import uuid
from flask import Flask, render_template, request, redirect, url_for, send_from_directory, session
import json
import random
import os
import string
import logging
from datetime import datetime
from huggingface_hub import login, HfApi, hf_hub_download

# Set up logging
logging.basicConfig(level=logging.INFO,
                    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
                    handlers=[
                        logging.FileHandler("app.log"),
                        logging.StreamHandler()
                    ])
logger = logging.getLogger(__name__)

# Use the Hugging Face token from environment variables
hf_token = os.environ.get("HF_TOKEN")
if hf_token:
    login(token=hf_token)
else:
    logger.error("HF_TOKEN not found in environment variables")

app = Flask(__name__)
app.config['SECRET_KEY'] = 'supersecretkey'  # Change this to a random secret key

# Directories for visualizations
VISUALIZATION_DIRS = {
    "No-XAI": "htmls_NO_XAI_mod",
    "Dater": "htmls_DATER_mod2",
    "Chain-of-Table": "htmls_COT_mod",
    "Plan-of-SQLs": "htmls_POS_mod2"
}

def get_method_dir(method):
    if method == 'No-XAI':
        return 'NO_XAI'
    elif method == 'Dater':
        return 'DATER'
    elif method == 'Chain-of-Table':
        return 'COT'
    elif method == 'Plan-of-SQLs':
        return 'POS'
    else:
        return None

METHODS = ["No-XAI", "Dater", "Chain-of-Table", "Plan-of-SQLs"]

def generate_session_id():
    return str(uuid.uuid4())

def save_session_data(session_id, data, is_update=False):
    try:
        username = data.get('username', 'unknown')
        seed = data.get('seed', 'unknown')
        start_time = data.get('start_time', datetime.now().isoformat())
        file_name = f'{username}_seed{seed}_{start_time}_{session_id}_session.json'
        file_name = "".join(c for c in file_name if c.isalnum() or c in ['_', '-', '.'])

        json_data = json.dumps(data, indent=4)
        temp_file_path = f"/tmp/{file_name}"
        with open(temp_file_path, 'w') as f:
            f.write(json_data)

        api = HfApi()
        repo_path = "session_data_foward_simulation"

        if is_update:
            existing_files = api.list_repo_files(repo_id="luulinh90s/Tabular-LLM-Study-Data", repo_type="space")
            existing_file = next(
                (f for f in existing_files if f.startswith(f'{repo_path}/{username}_seed{seed}_{start_time}_{session_id}')), None)
            if existing_file:
                api.delete_file(repo_id="luulinh90s/Tabular-LLM-Study-Data", repo_type="space",
                                path_in_repo=existing_file)

        api.upload_file(
            path_or_fileobj=temp_file_path,
            path_in_repo=f"{repo_path}/{file_name}",
            repo_id="luulinh90s/Tabular-LLM-Study-Data",
            repo_type="space",
        )
        os.remove(temp_file_path)
        logger.info(
            f"Session data {'updated' if is_update else 'saved'} for session {session_id} in Hugging Face Data Space")
    except Exception as e:
        logger.exception(f"Error {'updating' if is_update else 'saving'} session data for session {session_id}: {e}")

def load_session_data(session_id):
    try:
        api = HfApi()
        files = api.list_repo_files(repo_id="luulinh90s/Tabular-LLM-Study-Data", repo_type="space")
        session_files = [f for f in files if f.endswith(f'{session_id}_session.json')]
        if not session_files:
            logger.warning(f"No session data found for session {session_id}")
            return None
        latest_file = sorted(session_files, reverse=True)[0]
        file_path = hf_hub_download(repo_id="luulinh90s/Tabular-LLM-Study-Data", repo_type="space",
                                    filename=latest_file)
        with open(file_path, 'r') as f:
            data = json.load(f)
        logger.info(f"Session data loaded for session {session_id} from Hugging Face Data Space")
        return data
    except Exception as e:
        logger.exception(f"Error loading session data for session {session_id}: {e}")
        return None

def load_samples():
    common_samples = []
    categories = ["TP", "TN", "FP", "FN"]

    for category in categories:
        files = set(os.listdir(f'htmls_NO_XAI_mod/{category}'))
        for method in ["Dater", "Chain-of-Table", "Plan-of-SQLs"]:
            method_dir = VISUALIZATION_DIRS[method]
            files &= set(os.listdir(f'{method_dir}/{category}'))

        for file in files:
            common_samples.append({'category': category, 'file': file})

    logger.info(f"Found {len(common_samples)} common samples across all methods")
    return common_samples

def select_balanced_samples(samples):
    try:
        # Separate samples into two groups
        tp_fp_samples = [s for s in samples if s['category'] in ['TP', 'FP']]
        tn_fn_samples = [s for s in samples if s['category'] in ['TN', 'FN']]

