import pytest
from fastcore.basics import NotStr
from fasthtml.components import *

from components.tabs.components.MyTabs import Tab, MyTabs
from components.tabs.constants import ROUTE_ROOT, Routes
from tests.helpers import matches, find_first_match, search_elements_by_name, div_ellipsis


@pytest.fixture
def tabs_instance():
  """Fixture to create an instance of tabs_instance with a mock session and ID."""
  session = {'user_id': 'test_user'}
  _id = 'test_tabs'
  return MyTabs(session, _id)


def test_initial_tabs_empty(tabs_instance):
  """Test that the tabs are initially empty."""
  assert len(tabs_instance.tabs) == 0


def test_select_tab_empty(tabs_instance):
  """Test the select_tab method when no tabs are available."""
  tabs_instance.select_tab_by_id("1")  # Tab ID "1" doesn't exist
  assert len(tabs_instance.tabs) == 0  # No changes should occur


def test_add_tab_and_select_tab(tabs_instance):
  """Test adding tabs and using the select_tab method."""
  # Add some tabs
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
      Tab("2", "Tab2", "Content 2", active=True),
      Tab("3", "Tab3", "Content 3"),
  ]
  
  # Select a specific tab
  tabs_instance.select_tab_by_id("3")
  assert tabs_instance.tabs[0].active is False
  assert tabs_instance.tabs[1].active is False
  assert tabs_instance.tabs[2].active is True


def test_add_tab_creates_a_new_tab(tabs_instance):
  title = "Test Tab"
  content = "This is a test content."
  
  tab_id = tabs_instance.add_tab(title=title, content=content)
  
  assert len(tabs_instance.tabs) == 1
  assert tabs_instance.tabs[0].id == tab_id
  assert tabs_instance.tabs[0].title == title
  assert tabs_instance.tabs[0].content == content


def test_add_tab_with_key_replaces_existing_tab(tabs_instance):
  key = "test_key"
  title1 = "Tab 1"
  content1 = "Content 1"
  title2 = "Tab 2"
  content2 = "Content 2"
  
  tab_id1 = tabs_instance.add_tab(title=title1, content=content1, key=key)
  tab_id2 = tabs_instance.add_tab(title=title2, content=content2, key=key)
  
  assert tab_id1 == tab_id2
  assert len(tabs_instance.tabs) == 1
  assert tabs_instance.tabs[0].title == title2
  assert tabs_instance.tabs[0].content == content2


def test_add_tab_no_key_creates_unique_tabs(tabs_instance):
  title1 = "First Tab"
  content1 = "First Tab Content"
  title2 = "Second Tab"
  content2 = "Second Tab Content"
  
  tab_id1 = tabs_instance.add_tab(title=title1, content=content1)
  tab_id2 = tabs_instance.add_tab(title=title2, content=content2)
  
  assert tab_id1 != tab_id2
  assert len(tabs_instance.tabs) == 2
  assert tabs_instance.tabs[0].id == tab_id1
  assert tabs_instance.tabs[1].id == tab_id2


def test_add_tab_selects_new_tab_active(tabs_instance):
  title = "Active Tab"
  content = "Active Tab Content"
  
  tabs_instance.add_tab(title=title, content=content)
  
  assert tabs_instance.get_active_tab_content() == content


def test_add_tab_with_icon_attribute(tabs_instance):
  title = "Tab With Icon"
  content = "Tab Content"
  icon = "test_icon_path"
  
  tab_id = tabs_instance.add_tab(title=title, content=content, icon=icon)
  
  assert len(tabs_instance.tabs) == 1
  assert tabs_instance.tabs[0].id == tab_id
  assert tabs_instance.tabs[0].icon == icon


def test_remove_tab(tabs_instance):
  """Test the remove_tab method."""
  # Add some tabs
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
      Tab("2", "Tab2", "Content 2", active=True),
      Tab("3", "Tab3", "Content 3"),
  ]
  
  # Remove a tab
  tabs_instance.remove_tab("2")
  assert len(tabs_instance.tabs) == 2
  assert tabs_instance.tabs[0].id == "1"
  assert tabs_instance.tabs[1].id == "3"
  assert all(tab.id != "2" for tab in tabs_instance.tabs)


def test_get_active_tab_content(tabs_instance):
  """Test the get_active_tab_content method."""
  # Initially, no content should be active (empty tabs list)
  assert tabs_instance.get_active_tab_content() is None
  
  # Add some tabs
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
      Tab("2", "Tab2", "Content 2", active=True),
      Tab("3", "Tab3", "Content 3"),
  ]
  
  # Verify the content of the active tab
  assert tabs_instance.get_active_tab_content() == "Content 2"
  
  # Change the active tab to Tab1 and verify
  tabs_instance.select_tab_by_id("1")
  assert tabs_instance.get_active_tab_content() == "Content 1"
  
  # Remove all tabs and check active content is None
  tabs_instance.tabs.clear()
  assert tabs_instance.get_active_tab_content() is None


def test_there_always_an_active_tab_after_removal(tabs_instance):
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
      Tab("2", "Tab2", "Content 2", active=True),
      Tab("3", "Tab3", "Content 3"),
  ]
  
  tabs_instance.remove_tab("2")
  assert tabs_instance.tabs[0].active is True
  assert tabs_instance.tabs[1].active is False


def test_do_no_change_the_active_tab_if_another_tab_is_removed(tabs_instance):
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
      Tab("2", "Tab2", "Content 2"),
      Tab("3", "Tab3", "Content 3", active=True),
  ]
  
  tabs_instance.remove_tab("1")
  assert tabs_instance.tabs[0].active is False
  assert tabs_instance.tabs[1].active is True


def test_render_empty_when_empty(tabs_instance):
  actual = tabs_instance.__ft__()
  expected = Div(id=tabs_instance._id)
  assert matches(actual, expected)


def test_render_when_multiple_tabs(tabs_instance):
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
      Tab("2", "Tab2", "Content 2", active=True),
      Tab("3", "Tab3", "Content 3"),
  ]
  
  actual = tabs_instance.__ft__()
  to_compare = search_elements_by_name(actual, "div", {"id": tabs_instance._id})
  
  expected = Div(
    Div(
      Span(cls="mmt-tabs-tab "),
      Span(cls="mmt-tabs-tab mmt-tabs-active"),
      Span(cls="mmt-tabs-tab "),
      cls="mmt-tabs-header"
    ),
    Div("Content 2", cls="mmt-tabs-content"),
    id=tabs_instance._id,
    cls="mmt-tabs",
  )
  
  assert matches(to_compare[0], expected)


def test_render_a_tab_header_with_its_name_and_the_cross_to_close(tabs_instance):
  tabs_instance.tabs = [
      Tab("1", "Tab1", "Content 1"),
  ]
  
  actual = tabs_instance.__ft__()
  
  expected = Span(
    Label(div_ellipsis("Tab1"), hx_post=f"{ROUTE_ROOT}{Routes.SelectTab}"),
    Div(NotStr('<svg name="close"'), hx_post=f"{ROUTE_ROOT}{Routes.RemoveTab}"),
    cls="mmt-tabs-tab "
  )
  
  to_compare = find_first_match(actual, "div.div.span")
  assert matches(to_compare, expected)