from datetime import timedelta

import pytest
from django.utils import timezone
from rest_framework.exceptions import ValidationError

from apps.projects.models import Project
from apps.tags.models import Tag
from apps.time_entries.services.time_entries import create_time_entry, stop_time_entry, update_time_entry
from apps.users.models import User
from apps.workspaces.models import Workspace


@pytest.fixture
def workspace_owner(db):
    user = User.objects.create_user(mobile="09121111111", password="secret123")
    workspace = Workspace.objects.create(name="Core", owner=user)
    return user, workspace


def test_create_time_entry_allows_only_one_running_timer_per_workspace(workspace_owner):
    user, workspace = workspace_owner

    create_time_entry(
        user=user,
        workspace_id=workspace.id,
        start_time=timezone.now(),
    )

    with pytest.raises(ValidationError):
        create_time_entry(
            user=user,
            workspace_id=workspace.id,
            start_time=timezone.now() + timedelta(minutes=5),
        )


def test_stop_time_entry_sets_end_time_and_duration(workspace_owner):
    user, workspace = workspace_owner
    entry = create_time_entry(
        user=user,
        workspace_id=workspace.id,
        start_time=timezone.now() - timedelta(hours=1),
    )

    stopped_entry = stop_time_entry(entry, end_time=timezone.now())

    assert stopped_entry.end_time is not None
    assert stopped_entry.duration is not None


def test_update_time_entry_preserves_deleted_project_and_tags(workspace_owner):
    user, workspace = workspace_owner
    project = Project.objects.create(workspace=workspace, name="Deleted project")
    tag = Tag.objects.create(workspace=workspace, name="Deleted tag", color="#0f172a")
    entry = create_time_entry(
        user=user,
        workspace_id=workspace.id,
        start_time=timezone.now() - timedelta(hours=1),
        end_time=timezone.now(),
        project=project,
        tags=[tag],
        description="Before delete",
    )

    project.delete()
    tag.delete()

    updated_entry = update_time_entry(
        entry,
        project=Project.all_objects.get(id=project.id),
        tags=[Tag.all_objects.get(id=tag.id)],
        description="After delete",
    )

    assert updated_entry.description == "After delete"
    assert updated_entry.project_id == project.id
    assert list(Tag.all_objects.filter(time_entries=updated_entry).values_list("id", flat=True)) == [tag.id]