        # Check if we have enough samples in each group
        if len(tp_fp_samples) < 5 or len(tn_fn_samples) < 5:
            logger.warning(f"Not enough samples in each category. TP+FP: {len(tp_fp_samples)}, TN+FN: {len(tn_fn_samples)}")
            return samples if len(samples) <= 10 else random.sample(samples, 10)

        # Select 5 samples from each group
        selected_tp_fp = random.sample(tp_fp_samples, 5)
        selected_tn_fn = random.sample(tn_fn_samples, 5)

        # Combine and shuffle the selected samples
        selected_samples = selected_tp_fp + selected_tn_fn
        random.shuffle(selected_samples)

        logger.info(f"Selected 10 balanced samples: 5 from TP+FP, 5 from TN+FN")
        return selected_samples
    except Exception as e:
        logger.exception("Error selecting balanced samples")
        return []

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

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

@app.route('/index', methods=['GET', 'POST'])
def index():
    if request.method == 'POST':
        username = request.form.get('username')
        seed = request.form.get('seed')
        method = request.form.get('method')
        if not username or not seed or not method:
            return "Please fill in all fields and select a method.", 400
        try:
            seed = int(seed)
            random.seed(seed)
            all_samples = load_samples()
            selected_samples = select_balanced_samples(all_samples)
            if len(selected_samples) == 0:
                return "No common samples were found", 500
            start_time = datetime.now().isoformat()
            session_id = generate_session_id()
            session_data = {
                'username': username,
                'seed': str(seed),
                'method': method,
                'selected_samples': selected_samples,
                'current_index': 0,
                'responses': [],
                'start_time': start_time,
                'session_id': session_id
            }
            save_session_data(session_id, session_data)
            return redirect(url_for('explanation', session_id=session_id))
        except Exception as e:
            logger.exception(f"Error in index route: {e}")
            return "An error occurred", 500
    return render_template('index.html')


@app.route('/explanation/<session_id>')
def explanation(session_id):
    session_data = load_session_data(session_id)
    if not session_data:
        return redirect(url_for('index'))

    method = session_data['method']
    if method == 'Chain-of-Table':
        return render_template('cot_intro.html', session_id=session_id)
    elif method == 'Plan-of-SQLs':
        return render_template('pos_intro.html', session_id=session_id)
    elif method == 'Dater':
        return render_template('dater_intro.html', session_id=session_id)
    else:  # No-XAI
        return redirect(url_for('experiment', session_id=session_id))

@app.route('/experiment/<session_id>', methods=['GET', 'POST'])
def experiment(session_id):
    try:
        session_data = load_session_data(session_id)
        if not session_data:
            return redirect(url_for('index'))

        selected_samples = session_data['selected_samples']
        method = session_data['method']
        current_index = session_data['current_index']

        if current_index >= len(selected_samples):
            return redirect(url_for('completed', session_id=session_id))

        sample = selected_samples[current_index]
        visualization_dir = VISUALIZATION_DIRS[method]
        visualization_path = f"{visualization_dir}/{sample['category']}/{sample['file']}"

        statement = """
Please note that in select row function, starting index is 0 for Chain-of-Table 1 for Dater and Index * represents the selection of the whole Table.
Based on the explanation provided, what do you think the AI model will predict? 
Will it predict the statement as TRUE or FALSE?
        """

        return render_template('experiment.html',
                               sample_id=current_index,
                               statement=statement,
                               visualization=url_for('send_visualization', filename=visualization_path),
                               session_id=session_id,
                               method=method)
    except Exception as e:
        logger.exception(f"An error occurred in the experiment route: {e}")
        return "An error occurred", 500


@app.route('/subjective/<session_id>', methods=['GET', 'POST'])
def subjective(session_id):
    if request.method == 'POST':
        understanding = request.form.get('understanding')

        session_data = load_session_data(session_id)
        if not session_data:
            logger.error(f"No session data found for session: {session_id}")
            return redirect(url_for('index'))

        session_data['subjective_feedback'] = understanding
        save_session_data(session_id, session_data, is_update=True)

        return redirect(url_for('completed', session_id=session_id))

    return render_template('subjective.html', session_id=session_id)

