from flask import Flask, render_template, request, redirect, url_for
import json
import os

app = Flask(__name__)

# File to store checklist items
CHECKLIST_FILE = 'checklist.json'


# Load checklist items
def load_checklist():
    if os.path.exists(CHECKLIST_FILE):
        with open(CHECKLIST_FILE, 'r') as file:
            return json.load(file)
    return []


# Save checklist items
def save_checklist(items):
    with open(CHECKLIST_FILE, 'w') as file:
        json.dump(items, file)


# List of checklist items
checklist_items = load_checklist()


@app.route('/', methods=['GET', 'POST'])
def index():
    if request.method == 'POST':
        item = request.form.get('item')
        if item:
            checklist_items.append({'name': item, 'checked': False})
            save_checklist(checklist_items)  # Save to file after adding
        return redirect(url_for('index'))
    return render_template('index.html', items=checklist_items)


@app.route('/check/<int:item_id>')
def check(item_id):
    if 0 <= item_id < len(checklist_items):
        checklist_items[item_id]['checked'] = not checklist_items[item_id]['checked']
        save_checklist(checklist_items)  # Save to file after checking
    return redirect(url_for('index'))


@app.route('/clear')
def clear():
    global checklist_items
    checklist_items = []  # Clear the list
    save_checklist(checklist_items)  # Save the empty list
    return redirect(url_for('index'))


@app.route('/list')
def list():
    return render_template('list.html', items=checklist_items)


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