"""Round 57: click an already-selected playlist to rename it.

Clicking the selected playlist in the sidebar opens inline rename (Qt's
SelectedClicked trigger), and renaming an existing playlist opens the editor
with nothing selected and the cursor at the end rather than Qt's select-all.
A brand-new playlist still selects all, so typing replaces "untitled playlist".
"""

from PyQt6.QtCore import Qt
from PyQt6.QtTest import QTest
from PyQt6.QtWidgets import (
    QAbstractItemDelegate, QAbstractItemView, QApplication, QLineEdit,
)

from lintunes.models import Library, Track
from lintunes.library_manager import LibraryManager
from lintunes.gui.sidebar import PlaylistTree

SelectedClicked = QAbstractItemView.EditTrigger.SelectedClicked


def _tree(qapp, tmp_path):
    library = Library(tracks={1: Track(track_id=1, name="One")})
    manager = LibraryManager(library, tmp_path)
    tree = PlaylistTree(manager)
    playlist = manager.create_playlist("Road Trip")
    tree.resize(200, 300)
    tree.show()
    item = tree._find_item(playlist.persistent_id)
    tree.setCurrentItem(item)
    return tree, manager, playlist, item


def _editor(tree, item):
    editor = tree.indexWidget(tree.indexFromItem(item, 0))
    assert isinstance(editor, QLineEdit)
    return editor


def test_selected_click_is_an_edit_trigger(qapp, tmp_path):
    tree, *_ = _tree(qapp, tmp_path)
    assert tree.editTriggers() & SelectedClicked
    # Qt's defaults survive alongside it.
    assert tree.editTriggers() & QAbstractItemView.EditTrigger.DoubleClicked
    assert tree.editTriggers() & QAbstractItemView.EditTrigger.EditKeyPressed


def test_click_rename_puts_cursor_at_end(qapp, tmp_path):
    tree, _, _, item = _tree(qapp, tmp_path)
    center = tree.visualItemRect(item).center()
    # The row is already current; a real click on it arms Qt's delayed
    # editing, which opens the editor once the double-click interval passes.
    QTest.mouseClick(tree.viewport(), Qt.MouseButton.LeftButton, pos=center)
    QTest.qWait(QApplication.doubleClickInterval() + 100)
    editor = _editor(tree, item)
    assert editor.text() == "Road Trip"
    assert not editor.hasSelectedText()
    assert editor.cursorPosition() == len("Road Trip")


def test_context_menu_rename_puts_cursor_at_end(qapp, tmp_path):
    tree, _, _, item = _tree(qapp, tmp_path)
    tree.editItem(item, 0)
    editor = _editor(tree, item)
    assert not editor.hasSelectedText()
    assert editor.cursorPosition() == len("Road Trip")


def test_new_playlist_still_selects_all(qapp, tmp_path):
    tree, manager, _, _ = _tree(qapp, tmp_path)
    tree.create_playlist_interactive()
    item = tree.currentItem()
    editor = _editor(tree, item)
    assert editor.selectedText() == "untitled playlist"
    # The select-all is one-shot: the next rename is back to cursor-at-end.
    tree.closeEditor(editor, QAbstractItemDelegate.EndEditHint.NoHint)
    tree.editItem(item, 0)
    assert not _editor(tree, item).hasSelectedText()


def test_non_matching_trigger_does_not_consume_select_all(qapp, tmp_path):
    tree, _, _, item = _tree(qapp, tmp_path)
    tree._select_all_next_edit = True
    tree.setEditTriggers(QAbstractItemView.EditTrigger.NoEditTriggers)
    assert not tree.edit(tree.indexFromItem(item, 0), SelectedClicked, None)
    assert tree._select_all_next_edit


def test_committing_the_edit_renames(qapp, tmp_path):
    tree, manager, playlist, item = _tree(qapp, tmp_path)
    tree.editItem(item, 0)
    editor = _editor(tree, item)
    editor.insert(" 2026")
    tree.commitData(editor)
    assert manager.library.playlists[playlist.persistent_id].name == \
        "Road Trip 2026"


def test_first_click_only_selects(qapp, tmp_path):
    tree, manager, _, _ = _tree(qapp, tmp_path)
    other = manager.create_playlist("Other")
    item = tree._find_item(other.persistent_id)
    QTest.mouseClick(tree.viewport(), Qt.MouseButton.LeftButton,
                     pos=tree.visualItemRect(item).center())
    QTest.qWait(QApplication.doubleClickInterval() + 100)
    assert tree.currentItem() is item
    assert tree.indexWidget(tree.indexFromItem(item, 0)) is None