# Importuje to co pochodzi z systemu
import asyncio
import json
from pathlib import Path

# Importuje to co doinstalowałem
import aiofiles

# Importuje moje własne pliki

TASKS_FILE = Path("tasks.json")

async def load_tasks():
    if not TASKS_FILE.exists():
        return []
    
    async with aiofiles.open(TASKS_FILE, "r", encoding="utf8") as file:
        content = await file.read()
        return json.loads(content) if content else []
    
async def save_tasks(tasks):
    async with aiofiles.open(TASKS_FILE, "w", encoding="utf8") as file:
        await file.write(json.dumps(tasks, indent=1))
        
async def add_task(description):
    tasks = await load_tasks()
    tasks.append({"description": description, "done": False})
    await save_tasks(tasks)
    
async def list_tasks():
    tasks = await load_tasks()
    return tasks

async def complete_tasks(index):
    tasks = await load_tasks()
    if 0 <= index <= len(tasks):
        tasks[index]["done"] = True
        await save_tasks(tasks)
        return True
    
    return False