from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, Field
from uuid import UUID, uuid4

class Task(BaseModel):
    id : UUID = Field(default_factory = uuid4)
    name : str
    description : str
    done: bool = False

tasks_db = []

def find_task(_id):
    for idx, task in enumerate(tasks_db):
        if task.id == _id:
            return idx, task

app = FastAPI()

@app.get('/')
def index():
    return {'msg': 'hello, world'}

# Add new task to database
@app.put('/add_task')
def add_task(task : Task):
    tasks_db.append(task)

    return {'msg': 'Task created', 'task': task}

# Get all tasks from database
@app.get('/tasks')
def get_tasks():
    return {'tasks': tasks_db}

# Get one task by id
@app.get('/task/{_id}')
def get_task(_id: UUID):
    task = find_task(_id)[1]
    if task:
        return {'task': task}
    
    
    return HTTPException(status_code = 404, detail = 'This task is not found :(')

# Update task by id
@app.put('/update_task/{_id}')
def update_task(_id : UUID, updatedtask : Task):
    task = find_task(_id)
    if task:
        task_idx = task[0]
        tasks_db[task_idx] = updatedtask
        return {'msg': 'Task updated', 'task': updatedtask}
    
    return HTTPException(status_code = 404, detail = 'This task is not found :(')

# Delete task
@app.delete('/delete_task/{_id}')
def delete_task(_id : UUID):
    task = find_task(_id)[1]
    tasks_db.remove(task)

    return {'msg': f'task {task.name} deleted ;)'}