.config["HEAD"] = app.config["HEAD"] + 1
    user_id = session.get("_id")
    anno_path = get_anno_path(user_id)
    with open(anno_path, 'a+') as f:
        for label in app.config["LABELS"]:
            f.write(image + "," +
                    str(label["category"]) + "," +
                    label["name"] + "," +
                    str(round(float(label["xMin"]))) + "," +
                    str(round(float(label["yMin"]))) + "," +
                    str(round(float(label["xMax"]))) + "," +
                    str(round(float(label["yMax"]))) + "\n")
    app.config["LABELS"] = []
    return redirect(url_for('tagger'))


@app.route("/final")
def final():
    return render_template('final.html')


@app.route('/add/<id>')
def add(id):
    xMin = request.args.get("xMin")
    xMax = request.args.get("xMax")
    yMin = request.args.get("yMin")
    yMax = request.args.get("yMax")
    app.config["LABELS"].append(
        {"id": id, "name": "", "category": "", "xMin": xMin, "xMax": xMax, "yMin": yMin, "yMax": yMax})
    return redirect(url_for('tagger'))


@app.route('/remove/<id>')
def remove(id):
    index = int(id) - 1
    del app.config["LABELS"][index]
    for label in app.config["LABELS"][index:]:
        label["id"] = str(int(label["id"]) - 1)
    return redirect(url_for('tagger'))


@app.route('/label/<id>')
def label(id):
    name = request.args.get("name").lower()
    app.config["LABELS"][int(id) - 1]["name"] = name
    category = app.config["CATEGORIES"].get(name, None)
    if category is None:
        # add to category
        category = len(app.config["CATEGORIES"])
        app.config["CATEGORIES"][name] = category
    app.config["LABELS"][int(id) - 1]["category"] = category
    return redirect(url_for('tagger'))


@app.route('/image/<f>')
def images(f):
    user_id = session.get('_id')
    img_dir = get_images_directory(user_id)
    img_path = os.path.join(img_dir, f'{f}')
    return send_file(img_path)


@app.route('/download')
def download():
    user_id = session.get('_id')
    anno_path = get_anno_path(user_id)
    img_dir = get_images_directory(user_id)
    data = {}
    with open(anno_path, 'r') as f:
        for line in f.readlines():
            elems = line.strip().split(',')
            file_name = data.get(elems[0], None)
            if file_name is None:
                data[elems[0]] = {'bbox': [], 'categories': [], 'names': []}
            data[elems[0]]['categories'].append(int(elems[1]))
            data[elems[0]]['names'].append(elems[2])
            data[elems[0]]['bbox'].append([int(elems[i]) for i in range(3, len(elems))])
    img_dataset = []
    for file_name, obj in data.items():
        img_dataset.append(
            {
                'file_name': file_name,
                'objects': obj
            }
        )
    with open(f'{img_dir}/metadata.jsonl', 'w') as f:
        for item in img_dataset:
            f.write(json.dumps(item) + "\n")

    #shutil.copyfile(anno_path, f'{img_dir}/annotations_pascal_voc.csv')
    download_zip = os.path.join(img_dir, 'final')
    print(download_zip)
    shutil.make_archive('final', 'zip', img_dir)
    # shutil.make_archive(base_name=download_zip,
    #                     format='zip',
    #                     base_dir=img_dir)

    @after_this_request
    def remove_directory(response):
        try:
            shutil.rmtree(img_dir)
            os.remove(anno_path)
        except Exception as e:
            print(f"Error deleting directory {img_dir}: {e}")
        return response

    return send_file('final.zip',
                     mimetype='text/csv',
                     download_name='annotated_data.zip',
                     as_attachment=True)


if __name__ == "__main__":
    app.run(debug="True")