@app.route('/feedback', methods=['POST'])
def feedback():
    try:
        session_id = request.form['session_id']
        prediction = request.form['prediction']

        session_data = load_session_data(session_id)
        if not session_data:
            logger.error(f"No session data found for session: {session_id}")
            return redirect(url_for('index'))

        session_data['responses'].append({
            'sample_id': session_data['current_index'],
            'user_prediction': prediction
        })

        session_data['current_index'] += 1
        save_session_data(session_id, session_data)
        logger.info(f"Prediction saved for session {session_id}, sample {session_data['current_index'] - 1}")

        if session_data['current_index'] >= len(session_data['selected_samples']):
            return redirect(url_for('subjective', session_id=session_id))

        return redirect(url_for('experiment', session_id=session_id))
    except Exception as e:
        logger.exception(f"Error in feedback route: {e}")
        return "An error occurred", 500

@app.route('/completed/<session_id>')
def completed(session_id):
    try:
        session_data = load_session_data(session_id)
        if not session_data:
            logger.error(f"No session data found for session: {session_id}")
            return redirect(url_for('index'))

        session_data['end_time'] = datetime.now().isoformat()
        responses = session_data['responses']
        method = session_data['method']

        if method == "Chain-of-Table":
            json_file = 'Tabular_LLMs_human_study_vis_6_COT.json'
        elif method == "Plan-of-SQLs":
            json_file = 'Tabular_LLMs_human_study_vis_6_POS.json'
        elif method == "Dater":
            json_file = 'Tabular_LLMs_human_study_vis_6_DATER.json'
        elif method == "No-XAI":
            json_file = 'Tabular_LLMs_human_study_vis_6_NO_XAI.json'
        else:
            return "Invalid method", 400

        with open(json_file, 'r') as f:
            ground_truth = json.load(f)

        correct_predictions = 0
        true_predictions = 0
        false_predictions = 0

        for response in responses:
            sample_id = response['sample_id']
            user_prediction = response['user_prediction']
            visualization_file = session_data['selected_samples'][sample_id]['file']
            index = visualization_file.split('-')[1].split('.')[0]

            ground_truth_key = f"{get_method_dir(method)}_test-{index}.html"
            logger.info(f"ground_truth_key: {ground_truth_key}")

            if ground_truth_key in ground_truth:
                # TODO: Important Note ->
                # Using model prediction as we are doing forward simulation
                # Please use ground_truth[ground_truth_key]['answer'].upper() if running verification task
                model_prediction = ground_truth[ground_truth_key]['prediction'].upper()
                if user_prediction.upper() == model_prediction:
                    correct_predictions += 1
                    
                if user_prediction.upper() == "TRUE":
                    true_predictions += 1
                elif user_prediction.upper() == "FALSE":
                    false_predictions += 1
            else:
                logger.warning(f"Missing key in ground truth: {ground_truth_key}")

        accuracy = (correct_predictions / len(responses)) * 100 if responses else 0
        accuracy = round(accuracy, 2)

        true_percentage = (true_predictions / len(responses)) * 100 if len(responses) else 0
        false_percentage = (false_predictions / len(responses)) * 100 if len(responses) else 0

        true_percentage = round(true_percentage, 2)
        false_percentage = round(false_percentage, 2)

        session_data['accuracy'] = accuracy
        session_data['true_percentage'] = true_percentage
        session_data['false_percentage'] = false_percentage

        save_session_data(session_id, session_data, is_update=True)  # Update the existing file

        return render_template('completed.html',
                               accuracy=accuracy,
                               true_percentage=true_percentage,
                               false_percentage=false_percentage)
    except Exception as e:
        logger.exception(f"An error occurred in the completed route: {e}")
        return "An error occurred", 500

@app.route('/visualizations/<path:filename>')
def send_visualization(filename):
    logger.info(f"Attempting to serve file: {filename}")
    base_dir = os.getcwd()
    file_path = os.path.normpath(os.path.join(base_dir, filename))
    if not file_path.startswith(base_dir):
        return "Access denied", 403

    if not os.path.exists(file_path):
        return "File not found", 404

    directory = os.path.dirname(file_path)
    file_name = os.path.basename(file_path)
    logger.info(f"Serving file from directory: {directory}, filename: {file_name}")
    return send_from_directory(directory, file_name)

@app.route('/visualizations/<path:filename>')
def send_examples(filename):
    return send_from_directory('', filename)

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860, debug=True)