import uuid
from flask import Blueprint, render_template, request
from sqlalchemy import delete

from app.extensions import db
from app.models.collection import Collection
from app.models.task import Task
from app.models.session import Session

from .tasks import parse_users_task, send_messages_task, add_to_group_task

tasks = Blueprint("tasks", __name__, url_prefix="/tasks", template_folder="templates")

@tasks.route("/", methods=["GET"])
def get_tasks():
    tasks = Task.query.all()
    sessions = Session.query.filter_by(authorized=True).all()

    return render_template("tasks_cards.j2", tasks=tasks, sessions=sessions)

@tasks.route("/session/<int:session_id>", methods=["POST"])
def create_task(session_id: int):
    info = request.form
    collection_id = int(info['collection'])
    
    collection = Collection.query.get_or_404(collection_id)
    session = Session.query.get_or_404(session_id)

    types = list(filter(lambda item: item in ('parse', 'add', 'message'), info.keys()))
    
    if len(types) <= 0:
        return "", 204
    
    type = types[0]
    
    task = Task(
        name = info.get('task_name') or str(uuid.uuid4()),
        session = session,
        collection = collection,
        status = "CREATED",
        status_message = "Задача создана",
        type = type,
        url = info.get('parse') or info.get('add'),
        message = info.get('message'),
        file = None
    )

    db.session.add(task)
    db.session.commit()

    start_task(task.id)

    return '', 204

@tasks.route("/<int:task_id>", methods=["DELETE"])
def delete_task(task_id: int):
    task: Task = Task.query.get_or_404(task_id)
    stop_task(task.id)
    db.session.delete(task)
    db.session.commit()
    
    return '', 204

@tasks.route("/<int:task_id>/stop", methods=["PUT"])
def stop_task(task_id: int):
    task = Task.query.get_or_404(task_id)
    fn = None

    match task.type:
        case 'message':
            fn = send_messages_task

        case 'add':
            fn = add_to_group_task
    
    if task.task_id and fn:
        task_fn = fn.AsyncResult(task.task_id)
        task_fn.abort()
    
    task.status = "STOPING"
    task.status_message = "Задача останавливается"

    db.session.commit()
    
    return '', 204


@tasks.route("/<int:task_id>/start", methods=["PUT"])
def start_task(task_id: int):
    task: Task = Task.query.get_or_404(task_id)

    match task.type:
        case 'message':
            send_messages_task.delay(task_id=task_id)

        case 'add':
            add_to_group_task.delay(task_id=task_id)
        
        case 'parse':
            parse_users_task.run(task_id=task_id)
            delete_task(task_id)

    return '', 204

@tasks.route("/<int:task_id>/change", methods=["PUT"])
def change_settings(task_id: int):
    task: Task = Task.query.get_or_404(task_id)
    data = request.form

    if data.get("session"):
        task.session = Session.query.get(data.get("session"))
    
    if data.get("name"):
        task.name = data.get("name")

    db.session.commit()

    return '', 204